Method of productivity recovery and commissioning of non-operating oil and gas wells

FIELD: oil and gas industry.

SUBSTANCE: method includes the conducting of repair and insulating works, "moderate" perforation of the production casing by a power drill with the working member equipped with hydromonitor channels, injection of sealing composition into the punched holes, bridge installation inside the production casing and subsequent re-perforation and development of the productive formation. Meanwhile during a single tripping of the perforator "moderate" perforation of the production casing is made in the interval below the productive formation and above the water producing formation. A simultaneous sealing of the formed holes of the interval and the bridge installation inside the production casing by means of supply of cementing composition through the perforator are performed. The perforator is backwashed when it is lifted to the productive formation, which is re-perforated and developed by the same perforator.

EFFECT: saving of time and resources for the method implementation at the expense of execution of several actions in one tripping.

 

The invention relates to the oil and gas industry, namely, to restore the idle oil and gas wells with low reservoir properties (CFP) and closely spaced water-oil (KSS) or gas (GVK) contacts.

A well-known method of advanced drilling during the development of oil and gas fields, in which the drilling of wells, without waiting for the development of fisheries and supply to wells, pipelines, lateral production wells in the mining business. The hole is drilled, perforated production string, the call flow from the reservoir, after which the well is suppressed clay or salt solution and the corresponding density and is conserved in the waiting period of commissioning (up to several years, as, for example, at the Yamburg field in Western Siberia). Prolonged wells awaiting connection to the pipeline and fishery production under the influence of clay or salt solutions have a negative impact on the FES of reservoir rocks and productive characteristics of the well. Standard methods, for example by reducing the back pressure on the formation to learn well is impossible. In such cases, usually practiced re-opening of the productive formation by drilling sidetracks, fracturing the sludge is re-initial perforation of the perforated interval.

Known way to restore productivity and commissioning of idle oil and gas wells, including production of repair and insulation works, the opening of a productive layer in the casing and putting the well into operation [see Kustyshev A. C. and others Recovery of productivity idle oil and gas wells / Oil and gas: problems of natural resources management, production and transportation: proceedings of the scientific.-technology. Conf., dedicated to the 90th anniversary since the birth Century. And. Muravlenko. Tyumen, TSOGU, 2002, c.112].

The disadvantage of this method is that when restoring the productivity of idle wells with complex built by collectors and low FES by perforating the production casing cumulative punches high-power violation occurs integrity of the cement sheath behind a column - full or partial destruction, which leads to the emergence of cross-flows of water and gas.

Known way to restore productivity and commissioning of idle oil and gas wells, including production of repair and insulation works, the opening of a productive layer in the casing and putting the well into operation [RF Application 98116654 declared 04.09.98, publ. 20.06.2000. Bull. No. 17].

The disadvantage of this method is that when restoring productivity p is ostavaysia wells with complex built by collectors and low FES by drilling a second hole at the re-opening of the productive formation outside contamination wellbore zone (PPP) require large the cost of drilling a new hole with a low probability of its falling into the productive zone, especially in reservoirs with lenses and layers of rocks that have good enough THESS.

The closest solution adopted as a prototype, is a way to restore productivity and commissioning of idle oil and gas wells according to the patent of Russian Federation №2231630 declared 15.11.2002, publ. 27.06.2004.

The disadvantage of the prototype is that remedial cementing operations while limiting water production with subsequent perforation (reperforating) productive formation is carried out in several stages with the descent and ascent of the necessary equipment for each of the following stages. Step 1: produce a "gentle" perforated production string, for example, firing punches or abrasive jet perforation (GPP) in the interval obwodnica part of the productive formation below or KSS GVK 1-2 meters, and then lift the piping arrangement of tubing with a punch to the top. Step 2: lower the tubing to propertarianism interval and pumped through the newly formed perforations of water composition, forming waterproofing screen, pushing back the water into the reservoir, then raise the tubing. Step 3: again down the hammer and make a "gentle" perforated production string below the initial interval of perforation and above KSS or GVK 1-2 meters, then punch again extracted to the surface. Step 4: again down the tubing and pumped into the annulus through the newly formed hole above KSS or GVK sealing composition such as composition based on polyvinyl alcohol. Then pumped through tubing cement to prevent cross-flows of water and gas, setting the inside of the production casing cement bridge, newly formed overlying the perforations. Then raise the tubing. Step 5: installing the tubing perforator, the layout is again lowered into the well and produce re-opening of the productive formation by "sparing" perforation of the production string in the original perforation interval with a depth of perforations extending radially outside the contaminated zone, produce stimulation, testing and commissioning of wells in operation.

The task underlying the invention is to remedy these disadvantages and provide a reliable restore well productivity, preventing the flow of formation water to the face and the appearance of cross-flows of water and gas through the cement ring while reducing capital expenditures.

The technical result consists in accelerating the process carried out for one tripping operation, which saves BP is me, and material costs.

The technical result is achieved in that in the method of restoring the productivity and commissioning of idle oil and gas wells, including the repair and insulation works, "gentle" perforated production string below the reservoir, the injection of sealing compositions in the sprocket holes, the installation of the bridge inside the production casing and the subsequent reperforation and development of the reservoir, according to the invention "gentle" perforated production string produce hydraulic punch with a working body, equipped with a giant TV, in the interval below the productive formation and above the aquifer by pumping the sealant composition through the channels of the hammer and the placement of the bridge of the same composition inside of the production string, and the subsequent reperforation and the development of the productive formation is produced by the same punch.

These processes provide for one tripping operation of any type hydromechanical punch having a working body with the jetting channels.

The inventive method is as follows.

Mounted on the tubing string hydro-mechanical perforator, which is equipped with a working body with the jetting channels, forming a gap or open the e in the production string, for example, a slit or connectors hammer, down the hole and produce a "gentle" perforated production casing in the interval below obwodnica part of the productive formation and above the aquifer. In the formed perforation slits or holes through the jetting channels perforator pump sealing composition such as the composition of the quick setting cement mixture (BSTS), thereby blocking the screen, and mounted inside a casing of the same material bridge, formed overlying the perforations (slots), to prevent cross-flows of water and gas. Then raise the hammer to productive reservoir and produce backwash punch from the remnants of the sealing composition. At the end of leaching on the tubing is fed under pressure working fluid (acid, a hydrocarbon solvent, a surfactant, and so on) and make reperforation casing with a giant layer processing. After perforation of the productive formation involved in its development of the known ways, producing the call flow through the jetting channels of punch.

Thus, carry out the inventive method in one tripping operation, which saves time, material and energy the definition of costs.

The way to restore productivity and commissioning of idle oil and gas wells, including the repair and insulation works, "gentle" perforated production casing hydraulic punch with a working body, equipped with a giant TV, the injection of sealing compositions in the sprocket holes, the installation of the bridge inside the production casing and the subsequent reperforation and development of the reservoir, characterized in, that a tripping operation of the perforator produce mild perforated production casing in the interval below the productive formation and above the aquifer, carry out simultaneous sealing of the formed hole spacing and placement of the bridge inside the production string by filing a cement composition through the drill, produce backwash punch on its ascent to the productive formation, reperforation and development of which carry the same punch.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: method includes running in of a flexible coiled tubing, filling of the well with blocking fluid in the interval from the bottomhole up to the lower part of water influx closest to the bottomhole. Water-shutoff compound is injected and flushed to the producing formation with simultaneous running out of the flexible coiled tubing up to the upper part of water influx closest to the bottomhole. At that the rate of the well horizontal section should be several times more than the rate of the flexible coiled tubing movement in order to ensure even placement of water-shutoff compound in the producing formation. The well horizontal section is filled with blocking fluid up to the next water influx shutoff interval and isolation works are performed in sequence at each influx interval starting from the interval closest to the bottomhole. Upon isolation of the last water influx the well is closed under pressure for reaction of water shutoff elements and destruction of the blocking fluid. Thereafter the flexible tubing is run in up to the bottomhole and the well is washed in volume of at least 2 circulation cycles.

EFFECT: increased shutoff efficiency of brine water influx in horizontal wells both with cased bottomhole and open bottmhole with a slotted liner or without it.

6 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas industry, and namely to shutoff of stratal water influx in gas and gas condensate wells by means of coil tubing technique. The concept of the invention is as follows: the method lies in running in of a flexible pipe into inner cavity of gas-well production tubing up to the bottomhole and cleanout of the bottomhole from liquid and mechanical impurities, filling of the well with gas condensate, subsequent lifting of the flexible pipe up to tubing shoe, injection to the perforated interval through annular space between the flexible pipe and production tubing of the first package of hydrophobisated compound containing ethyl silicate ETC-40 with 10% concentration in gas condensate with volume of 1-2 m3 per each meter of gas net pay with its further flushing to the stratum and formation of water shutoff screen in the productive stratum thus pushing stratal water out from the bottomhole to the stratum depth radially. Then through annular space between the flexible pipe and production tubing injection of the second package of hydrophobisated compound is made containing ethyl silicate ETC-40 with 100% concentration in volume of 0.4-0.6 m3 per each meter of gas net pay with its further flushing to the stratum by gas condensate in the volume of production tubing and inner space of the well - production string below the tubing shoe. Then running in of a flexible pipe is repeated to the interval of gas-water contact, water-repellant organosilicon liquid GKZH-11N is injected through the flexible pipe in volume of 0.10-0.15 m3 per each meter of water-bearing thickness of the stratum, return washing of the well during 2 cycles with back pressure. The flexible pipe is removed from the well; the latter is withheld for reaction under pressure.

EFFECT: potential shutoff of stratal water influx without well killing operation and maintenance of gas net pay.

3 ex, 4 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method the well is killed, the sand plug is washed and hydraulic fracturing of the formation is made with its simultaneous setting within the whole perforation interval. Volume of the well bottomhole zone within the perforation interval is divided into two production facilities by injecting and flushing of waterproofing compound to the formation depth radially thus forming water shutoff screen. Time is withheld for hardening of the waterproofing compound. The well volume at the water shutoff screen level is divided into two production zones by setting a packer run in with the tubing string. The tubing string is equipped with a gas lift valve in the upper part of the upper facility perforation interval. The string shoe is set at the level of 1.5-2m below the lower openings in the lower facility perforation interval and water extraction is made by intrawell gaslift from the lower production facility due to gas energy from the upper production facility.

EFFECT: improved productivity of wells due to recovery of wet gas or gas condensate wells, prevention of their further drowning and self-killing, increased life between overhauls.

3 cl, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to downhole devices for instillation in the well bore in the underground area and methods of flow regulation in the well bore. Technical result lies in effective regulation of fluid flow. The downhole device for instillation in the well bore in the underground area contains the first fluid diode having the first inner surface limiting the first inner chamber and output of the first inner chamber, at that the first inner surface facilitates fluid swirling when it is directed to the output; and the second fluid diode having the second inner surface limiting the second inner chamber in fluid communication with the above output, moreover the second inner surface facilitates fluid swirling when the swirling fluid is received through the above output. In the method of flow regulation in the well bore in the underground area fluid is transferred through the first fluid diode and the second fluid diode through the channel between inner space of the downhole device and its outer space in the underground area.

EFFECT: while transferring fluid through the first and second fluid diodes fluid swirling is ensured in the first and second fluid diodes.

18 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: group of inventions is related to mining engineering and may be used for regulation of fluid inflow to the well. The system contains a flowing chamber through which a multicomponent fluid passes, at that this chamber contains at least one input, one output and at least one structure spirally located in regard to the output and thus facilitating helical swirling of the multicomponent fluid flow around the output. According to another version the system contains a flowing chamber with the output, at least one structure facilitating helical swirling of the multicomponent fluid flow around the output and at least one structure preventing redirection of the multicomponent fluid flow to radial trajectory passing towards the output.

EFFECT: prevention of gas cone and/or water cone formation around the well.

24 cl, 5 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to control over flow resistance in the well. Proposed device has the surface making the chamber and including lateral and opposite end surfaces. Note here that maximum distance between opposite end surfaces is smaller than maximum length of opposite end surfaces. It has first opening in one of end surfaces and second opening in said surface, isolated from first opening. Note here that lateral surface serves to swirl the flow from second opening to circulate around first opening.

EFFECT: higher efficiency of in-well fluid resistance adjustment.

27 cl, 11 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the first alternative a flow resistance control system includes a cyclone through which multicomponent fluid flows and the cyclone input is coupled to the cyclone chamber with at least two channels. Flow resistance of the multicomponent fluid passing through the cyclone depends on rotational intensity of the multicomponent fluid at the cyclone input. According to the second alternative a flow resistance control system includes the first cyclone with input and the second cyclone receiving the multicomponent fluid from the first cyclone input through the input coupled to a cyclone chamber with at least two channels. Flow resistance of the multicomponent fluid passing through the second cyclone depends on rotational intensity of the multicomponent fluid at the first cyclone input.

EFFECT: effective control of fluids flow.

10 cl, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes pumping and flushing of the polymer solution and well shutdown for the period of polymer gelling. According to the invention geophysical survey is made in order to specify the interval of water influx. Computational experiments are made on the basis of water influx isolation and limitation mathematical model thus evaluating stability of polymer screens for different viscosity and volume of polymer solutions in oil- and water-bearing areas of the productive stratum at the limit depression and depression in service, residual water and oil resistance factors for injected polymer solutions considering type of the productive stratum as well as water cut of the produced oil and its flow rate after insulation and limitation of water influx. At that viscosity of polymer solutions are evaluated in time at temperature of the productive stratum. Then the polymer is selected with required viscosity and volume of injection ensuring stability of the screen based on the above polymer in oil-bearing area of the productive stratum. The selected polymer solution is injected in the calculated volume.

EFFECT: increased efficiency of the method.

2 cl, 4 dwg, 1 tbl

FIELD: oil and gas industry.

SUBSTANCE: operation method for a well placed in oil-water contact zone contains the stages at which the well is perforated in the oil-containing area of the stratum and water-containing area of the stratum; dual product extraction is arranged from the oil-containing area and water-containing area of the stratum through the above perforation with the controlled rate; at that well production rate is controlled and equipment is selected for production on the basis of the certain ratio and periodically changed physical and chemical and reservoir properties.

EFFECT: improvement of efficiency and reliability for operation of wells placed in the oil-water contact zone.

3 cl, 3 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: in compliance with this method, well is shut in to open casing and linear gate valves for pumping highly mineralised water into annular space. Casing valve is closed to release excess pressure for pumping of highly mineralised water into seam in preset amount at 7.5-10.0 MPa. Pumping is stopped to close the well and to level the pressure for uniform distribution of highly mineralised water in the seam water-flooded zone. Well is started to run it to constant duty for up to 5 days. Well is operated at seam depression of 0.5-1.5 MPa. Volume of injected highly mineralised water is defined by analytical expression.

EFFECT: higher efficiency.

1 ex

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas industry, and namely to powder pressure generators and may be used to simulate oil and gas production. The concept of the invention is as follows: according to the method to the pre-killed well a flow string is run in with a loading hopper at the end. The loading hopper is made as a pipe section with inner cone, which least diameter is equal to inner diameter of the flow string and the largest diameter is less than minimum full bore. The packer is set and activates above the productive stratum and the loading hopper. Christmas tree gate valve is closed; a lubricator with powder pressure generator is installed above the gate valve. A logging cable is passed through a stuffing box installed above the lubricator. Thereafter the pressure-balancing valve is closed and the gate valve is open. Afterwards the powder pressure generator is run in to the well at the logging cable below the loading hopper to the interval of the productive stratum. Voltage is supplied through the logging cable to glowing filaments set in powder charges. Powder charges are ignited thus ensuring mechanical, thermal, physical and chemical impact on the productive stratum. Time delay is held upon treatment of the productive stratum. Then unburnt parts of the powder pressure generator are lifted at the logging cable through the loading hopper to the lubricator, the gate valve is closed, the pressure-balancing valve is open. Inside the lubricator pressure is balanced to the atmospheric pressure and then the lubricator is disconnected. At that the loading hopper is designed to protect the packer during powder charges burning, and the time delay upon treatment of the productive stratum shall be not less than five minutes.

EFFECT: increased efficiency of impact on the productive strata and blowout prevention of the produced product from the well.

3 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises development of non-equilibrium pressure and/or heat feed, and/or gas removal and that of formation fluid formed from hydrates, in gas hydrates occurrence zone. Note here that gas is cleaned and dried and fed to consumer. Besides, this process includes location of local heating source in well, if required. In compliance with this invention, decreased pressure are is created outside occurrence of gas hydrates, that is a phase separator with pressure of 0.3-0.5 of initial pressure in gas hydrate occurrence zone, and receiver with controlled valves. Extracted gas and formation fluid are forced into decreased pressure separator while heated dried gas is forced into gas hydrate occurrence zone. These jobs alternate to initiate heat pressure waves in gas hydrate occurrence zone rock to decrease local pressure therein.

EFFECT: higher efficiency.

6 cl, 1 ex, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method comprises drilling of parallel production and injection horizontal wells combined with multiple hydraulic fracturing of the seam. Note here that at least one production well is drilled in beds with permeability not over 2 mD. First, one horizontal well is drilled with angle between maximum major strain of the bed and direction of borehole making 30-60 degrees. Multiple hydrofrac is realised thereat. Well is put in operation. If bed pressure decreases by not over 3% a year then further development is performed under natural conditions with drilling the injection wells. Other production wells are drilled parallel with the first one in case the initial geological store of oil per one horizontal well makes at least 50 thou t at spacing between said wells not exceeding 100 m. Multiple hydrofrac is realised for all wells. Note here that the number of multiple hydrofrac stages is selected proceeding from analytic relationship.

EFFECT: higher yield owing higher coverage.

3 ex, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves pumping of working agent through injectors and recovery of the product through producers. The section is selected at the deposit with the following characteristics: remaining reserves of at least 3000 thousand t, reservoir pressure equal or less than initial reservoir pressure, water cut of the produced product within limits of 80-99% and injectability of injectors within limits of 40-140 m3/day at wellhead pressure of 4-15 MPa and permeability of at least 500 mD against results of hydrodynamic research. At this section an injector is selected with perforation interval according to hypsometric marks lying at the maximum height and at least 1 m above the perforation interval of the nearest producer. In the selected injector the injection volumes are limited up to values less than 50 m3/day. For the other injectors placed at 1 m below the perforation interval of the producer the injection volumes are increased per 5% in comparison with volumes injected earlier. In this mode injection is made within 3 months under control over changes in operation mode for producers by measurements of bottomhole pressure and water cut. Similar operations are made with other groups of wells for the selected section of development.

EFFECT: higher oil recovery of the deposit.

2 ex

FIELD: oil and gas industry.

SUBSTANCE: method involves pumping of working agent through injectors and recovery of products through producers. For the purpose of development a pool or a poll part is selected with formation pressure at least equal to the initial one, water cut of 60% and more and recoverable reserves of at least 40 thousand t. Then the post-event analysis is made for the selected section in regard to changes in dynamics of formation and bottomhole pressure and the least worked-out section with content of clay fraction of 2.5% and more. Upon the preformed analysis several design point of drilling for vertical inclined well are replaced by one injector with horizontal completion. The horizontal shaft is placed in the stratum with thickness of at least 3 m. The shaft is constructed at the border of the reservoir collector transition from clayey sandstone to aleurolite. Upon input of the horizontal injector into operation liquid is injected into the stratum under permanent control of changes in operation mode of the surrounding producers by means of bottomhole pressure measurement and product water cut. When bottomhole pressure rises up to the value sufficient to intensify product recovery operations on optimisation of subsurface pumping equipment are made to a bigger standard size. Upon the preformed analysis several design point of drilling for vertical inclined well are replaced by one producer with horizontal completion. The horizontal shaft is placed in the stratum with thickness of at least 3 m. The shaft is constructed at the border of the reservoir collector transition from clayey sandstone to aleurolite. Upon input of the horizontal producer into recover of reservoir liquid is made under permanent control of changes in operation mode of the surrounding producers by means of bottomhole pressure measurement and product water cut. When bottomhole pressure decreases per 10% below saturation pressure operations on injection increase are made through the affecting injectors.

EFFECT: improving oil recovery in the deposit with clayey collector.

2 cl, 2 ex

FIELD: oil and gas industry.

SUBSTANCE: cut-off system includes equipment of the well with at least one packer with or without return valve downstream connected to the cut-off landing nipple directly or through one or several tubes, and running in and out of an electric submersible pump unit at the pipe string. At that the cut-off valve consist of a lock, a case with input and output passing channels, sealing collars, a controlled element and a locking group. According to the invention the system is equipped with a hollow shank interconnected hydraulically from bellow to the cut-off controllable element and to the cavity of the pipe string over the electric submersible pump unit from the above. For this purpose the pipe string and hollow shank upstream and downstream the electric submersible pump unit are equipped respectively with axial and off-centre upper and lower couplings with taps interconnected by a hydraulic channel passing close to the electric submersible pump unit. At that the upper coupling has either a through axial channel or a through off-centre channel or a through axial landing channel. When the upper coupling is made with the landing axial channel then a divider for two cavities is run in at the additional pipe string of a less diameter with a side return valve. The lower coupling is connected hydraulically to remote measuring equipment. Besides the hollow shank with or without crossover unit is equipped with a disconnector with a running tool or without it. At that the cut-off valve is either run in to the well or set to the landing nipple before running in of the electric submersible pump unit or run in to the well at the running tool under the hollow shank and placed to the landing nipple. At that the disconnector under the hollow shank is connected to the disconnector or its controlled element or the landing nipple. The cut-off valve with a lock is equipped by a pressure adjuster and its sealing collars are set either lower or upper than the output passing channel. The case and controlled element of the cut-off valve form a working chamber connected through the hollow shank and hydraulic channel to the cavity of the pipe string or additional pipe string over the electric submersible pump unit. The controlled element is made as a piston or plunger or bellows capable of the locking group opening and closing at start-up and shutdown of the electric submersible pump unit or at the target generation or release of excess pressure in the additional pipe string or the pipe string. The closing group is made as a support saddle assembly and a gate or as a cylinder and a plunger gate. The piston or bellows or the gate is spring-loaded under the preset force. The cut-off valve is made with or without control mechanism to fix position of the controlled element rotated at the rod or in a case of a coded bushing with through or blind cam slots designed for the limiter in the case or at the rod respectively.

EFFECT: improving operational efficiency of the pumping well due to prevention of the productive stratum bullheading downstream the packer at replacement of the electric submersible pump unit.

3 cl, 21 dwg

FIELD: oil and gas industry.

SUBSTANCE: procedure for treatment of bottomhole zone of a producer includes filling in of the productive stratum interval with a solution for asphalt, resin and paraffin depositions with partial flushing to the well bottomhole. Vacuum and pulse simulation is carried out with simultaneous extraction of the reaction products. The interval of the productive stratum is filled in with hydrochloric acid solution, which is flushed partially to the well bottomhole. The process is withheld and vacuum and pulse simulation is carried out with simultaneous extraction of the reaction products. At that in one cycle of vacuum and pulse simulation about 0.01 m3 of liquid is pumped out. During vacuum and pulse simulation upon flushing of the solution for asphalt, resin and paraffin depositions quantity of pulses is increased 3-6 times more than upon flushing with hydrochloric acid solution, moreover volume of the reacted solution to be extracted is equal to the volume of the injected solution for asphalt, resin and paraffin depositions.

EFFECT: improving treatment efficiency of a bore-hole zone.

3 ex

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil producing industry and may be used successfully for development of oil and gas deposits with hard to recover reserves opening up both carbonate and terrigenous reservoirs, including oils of high viscosity. The concept of the invention is as follows: the method includes oil production from producers, injection of displacement agents to injectors, surveying of geological environment in productive strata and use of physical simulation techniques, registration and analysis of radiated emissions from geological environment both before and upon simulation. According to the invention spatial-temporal aggregate of simulation centres is defined by registration and analysis of time series of radiated emission signals from geological environment areas that cover fields with different fluid saturation, fracturing and stress as well as node areas of high instability within the square area and volume of strata. At that the aggregate is determined before simulation and corrected in its process. Analysis of radiation emission signals is made with consequential transformation of time span and determination of time differences in variation cycles of radiation emission intensity corresponding to fractal substructures of the environment ranging them from the smallest ones. Thereafter in the determined centres against the square area or volume the areas or time spans are specified from which or in compliance with which polyfrequency wave and/or pulse action is made simultaneously at two or more frequencies. At that data on oscillation frequency or pulsed frequency are specified with corrections in process of simulation against the above time differences determined in analysis process of radiation emissions.

EFFECT: improving efficiency of the development method due to simulation of strata by physical emissions thus providing effective oil influx to wells and expanding functionality of the method.

16 cl, 1 ex, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: proposed method consists in application of wave dilation technology. Note here that operation of pumping units in wells is synchronised, said units being equipped with wave dilation effects promoters. To ensure said synchronisation, downhole hardware is furnished with sensors for registration of elastic vibrations and channels for transmission of received signal to the surface at pumping unit operation control board. Note also that synchronisation of every pumping unit in the field is effected in frequency of signal generated pumping unit of master well.

EFFECT: higher efficiency of extraction and oil yield.

FIELD: physics, acoustics.

SUBSTANCE: invention relates to oil and gas industry and can be used on fields with different structural types, including depleted fields and fields with hard to recover reserves. Seismoacoustic investigations during oil extraction include a downhole acoustic radiator generating elastic vibrations in the form of a cylindrical wave horizontally directed into a formation; using seismic detectors mounted on the earth's surface on a profile to detect and measure amplitude-frequency parameters of longitudinal and transverse waves propagating through the formation, said waves being caused by deformation of rocks by elastic vibrations of the downhole acoustic radiator; simultaneously with the seismoacoustic investigations, using the elastic vibrations of the downhole acoustic radiator to create a pressure gradient for displacing oil and extracting oil.

EFFECT: high accuracy of seismoacoustic investigations and higher oil recovery factor.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: device for making perforation tunnels in a well which is installed at the casing string includes a body, a wedge with groove, a hydraulic cylinder and at least one operating device with jet tunnel placed at the support groove and the wedge with potential radial reciprocative movement. The wedge is installed above a piston of the hydraulic cylinder where the support of the operating device is fixed and the cavity below the piston is communicated by means of tubes with jet tunnel of the operating device and the cavity over the cavity of the operating fluid delivery.

EFFECT: manufacturing of small-size device that provides increase in reliability and efficiency of the productive formation processing with reduction of material costs.

4 dwg

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