Method for applying thermogas-dynamic action to bed and solid fuel charge for above method implementation

FIELD: oil production, particularly to stimulate bottomhole zone contaminated with paraffin, asphaltic resinous, salt, sludge and other deposits to increase oil output.

SUBSTANCE: method involves combusting solid fuel charges in well and creating successive excessive pressure pulses of gaseous combustion products. Solid fuel charges are combusted simultaneously with providing periodical stepped change in area and combustion temperature along with performing control of gas entering into well. This provides excessive pressure pulses which occur with frequency corresponding to time fractal processes of fatigue crack propagation in geological bed environment and creates pressure oscillations with 0.5-800 hertz frequency. The pressure oscillations act upon bed matrice material, as well as upon fluids and mud filling it.

EFFECT: increased efficiency due to increased coverage of elastic vibration application, reduced power inputs, creation of favorable conditions for nonreversible crack-propagation process and for providing purposeful triggering action.

24 cl, 4 dwg

 

The invention relates to the oil industry and can be used to stimulate the reservoir to improve oil recovery, and the impact on the bottom zone of the wells in dirty paraffin, wax, salt, sludge and other deposits with the aim of increasing the productivity of wells.

The known method termoliticheskogo impact on bottom-hole zone of the well and the reservoir, including the burning of solid propellant compositions and liquid fuel-oxidizer compositions without sealed chambers on the bottom hole (Patent RF №1480412, CL E 21 In 42/24). There is also known a method, implemented in the device for thermographically processing of the reservoir, including burning at the well bottom solid ballistic powders in vibration and/or pulsating combustion mode (RF Patent No. 2071556, CL E 21 In 43/26).

The effectiveness of the bottomhole zone treatment wells and stimulation with the use of these methods is small, as they do not provide favorable development of filtration channels and cracks in the thickness and the strike of the formation.

Closest to the proposed invention is a method of formation treatment, including, if the impact on the formation of gaseous combustion products, the creation of successive pulses redundant Yes the population with the amplitude and the duration of the first pulse, sufficient to reveal the natural cracks and creation of microcracks, amplitude and duration of the subsequent pulse is at least equal to the amplitude and duration of the first pulse (Patent No. 2106485, CL E 21 In 43/263).

The disadvantage of this method is the low efficiency of stimulation. During the creation of each single pulse of high pressure are observed only requirements for its duration and amplitude required for the development of single cracks passing through the most weakened, as a rule, the most permeable zone of the formation near the borehole, and are not optimal durations as loading and unloading required for the effective development of fatigue fracture process in the geological environment, leading to an effective propagation and along strike, and thickness. In addition, there are no conditions for the initiation of micro - and macropractice matrix of the geological environment on the system formed cracks and breaks. Not achieved useful changes the permeability zone of the formation (PPP) and not the conditions for favorable changes in stress fields and weights in the PPP and in the reservoir as a whole, which would not only increase the inflow to the borehole, but also to improve oil recovery.

Known charge bescorp the hydrated sectional for gothicrainbow stimulation - PGD BC, including the site of ignition, powder section, made of solid rocket fuel with the Central channel, the surface of which burning occurs (Fridlyander L.Y. and other Perforating-explosive equipment. The Handbook. M.: Nedra, 1990, pp.109-112). The known device does not allow end-burning powder sticks in the closed hollow body and the regulation of the release of gases into the well.

Closest to the invention to the technical essence is thermogenically charge described in the device for processing the PPP (RF Patent No. 2200832, CL E 21 In 43/25), including an igniter connected electric wires with ground control and thermographically source, placed in the hollow body, which may be made of interconnected cylindrical powder checkers. This charge allows you to adjust the output of the powder gases in the well, but does not provide periodic abrupt changes in the area of combustion and temperature during combustion.

The objective of the invention is to increase the effectiveness of the stimulation and the bottomhole zone by creating the most favorable conditions for the development of irreversible processes of crack formation in full of the geological environment of the reservoir and the maximum response of the reservoir is and trigger the effects of elastic vibrations, increasing coverage of the reservoir effect in reducing energy consumption, enhancing the capacity of the way and charge.

To solve the problem in the conventional method of processing the PPP, including the burning of solid propellant charges and creation in the borehole successive pulses of excessive pressure gaseous products of combustion, according to the invention in the process of burning solid propellant charges provide periodic abrupt change and temperature of burning solid propellant charges, thus regulate the escape of gases into the well to create simultaneously pulses of high getperiod combustion products into the reservoir with a repetition rate corresponding to the temporal fractal processes fatigue development of cracks in the geological environment of formation, and the elastic pressure fluctuations acting on the matrix structure layer, saturating his fluids and mudding.

The above distinctive features of the prototype characteristics of the proposed method determines when burning solid propellant charges getting a new mode of stimulation, which is manifested in the new effects irreversible changes in the permeability of the geological environment, to strengthen and create new effects by elastic oscillations associated with the use of the self-energy of the reservoir is, a sharp increase in the coverage of the layer thickness and along strike, initiating positive changes of the stress fields and weights, promote the flow of oil to the well and increase oil recovery.

To improve the effectiveness of exposure it is advisable to combustion in the borehole solid propellant charges to study the acoustic emission parameters processed geological environment of formation, the results of which to set the repetition rate of the generated pulses of high getperiod products of combustion in the formation.

Optimally the repetition rate of the generated pulses of high getperiod combustion products into the reservoir set in the range of 0.01-10 Hz.

To achieve maximum favorable changes in the permeability of the PPP and in General field saturation in the reservoir appropriate elastic pressure fluctuations create with frequencies corresponding to intensifitsirovany processes of heat and mass transfer in the reservoir and the maximum reduction of the effective viscosity of the saturating his fluids and mudding, for example, in the frequency range of 0.5 to 800 Hz.

To improve the effectiveness and impact of the elastic oscillations of the pressure it is possible to create simultaneously with different frequencies of regular and/or irregular.

When this elastic pressure fluctuations should be created with frequency and, which may be determined by the results of previously conducted on the cores of the reservoir laboratory studies of seepage phenomena of heat and mass transfer and research rheological behavior of fluids and mudding in the field of elastic waves.

Also for these purposes, elastic low-frequency pressure fluctuations should be created with the frequencies corresponding to the maximum development of dynamic adjustment of the matrix of the geological environment of formation at the micro - and macro-level structural hierarchy.

It is possible to combustion in the borehole solid propellant charges to conduct research microseismic response of the reservoir to vibro impact, the results of which determine the frequency elastic oscillations of the pressure.

Most effectively in the process of burning solid propellant charges abrupt phase changes in the area of combustion and temperature to perform with the increase of these parameters. To increase time and effectiveness, it is advisable to burning solid propellant charges between phases abrupt changes in the area of combustion and temperature to perform at a reduced speed. In these time intervals is provided by a reduced release of gases into the reservoir and is useful unloading of the geological environment of formation is t overpressure previous pulse high getperiod.

To achieve maximum depth of disclosure network of cracks is advisable in the initial and/or final stages of combustion, at least one phase of abrupt changes in the area of combustion and temperature to perform with sharply increased from the previous phases, the value changes of the above parameters.

To regulate the amount of introduction into the reservoir of the powder gases and the amplitude of the pulse pressure of the powder gases to the combustion of the solid fuel charge tube space well above the depth of the equipment it is advisable to acerbate and/or to produce sealing the wellhead valve device.

With the same purpose technologically expedient to burning solid propellant charge tube space well above deep equipment to fill a viscous fluid having non-Newtonian properties, for example an aqueous solution of polyacrylamide. In moments, a sharp increase in pressure also dramatically increases the resistance to movement of this fluid, and it acts as an effective "liquid packer", which increases the amplitude of the pressure pulses gasoperated into the well. In addition, decreases unproductive care powder gases up the column of the well.

To improve processing efficiency in extreme conditions of strong zagraznennaa the tee and low permeability of the PPP, it is expedient in the process of burning solid propellant charges to fill the tube space well above deep equipment foam. Foaming occurs when adding a foaming and instabilities substances in the area ozonation of water the powder gases in the tube space of the well. This increases the length of the spout and the amount flowing from the well fluid during processing, the time of the depression on the layer and its value, increases the depth of penetration of hot gases and the degree of purification of the PPP. Foaming and instabilities substances can be added directly into the fill hole liquid (water, oil) or delivered for slaughter using a deep well equipment.

In certain geological and physical conditions to improve processing efficiency can be up to burning solid propellant charge tube space of the well to fill with a solution of chemicals, such as acids, alkalis.

To increase the penetration of the formation and permeability of the PPP, it is expedient in the process of burning solid propellant charges into the reservoir crushing fuel compositions, such as suspensions or powders of alkali metals, generates heat as a result of chemical interaction with water or dilute acids. These compositions can be delivered downhole through deep well equipment in special containers, collapsing at the time of combustion of the solid propellant charge of the century

In certain conditions it is possible to implement the method in several consecutive stages of delivery and combustion of solid propellant charges at the well bottom. Delivery may be via cable or re-entry pipes. Thus between these stages may be conducted in the borehole additional operations, for example himreagent treatments. In addition, on the second or other subsequent delivery stage solid-propellant charges can be provided at the bottom hole optimal conditions, from the point of view of creation of such downhole pressure that combustion of the powder checkers and getting in the initial phase of abrupt changes in the area of combustion and temperature pulses of high getperiod combustion products into the reservoir, the amplitude of the pressure will exceed the pressure fracturing. At the first stage cleaning of the porous medium layer and the preliminary accumulation of microcracks and germ fracturing, and the second is the effective change of permeability with three-dimensional development of crack formation on the thickness and depth of the formation.

Extreme conditions for reservoirs with low permeability optimally to the combustion of the solid fuel charge to hold in the borehole additional perforation of the productive formation.

The problem is solved by the in known solid propellant charge for formation treatment consisting of interconnected cylindrical powder checkers placed in a hollow housing with an igniter connected to electric wires with ground control point, according to the invention the components of its powder checkers performed with an armored lateral surface to provide end layer-by-layer combustion of the powder composition, the data powder checkers made with the open end surfaces of the cylindrical protrusion at one end and a corresponding recess on the opposite end and collected in the hollow body into a single unit to contact the above projections-recesses, and the lower end of the hollow body is muted, and the top is equipped with a flow regulator of the powder gases.

To ensure optimal conditions end layer-by-layer combustion of the powder composition suitable components of the solid propellant charge powder checkers section between the recesses and protrusions to perform solid.

To regulate the amplitudes of the pulses increased getperiod possible with the end surface of the at least one solid powder checkers axis to perform additional deepening of the channel. For optimal combustion conditions, it is advisable from an additional deepening of the channel toward the side surface of the powder is ASKI to perform the gas channels.

To achieve maximum pulse amplitudes increased getperiod combustion products into the reservoir further deepening of the channel in the powder checker can perform end-to-end.

To increase exposure time and optimal conditions impact on the geological environment of formation suitable solid propellant charge to collect with alternating solid cylindrical powder checkers and draughts, made with additional recesses channels.

To ensure a sharp increase in getperiod in the initial and/or final stages of combustion suitable solid propellant charge to provide at least one additional cylindrical powder checker, made with an open side surface and with a continuous axial profiled channel. With one or more additional powder checkers can be accommodated in the hollow body when collecting solid propellant charge in its opposite from the end of the igniter and/or anywhere between joints powder checkers in compliance with the conditions of firing with end surfaces.

Optimally perform additional cylindrical powder checkers with the area of the side surface of the axial profiled channel is equal to the area of the open side.

As a flow control solid propellant charge is advisable to use the Laval nozzle.

For additional control possibilities of the release of gases into the reservoir, it is expedient in the hollow body of solid fuel charge to perform the waste valve.

In the proposed invention implemented new and more efficient mechanism of action of saturated geological environment as the bottomhole formation zone, and the depth of the formation associated with irreversible volumetric cracking, rearrangement of the structural matrix of the rocks under natural mountain stresses the emergence of new distribution gradients interstitial pressure and filtration fields, providing additional oil recovery.

As is known, the matrix of the geological environment has a block-fractal structure. Distribution blocks, as the distribution of breaks in the continuity, cracks obeys fractal laws, and the rock forms a nested into each other similar fractal hierarchy structures from micro to macro. Elastic vibrations and pulses have a very significant impact on the behavior of geomaterials under mechanical stress, affecting plasticity, on the kinetics of accumulation of structural defects, micro - and microtrain and other processes. From the point of view, the most effective and profound impact on the reservoir is the most important to implement the trigger effect of the elastic is their fluctuations, which can occur when the impact elastic waves with relatively small amplitudes, many orders of magnitude less than the average level of stress in the rocks. The trigger mechanism of the effect is inextricably linked with block-fractal structure features of the geological environment, and the influence of small oscillations is "conceived" at the lowest micro levels of the structural hierarchy, speaking first in the accumulation of dilatonom, dislocations strength and embryos of microcracks, and the formation of microcracks accompany the processes defined by their "healing". The phenomenon is probabilistic in nature, and accidental appearance of a fairly large accumulation of violations - cluster process abruptly jumps to a higher level of structural hierarchy, and so on, until the development of microtrain in the environment. Development of micro - and microtrain accompanied by certain block progress and reconstruction of the matrix structure of the geological environment at different hierarchical levels and plays an important role here fluiconnecto environment, namely the saturation of fluids, which not only intensifies the processes of perestroika, but is a component of self-organization of the reservoir system, which is the result of triggering effects of elastic oscillations and leads to the emergence of new long-lasting what's interstitial pressure gradients and filtering.

Maximum development of the process of block shifts occurs by one or more close proximity to the levels of the structure and leads to the generation of a sufficiently powerful microseismic response of saturated fluid reservoir in a narrow low frequency range.

Using known methods of dynamical systems theory to study the amplitude-frequency spectra of acoustic emission (AE) and microseismic response, you can get the dimension of strange attractors and other fractal characteristics for optimal process control trigger effects to maximize the development of fractures and changes in filtration field in the layers.

In the known invention (prototype) process trigger exposure is not practically realized. The process of crack growth and development along the layer in the structure of the geological environment begin directly on its macro and implemented only near the well. The cracking takes place in the most weak and, as a rule, highly permeable portions of the reservoir interval, and the subsequent repetition of the pulse pressure leads only to minor branching and elongation of one or two microtrain. In addition, since the creation of micro-cracks for the formation of new filtration fields in the layers required adequately the wetting of the newly formed surface of the rock formation fluid, and the characteristic times of the processes of wetting and overall filtration processes (in particular for quite viscous structured fluids, with a noticeable content of asphaltenes, resins and waxes, as well as the presence of bridging agents) in a known invention is much greater than the characteristic times of the crack, after effects is the closure of the formed micro-cracks "dry" contacts and irreversible extensive fracturing does not occur. As a result, the effect has no significant positive impact neither on the characteristics of wastewater from wells or on the filtration field formation in General.

When implementing the proposed invention generate pulses of high getperiod combustion products into the reservoir with a repetition rate corresponding to the temporal fractal processes fatigue development of cracks. This frequency is determined, for example, the delay time of the reaction medium on the trigger effect and other fractal parameters. The process of crack formation starts with the lowest micronova the structural hierarchy of the environment, at low pulse amplitudes increased getperiod, and leads to an extensive system of micro - and microtrain full environment of the reservoir near the well, and in the distant depth zones of the formation.

Optimally the pressure fluctuations to create frequencies where the effects of intensifitsirovany processes of heat and mass transfer in the reservoir and reduce the effective viscosity of the saturating his fluids and mudding occur with a minimum of vibrational energy, for example, in the frequency range of 0.5 to 800 Hz. This also slightly attenuation of elastic waves in layered medium.

The choice of frequency of impact from the range in specific geological and physical setting can be made according to the results of previously conducted on the cores of the reservoir laboratory studies of seepage phenomena of heat and mass transfer and research rheological behavior of fluids and mudding in the field of elastic waves. You can also make impact with frequencies that are determined by the spectra of the microseismic response. The processes of reorganization of the matrix and unloading occur at lower voltages and concentrations of cracks, cover a larger area near stress concentrators on the depth of the formation.

Things the government increased the depth trigger stimulation of elastic oscillations in the implementation of the present invention is caused by the fact, the processes of crack formation and rearrangement of the matrix, saturated hydrocarbon fluid environment of the reservoir, are inextricably linked with relatively short, but powerful process of degassing of the fluid of high pressure on the newly formed system void of microcracks, which is intermittent on the principle of resonance and synchronization in General determines the high energy and lavinoopasnost process response of the reservoir, causes the recharge energy of elastic waves due to the potential energy of the discharge of the geological environment of formation. In this case the propagation of elastic waves through the formation of their amplitude will decrease slightly, and in certain circumstances even to grow.

Thus, when the combination of the characteristics of the present invention fully implemented process trigger the formation stimulation, which leads to significant long-term improvements of the filtration characteristics of wells positive changes in stress fields and the interstitial pressure in the reservoir, involvement in filtration flow of fluids from a previously stagnant saturated dimensional areas and local areas of the reservoir, increasing the coverage of the formation exposed in the thickness and depth, increasing oil recovery from the reservoir.

The proposed solid propellant charge allows you to create combustion of the pulse is LSI high getperiod combustion products into the reservoir with a given repetition rate. The signs provide the opportunity for face layer-by-layer combustion with reduced speed and the possibility of an abrupt increase in the area and burning speed when moving region of the end burning in the seam zone separate solid solid cylindrical pieces, sharp abrupt increase getperiod and pressure. The pulse frequency is adjusted by changing the chemical composition of the solid fuel charge and the length of his checkers. The location of the powder sticks in the hollow body solid propellant charge allows you to regulate the escape of gases into the well flow regulator and, in addition to periodically following pulses of high getperiod, to create in the borehole elastic vibrations that are transmitted into the formation.

In Fig. 1 shows a solid propellant charge to implement the method in the optimal variant of its execution.

Solid propellant charge consists of a hollow body 1, a cylindrical powder checkers 2 with an armored lateral surface 3, the projections 4 and recesses 5, as well as from the igniter 6, and placed in the upper end of the solid fuel charge flow regulator gases 7 made in the particular case in the form of a Laval nozzle. In the collection of solid propellant charge used by the alternation of solid powder of checkers and draughts with additional axial recesses, channels 8 provided with gas channels 9. Body solid-fuel charge is supplied waste valve 10.

In Fig. 2. shows a cross section of an additional cylindrical powder checkers, made with an open side surface and with a continuous axial profiled channel.

The method of thermodynamic stimulation using the proposed solid-fuel charge is as follows. To accommodate the solid fuel charge and lowering it into the well may, for example, be used downhole equipment design "NPP oil Engineering (Patent RF №2200832, CL E 21 In 43/25, 2003), which includes serially connected control unit getperiod in the borehole 11 with slots 12, the cavity 13 from the cable head 14 (Fig. 3). Case 1 solid propellant charge is connected to the node 11 of this device with the wiring electric wires 15 from the igniter charge 6 to the cable head 14 and on wireline immersed in a fluid-filled borehole. Exit slits 12 are set at the level of the lower holes of the perforated interval. With the ground control panel serves voltage electrical wires 15 to the igniter 6, which is heated to a temperature above the ignition temperature of the solid fuel charge and ignites it on top of the housing 1. The resulting high-pressure gas and the temperature goes black is C the Laval nozzle 7, the node 11, extends through slots 12 in the column space of the borehole and further extends up from the bottom perforations along the productive interval and is introduced into the reservoir. In the process of combustion of solid fuel charge is end layer-by-layer burning powder checkers with a reduced speed. When you approach the field of combustion to the joint checkers abruptly increases combustion space, its speed and the pressure in the housing 1. At the same time increases the rate of gas flow in the critical cross-section of the Laval nozzle 7, the mode expires, goes supersonic with the generation of shock pressure fluctuations. In this phase combustion in the borehole enters the pulse pressure increased getperiod, and in the gas flow generated elastic vibrations that are transmitted into the formation. After passing the region of the combustion space of the joint checkers combustion space and its velocity is again reduced, the pressure in the housing 1 falls, decrease getperiod in the hole and unloaded to the environment of the reservoir. It also disappears supersonic mode expired gases through the Laval nozzle 7 and the generation of elastic waves. Considered an abrupt change of the combustion mode is periodically repeated in the burning of a solid propellant charge in the passage region of the end burning through the joints of the powder sticks. The square pulse butt combustion m who should regulate the implementation of the additional recesses, channels 8 (Fig. 1) with the end surfaces of the sticks. In the result, it is possible to regulate the amplitude of the pulses generated in the borehole pressure increased getperiod. The pulse frequency is increased getperiod depends on the speed of combustion of the powder composition of sticks and their length. By varying these parameters it can be easily adjusted. The frequency of the generated elastic waves is varied by changing the parameters of the Laval nozzle 7, other geometric parameters.

Extreme conditions of low permeability formation, the method can be carried out in several stages of delivery and combustion of solid propellant charges, in this case, for example, in the second stage, after burning the first Assembly powder checkers and lifting equipment can be delivered to the bottom hole in the hollow cartridge case Assembly with additional powder checkers with an open side surface and with a continuous axial profiled channel, placed at the beginning of the charge after the igniter. Next injected into the well fluid can be created in the bottom hole of the optimal pressure, the need to place on the productive interval indicates that a chemical such as acid, to set the packer and/or sealing the wellhead valve device. When ignited solid propellant charge is in the stage of burning more powder sticks in the reservoir creates pulses of high getperiod combustion products, the pressure which exceeds the pressure of the fracturing. The implementation of fracturing after pre-processing at the first stage under the simultaneous effect of elastic oscillations leads to effective and irreversible development of fractures in the thickness and depth of the formation.

Before lowering the device into the well in her carry out studies of the amplitude-frequency spectra of acoustic emission, for example, using a hardware-software complex "SPE oil-Engineering". Using special software, available from the authors present invention, the analysis of the obtained spectra of AE and determined the optimal pulse frequency of excessive pressure high getperiod into the well, which is specified when implementing method.

We show the possibility of application of thermodynamic method for stimulation and solid-fuel charge on a practical example.

In the production well rises underground equipment (if necessary pre-killing) and produced the preparatory work (sweeping-up, cleaning of the wellbore and downhole and others). Are necessary geophysical and hydrodynamic studies. Using a hardware-software complex "SPE oil-Engineering are recording the amplitude-frequency spectra of natural and induced seismic emission. The analysis of the obtained spectra of the AE and the computer program determines the optimum repetition frequency of pressure pulses fopt=0.02 Hz.

In the stopped operating the well, filled with a solution of calcium chloride density of 1.16 g/cm3on the wireline is lowered to the depth of the lower edge of the perforation interval 1320 m assembled downhole device design LLC "NPP oil-Engineering". As a solid propellant charge body 1 devices use multiple Assembly of the pieces of the composition of the PCT-4K on OST 1384-439-82. This charge has the following performance characteristics: diameter (with armor) 71 mm, length 9.7 m, weight 56,6 kg, the heat of combustion of 860-890 kcal/cm3the burning rate of 20 mm/sec at a pressure of 20 MPa and a temperature of 20°s, the amount of outgassing 850 DM3kg, reduced to a temperature of 20°and the pressure of 0.1 MPa, the temperature of the combustion 2400-C, sensitivity to friction 18 class, it hit 0% explosion flash point 169-171°C. the start-up Current solid propellant charge is 2.0 A. the Solid propellant charge is collected in the pump-compressor pipe 3" with an inner diameter of 76 mm In extreme conditions when creating pulses of getperiod high power hollow body solid fuel charge it is advisable to make of thick-walled tubes, such as can be and is used in the case of drills or drill pipe. In other cases, the technological use of standard tubing.

Before descending into the well device with a solid propellant charge regulate and adjust on the above data.

After preparing the well to the processing serves the voltage on a wire spiral, and the charge is ignited. In the well received powder gases. Combustion of the charge generated periodic pulses of high getperiod into the reservoir with the repetition rate of the order of 0.017 Hz and generates the elastic oscillations with two frequencies of 0.7 and 81,4 Hz. The combustion of the charge lasts 8 minutes. In Fig. 4 presents instrumental recording pulse pressure getperiod and variations in pressure at the well bottom during combustion of the charge. If necessary to increase the burning time of up to 20-30 minutes increase the length of the charge, which is collected in two or more tubing strings. At the end of the burning process has completed, and the processing device on the cable pull to the surface. Well pass for carrying out finishing works: flushing of the face and research.

The implementation of the claimed technical solution allows targeted trigger impact on the PPP and layer, to improve the processing efficiency by 2-5 times, to extend the scope of geological and physical conditions is m and the performance of reservoirs and wells, to help solve the problem of disposal of stocks of rocket fuel.

1. The method of thermodynamic stimulation, including the burning of solid propellant charges and creation in the borehole successive pulses of excessive pressure gaseous products of combustion, characterized in that in the process of burning solid propellant charges provide periodic abrupt area change and the temperature of combustion, thus regulate the escape of gases into the borehole to create and simultaneously pulses of excessive pressure gaseous combustion products into the reservoir with a repetition rate corresponding to the temporal fractal processes fatigue development of cracks in the geological environment of formation, and the elastic pressure fluctuations with a frequency of 0.5 to 800 Hz, acting on the matrix structure of the reservoir and saturating his fluids and mudding.

2. The method according to claim 1, characterized in that prior to combustion in the borehole solid propellant charges are conducting studies of acoustic emission parameters processed geological environment of formation, the results of which is determined by the repetition rate of the generated pulses of high getperiod products of combustion in the formation.

3. The method according to claims 1 and 2, characterized in that the repetition rate of the generated pulses of high getperiod combustion products into the reservoir sagaut the range of 0.01-10 Hz.

4. The method according to claim 1, characterized in that the elastic oscillations of the pressure created at the same time with different frequencies of regular and/or irregular.

5. The method according to any one of claims 1 to 4, characterized in that the elastic pressure fluctuations create with frequencies corresponding to the maximum development of dynamic adjustment of the matrix of the geological environment of formation at the micro - and macro-level structural hierarchy.

6. The method according to any one of claims 1 to 5, characterized in that the elastic pressure fluctuations create with frequencies that are determined according to the results of previously conducted on the cores of the reservoir laboratory studies of seepage phenomena of heat and mass transfer and research rheological behavior of fluids and mudding in the field of elastic waves.

7. The method according to any one of claims 1 to 6, characterized in that prior to combustion in the borehole solid propellant charges are conducting studies of the microseismic response of the reservoir to vibro impact, the results of which determine the frequency elastic oscillations of the pressure.

8. The method according to any one of claims 1 to 7, characterized in that in the process of burning solid propellant charges abrupt phase changes in the area of combustion and temperature is performed with the increase of these parameters, the process of burning solid propellant charges between the phase jump is modify the area of combustion and temperature mainly carried out with a reduced speed.

9. The method according to any one of claims 1 to 8, characterized in that the initial and/or final stages of combustion, at least one phase of abrupt changes in the area of combustion and temperature is performed with sharply increased from the previous phase value changes of the above parameters.

10. The method according to any one of claims 1 to 9, characterized in that prior to combustion of the solid fuel charge tube space well above deep equipment pokeroot and/or produce sealing the wellhead valve device.

11. The method according to any one of claims 1 to 10, characterized in that prior to combustion of the solid fuel charge tube space well above the depth of the equipment is filled with a viscous fluid having non-Newtonian properties, for example an aqueous solution of polyacrylamide.

12. The method according to any one of claims 1 to 11, characterized in that in the process of burning solid propellant charge tube space well above the depth of the equipment is filled with foam and/or a solution of chemicals, such as acids, alkalis.

13. The method according to any one of claims 1 to 12, characterized in that in the process of burning solid propellant charges into the reservoir crush fuel compositions, for example, suspensions or powders of alkali metals, generates heat as a result of chemical interaction with water or acidic solutions is so

14. The method according to any one of claims 1 to 13, characterized in that the propellant charge burns on the bottom of a well in several consecutive stages of their delivery.

15. The method according to any one of claims 1 to 14, characterized in that before the burning of solid propellant charges in the well spend additional perforation of the productive interval of the formation.

16. Solid propellant charge for thermodynamic stimulation, consisting of interconnected cylindrical powder checkers placed in a hollow housing with an igniter connected to electric wires with the ground control station, characterized in that the components of its powder checkers performed with an armored lateral surface to provide end layer-by-layer combustion of the powder composition, the data powder checkers made with the open end surfaces of the cylindrical protrusion at one end and a corresponding recess on the opposite end and collected in the hollow body into a single unit to contact the above projections-recesses, and the lower end of the hollow body is plugged, and the top is equipped with a flow regulator of the powder gases.

17. Solid propellant charge for thermodynamic stimulation on item 16, characterized in that the components of its powder checkers section between the recesses of the projections made a solid, with the end surface of the at least one solid powder checkers axis made an additional deepening of the channel.

18. Solid propellant charge for thermodynamic stimulation through 17, characterized in that further deepening of the channel toward the side surface of the powder checkers made the gas channels.

19. Solid propellant charge for thermodynamic stimulation according to any one of p and 18, characterized in that the further deepening of the channel in the powder checker performed end-to-end.

20. Solid propellant charge for thermodynamic stimulation according to any one of PP-19, characterized in that it is assembled with alternating solid powder of checkers and draughts, made with additional recesses channels.

21. Solid propellant charge for thermodynamic stimulation according to any one of p-20, characterized in that it is equipped with at least one additional cylindrical powder checker, made with an open side surface and with a continuous axial profiled channel.

22. Solid propellant charge for thermodynamic stimulation according to item 21, wherein the additional cylindrical powder checker made with the area of the lateral surface of the axial profileroland the second channel, equal to the area of the open side.

23. Solid propellant charge for thermodynamic stimulation according to any one of p-22, characterized in that the flow regulator used the Laval nozzle.

24. Solid propellant charge for thermodynamic stimulation according to any one of p-23, characterized in that in its hollow body is made of waste valve.



 

Same patents:

FIELD: oil production, particularly methods for stimulating oil production.

SUBSTANCE: method involves performing deep perforation through all intervals of formation to be treated; assembling sectional charge with central channel for tool set passage; lowering charge into well and combusting sections thereof formed of compositions providing charge burning in aqueous, oil-and-water and acid medium to form combustion products; increasing pressure and temperature inside the well; performing control of charge section burning in real time mode during fast combustion thereof; recording behavior characteristics of the charge and estimating the pattern of action exerted on the formation and bottomhole formation zone response to the action. Composite rod formed of material providing rod integrity during mechanical and heat load application during charge lowering/lifting and combustion process is used for charge assemblage. Composite rod has inner channel extending along central axis thereof adapted for passing power lead of ignition unit and wire with heat-resistant insulation connecting borehole cable with electronic unit adapted for controlling and recording behavior characteristics of the charge. Electronic unit is connected with lower part of lower rod and spaced a distance from charge sections. The distance is selected to prevent direct action of charge combustion products on the electronic unit. Besides, gas flow distributor is arranged between lower charge section and electronic unit to provide maximal directed action onto formation to be treated. Inner charge cavity is filled with surfactant for the full structure height to provide additional differential pressure drawdown and mechanical impurities removal as a result of surfactant foaming during charge burning. Perforation is performed through all formation intervals by means of perforator with 30-45° phasing so that vertically inclined spiral cracks around well bore in bottomhole zone are formed after charge combustion. The cracks are restricted from closing during following hydraulic fracturing and provide hydrodynamic communication between well and formation. For charge assemblage upper and lower rods connected to both ends of load-bearing rod part are used, wherein upper rod is lengthen up to 2.0-2.5 m, lower one is extended up to 1.0-1.5 m.

EFFECT: reduced accident risk, decreased thermal impact action on borehole cable, possibility of well normal operation after treatment thereof due to prevention of pump clogging with mechanical impurities and pyrobitumens during well operation starting and increased perfection of reservoir drilling-in.

2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes placing an explosive device in a well in working gas-liquid substance, occupying also the volume of well below perforator and above it at distance 10-300 meters. At upper mark of gas-liquid substance viscous-resilient liquid is placed with height of hydrostatic column 10-50 meters. Above viscous-resilient liquid main volume of gas-liquid substance is placed with relation of gas and liquid therein being less, than in working gas-liquid substance below viscous-resilient liquid. Density of main volume of gas-liquid environment is taken for calculation of forming of necessary depression in well shaft. With that depression, after gathering of structural viscosity by viscous-resilient liquid, explosion is performed.

EFFECT: higher efficiency.

14 cl, 1 ex

FIELD: oil-and-gas field development.

SUBSTANCE: method involves forming continuous disc-shaped slot in well by successive blasting gunpowder charges along with increasing power thereof in trinitrotoluol equivalent from explosion set to explosion set as slot length increases and strengthening the slot. The slot is formed so that aperture and radius thereof are related by analytical correlation.

EFFECT: increased ability of oil and gas extraction.

3 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes placement of deep operation body in perforation zone, capable of forming pressure pulses via remote initiation of gas mixture explosions. Depression of bed is performed by lowering liquid level in a well, forming a certain volume of explosive gas mixture in deep body, performing multiple effect on bed without raising of body until well product influx increases. Explosion pressure is set on basis of hydrostatic pressure of well liquid and volume of explosive gas mixture on basis of table provided in description.

EFFECT: higher efficiency.

1 tbl

FIELD: oil industry.

SUBSTANCE: method includes lower heat energy source and implosion chamber into well. Heat effect is applied and phase-explosive process is launched by opening implosion chamber. Implosion chamber is opened after reaching maximal temperature of well liquid at the very beginning of its decrease. Then phase-explosive process launch temperature is decreased. At second object method includes lower heat energy source and air implosion chamber into well. Heat effect is applied and phase-explosive process is launched by opening air implosion chamber. Air implosion chamber is positioned at distance from heat energy source, where well liquid temperature provides for launch of phase-explosive process, or air implosion chamber is opened with a delay. By these, excessive energetic potential of phase-explosive process is prevented with destruction of casing column and cement stone. Power of phase-explosive process is limited by use of air chamber under pressure.

EFFECT: higher efficiency.

2 cl

FIELD: mining industry.

SUBSTANCE: device has collapsible body of at least two portions. These are held relatively to one another, have a combined axial channel and together form a hermetic ring-shaped hollow. Therein a ring-shaped cumulative charge is placed with pressed explosive substance in metallic case in form of a torus, having outer ring-shaped recess. Opposite to the latter body is made with lesser thickness of outside wall. Body has at least one inner radial channel, connecting ring hollow to axial channel. In this axial channel a means for initiating ring-shaped cumulative charge through radial channel is positioned. Portions of body are mated by ends adjacently to each other and made with possible exclusion of strains from axial loads in zone of outer wall of decreased thickness under well conditions.

EFFECT: higher reliability and efficiency.

3 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes drilling long horizontal wells in bed and effecting on bed through them. Most of bed is covered by these wells. Along whole length of them explosive substance is placed to provide explosion temperature for length unit of well from 3500 to 1400 kcal/m and filling volume of horizontal wells by explosive substance from 5 to 20% during filling of remaining wells volume by liquid. After explosion, a packer is lowered into cased portion of wells.

EFFECT: higher efficiency.

3 cl, 1 tbl, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: according to accelerated variant, perforation of well-adjacent bed zone is performed by cased cumulative perforator. Adjustable pulse gas-dynamic bed fracturing is performed through apertures of perforator. It is provided with subsequent operation in given time of delay of main and additional gunpowder chambers. Thermal gas-chemical effect on well-adjacent zone of bed is provided for in given delay time of thermal gas-chemical chamber with charges. Implosion treatment is performed in given delay time of implosion chamber. Treatment is set by volume of implosion chamber and size of pass cross-section of flow aperture and/or group of apertures, connecting inner volumes of chambers.

EFFECT: higher efficiency.

12 cl, 3 dwg

The invention relates to the oil and gas industry, namely, devices for gap and thermographically processing of oil and gas reservoirs powder gases to improve hydrodynamic connection wells with reservoir

The invention relates to the oil industry and can be used to increase the efficiency of the secondary opening seams

FIELD: oil and gas extractive industry.

SUBSTANCE: according to accelerated variant, perforation of well-adjacent bed zone is performed by cased cumulative perforator. Adjustable pulse gas-dynamic bed fracturing is performed through apertures of perforator. It is provided with subsequent operation in given time of delay of main and additional gunpowder chambers. Thermal gas-chemical effect on well-adjacent zone of bed is provided for in given delay time of thermal gas-chemical chamber with charges. Implosion treatment is performed in given delay time of implosion chamber. Treatment is set by volume of implosion chamber and size of pass cross-section of flow aperture and/or group of apertures, connecting inner volumes of chambers.

EFFECT: higher efficiency.

12 cl, 3 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: method includes drilling long horizontal wells in bed and effecting on bed through them. Most of bed is covered by these wells. Along whole length of them explosive substance is placed to provide explosion temperature for length unit of well from 3500 to 1400 kcal/m and filling volume of horizontal wells by explosive substance from 5 to 20% during filling of remaining wells volume by liquid. After explosion, a packer is lowered into cased portion of wells.

EFFECT: higher efficiency.

3 cl, 1 tbl, 1 dwg

FIELD: mining industry.

SUBSTANCE: device has collapsible body of at least two portions. These are held relatively to one another, have a combined axial channel and together form a hermetic ring-shaped hollow. Therein a ring-shaped cumulative charge is placed with pressed explosive substance in metallic case in form of a torus, having outer ring-shaped recess. Opposite to the latter body is made with lesser thickness of outside wall. Body has at least one inner radial channel, connecting ring hollow to axial channel. In this axial channel a means for initiating ring-shaped cumulative charge through radial channel is positioned. Portions of body are mated by ends adjacently to each other and made with possible exclusion of strains from axial loads in zone of outer wall of decreased thickness under well conditions.

EFFECT: higher reliability and efficiency.

3 dwg

FIELD: oil industry.

SUBSTANCE: method includes lower heat energy source and implosion chamber into well. Heat effect is applied and phase-explosive process is launched by opening implosion chamber. Implosion chamber is opened after reaching maximal temperature of well liquid at the very beginning of its decrease. Then phase-explosive process launch temperature is decreased. At second object method includes lower heat energy source and air implosion chamber into well. Heat effect is applied and phase-explosive process is launched by opening air implosion chamber. Air implosion chamber is positioned at distance from heat energy source, where well liquid temperature provides for launch of phase-explosive process, or air implosion chamber is opened with a delay. By these, excessive energetic potential of phase-explosive process is prevented with destruction of casing column and cement stone. Power of phase-explosive process is limited by use of air chamber under pressure.

EFFECT: higher efficiency.

2 cl

FIELD: oil and gas industry.

SUBSTANCE: method includes placement of deep operation body in perforation zone, capable of forming pressure pulses via remote initiation of gas mixture explosions. Depression of bed is performed by lowering liquid level in a well, forming a certain volume of explosive gas mixture in deep body, performing multiple effect on bed without raising of body until well product influx increases. Explosion pressure is set on basis of hydrostatic pressure of well liquid and volume of explosive gas mixture on basis of table provided in description.

EFFECT: higher efficiency.

1 tbl

FIELD: oil-and-gas field development.

SUBSTANCE: method involves forming continuous disc-shaped slot in well by successive blasting gunpowder charges along with increasing power thereof in trinitrotoluol equivalent from explosion set to explosion set as slot length increases and strengthening the slot. The slot is formed so that aperture and radius thereof are related by analytical correlation.

EFFECT: increased ability of oil and gas extraction.

3 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes placing an explosive device in a well in working gas-liquid substance, occupying also the volume of well below perforator and above it at distance 10-300 meters. At upper mark of gas-liquid substance viscous-resilient liquid is placed with height of hydrostatic column 10-50 meters. Above viscous-resilient liquid main volume of gas-liquid substance is placed with relation of gas and liquid therein being less, than in working gas-liquid substance below viscous-resilient liquid. Density of main volume of gas-liquid environment is taken for calculation of forming of necessary depression in well shaft. With that depression, after gathering of structural viscosity by viscous-resilient liquid, explosion is performed.

EFFECT: higher efficiency.

14 cl, 1 ex

FIELD: oil production, particularly methods for stimulating oil production.

SUBSTANCE: method involves performing deep perforation through all intervals of formation to be treated; assembling sectional charge with central channel for tool set passage; lowering charge into well and combusting sections thereof formed of compositions providing charge burning in aqueous, oil-and-water and acid medium to form combustion products; increasing pressure and temperature inside the well; performing control of charge section burning in real time mode during fast combustion thereof; recording behavior characteristics of the charge and estimating the pattern of action exerted on the formation and bottomhole formation zone response to the action. Composite rod formed of material providing rod integrity during mechanical and heat load application during charge lowering/lifting and combustion process is used for charge assemblage. Composite rod has inner channel extending along central axis thereof adapted for passing power lead of ignition unit and wire with heat-resistant insulation connecting borehole cable with electronic unit adapted for controlling and recording behavior characteristics of the charge. Electronic unit is connected with lower part of lower rod and spaced a distance from charge sections. The distance is selected to prevent direct action of charge combustion products on the electronic unit. Besides, gas flow distributor is arranged between lower charge section and electronic unit to provide maximal directed action onto formation to be treated. Inner charge cavity is filled with surfactant for the full structure height to provide additional differential pressure drawdown and mechanical impurities removal as a result of surfactant foaming during charge burning. Perforation is performed through all formation intervals by means of perforator with 30-45° phasing so that vertically inclined spiral cracks around well bore in bottomhole zone are formed after charge combustion. The cracks are restricted from closing during following hydraulic fracturing and provide hydrodynamic communication between well and formation. For charge assemblage upper and lower rods connected to both ends of load-bearing rod part are used, wherein upper rod is lengthen up to 2.0-2.5 m, lower one is extended up to 1.0-1.5 m.

EFFECT: reduced accident risk, decreased thermal impact action on borehole cable, possibility of well normal operation after treatment thereof due to prevention of pump clogging with mechanical impurities and pyrobitumens during well operation starting and increased perfection of reservoir drilling-in.

2 dwg

FIELD: oil production, particularly to stimulate bottomhole zone contaminated with paraffin, asphaltic resinous, salt, sludge and other deposits to increase oil output.

SUBSTANCE: method involves combusting solid fuel charges in well and creating successive excessive pressure pulses of gaseous combustion products. Solid fuel charges are combusted simultaneously with providing periodical stepped change in area and combustion temperature along with performing control of gas entering into well. This provides excessive pressure pulses which occur with frequency corresponding to time fractal processes of fatigue crack propagation in geological bed environment and creates pressure oscillations with 0.5-800 hertz frequency. The pressure oscillations act upon bed matrice material, as well as upon fluids and mud filling it.

EFFECT: increased efficiency due to increased coverage of elastic vibration application, reduced power inputs, creation of favorable conditions for nonreversible crack-propagation process and for providing purposeful triggering action.

24 cl, 4 dwg

FIELD: oil production, particularly to penetrate oil formations characterized by low filtration characteristics.

SUBSTANCE: method involves applying gaseous medium pressure action to formation within productive zone interval, wherein the gaseous medium is obtained from reaction between oxidizing agent and fuel, which are self-ignited once brought into contact. The oxidizing agent is halogen fluoride or derivatives thereof or nitronium perchlorate. The fuel is formation fluid. Contact between the oxidizing agent and the formation fluid is provided by supplying the oxidizing agent into the formation in impulse mode. The oxidizing agent supplying is carried out in shots performed by gun or gas-jet perforator provided with bullet and oxidizing agent or with conical casing and oxidizing agent.

EFFECT: possibility to combine well perforation operation with crack forming (formation breakdown) operation and, as a result, increased ability of formation treatment.

4 cl, 2 tbl, 2 dwg

Up!