Device and method for thermal gas-hydrodynamic oil and gas formation fracture (versions)
FIELD: oil and gas industry.
SUBSTANCE: device for thermal gas-hydrodynamic oil and gas formation fracture comprises a logging cable with a cable head and consists of a remote control unit with a gamma sensor, an instrument head, a mandrel sub, a gas-generating charge case and an independent logging unit. The gas-generating charge of a high-energy antiknock solid-fuel composition is presented in the form of sticks of the external diameter of 36-70 mm and the length of 300-1500 mm with an axial passage of the diameter of 5-28 mm with an electrical igniter. The charge is positioned in a case of the diameter of 89 mm with a wall of the thickness of 9-11 mm and a gas outlet channel of the area of 70% a cylindrical surface of the case with end adapters of the diameter of 105 mm. The adapters are used as formation targeting raisers with the efficiency of the dynamic action effectiveness being a multiple greater than uncased gas generators. The real-time pressure and temperature time history is recorded by independent digital devices at the discretion of 8.0-10.0 thousand measurements per second. To provide better emergency tolerance and to make the gas generator advance into wells at a zenith of 90° or more, the multilayered logging cable of the diameter of 8-28 mm and the tensile strength of 60-250 kN is used.
EFFECT: more effective involvement of terminal oil-saturated sites.
3 cl, 2 dwg, 1 app
The invention relates to the oil and gas industry, in particular to methods and devices for the intensification of the wells, and provides high efficiency due to the cyclic application of hull gas-generating device, is lowered into the borehole on a logging cable through the creation of a directional thermogasodynamics impact on the reservoir in a managed and controlled process conditions at a concentration of energy in the perforated zone, optimization of mass and length of the gas-generating charge when the rate of increase of pressure in the well is not less than 100 MPa/s to generate a pressure pulse above the mountain in order to disclose existing and creation of new fractures in the reservoir during the registration of the dynamics of change of pressure standalone digital systems at a frequency samples 8,0-10,0 thousand, with the aim of documenting and assessing the completeness of fracturing on the wave and amplitude parameters of the gas dynamic process in well with the localization interval of crack formation on the dynamics of changes in thermal field.
A known method of hydraulic fracturing (fracking)widely used in industrial practice to restore and increase the productivity of wells, filtration properties in the near-wellbore area of the formation degraded in the essays of construction, development and operation. The essence of fracturing is that in the well under high pressure in excess of hydrostatic 1.5-3.0 times, pumped liquid, resulting in the near-wellbore area of the formation existing cracks are revealed and new ones are formed. To prevent closure of these cracks in them introducing coarse sand. As a result, the productivity of the well is significantly increased . However, despite the effectiveness of this technology visokogradnja, expensive and not always give the expected results.
The invention relates to a device that uses the mode of combustion of solid fuels in the form of recycled rocket fuel or high-energy mixed compositions nematodirosis type. The domestic industry has mastered the production of powder charges of various sizes ranging in length from 500 to 1800 mm in diameter from 42 to 100 mm and weighing from 2 to 32 kg [1, str]. The efficiency of such devices to break, thermographically processing of the productive formation and evaluation of completeness of the process depends on many factors, primarily on the amplitude and dynamics of increase and decrease is generated in the combustion zone of the pressure pulse and the total duration of exposure determine the number and length of generated cracks, technologically advanced, and the one mode and informational support manufacturing operations.
There are many analogues devices - gas solid fuel, is lowered into the well on a cable and different design and capabilities stimulation, allowing a wide range to change the dynamics of the load increases on the rocks and create a stress state in the reservoir with a speed of up to 104MPa/s At fracturing provides the rate of increase of the load on the layer not more than 1 MPa/s.
The famous "gas Generator solid fuel with adjustable pressure pulse for stimulation" . The task of the invention is solved in that between the igniter charge and armored with the outer surface charges placed unarmored tubular charges with a large initial surface combustion. After combustion of all unarmored charge pressure decreases and then reaches a maximum value due to the progressive nature of the burning armored charges, providing a longer duration of power stimulation, while gradually reducing the pressure to the initial .
The disadvantage of this generator should be noted that to increase the speed of increase of pressure applied high-risk igniter detonation action with an explosive cartridge and detonating cord is m, not provided the required orientation of thermodynamic effects and dynamics unloading of the reservoir to most effectively achieve the goal; the lack of information support for monitoring and evaluation of the completeness of the process.
The famous "charge of the planar sectional for gothicrainbow stimulation" . The device consists of a node of the igniter and sections of the charge, made of compounds, which provides burning in water, water and acidic environments, and may have one or more igniter sections and snap details for the collection of partitions of charge passed through the Central channel of each section. Snap is a compound barbell with cones-centralizers streamlined for tightening and preload partitions charge close to each other. Sections of the charge does not have a protective coating. This ensures that the combustion over the entire surface charge. The configuration of the Central channel has a shape with a developed surface burning to ensure a predetermined period of combustion and pressure for hydraulic fracturing. For registration of parameters of pressure, temperature, time and binding on the depth location of the device in the borehole collar locator provides a measuring unit having electrical communication with ground control.
the disadvantages, reducing the effectiveness of the application of this generator, the absence of regulatory conditions for use depending on the state of the secondary opening and evaluation successful completion gothicrainbow stimulation and low reliability of the measuring unit in the hydrodynamic conditions during operation of the gas generator. Rod mounting structure of the gas-generating charges do not provide the required emergency tolerance, leads to the goal and the overlap of the cable with emergency complications.
Interesting "caseless Charge sectional for gas-dynamic stimulation" , different from the previous charge  the presence of passing a hollow channel inside the drill rods and couplings along their Central axis for placement of electrical lines node ignition and electronic unit mounted on the rod below the charge of the gas generator. The positive decision in the design of the gasifier is the placement of the electronic unit on the rod below the charge, however, the presence of a flow channel with a diameter of 6-8 mm for placement of electrical wires reduces the strength rod snap, complicates the installation requires the use of a multi-geophysical cables, increasing the accident rate work, especially when the set of nine or more Porokhova the sections of the charge.
Known "Ways gothicrainbow stimulation" [5, 6]that implement the application device according to the patent , characterized in that for the implementation of fracturing spend several sequential stimulation with registration operation mode of the charge and mass selection sections of the charge at the first descent to provide in the range of processed reservoir pressure exceeds the tensile strength of rocks, to create fractures in the reservoir and provide a hydrodynamic connection with the well. For subsequent influences determine the mass of the charge to provide in the range of processed reservoir pressure is sufficient for the development and deepening of cracks formed in the first combustion sections of the charge. To change the amplitude of the pressure during the combustion of the first and subsequent charges judged on the nature of the stimulation and the response of the bottomhole zone on impact.
In the method according to the patent  when selecting a mass burn charges take into account the depth of the treated layer, its length and the number of perforations, the mass of each subsequent charge is increased by increasing the length of the rod and charge.
The main disadvantage of these methods gothicrainbow stimulation is the lack of criteria for Enki completion stimulation and justify the need to continue work. The increase in the mass of the charge by increasing the length of the charge and the rod increases the accident rate works.
Known "Method gothicrainbow stimulation" , including deep perforations, the use of devices on patents  or  to ensure the sealing of the joints of the sections of the charge and the through-holes of the diffuser to use the internal cavity of the charge and diffuser for placing substances, while providing with gas-dynamic impact additional impact for the development and treatment of cracks or fixing their quartz sand, to reduce the viscosity of oil or increase the permeability of the layer of foamable compositions. The combination of gas-dynamic stimulation with other methods of intensification of afterithaca undoubtedly is of practical interest. However, the recommended patent volume stimulating substances placed in the inner cavity of charge taking into account the real possibility of delivery in the zone of the reservoir through the perforations in the process of combustion of the charge, is clearly not sufficient to produce the expected result. In addition, filling the internal cavity of the granular or gel-like substance in the process of mounting the battery in the field to provide the necessary sealing end is connected to the th is time-consuming and-low-tech.
Known "Method of gas-dynamic stimulation and device for its implementation" .
Method for gas-dynamic stimulation, including deep perforations in the interval of the processed layer, the die Assembly sectional charge with snap by passing the hollow composite rod through the Central channel of the sections of the charge, tightening and preload partitions charge close to each other couplings-centralizers, the connection of the wireline with electronics, the burning of the charge in the perforation interval, the control of combustion in real time and recording characteristics of the operation mode of the charge, such as temperature and pressure in the well fluid in the interval of exposure at a safe distance from the charge, characterized in that the registration of temperature and pressure above the combustion zone charge with a frequency of 0.5 MS and, optionally, a pressure directly into the combustion zone of the charge, which in the lower part of the electronics place additional pressure sensor, and a hollow composite rod against charge perform with a radial hole, at least one, for gas dynamic communication zone of combustion of the charge through the cavity of the composite rod and a radial hole with an area of occupancy of an additional sensor on the effect, when this maximum pressure values measured above the zone of combustion of the charge and directly into the combustion zone, the difference of these pressures estimate the energy of the pressure pulse is spent on the gap layer, and the energy of the pressure pulse is trapped in the well bore, compare these data and the rise and decay of the pressure and temperature are judged on the effectiveness of the stimulation - realized or unrealized local fracturing, assess the need for re-stimulation and is required for energy, repeated exposure, and registration of the aforementioned parameters assess changes in these parameters from one exposure to another, and the nature of these changes, which judge about the increase in the radius of local fracturing and the need for subsequent impacts on the layer.
The method involves the localization interval effects on the processed layer by using the snap-charge against the selected spacing of the perforations couplings-centralizers, close to the inner diameter of the casing string.
The disadvantages of this method include the difficulty of assessing the effectiveness of the stimulation and implementation of local fracturing on the recorded parameters of pressure and temperature using the proposed electronic unit is a separate line telecommunication with the ground unit and the hydraulic channels for additional sensors insufficient frequency measurements; internal axial channel in the rod reduces their strength and with increasing diameter of the coupling-centralizers in rod design of the gasifier certainly leads to a complex emergency situations; imperfect mounting electropotentials system causes frequent failures; the apparatus and method do not provide the possibility of use in deviated and horizontal wells.
A close analogue of the invention is a device with a gunpowder charge to stimulate wells and the method of its implementation . Device with gunpowder charge for stimulation of wells containing connected to the logging cable powder charge, consisting of solid elements made of non-plated ballistic or composite solid rocket fuel in the form of a cylinder with a Central circular channel, characterized in that the solid elements of the charge is fixed on the load-carrying rope, passing through the Central channel or outside the solid elements, the gaps between which are closed combustible sleeves, in addition, solid-propellant charges are enclosed in a protective casing, and the node ignition is made in the form of a spiral filament mounted in one of the solid elements, or is with the igniter cartridge WB is Izzy geophysical cable, and between the logging cable and the battery has a safety bar. The role of the protective casing can perform a segment of tubing or combustible sleeve between charges.
The spiral filament is installed in the annular gap on the outer surface of the solid fuel charge and fill with heat-resistant sealant to prevent contact of the spiral with the downhole fluid. The exhaust from the spiral electrical wire is insulated from the liquid. The ends of the wires connected to conductors in the logging cable and the connections are isolated when assembling the device before running in the hole.
The device with a conventional logging cable is only applicable for vertical wells. The use of the device logging cable for RF Patent No. 2105326  in contrast to conventional cable has high strength (120...230 kN) and a sufficiently high rigidity to promote solid propellant charge with snap-in horizontal sections of the wells. This cable consists of three or more insulated conductive lived, covered with two or three pairs of layers of armor with oppositely directed povivami wires in each pair, the second and the third pair of layers of armor made of wire, the diameter of which is 1.3...2.5 times the diameter of the wires of the first pair of layers of armor, while over each of the pairs is applied under pressure to the coating of plastic adhesive material, filling the gaps between the armor wires. External cable diameter calibrated over the entire length in the range of 15...32 mm
The disadvantages of the device should include the complexity and imperfection of the fixture design, lack of information support of the hydrodynamic process of operation of the device with the powder charge, which eliminates the possibility of evaluating the effectiveness of the stimulation. Crushery device used for measuring the maximum pressure is not suitable for this task.
It is known Device for perforating and fracturing"  hull type, characterized in that for simultaneous shot of the walls of the wells and fracturing it is made of separate sections with shaped charges and powder cameras, which are placed in the powder charges, flammable sequentially from the igniter in slow motion. To restrict the pressure of the powder gases is applied in this packers with rubber cuffs, decompresses the annular piston under the pressure of the powder gases. This device by means of a lip pakiruumi systems operating in the automatic mode, provides a directional effect of the powder gases in the reservoir through the open hole punch section.
It is not the Cam, this device should include the design complexity and the lack of information support for monitoring the process and evaluating the effectiveness of gas-dynamic fracturing.
The closest analogue of the invention is a Device and method for gas dynamic gap reservoir to the development of hard stocks (options)" . In devices according to this invention for gas-dynamic rupture productive reservoirs of oil and gas wells as a load-bearing foundations for installation of gas-generating element with an electric igniter, ensuring in the process of burning the rate of increase of pressure not less than 100 MPa/s at the maximum pressure 2...4 times higher than the hydrostatic registration of the dynamics of change of pressure standalone digital pressure gauge in real time with a resolution...10,0 7,0 thousand measurements per second, use a metal rod or geophysical cable multilayer structure with a degree of freedom from 1...3° to 10...15° to promote the generator not only in the vertical, but in directional and horizontal wells with geophysical cable multilayer structures with varying specific gravities in length and breaking strength 100...250 kN with a diameter of 12...28 mm
Using these devices is the method of gas-dynamic rupture productive layers while providing a surface reservoir perforation channels up to 2000 cm2/the binding location of the gas generator to the geological section of the gamma-method and subsequent cyclic gas-dynamic effects in a managed and controlled manner with the greatest concentration of energy in a perforated area by optimizing the weight and length of the gas-generating charge for creating a pressure impulse in 1,4...3 times higher pressure fracturing and subsequent formation of depression-repressional wave process in the infrasonic frequency range for involvement in the development of a deadlock (congestive) saturated areas, when registering the dynamics of changes in pressure standalone digital systems for documenting and assessing the completeness of fracturing on the wave and amplitude parameters of gas-dynamic process.
The disadvantage of these devices should be noted the high level of emergency complications when working in vertical wells with serial geophysical cable with breaking strength up to 60 kN owing goal and imposing nodes on the cable and a high probability of spontaneous combustion of gas-generating charges as a result of friction during the descent in inclined wells.
A close analogue of the invention is a downhole apparatus for fracturing - powder pressure generator Cabinet ASGC . The main part of the combustion chamber, in which is placed the powder charges. The burning propellant charges is carried out by means of the igniter. The expiration of the propellant gases from the combustion chambers into the well occurs through a conical nozzle and side Windows is perehodnik. To the lower part of the device attached Cabinet cumulative hammer, with which perestrelivayutsya channels in the walls of the borehole before fracturing. To control the pressure in the combustion chamber and the wellbore apply kreselnye devices based on the measurement of deformation them to assess the magnitude of the pressure.
The main parts of the apparatus are made of high-strength steels, while ensuring high standards of integrity to work in downhole conditions. The device is designed to work with three-core armored cable, one lived which is used to initiate a punch and ignition of the propellant charges, and the other two for emergency ignition of the charge in the cable head to release the cable from the device if it is sticking.
The disadvantages ASGC should include the complexity and imperfection of the design of nozzle systems, leading to strong shock and breakages of the cable, and the lack of information assurance process.
The task of the invention is the design of the tank of gas generator solid fuel and method of conducting thermogasodynamics impact on the reservoir in a managed and controlled manner to disclosure of existing and creation of the new cracks in the natural retaining particles of destroyed rocks with the aim of promoting the development of oily zones with a fixed oil, development where existing methods fail.
The problem is solved in that for thermogasodynamics fracturing oil and gas wells used the device of vessel types, including geophysical cable for shutter device consisting of a cable head unit remote control with the instrument head, the sub, the box for the gas-generating charge and a gauge block, wherein the gas-generating charge presents high energy fuel composition in the form of checkers with an external diameter of 36...70 mm at a length of 300...1500 mm with an axial channel with a diameter of 5...28 mm with an electric igniter, ensuring in the process of combustion pressure increase at a rate not less than 100 MPa/s at hydrostatic pressure 5-35 MPa, installed in the housing unloaded-type channel area of up to 70% of the lateral surface of the combustion chamber, with end adapters that act as hubs directional thermodynamic effects on the treated reservoir when the rate of increase of pressure in the combustion charge is not less than 100 MPa/s, with the efficiency of dynamic effects in 1.9...2.8 times higher uncased gas generators for maximum pressure 3-4 times higher than the hydrostatic registration speakers who modify the pressure and temperature of the Autonomous digital devices in real time with a resolution of 8.0 10.0 thousand... measurements per second at the delivery interval of the productive formation using a logging cable multilayer structures with a diameter from 8 to 32 mm, providing not only the descent of the device in a vertical well, but the promotion of it in directional and horizontal wells[10, 11, 12].
For thermogasodynamics stimulation applied solid gas-generating items out of recycled powder products and high-energy mixed compositions nematodirosis type checkers with an external diameter of 36...70 mm at a length of 300...1500 mm with an axial channel with a diameter of 5...28 mm and temperature of burning 2500-3000°C, which allows the combustion process to provide the desired concentration of energy of the powder gases for fracturing and heating of the near-wellbore zone to 250-350°C With the aim of deepest penetration of the products of combustion, melting and subsequent extraction asfaltoprugnacam deposits.
Connecting the body core to the geophysical cable for delivery in the borehole is carried out using standard coupling connections. Information support thermogasodynamics fracturing is carried out using the remote control and Autonomous digital devices, providing registration charts pressure and temperature real time increments to 10.0 thousand samples per second reflecting amplitude, wave and temperature parameters thermogasodynamics process by which to assess the effectiveness of fracturing. Accommodation Autonomous devices may be made in the case of the registration of the block below the gasifier or in the sub above him.
Work on thermogasodynamics fracturing recommended on the logging cable with a breaking strength (120...250 kN) and a sufficiently high rigidity to promote gas generator in horizontal sections of the wells and prevent accidents. This cable consists of three or more insulated conductive lived, covered with two or three pairs of layers of armor with oppositely directed povivami wires in each pair, the second and the third pair of layers of armor made of wire, the diameter of which is 1.3...2.5 times the diameter of the wires of the first pair of layers of armor, while on top of each pair is applied under pressure to the coating of plastic adhesive material filling the gaps between the armor wires. External cable diameter calibrated over the entire length in the range 12...28 mm, and the plot groundviews part of the cable that is designed for operation in inclined and horizontal sections of the well, starting from the second or third layer of armor, up to 75% of the wires is deceny with a uniform offset of trim along the length of the plot in the transition from the lower layer to the upper, and the remaining wire to form a reinforcing skeleton for polymer membranes with a decrease in the specific gravity of the cable in this area up to 30%, and in the upper layer of armor wire can be laid without clipping along the length of the cable at regular intervals between the wires down to 50% packing density of wires in the layer, while the gaps between the wires are filled polymeric material in the coating process external polymer sheath[10, 11, 12].
According to variants of the claimed device technical result is achieved in that the method thermogasodynamics gap productive formation of oil and gas wells, including the installation of a tank of gas generator on the logging cable with reference to the geological section of the gamma method in the interval of the reservoir, perforated, bringing the gas generator and the establishment of thermodynamic pulse, characterized in that assesses the quality of secondary drilling and surface drilling perforation channels less than 1000 cm2/m perforated interval is an additional perforation or cumulative sverlyaschie punches to ensure the surface of the reservoir perforation channels up to 2000 cm2/m or more, followed the cyclical impact on the productive formation by repeated descent tank of gas generator in the interval of the productive formation with sequential increase in mass of the charge for thermogasodynamics impact in a managed and controlled manner by providing the greatest concentration of energy of the powder gases and warming up to 250-350°With a perforated zone at a speed of increase of pressure in the well over 100 MPa/s to generate a pressure pulse is higher than the strength of rocks in order to disclose existing and formation of new fractures in the reservoir under natural attaching them to the rock particles as a result of irreversible deformation  with the formation of depression-repressional wave process in the infrasonic frequency range to ensure involvement in the development of a deadlock (congestive) saturated areas without disturbing the cement lining and casing with the assessment of the completeness thermogasodynamics fracturing on amplitude parameters and decay time of the wave process with the possibility of localization interval of crack formation on the dynamics of changes in thermal field. It is known that cyclic dynamic loading of rocks with pressure pulses are most effective to reduce the strength of the rocks, their break, disclosure, and the creation of new cracks [14, str].
The effectiveness of stimulation is largely determined by hydrodynamic perfectly well. It is known that the total area of perforations more than 25% of the total surface t of the UBA, the pressure pulse through the perforation interval run smoothly. The reduction of the total area below the specified value significantly transforms the pressure pulse in absolute magnitude and nature of impact. Hydrodynamic perfection reservoir depends not only on the density of the perforation, but also on the depth of the perforations, their arrangement in the column, header type, and other factors [14, str]. Therefore, until the gas dynamic effects quality is assessed secondary drilling density of the perforations and over the surface of the opening and, when the surface of the reservoir perforation channels less than 1000 cm2/m perforated interval is an additional perforation or cumulative sverlyaschie punches to increase the surface of the reservoir up to 2000 cm2/m and more.
Mode control cyclic effects entails a gradual increase in the mass of the charge tank of gas generator 25...75% depending on the geological conditions and the technical condition of the well with the highest concentration of energy of the powder gases temperature in the perforated area of the reservoir due to the Cabinet design of the generator, providing optimization of mass and length of the gas-generating charge, reducing the negative impact on the production casing, the increase in technology is licnosti, safety and emergency resilience work.
In the hull gasifier for directional thermodynamic impact applied to the hub in the form of special adapters, located at its ends. For gaseous products from the combustion chamber in the housing provided by the channels with a total area of up to 70% from its inner surface. The efficiency of gas-dynamic effects corps gasifier pressure compared with open-frame is determined by the structural parameters of the energy hubs, limiting its spread beyond the productive formation along the axis of the well.
In the device of thermodynamic gap productive reservoirs of oil and gas wells in the first embodiment hull sections are made of pipes with an external diameter of 89 mm with a wall thickness of 9...11 mm and end adapters with a diameter of 105 mm
In the device according to the second variant hull sections are made of pipes with an outer diameter of 73 mm with wall thickness of 5.5...8 mm and end adapters with a diameter of 82 mm
Information unit used in the hull gasifier, while working with a logging cable allows in a single technological cycle to solve the following tasks:
- change monitoring fluid level in the wellbore before and after g is cogenerator;
- determining the size and dynamics of change of pressure in the well during operation of the gas generator in real-time;
binding to the geological section of the arrangement of the gas generator for gamma method;
- isolation and localization interval of crack formation on the dynamics of changes in thermal field, registered independent thermometer with simultaneous recording of gamma logging;
- assessment of the effectiveness and completeness of fracturing on the wave and amplitude parameters of gas-dynamic process when the gas generator.
The use of recycled powder products and high-energy mixed compositions nematodirosis type on the basis of perchlorate or potassium nitrate and other gas-generating compositions, providing in the process of burning high rate of increase of pressure and unloading of rocks under cyclic dynamics impact variable amount of charge, ensuring consistent disclosure of existing and creation of new cracks in the reservoir, affecting the attenuation registered hydrowave process. The decay time in the range of 10...40 with corresponding 1...3 periods of the oscillations, taken as the main indicator of the completion of the process thermogasodynamics fracturing. The rate of crack growth on the reduction of the pressure, the deposits accepted at 80% of maximum. Isolation and localization interval fracturing is carried out on thermogram, registered standalone digital thermometer.
The physical essence thermogasodynamics gap productive formation due to the high increase of pressure and temperature in the zone of the perforated interval of the productive formation with a maximum pressure of 2...4 times higher than the hydrostatic with duration of 1-2 s for disclosure of existing and creation of new cracks during subsequent high pressure drop for the irreversible destruction of the matrix of rocks and natural fixing cracks with the formation of depression-repressional wave process with pulses of depression from 10 to 0.1 MPa and pulses repression from 9 to 0.1 MPa in the infrasonic frequency range, removing molten asfaltoprugnacam deposits, ensuring involvement in the development of a deadlock (congestive) saturated areas, the development of which the existing technology fails.
Dynamics of gas-dynamic effects on the reservoir are presented in figure 1.
As follows from the description of the invention to provide a high productivity of oil and gas wells with involvement in the development of the oil-bearing zones with fixed what eftu applied solid gas-generating charges in hull generators pressure with greater functionality on the concentration of thermodynamic energy and temperature in the range of productive reservoir optimization of mass and length of the charge to create a high-speed pulse pressure, a multiple in excess of the pressure required to break rocks and create new cracks during subsequent high pressure to fracture the matrix of rocks and the formation of a depression-repressional wave process in complex with a cyclic mode of execution of works and a highly effective means of information provision and delivery of these devices in well with Zenith angles up to 90 degrees or more.
The corps device of the gas generator pressure is depicted in figure 2. It consists of logging cable multilayer structure 1, the cable lug 2, remote control 3, the instrument head 4, the clutch 5, sub 6, hull sections 8 with end adapters 7 and 14, which serves as the hub of thermodynamic energy and connectors with sub 6 and the housing of the Autonomous registration unit 15 and a cap 16. Casing sections are connected by a coupling 13. Solid gas-generating checkers 12 with an electric igniter 11 and electromagnetically 9 installed in the hull sections 8 having a through window 10 to exit gases.
For the manufacture of body parts gas generator used high-strength pipe oil when rtment using tapered threaded connections, providing the necessary strength and durability.
In the device of thermodynamic gap productive reservoirs of oil and gas wells in the first embodiment hull section 8 are made of pipes with an external diameter of 89 mm with a wall thickness of 9...11 mm and end adapters 7, 14 with a diameter of 105 mm
In the device according to the second variant hull sections are made of pipes with an outer diameter of 73 mm with wall thickness of 5.5...8 mm and end adapters 7, 14 with a diameter of 82 mm
Preparing the device for operation in the following sequence.
The preparation of the lower Cabinet section 8 corresponding to the placement of the calculated quantity of the selected type gas-generating checkers 12. To the lower end section 8 is connected with the adapter 14 the case of Autonomous registration unit 15, which are Autonomous recording devices, which is closed by a plug 16. Equipment generator pressure gas-generating cartridges 12 is made by their placement in the hull sections 8, connected by a coupling 13, with the placement of the electric igniter 11 between the upper and lower piece with the passage of electro 9 from the igniter on the cross-channel top checkers through the adapter 7 and the sub 6 to the instrument head 4, to which podsaedinat the camping unit information control 3. The geophysical cable 1 layout corps core Assembly is connected using a cable lug 2. In this form the device is lowered into the hole.
The device operates as follows. When the shutter device is controlled by the liquid level in the well is the binding location of the gas generator to the geological section and install it in the desired interval using the sensors of the remote control 3. After the device is energized by a geophysical cable 1 through the cable to the handpiece 2 and the remote control 3 use of electro 9 electric igniter 11 to ignite the gas-generating checkers 12, the combustion of which generates a pulse of high pressure and temperature in the zone of location of the device in the well.
When using the device implemented method thermogasodynamics gap productive formation in vertical, directional and horizontal wells. The device is installed within the target interval. In accordance with the principle of creating a cyclical effect on the producing formation by successive descent tank of gas generator in the interval of the productive formation by increasing the mass of the charge for impact is in managed mode, providing the greatest concentration of thermodynamic energy in the perforations through the casing hub and optimization of mass and length of the gas-generating charge to create pulse pressure is higher than the strength of rocks in order to disclose existing and formation of new fractures in the reservoir under natural retaining particles of destroyed rocks, with the subsequent formation of depression-repressional wave process in the infrasonic frequency range for involvement in the development of a deadlock (congestive) saturated areas, assessing the completeness of fracturing and localization intervals of crack formation on the amplitude, wave and temperature parameters thermogasodynamics process, registered standalone digital devices.
Appendix 1 shows the results of tests of the technology thermogasodynamics fracturing in the well "And". In this well conducted additional drilling interval hammer PAC-102 54 holes to ensure the total surface of the opening over 2100 cm2/m conducted control measurement of pressure and temperature in the well and tihtilova handling pressurized by the gas generator pressure gas-generating charge weight of 9, 15 and 21 kg of all cycles registered charts pressure and temperature in real time. For control measurements recorded pressure and temperature in the zone of the reservoir to thermoresistances the impact, components of 14.0 MPa and 35.7°C, respectively. When implementing tihtilova mode of exposure reported following parameters: 1 cycle (mass charge 9 kg) P=54 MPa, T=89,3°C.; 2nd cycle (mass charge 15 kg) P=61,3 MPa, T=90,87°C; 3 cycles (the mass of the charge 21 kg) P=71,6 MPa, T=To 107.8°C. the Recorded amplitude and temperature parameters, reflecting the dynamics thermogasodynamics process, used when processing the interpretation of the results. In the well fracturing clearly emerged only in the third cycle at a pressure of more than 70 MPa, time-decay of the wave process, which amounted to 30 C.
The results of field tests confirm significant superiority of technical and technological solutions of the claimed invention over the known analogues.
Sources of information
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10. RF patent №2105326 C1, 6 G01V 1/40, 3/18. Geophysical cable for the study of inclined and horizontal wells and method of the study of these wells. Korzhenevskogo A.G., Korzhenevskaya A.A. and other Appl. 20.01.97. Publ. 20.02.98. Bull. No. 5.
11. RF patent №2138834 C1, 6 G01V 1/40, 3/18. Geophysical cable (options) and method of the study wells. organische A.G., Korzhenevskogo A.A., Korzhenevskaya T.A. Appl. 25.12.98. Publ. 27.09.99. Bull. No. 27.
12. RF patent №2209450 C1, 7 G01V 1/52, 3/18, NV 7/18. Carrying geophysical cable (options) and the method of study of inclined and horizontal wells. Korzhenevskogo A.G., Korzhenevskaya A.A., Korzhenevskaya T.A. Appl. 14.01.2002. Publ. 27.07.2003. Bull. No. 21.
13. Deformation of rocks. Publishing house "Nedra", Moscow, 1966. 49-66.
14. Intensification of production of viscous oil from carbonate reservoirs. Authors: V.I. Kudinov, Knots BM Moscow, "NEDRA", 1994. S.
15. Invention No. 202822, CLA, 41, IPC E 21b, UDC 622.276 (088.8). Device for perforating and fracturing. B. Belyaev, E.M. Vicini, Upeelta, NR. Krylov and S.I. Nikolaev. Appl. 06.03.1962 (No. 767941/26-25). Publ. 28.09.1967. Bull. No. 20.
16. RF patent for the invention №2442887 C1 IPC EV 43/263. Device and method for gas dynamic gap reservoir to the development of hard stocks (options). Korzhenevskogo A.G., Korzhenevskaya A.A., Korzhenevskaya T.A., Korzhenevskaya A.A. Application 2010135814/03 from 30.08.2010, Published on 20.02.2012, bull. No. 5.
17. Prostredie and blasting operations in wells / Nchristian etc., M., Nedra. - 1972. P.132-135.
18. Field tests of the device and method according to the claimed invention. Annex 1.
1. Device for thermogasodynamics gap productive formation of oil and gas wells, including Geophysics is practical cable cable head and consisting of a remote control with gamma ray probe the instrument head, the sub, the box for the gas-generating charge and Autonomous registration unit, wherein the gas-generating charge high-energy solid propellant composition nematodirosis type checkers with an external diameter of 36-70 mm in length 300-1500 mm with an axial bore 5-28 mm with an electric igniter is installed in the housing with a diameter of 89 mm with a wall thickness of 9-11 mm and channels for the escape of gases measuring up to 70% of the cylindrical surface of the housing with end adapters with a diameter of 105 mm, fulfilling the role of hubs directional thermodynamic effects on the treated reservoir with the efficiency of dynamic effects, a multiple in excess of planar gas generators, with the rate of increase pressure in the combustion charge is not less than 100 MPa/s to achieve the maximum pressure is 3-4 times higher than the hydrostatic registration of dynamics of change of pressure and temperature standalone digital devices in real time with a resolution 8,0-10,0 thousand measurements per second, for the improvement of emergency to sustainability and promote the generator in a well with Zenith angles up to 90° and more applied geophysical cable multilayer structures with a diameter of 8-28 mm with a breaking strength of the 60-250 kN.
2. Device for thermogasodynamics gap productive formation of oil and gas wells, including geophysical cable cable head and consisting of a remote control with gamma ray sensor, the instrument head, the sub, the box for the gas-generating charge and Autonomous registration unit, wherein the gas-generating charge high-energy solid propellant composition nematodirosis type checkers with an external diameter of 36-55 mm in length 300-1500 mm with an axial channel with a diameter of 5-12 mm with an electric igniter is installed in the housing 73 mm diameter with a wall thickness of 5.5-8 mm and channels for the escape of gases measuring up to 70% of the cylindrical surface of the housing with the end adapters with a diameter of 82 mm, fulfilling the role of hubs directional thermodynamic effects on the treated reservoir with the efficiency of dynamic effects, a multiple in excess of planar gas generators, with the rate of increase of pressure in the combustion charge is not less than 100 MPa/s to achieve the maximum pressure is 3-4 times higher than the hydrostatic registration of dynamics of change of pressure and temperature standalone digital devices in real time with a resolution 8,0-10,0 thousand measurements per second, while for p is increasing emergency to sustainability and promote the generator in a well with Zenith angles up to 90° and more applied geophysical cable multilayer structures with a diameter of 8-28 mm with a breaking strength 60-250 kN.
3. The way thermogasodynamics gap productive formation of oil and gas wells with Zenith angles up to 90° and more, including the installation of a tank of gas generator on the logging cable in the interval of the reservoir, perforated, bringing the gas generator and the establishment of thermodynamic pulse, characterized in that assesses the quality of secondary drilling and, when the surface of the reservoir perforation channels less than 1000 cm2/m perforated interval is added to the cumulative perforation or sverlyaschie punches to ensure the surface of the reservoir up to 2000 cm2/m or more and cyclic effects on the producing formation by lowering of the body core in the desired interval on the logging cable with reference to the geological section of the gamma method for thermogasodynamics impact in a managed and controlled manner with the greatest energy concentration and temperature in the perforated zone in the optimization of mass and length of the gas-generating charge for creating a pressure impulse in 1.5-3 times higher than the pressure of the fracturing order disclosure of existing and creation of new fractures in the reservoir under natural retaining particles destroyed th is Noah breed with the subsequent formation of depression-repressional wave process in the infrasonic frequency range to engage in the development of a deadlock (congestive) saturated areas, by documenting the process and assessing the completeness of fracturing on the decay time in the range of 10-40, 1-3 corresponding to the periods of the oscillations, and to reduce pressures up to 80% of maximum, localized intervals of crack formation on the recorded images, for which use of the device according to claims 1 and 2.
SUBSTANCE: heat source comprises a body, which is equipped with a composite material that generates gas during combustion and actuates from an electric spiral, and layers of epoxide compound and thiocol-based sealant sealing the ends of the material of the gas-generating composition. The composite material of the heat source that generates gas during combustion contains efficient amount 20 wt % of powdery polyvinyl chloride chlorinated resin of brand PSH-LS at the following ratio of composition components, wt %: granulated ammonium nitrate of grade B - 57.0±0.2; potassium bichromate - 3.0±0.1; aluminium powder of grade ASD-4 - 5.0±0.1; barium nitrate - 15.0±0.2; polyvinyl chloride resin of grade PSH-LS - 20.0±0.2. The gap produced in the outfit between sticks and the body of the heat source is filled with a filling solution capable of hardening. Between the igniter and the composite material the heat source comprises layers of additional igniting composition with the capability of its ignition from the igniter and ignition of the gas-generating composition at the end and along the surface of the heat source channel.
EFFECT: increased safety of operation, transportation and storage of a device for hydraulic rupture of a bed.
FIELD: oil and gas industry.
SUBSTANCE: method involves assembly of a pressure generator in the form of a group of cylindrical solid fuel charges with central through channels, lowering of the pressure generator to the well, installation of the pressure generator at the specified depth of the well, supply of a signal for ignition of charges and fracturing of the formation. In the existing casing string of the well, preliminary perforation density is performed as 30-45 holes per running metre, assembly of a pressure generator is performed out of three groups of solid fuel charges with location of charges of the first group below charges of the second and the third groups; the pressure generator is installed in the well above the perforation interval so that ratio of distance between upper perforation boundary and lower charge of the first group to length of perforation interval comprises the value of 0.3-0.6. The first group of charges has a charge with an igniter and total design weight of all charges, which provides the possibility of ignition of above located charges of the second group with the developed combustion surface and gas emission at combustion, which provides opening of existing vertical fractures in the formation and initiation of combustion of charges of the third group, which provide non-reversible deformation of mine rocks of the formation with creation of a residual vertical fracture.
EFFECT: improving filtration properties of the formation throughout its thickness.
FIELD: oil and gas industry.
SUBSTANCE: excess pressure is created in the well by acting on the formation with gaseous combustion products of frameless cylindrical solid-fuel charge having igniter, central round channel and solid-fuel segments projecting on opposite cylindrical surfaces parallel to axis of central channel, with longitudinal slots made in them for the rope of the assembly device, and the distance between slots, which is equal to outer diameter of cylindrical part of charge. According to the invention, excess pressure controlled as to amplitude and duration is created in the well without deformation and fracture of charge, which is caused with excess critical pressure of combustion products in cavity of its channel relative to the charge environment. It is achieved by installation opposite the formation or near the formation of charge with through central round channel having the ratio of channel length to its diameter, which is equal to (22-38):1. Increase in duration of action on formation at decreased pressure is achieved by attachment to that charge of additional cylindrical solid-fuel charge with similar projecting segments with slots and its length-to-diameter ratio equal to (5-15):1 with straight end faces or with a groove on the end face. At that, ignition of additional charge in the well is performed from igniter of lower charge with through channel or from igniters of charges with through channels, which are located from above or from below of additional charge. Current supply wires from geophysical cable to igniter are passed through the channel or longitudinal slots of segments of charge having a through channel, and longitudinal slots of segments of additional charge.
EFFECT: increasing treatment efficiency.
2 cl, 2 dwg
FIELD: oil and gas industry.
SUBSTANCE: method involves well perforation using a hollow-carrier perforator and further fracturing of formation using thermal gas generator, emission of gas during combustion of its fuel, which is supplied through the connecting assembly to perforator housing and directed jets acting on the formed perforation channels. As thermal gas generator fuel there used is mixed composition that is not detonable, which generates the gas during combustion with major content of chemical high-activity chlorhydric acid owing to which there created is chemical influence on the rock matrix and thus the sizes of channels and cracks are increased, walls of perforated channels are sealed and growth of filtration surface in productive formation is performed; at that, gas action on perforated channels in the formation is performed in the form of pulse pressures.
EFFECT: increasing formation perforation efficiency together with start-up in common perforator device and thermal gas generator, at combustion of fuel of which high-activity chlorhydric acid is formed.
2 cl, 4 dwg
FIELD: oil and gas production.
SUBSTANCE: proposed pressure generator is intended for encased shaped-charge perforators, implosion devices and powder generator devices arranged on cable and made up of integral tubular lining charge to be secured on device case of cable surface. Said charge is composed of fragments secured on device case or cable surface, arranged one after another. Note here that said fragments are made from rod elements of ballistic artillery powder shaped to uniform tubular structures by gluing outer side surfaces of powder elements by nitrocellulose size.
EFFECT: higher completeness of powder charge combustion and efficiency.
FIELD: oil and gas industry.
SUBSTANCE: powder channel pressure generator lowered to the well by means of geophysical cable consists of powder charges made in the form of cylinders with a central channel and with holes made in side surface of powder charge, which are connected between the cover and tray by means of a rope. In upper and lower powder charges there installed are glowing filaments electrically connected to geophysical cable. Holes made in side surface of powder charge are inclined towards geophysical cable, and angle between central axis of powder charge and axis of hole in side surface of powder charge is less than 90°.
EFFECT: improving efficiency of action on oil-water formations of solid fuel combustion products; improving installation accuracy of the device at the selected treatment interval; preventing the displacement of powder pressure generator after it is activated.
6 cl, 6 dwg
FIELD: oil and gas industry.
SUBSTANCE: gas generator includes the main solid fuel charge, ignition device in cylindrical housing with sealing assemblies in upper and lower parts and fixed piston in upper part of cylindrical housing with possibility of its being cut at the specified external pressure, and temperature promoter. According to the invention, lower end of tubing string is plugged with plate with central hole for installation of hydraulic connection of tubing string and ignition device located in lower part of gas generator. A tube connecting the tubing string to the top of ignition device is inserted into that hole. External perforated housing with solid fuel for combustion transfer to the main solid fuel charge is arranged in addition in ignition device connected to the main solid fuel charge by means of clutch coupling. Lower part of ignition device is plugged with solid fuel plate and cylindrical perforated limit switch.
EFFECT: thermal gas chemical treatment of wells with low flow rate and non-operating oil and gas wells.
3 cl, 1 tbl, 1 dwg
FIELD: oil and gas production.
SUBSTANCE: device is made in the form of implosive chamber. The role of a charge is performed by facing powder pressure generator made from elements of ballistite gun powder, located at the outer surface of implosive chamber casing with the possibility of approaching the wall of casing. There is the possibility of facing powder pressure generator ignition, generating of gaseous combustion products and pressure pulse with destruction - cracking of formation rocks in well bore zone and depressurisation of implosive chamber casing after pressure decrease till hydrostatical level. Note that there is provision of wave process of pressure fluctuations with the values of maximum and minimum pressure and duration providing further development of cracks in formation well bore zone.
EFFECT: possibility to develop pressure generator for oil and gas production intensification on the base of gun powder that is characterised by reduced charge mass and comparable to the existing more powerful samples of generators in efficiency.
FIELD: oil and gas industry.
SUBSTANCE: The invention relates to oil and gas industry, in particular, to methods and devices for intensifying well operation during the development of problematic reserves. The device for gas-hydrodynamic fracturing of productive formations in oil and gas wells includes a logging cable for descending the device and contains the device head and a load-bearing base in the form of metal rod where a gas-generation charge with a steam gauge unit is mounted. The gas-generating charge is a high-energy solid fuel non-detonating composition in the form of sticks with outer diameter of 36-110 mm, length of 500-1500 mm and axial channel diameter of 14-28 mm and an electric fuse. While the gas-generating charge is burning, the pressure increase rate of at least 100 MPa/sec is achieved with the maximum pressure being 2-4 times higher than the hydrostatic pressure. The pressure changing rate is measured with a self-contained digital steam gauge in real time with sensitivity of 7,0 - 10,0 thousand measurements per second. Furthermore, in order to reduce the accident rate and ensure that the gas generator movement in vertical and inclined wells with zenith angle up to 70°, a logging cable of multilayer composition is used with tensile strength of 120 - 160 kN and diameter equal to 12 - 18 mm.
EFFECT: increased efficiency of developing oil-containing zones with slow-moving oil.
4 cl, 3 dwg, 4 ex
FIELD: oil and gas industry.
SUBSTANCE: heat gas generator includes container, container suspension device in the well in the form of a pipe string, at least two gas-generating charges of solid fuel with various gas-generating capacity. Gas-generating charges are placed into the container in zones of radial holes distributed on side surface of the container. Besides, heat gas generator includes burning initiator of one of the solid fuel charges with lower gas-generating capacity, channel of burning transfer from one gas-generating charge to the other gas-generating charge with the specified burning time. Burning transfer channel has the possibility of preventing mutual penetration of combustion products. At that, length of burning transfer channel is 10-25% of the length of the preceding charge with lower gas-generating capacity and provides together with gas-generating charges a common mode of non-stationary action on well bore zone with the specified amplitude, time of action and rise of action power.
EFFECT: increasing operating efficiency of the device.
8 cl, 1 dwg
FIELD: oil and gas industry.
SUBSTANCE: perforator comprises a row of sections connected to each other. Each section comprises a frame, where shaped charges are placed, being joined with detonating cords, a unit of explosion initiation, units of detonation reception-transmission, placed in joints of adjacent sections, every of which is formed by elastic bushings coupled at the ends and placed on each end of the section, each having two adjacent parallel through channels. One of these channels is axial, and the other one is peripheral. Explosive cartridges are tightly placed in these channels - accordingly, axial and peripheral boosters, which interact with each other by the side surface. Interaction between axial boosters of adjacent sections is provided at their ends. At the same time each of free ends of axial and peripheral boosters at the side of shaped charges of each section interact with ends of detonating cords placed with a part into the axial and peripheral channels of the tightened elastic bushing.
EFFECT: increased reliability of actuation of a cumulative sectional perforator in the specified mode, increased safety of works.
13 cl, 3 dwg
FIELD: oil and gas industry.
SUBSTANCE: hydromechanical slot-type puncher consists of a body, an ejector-piston inside the body and a cutting unit underneath the ejector-piston; the latter includes retractable cutting tools with retraction mechanism in the form of a double-arm lever (balancing lever), cutting tools are installed in its arms and a correcting wedge installed under the balancing lever; at that balancing lever is mounted at a movable axis and it can rotate when its lower arm comes in a contact with correcting wedge in case of downwards movement of the ejector-piston. According to the invention the ejector-piston is made as a wedged piston; it can act on the upper arm of the double-arm lever that retracts the upper cutting tool thus creating opposite forces formed by the wedged piston and correcting wedge, which act on the upper and lower arms of the lever simultaneously. A version with enlarged cutting unit with more than two cutting tools is suggested.
EFFECT: uniform opening of the production string in at least two projections with guaranteed formation of equal high-quality slots.
6 cl, 2 dwg
FIELD: oil and gas industry.
SUBSTANCE: detonating fuse includes a housing with a reducer, inside which there arranged is a mechanical detonating device (MDD) based on a high explosive agent and a trigger mechanism including a housing and a shell and a stock, which are fixed relative to it, with possibility of moving the shell and releasing the stock when the detonating fuse is being activates; at that, between the trigger mechanism and MDD there additionally installed is an impact safety mechanism that is attached to them and that includes a housing, with a striker fixed in it, a slide made in the form of a shell enclosing the housing with the striker, and a spring arranged between the slide bottom and the striker, with possibility of the slide movement, compression of the spring and release of the striker at movement of the stock.
EFFECT: improving detonating fuse activation reliability.
SUBSTANCE: perforation system for well casing string comprising a hollow body with holes along its side surface, hollow plugs with bottoms fixed in body holes at the specified angles to the body axis. The body cavity is communicated with cavities of plugs and forms a single tight system with the medium of specified density. Jet charges are placed in the body. Each of these charges is aligned towards the appropriate hollow plug - along its axis. Hollow plugs, with their bottom part, protrude beyond the body dimensions by the value providing for alignment of this body in the casing string of the specified diameter and damage of plug bottoms in the operating position of the perforation system in the zone near the casing string and the focus distance of jet charges. At the same time the body has diameter and length providing for its longitudinal flexibility.
EFFECT: improved piercing capacity of a perforation system regardless of perforated casing string diameter and well curve.
14 cl, 1 dwg
FIELD: oil and gas industry.
SUBSTANCE: cumulative well perforator includes a frame with sockets and cumulative charges placed in sockets; each of them has a metal casing, metal cladding, main charge of explosive agent, detonation unit in the rear part of the main charge casing with two parallel grooves. In detonation unit there are two detonating cords that connect cumulative charges and axial socket with additional charge of explosive agent closed by one side of surface with axial part of the main part charge of explosive agent charge and by the opposite sides with detonating cords. Detonating cords along their length between cumulative charges are spaced from each other at the distance preventing reciprocal transmission of detonation. The detonation unit is capable of explosive wave damping at explosion of detonating cords in order to stabilise detonation front spreading along the main charge of explosive agent. Cumulative perforator has a sealed enclosure. Detonation unit is made of material with low sound speed. Detonation unit is made as a collar of elastic material.
EFFECT: invention allows improvement in reliability of complete actuation and efficiency of cumulative perforator operation due to optimisation of detonation circuit redundancy and increase of tunnel depth.
7 cl, 2 dwg
FIELD: oil and gas industry.
SUBSTANCE: device contains a case, wedge with grooves, at least two hydraulic motors placed one by one which have spring-loaded pistons and at least two cutters with hydraulic monitors and cutter holders installed in grooves of its support and wedge and capable of radial reciprocating movement. The case is formed by the wedge and walls of hydraulic motors which piston rods have axial channel connected by overflow channels with cavities under pistons and by tubes and channels of cutter holders with hydraulic monitors of cutters. Support of cutter holders is connected to piston rod which is loaded by a spring downwards in regard to the hydraulic motor.
EFFECT: improvement in efficiency of productive stratum treatment at reduction of metal consumption and material costs.
FIELD: oil and gas industry.
SUBSTANCE: device for treatment of bottomwhole formation zone contains an air chamber with atmosphere pressure and length of 20-50 m connected to the first additional perforated chamber with seal layer, solid heat generating compound A with flame igniter, combustible high-strength compound B and breakable calibrated membrane located inside; the first added perforated chamber by means of a coupling with holes is connected to the second added inlet chamber with combustible high-strength compound C, igniter and breakable calibrated membrane located inside; the second additional perforated chamber by means of a coupling with added air chamber with length of 1.5-3 m connected by means of a coupling and metal adapter with to inlet chamber that is made of elastic plastic material with seal layer, solid acid generating compound D with igniter located inside; in the metal adapter there are drilled holes; compound A generated heat and gas of the following components by wt %: ammonium nitrate 35; sodium bichromate 2; barium nitrate 15; aluminium ASD-1 1.5; iron-aluminium thermite 31; epoxide compound (mixture of ED-20 tar, EDOS plasticiser and AF-2M hardener) 15.5; compound B is made of the following components by wt %: ammonium nitrate 30-40, calcium carbonate 5-10, the above epoxide compound 50-65; inside the added inlet chamber there is a layer of glass sealant and solid gas generating compound E made of the following compounds by wt %: ammonium nitrate 70, sodium bichromate 1, the above epoxide compound 29; compound C is made of the same composition as compound B; compound D is made as thermal-gas-chemical solid fuel with a layer of glass sealant and a layer of epoxide compound on top of it; the above fuel consists of the following components by wt %: ammonium nitrate 12-16, lithium fluoride 1-3, barium nitrate 5-8, aluminium ASD-1 0.7-0.8, iron-aluminium thermite 14-16, hexachlorane 20-30, polytetrafluoroethylene 20-30, the above epoxide compound 5-10. The method for treatment of bottomhole zone (BHZ) includes delivery of the above device by a wireline, combustion of compound D and formation of maximum quantity of chemical agents, holding for the purpose of reaction of acids produced during combustion with BHZ formation, running with installation of the coupling with holes at the level of treated stratum, opening of the chamber with length of 20-50 m, actuation of breakable calibrated membrane in result of layer-by-layer combustion of compounds A and B with implosion treatment of BHZ, removal of impurities from bottomhole stratum; during holding thermal-gas-chemical impact acts on the stratum for 30 minutes ad pressure can be corrected due to availability of holes in the metal adapter at fixed position of the above fuel inside the inlet chamber due to the above layers of sealant and compound with formation of gases heated up to high temperatures at high pressure within treatment range; opening of the chamber with length of 1.5-3 m is carried out by sequential actuation of the igniter, compounds E and C and breakable calibrated membrane located in the second added inlet chamber; after hydraulic shock there's another holding of the process for 30 minutes; when the chamber with length of 20-50 m is opened combustion of compound A takes place with formation of gases heated up to high temperature at high pressure within treatment range.
EFFECT: increase of treatment efficiency for bottomhole formation.
2 cl, 2 ex, 1 dwg
FIELD: oil and gas industry.
SUBSTANCE: formation is drilled by means of a drilling perforator in the following way: lowering of the perforator using a cable with a cable end to the formation drilling interval in the well, subsequent drilling of channels in the well wall at each turn of the perforator; at that, the channels are drilled in the well wall from lower point to upper point of the drilling interval with the specified pitch of the perforator movement in vertical plane, and before each turn, the perforator is lifted to the surface; the perforator is turned by means of a turning gear to the specified angle, and its position is fixed relative to the cable end, then, the assembly is lowered to the well and the next channel is drilled, which is offset from the previous channel through the specified angle.
EFFECT: increasing the well drilling efficiency as a result of reticular perforation of the well wall throughout the drilling interval, simplification and cheapening of the devices performing that perforation.
2 cl, 7 dwg
FIELD: oil and gas industry.
SUBSTANCE: tube perforator consists of connected hydraulically forged housings, the upper ones of which are provided with axial channels for differential pistons, and the lower one of which is provided at least with one transverse channel for a radial impact piston with a puncheon. As per Version 1, perforator is equipped through a hinged connection by means of an inertia casing packer or an anchor operated due to the increase in speed of its lowering to pipe string filled with liquid. Inertia casing packer of the perforator consists of sealing, anchoring and resistive assemblies, and anchor consists only of anchoring and resistive assemblies. Anchoring assembly is made in the form of a cone and billets with a billet holder and connected from below to the resisting assembly in the form of inverted "U" or "V" shaped element, for example rubber or cuff, which has the possibility of increasing the resistance force on the perforator at its lowering speed rise so that lifting of billets above the cone till they are borne against the tube body can be provided. As per Version 2, radial impact piston and puncheon of the perforator are made as separate components and connected to each other by means of mating threads to make it possible to replace the used puncheon, and lower hydraulically forged housing is made as a solid part and provided with an external projection either on the side of radial impact piston with a replaceable puncheon, or on the opposite side of radial impact piston with a replaceable puncheon.
EFFECT: improving reliability and operating efficiency of the tube perforator in the well.
11 cl, 5 dwg
FIELD: oil and gas industry.
SUBSTANCE: device includes hydraulic motor and carriage with axial movement drive all located in cylindrical housing, at the carriage there mounted are hydraulic monitor and mechanism of exit cutting in cased borehole with end mill tool that has rotating drive from hydraulic motor and axial movement via hydraulic cylinder, mechanism of housing fixing in cased borehole, operating fluid supply line and hydraulic control system. Hydraulic monitor is mounted in unit that has, at least, one hydraulic monitor, and at the carriage diametrically relatively hydraulic monitor unit and exit cutting mechanism there additionally mounted are hydraulic monitor unit and exit cutting mechanism. Both exit cutting mechanisms are mounted in carriage guides and hydraulic cylinder of axial movement of their end mill tools is mounted on exit cutting mechanisms and is made two-piston. Drive shaft of hydraulic motor is kinematically connected to worm-and-worm gear, on the leading screw of which there is a carriage mounted via nut fixed on it, and to driving sprocket engaged by chain gearing through following sprocket with driving sprocket that is mounted on end mill tools spindles.
EFFECT: increasing of production rate at reduction of operation costs.
FIELD: oil and gas industry.
SUBSTANCE: plant involves a tubing string with a cylinder attached to it, a piston with end-to-end inner channel placed in the cylinder and a pressure valve installed at the lower end. In the cylinder walls there are radial windows than can be open at the upper point of the piston stroke. At the cylinder bottom there is a transmitter with possibility of reciprocative movement; it is connected to a waveguide mechanically. Radial windows are located at a smaller distance from the lower butt of the cylinder than the piston length.
EFFECT: improvement of overall performance due to loss reduction during impulse transmission to a productive formation with simultaneous pumping off.