Well yield control system

FIELD: oil and gas industry.

SUBSTANCE: system includes several tubular elements located in each other with the channels directing the fluid flows from different formations of the well to different channels of tubular elements fixed in the casing pipe by means of packers. Channels are equipped with spool-type gates with control electric drives providing separate movement of fluid flows from different formations through different channels by means of a processor and a fluid parameter measurement sensor installed in each channel and functionally connected to the automatic control processor of the valve in compliance with the information received from the sensor, and further selective mixing of flows in the area of the casing pipe. Tubular elements are fixed in the casing pipe with upper packer, and at their inlets, they are connected to the coupling directing different flows via different channels from different formations, which is connected via a central channel by means of the shank to the extracting device of the product from bottom formation of the well, which is fixed in the casing pipe with lower packer. Unit of separate supply and accounting is connected via a branch pipe to the electric drive of the submersible centrifugal pump, in which a communication cable is placed to control the valves from the electric feed and control cable, which attaches the pump electric drive to the well electric feed and control station.

EFFECT: increasing operating efficiency of the well formations.

3 cl, 1 dwg

 

The invention relates to the oil industry, in particular to systems of regulation of the flow rate, and can be used for dual use at least two layers of one well.

A known control system flow wells containing multiple tubular elements located within one another with the formation of at least one Central channel and at least two annular channels with flow direction from different layers in respective concentric channels, and valves arranged to control the flow in each channel. The valves are placed in the casing of the wellbore with the provision of separate movement flows through concentric channels and further selective mixing of streams of all channels in the column tubing. Each channel is associated with the valve with the actuator. In the Central channel directly above the valve installed tube, blocking the movement of the flow directly from the Central channel in the column tubing of the well. The system may further comprise at least one controller with a sensor for measuring at least one parameter of the extracted product, functionally related to each other, in what zmoznostjo automatic control, at least one valve in accordance with the information received from the sensor. The measured parameter may be selected from the group comprising pressure, temperature, chemical composition, water content, pH, solids content, the tendency to form a solid residue, and the resistivity. The system provides selective regulation of the flow rate of a large number of layers to mixing within the well by means of valves installed in the well, without complication and increase in surface and underground layouts (Patent RU №2320850 C2. Intelligent downhole valve control system removing fluids from multiple downhole intervals and the control method therefore removing fluids. - IPC E21B 34/06, E21B 43/14. - Publ. 27.03.2008). This system is adopted for the prototype.

A disadvantage of the known system of regulation of the flow rate adopted for the prototype, is the complexity of the design, reducing the efficiency of the management of dual operation of the well.

The main task, which is aimed by the invention, is the ability in real time to change the operation mode of each layer in the borehole and to track the actual changes of the parameters of the downhole fluid product, including pressure is e, temperature, chemical composition, water content, pH, solids content, the tendency to form a solid residue, and the resistivity.

The technical result is to increase the efficiency of dual completion wells with a reliable and optimal regulation of the phase composition of the fluid in real time.

This technical result is achieved by the fact that in the known system of regulation of the flow rate of the well, containing several tubular elements located within one another with the formation of the Central and annular channels of the flow direction of fluids from different reservoirs in different channels of the tubular element, the latter is fixed in the casing pipe of the well through the packer, and the channels are provided with valves control the flow of fluid from each channel with separate actuators connected to the control line, providing separate flows of fluids from different reservoirs through different channels using at least one processor and at least one measurement sensor parameter formation fluid, functionally associated with the processor to automatically control at least one valve in accordance with the information received from the at least one sensor, and further electoral efficient when blended the e fluid flow from all of the channels in accordance with the proposed technical solution, tubular elements of the Central and annular channels is fixed in the casing pipe of the upper packer and the inputs connected to the coupling direction separate threads on different channels from different layers, for which the coupling of the Central channel is connected via a shaft with zaborska product from the lower reservoir wells, fixed in the casing pipe of the lower packer, at the outlet of the tubular parts of the Central and annular channels made with a bell and a tightly coupled unit separate filing and recording of fluid in each of the channels via a docking station with adequate input channels, in the case of a separate unit of supply and metering of the fluid in each channel is installed with adjustable valves with electric actuators posted in separate channels, communicating with the Central and annular channels tubular elements through the shut-saddle adjustable valves and channels clutch cross flow and the docking station, while in the wall of each separate channel is made open to their messages with the cavity of the casing for further electoral mixing fluid flow from all channels, and the processor automatic control adjustable valve located in a separate filing and accounting, the latter, in turn, is connected by a pipe with electric submersible centrifugal the first pump, where the communication cable to control the processor from the power cable and control, connecting the electric pump with power and control wells;

it further comprises a telemetry unit, placed in the pipe between the drive pump and a separate unit of supply and metering of fluid in each of the channels connected to the power supply cable and control wells and cable communication with the processor automatic control adjustable valve;

as adjustable valves in separate channels of a separate unit of supply and metering of fluid in each of the channels is set spool valves with electric actuators.

Given the applicant an analysis of the level of technology has allowed to establish that the analogs are characterized by the sets of characteristics is identical for all features of the declared system of regulation of the flow rate of the well, no. Therefore, the claimed technical solution meets the condition of patentability "novelty".

Search results of known solutions in this field of technology in order to identify characteristics that match the distinctive features of the prototype of the characteristics of the proposed technical solution, showed that they do not follow explicitly from the prior art. Of certain of applicant's prior art is not revealed fame is iania provided the essential features of the proposed technical solution of transformations on the achievement of the technical result. Therefore, the claimed technical solution meets the condition of patentability "inventive step".

The following figure presents the layout of the system of regulation of the flow rate of the well, consisting of two layers.

In the lower part of the casing 1 well are two different productive reservoirs a and b, which are equipped with filters 2 and 3 and separated by packers 4 and 5. Inside the casing 1 posted by regulation of the flow rate of the well, containing the tubular elements 6 and 7 are placed one in the other with the formation of the Central channel 8 and the annular channel 9, secured in the casing pipe 1 through the upper packer 5. The inputs of the Central channel 8 and the annular channel 9 tubular elements 6 and 7 are connected to the Central channel 10 and the annular channel 11 of the coupling 12 for directing separate streams of fluids from reservoirs a and b in informing the channels 8 and 9 of the tubular elements 6 and 7. The clutch 12 is located in the casing pipe 1 above the level of the upper reservoir In the well and connected to the shank 13 with zaborska 14 fluid from the lower reservoir And well attached in the lower packer 4, communicating through the cavity of the shank 13 with a Central channel 10 of the coupling 12. To regulate the flow rate of the well, the casing pipe 1 is block 15 separate submission and consideration of formation fluid in each of the channels, which hermetics is connected with the socket ends of the tubular elements 6 and 7 through the docking station 16, made with adequate input elements with seals. In the housing 17 of the block 15 separate submission and consideration of formation fluid sensors 18 and 19 measuring formation fluid and spool valves 20 and 21 with the actuators 22 and 23, respectively, which are housed in separate channels 24 and 25, communicating with the Central and annular channels 8 and 9 through the shut-off saddles 26 and 27, the channels of the coupling 28 cross flow of fluids and the docking station 16. For each slide shutter 20 and 21 in the wall of each separate channel 24 and 25 are made of the window 29 and 30 for each separate message channel 24 and 25 with a cavity 31 in the casing pipe 1 for further selective mixing of fluid flow from reservoir a and B. In the casing pipe 1 is placed submersible centrifugal pump 32 with the actuator 33, which is connected with the column tubing 34. The actuators 22 and 23 Bolotnikova gates 20 and 21 are connected to the CPU 35 controls the actuators 22 and 23 Bolotnikova gates 20 and 21, located in 15 separate filing and recording of fluid, the latter, in turn, is connected by a pipe 36 with the actuator 33 submersible centrifugal pump 32, in which is placed the telemetry unit 37 connected to the CPU 35 controls the actuators 22 and 23 Bolotnikova gates 20 and 21 through the communication cable 38, is coupled to the cable 39 power and control, the last drive 33 submersible centrifugal pump 32 is connected with power supply and control system regulating the flow rate of the well located on the surface of the earth.

Regulation of the flow rate with two layers is as follows.

With this design the control system of the production of the well is installed in the casing 1 wells in two steps. First, you set packer system consisting of tubular elements 6 and 7, located within one another with the formation of the Central channel 8 and the annular channel 9, secured in the upper mechanical packer 5, connected to the coupling 12, the latter is connected to the shank 13 and zaborska 14 product from the lower reservoir And well attached in the lower mechanical packer 2, which is installed in the casing 1 in a single run of the column. After installation of the packer system assemble and descent composition consisting of block 15 separate filing and accounting, connected by a pipe 36 with the actuator 33 and a submersible centrifugal pump 32 connected to the power supply cable and control 39. The pipe 36 is placed telemetry unit 37 connected to the CPU 35 controls Bolotnikova gates 20 and 21, located in 15 separate supply and metering of fluids cable 38, which, in turn, with dynany with a power cable and control 39. The descent composition is produced together with a power cable and control 39 in the casing 1 completes its installation and hermetic fit in the socket ends of the tubular elements 6 and 7, the docking station 16 with seals on the response block elements 15 separate filing and recording of fluid in each of the channels. The actuator 33 submersible centrifugal pump 32 is connected by a power cable and control 39 item power supply and control system regulating the flow rate of the well located on the surface of the earth.

After installation of the system of regulation of the flow rate of the well casing pipe 1 in the latter are formed of different channels for diversion of products from different strata of the well. With the involvement of a submersible centrifugal pump 32 downhole fluid begins to separately flow into the casing 1. In combination provisions Bolotnikova gates 20 and 21, when the passage from the reservoir In the closed Bolotnikova shutter 21, Plast product coming from the reservoir And through the filter 2, rises up saborsko 14, bypassing the packer 4, the shank 13, the Central channel 10 of the coupling 12 and the Central channel 8 of the tubular element 6, bypassing the packer 5, then through the Central channel of the docking station 16, the locking saddle spool 26 of the bolt 20 and the cavity of a separate channel 24, then through the corresponding window 29 in the cavity 31 h is ne of the pipe 1. From the cavity 31, the flow of formation fluids absorbed submersible centrifugal pump 32, the latter fluid is pumped to the surface through the string of tubing 34. And when the combination of the provisions Bolotnikova gates 20 and 21, when the passage from the reservoir And closed Bolotnikova shutter 20, the layer of fluid flowing from the reservoir through the filter 3, climbs up on the ring channel 11 of the coupling 12 and the annular channel 9 formed between the tubular elements 6 and 7, bypassing the packer 5, the circular channel docking station 16, the locking saddle spool 27 of the shutter 21 and the cavity of a separate channel 25, then through the corresponding window 27 in the cavity 31 of the casing 1. From the cavity 31, the flow of formation fluids absorbed submersible centrifugal pump 32, the final product is pumped to the surface through the string of tubing 34. Thus there is a sampling of the first fluid from the reservoir And isolated from the reservoir or from the reservoir At in isolation from the reservoir And in complete isolation layers from each other regardless of the pressures in the reservoirs a and B. the ability of the system to operate in these modes allows you to explore each layer separately, i.e. to determine the flow rate, water content, etc. and to organize periodic pumping formation fluid from each reservoir with different settings for the different cycles, without stopping the operation of the entire well. During the combined provisions Bolotnikova gates 20 and 21, when the passages of the layers a and b gradually opened Bolotnikova gates 20 and 21, reservoir fluids from reservoirs a and b are received separately via different channels in complete isolation layers from each other regardless of formation pressure in the cavity 31 of the casing 1 for further electoral mixing in her fluid flow from all channels. From the cavity 31 mixed flow absorbed submersible centrifugal pump 32, the final product is pumped to the surface through the string of tubing 34. The communication cable 38 provides power to the sensors 18 and 19 and the control signals to the actuators 22 and 23 Bolotnikova gates 20 and 21 of block 15 separate filing and recording of fluid in each of the channels. Also on it in the reverse direction is transmitted to the telemetry unit 37 and the information on the degree of opening Bolotnikova gates 20 and 21.

Measured parameters of the downhole fluid may be controlled by ground maintenance personnel of the well or, at least, telemetry system, performing the change of operating state Bolotnikova gates 20 and 21 to establish the desired flow rate. It should also be noted that the regulation of the flow rate through the actuator 22 and 23 DL the each of Bolotnikova gates 20 and 21 allows you to create a pressure difference between the reservoir and thereby maintain the flow rate at an optimal level. Putting the control processor Bolotnikova gates 20 and 21 of block 15 separate supply and metering of fluids associated program, this process can be automated. The measured parameter may be selected from the group comprising pressure, temperature, chemical composition, water content, pH, solids content, the tendency to form a solid residue, and the resistivity.

The use of the proposed system of regulation of the flow rate will allow the selection of well fluid from each reservoir optimally that will significantly improve the efficiency of dual completion wells.

1. Regulation of the flow rate of the well, containing several tubular elements located within one another with the formation of the Central and annular channels of the flow direction of fluids from different reservoirs in different channels of the tubular element, the latter is fixed in the casing pipe of the well through the packer, and the channels are provided with valves control the flow of fluid from each channel with separate actuators connected to the control line, providing separate flows of fluids from different reservoirs through different channels using at least one processor and at least one sensor measuring plastic the second fluid, functionally associated with the processor to automatically control at least one valve in accordance with the information received from the at least one sensor, and further selective mixing of fluid flow from all channels, characterized in that the tubular elements of the Central and annular channels is fixed in the casing pipe of the upper packer and the inputs connected to the coupling direction separate threads on different channels from different layers, for which the coupling of the Central channel is connected via a shaft with zaborska product from the lower reservoir wells, fixed in the casing pipe of the lower packer, at the outlet of the tubular parts of the Central and annular channels made with a bell and a tightly coupled unit with a separate supply and metering of fluid in each of the channels via a docking station with adequate input channels, and in the case of a separate unit of supply and metering of fluid in each of the channels is set adjustable with valves placed in separate channels, communicating with the Central and annular channels tubular elements through the shut-saddle adjustable valves and channels clutch cross flow and the docking station, while in the wall of each separate channel is made open to their messages with the cavity of the casing trubilla further electoral mixing fluid flow from all channels the processor of the automatic control adjustable valve located in a separate filing and accounting, the latter, in turn, is connected by a pipe with electric submersible centrifugal pump, where the communication cable to control the processor from the power cable and control, connecting the electric pump with power and control wells.

2. The system according to claim 1, characterized in that it further comprises a telemetry unit, placed in the pipe between the drive pump and a separate unit of supply and metering of fluid in each of the channels connected to the power supply cable and control wells and cable communication with the processor automatically adjustable control valves.

3. The system according to claim 1, characterized in that the adjustable valves in separate channels of a separate unit of supply and metering of fluid in each of the channels is set spool valves with electric actuators.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: method includes blocking of a perforation interval by means of injection of a blocking liquid and its pushing with a killing fluid to a bottomhole and to a bottomhole area of a bed with simultaneous monitoring of pressure at a well head, gas relief and process settling. At the same time, prior to injection of the blocking fluid, a sand screen is formed by injection of a pulp of quartz sand with fraction of 0.6-1.2 mm in a carrier fluid in two portions with a flow rate of a carrier fluid, the value of which does not exceed the maximum permissible value, defined according to the formula. At the same time the volume of the quartz sand in the first portion of the pulp is calculated in accordance with the formula with further process settling of the well for the time determined according to the formula after injection of the first pulp portion. The volume of the quartz sand in the second pulp portion is taken as equal to the volume of suffosion channels produced in the sand screen. The blocking fluid is a certain composition. The blocking fluid volume is previously calculated according to the formula. Besides, at the moment of completion of blocking fluid pushing, hydrodynamic pressure is determined in a tubing string. Afterwards the process settling of the well is carried out. Further injection of the killing fluid into the well is carried out along the tubing string until it appears at the well head. At the same time the well head pressure is controlled in the annular space of the well by means of gas and blocking fluid relief, providing for pressure at the inlet to the tubing string as permanent and equal to the predetermined hydrodynamic pressure.

EFFECT: improved efficiency of gas well killing.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: design of low-angle and horizontal wells includes a technical string, an operating string and a lift string. The operating string is cemented above the productive formation roof. The operating string in the productive formation is divided into sections with casing packers, and sections include filter sections and sections of solid pipes. The lift string in the productive formation is equipped with operating packers, installed inside the sections of solid pipes of the operating string and groups of controlled valves equipped with calibrated inlet side holes arranged inside filter sections. A seat nipple is installed at the end of the lift string. Controlled valves and the nipple are made as capable of interaction with control devices lowered inside a lift string.

EFFECT: possibility to control an inflow from isolated sections of a low-angle or horizontal well shaft or their total selective water isolation.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: development method of heavy oil or bitumen deposit with control of well product extraction involves construction of upper injection and lower production wells with horizontal sections located one above another. At construction of wells their horizontal sections are equipped with filters installed opposite productive formation zones. Inside filter with non-perforated interval in production well there arranged is a shank provided with inlet holes dividing the filter into extraction zones. Besides, shank is equipped on the inner side with a stock with side channels. Inner space of stock is interconnected with inlet of pump lowered to production well on the tubing string with possibility of longitudinal movement of the tubing string together with pump and stock in the shank. Heat carrier is pumped through horizontal injection well with warming-up of the formation by creating the steam chamber, and product is extracted through horizontal production well. Thermograms of steam chamber are taken, the chamber's warm-up state is analysed for uniform heating and available temperature peaks, and considering the obtained thermograms, uniform heating of steam chamber is performed. Before the tubing is lowered to production well, first, stock is lowered with a shank concentrically arranged on it and fixed in transport position with a shear screw. Besides, on the outer side of the shank lower end there installed is heat-resistant packer; after the stock is lowered to production well, lower end of tubing is put on its upper end. Tubing is equipped with a pump. Tubing is lowered to production well till the packer is arranged at non-perforated interval of production well filter; after that, packer is installed by dividing the filter of production well into two extraction zones - initial and final. Uniform heating of steam chamber is performed by supplying the heat carrier through injection well. Penetration of heat carrier and/or formation water to the pump inlet is avoided by controlling the product extraction to the pump inlet from the initial extraction zone. Besides, product extraction volume is reduced in the initial extraction zone where temperature peaks occur. For that purpose, inlet shank holes corresponding to the initial extraction zone are made with reduction of carrying capacity from face to head, and side channels of stock are provided with possibility of alternating interaction with one of inlet shank hole in the initial extraction zone. This is performed by restricted longitudinal movement of pipe string together with pump and stock relative to shank by increasing or reducing the number of connection pipes on upper end of pipe string depending on the distance between inlet holes of the shank. Pipe string is fixed on the head of production well in the required position by means of a face plate on a supporting flange, and shank hole corresponding to the final extraction zone is made in the form of an open stock end.

EFFECT: improving the control of product extraction volume from extraction zones; simpler erection and lower metal consumption on the design.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method of fluid extraction from the well is performed in the following way: the first adjustment at least of the first well equipment for fluid production is performed; the first set of input parameters is chosen, which includes at least one parameter referring to serviceability degree at least of one second well equipment and sets of parameters chosen from the group including the data referring to efficiency, pressure, temperature, presence of the chosen reagent, content of water, content of sand and flow rate of injected chemical reagents. The first set of parameters is used to be entered to the computer model, and the second adjustment at least of one first well equipment is performed, which will provide at least extension at least of one second well equipment or increase in completed well flow rate. Also, control system of operation of electric submersible pump is proposed, which contains information storage data base relating to operating range of submersible pump, and processor for adjustment at least of one first well equipment, which has the possibility of using at least one measured operating parameter of submersible pump and information stored in the data base.

EFFECT: invention allows performing the monitoring of well shaft state and serviceability degree of various equipment and taking actions, which will provide increased or optimum production of hydrocarbons from the well.

25 cl, 4 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to production of natural gas ad may be used in methane-coal well development. Proposed method comprises perforation of operation string in interval of production bed and its hydraulic fracturing. Thereafter, operation string is flushed. Settled fluid level allows defining initial counter pressure on productive coal bed. Production tubing with borehole pump is lowered into flow tubing, the pump being located under perforation interval. Well head is sealed. Borehole pump is used to reduce fluid level in well annuity space to below perforation interval together with injection of buffer gas therein at initial counter pressure on the bed. Thereafter, feed of buffer gas is interrupted. Said fluid level in annuity space is maintained by means of borehole pump. Inflow of bed fluid is caused by releasing excess pressure of buffer gas from annuity space in control over variation in gas quantitative and/or qualitative composition at well head. Change in released buffer gas composition allows defining the beginning of coal methane from productive bed. Now, rate of buffer gas pressure release is decreased.

EFFECT: higher efficiency of well development.

4 cl

FIELD: oil and gas production.

SUBSTANCE: proposed method consists in using tubing incorporating borehole pump and packer. Note here that borehole pump is equipped with check valve. Check valve is arranged close to and above the pump on tubing outer side to allow one-way fluid flow from tubing into tube space. Said tube space is filled with process fluid with corrosion inhibitor in required concentration. Pressure in tube space is maintained not exceeding tolerable magnitude by means of electric-contact pressure gage connected to borehole pump control unit. Reagent if injected into tubing from wellhead with tube space gate valve.

EFFECT: efficient injection, safe production of oil or gas.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method of oil-gas wells killing on deep water subsea deposits by pumping of certain volume of kill composition together with sea water into the well thus providing creation of killing spout in the well with timeless pressure on formation exceeding formation pressure not less than 1.2 times, as a killing composition, preventing immediate contact of cold sea water with overheated formation fluids and productive stratum of formation, large hydrophobic disperse system is used with density exceeding density of sea water more than 5 times in the volume ensuring in bottom-hole zone of the well creation of spout of large hydrophobic disperse system with height exceeding productive stratum formation opened by perforation not less than 3 times. Mentioned disperse system is a disperse system with volume of 70%, where as disperse medium hydrocarbon liquid is used, this liquid doesn't set solid under temperatures to -10°C, its density is not less than 0.860 g/cm3; as disperse phase a mixture of hard metal balls with diameter within 1-2 mm is used, 50% of this ball mixture volume have fusion temperature well over bottom-hole temperature, and the other 50% of this ball mixture volume have fusion temperature 10°C and more below bottom-hole temperature.

EFFECT: improving reliability of oil-gas wells killing on deep water subsea deposits with excessive temperature and pressure of productive formation.

3 cl, 2 tbl

FIELD: oil and gas industry.

SUBSTANCE: typical well operating equipment can include separator for separation of water from oil, in which the produced mixture of fluid media is obtained and mixture is divided into the corresponding water and oil flows. Water flow can be pumped back to the well. For that purpose, well system for water pumping speed control back to the well can be developed. Group of inventions provides the improvement of well flow control efficiency. Essence of inventions: well equipment designed for receiving fluid medium flows through the first and the second fluid medium flow passage channels is arranged in the well. The above equipment includes flow separation control having the device connected to the first channel and the device connected to the second channel, which are interconnected. Outlet flows in the first and the second channels are controlled by means of the control.

EFFECT: increasing outlet flow in one of the first and second channels in response to increase in outlet flow in the other of the first and the second channels by means of action on one of the above devices to keep constant ratio of outlet flows in the above channels.

16 cl, 6 dwg

FIELD: oil and gas production.

SUBSTANCE: method includes gaslift well operation by adjusting the flow rate of working and produced gas. The withdrawal of produced gas is done by tubing string and additional tubing string. The flow rate of working and produced gas is adjusted by opening and closing of driven shut-off elements in accordance to the control signals. Control signals come from automatic control unit and are generated according to the results of measured values compared with set parameter values. Note that the pressure is measured in the mouth and bottom hole, at the same time the flow rate of produced gas is measured. The flow rate of working and produced gas is adjusted in such a way to provide the specified well operation mode.

EFFECT: increase of well operation efficiency, reduction of level and removal of fluid accumulated in bottom-hole zone, provision of well operation stability.

2 cl, 1 dwg

FIELD: oil and gas production.

SUBSTANCE: system for use in the hole includes the string designed for location in the hole that consists of submersible electric pump, the first part of inductive coupler and completion section. Note that completion section is located in the well zone under development and includes the second part of inductive coupler, isolating packer, detection cable and electric device electrically connected to the second part of inductive coupler. Note that detection cable goes through the packer for provision of sensors to some well zones.

EFFECT: increase of system operation efficiency and collection of measurement data referred to the well characteristics.

28 cl, 7 dwg

FIELD: mining industry.

SUBSTANCE: invention can be used in case of gas-lift operation of wells equipped by free piston-type installations. Invention envisages stopping well, connecting tube space and annular space in wellhead, recording bottom zone and wellhead pressures in tube and annular spaces, and computing well operation parameters using inflow curve plotted according to differences of bottom zone and wellhead pressures. Volume of produced fluid is found from potential output of formation and from condition of output of free piston. When comparing these volumes, parameters of well are computed in the base of minimum volume value.

EFFECT: optimized well operation.

2 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: foam-forming compound for shutting wells contains hydrocarbon liquid, mixture of surfactants, one of components thereof is water solution of lignosulphonate reagent of 25% concentration, herbal filling agent and 20% water solution of calcium chloride, as lignosulphonate agent reagent it contains powder-like technical lignosulphonate, and as other component of surfactant mixture - hexamethylentetramine, and as herbal filling agent - peat or grass flour with following ratio of components in percents of mass: hydrocarbon liquid 12-14, said water solution of technical powder-like lignosulphonate 17-21, hexamethylentetramine 0.17-0.63, peat or grass flour 3-6, said calcium chloride solution - the rest, while relation of mass portions between said water solution of technical powder-like lignosulphonate and hexamethylentetramine is 1: 0.01-0.03 respectively, as grass flour it contains pulverized herbal waste of grain bread production or similar substance.

EFFECT: higher efficiency.

2 cl, 18 ex, 1 dwg

FIELD: oil and gas extractive industry.

SUBSTANCE: compound includes water and inhibiting salt, as inhibiting salt contains processed electrolyte - side product during production of magnesium via electrolysis from carnallite, and additionally as reducer of filtering and thickener - carbooximethylcellulose polymer, and as colmatation agent - magnesium oxide with following relation of components in percents of mass: processed electrolyte - side product of magnesium production via electrolysis from carnallite 10.0-15.0, carbooximethylcellulose 2.5-3.0; magnesium oxide 1.0-2.0, water 80.0-86.5.

EFFECT: higher efficiency.

3 tbl

FIELD: oil and gas producing industry, in particular composition for killing of well.

SUBSTANCE: claimed polysaccharide gel contains sweet or mineralized water, polysaccharide gelling agent, boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and mixture of non-ionic and anionic surfactant (complex surfactant). Mixture of water soluble oxyethilated alkylphenols and their sulphoethoxylates in form of sodium salts or salts with triethanolamine is used as complex surfactant in amount of 0.1-0.5 kg on 1000 l of water being the gel base. Polysaccharide gel is obtained by dissolution and hydration of polysaccharide gelling agent in sweet or mineralized water (preferably monovalent ion solution) followed by treatment of obtained polysaccharide solution with aqueous solution including boron cross-linking agent, diethanolamine, quaternary ammonium compounds, and complex surfactant.

EFFECT: well killing composition of improved quality.

2 cl, 6 ex, 1 tbl

FIELD: oil extractive industry.

SUBSTANCE: method includes mounting compressor pump in such a way, that input aperture of tail piece was positioned below bed sole. Prior to that water cone in face-adjacent zone is destroyed by draining water through tail piece, connected to lower suck-in valve of compressor pump cylinder, and along behind-pipe space through side suck-in valve of compressor pump cylinder. In case of increase of hydrocarbon contained in drained liquid beginning of water cone destruction is assumed. Draining is continued until destruction of emulsion in water cone, formed in non-homogenous porous environment of bed at limits of hydrocarbon-water and water-hydrocarbon, separation of water and hydrocarbon streams and bringing current water-hydrocarbon contact to initial position. Then during extraction water is drained through tail piece, and hydrocarbon - along behind-pipe space.

EFFECT: higher yield.

3 cl, 1 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes preparation of technological liquid - water solution of sylvinite ore mixture with chlorine calcium by solving a mixture of components in hot fresh technical water, drained from oil and water preparation plants or bed water. During solution of sylvinite ore mixture with chlorine calcium in bed water the latter is drained from the well at temperature 60-90°C. Technological liquid is produced with solution density 1.23-1.37 t/m3. Then prepared technological liquid is fed into well shaft a bit lower, oppositely to zone and above ceiling of productive bed with forming of hydraulic column above the latter. Then well shaft to the mouth is filled with water. Value of technological liquid hydraulic column of high density on basis of said mixture, fed into well shaft above ceiling of productive column of technological liquid is taken in amount, necessary and enough from well stopping conditions.

EFFECT: higher efficiency.

6 cl, 1 ex

FIELD: oil and gas production.

SUBSTANCE: water-based composition that can be used for killing of well during pullout of hole and well remedial work as well as for temporary abandonment of well contains, wt %: carboxymethylcellulose3.5-4.5, sodium hydroxide1.5-2.0, copper sulfate 0.3-0.4, and methanol 4.0-16.0.

EFFECT: improved rheological properties of composition and increased lifetime of formed gels.

1 tbl

FIELD: oil and gas industry.

SUBSTANCE: method includes serial pumping into well of buffer, blocking and pressing liquid, blocking liquid contains hydrocarbon base, acyclic acid, caustic soda and mineral filler with following relation of components in percents of mass: hydrocarbon base 41-72, acyclic acid 6.1-14.4, caustic soda 4.9-13.0, mineral filler the rest. Hydrocarbon base of blocking liquid is oil or oil processing products. As mineral filler blocking liquid has calcium carbonate with diameter of particles no less than 2 micrometers.

EFFECT: higher efficiency, simplified maintenance, simplified construction.

3 cl, 1 ex

FIELD: oil industry.

SUBSTANCE: at least one acoustic dynamic is mounted immediately on product pipe in oil well and acoustic characteristic of flowing environment flow is determined in product pipe. It is sent into surface controller, using product pipe. Using surface controller flowing substance flowing mode is determined, on basis of which working parameters of oil well are adjusted. Working parameters of oil well can be adjusted to detect Taylor mode of flow. For adjustment of working parameters throttle is used and/or controlled valve of oil well, controlling amount of gas, forces into product pipe. For determining mode of flow of flowing environment artificial neuron net can be used. It is possible is provide energy for acoustic sensor through product pipe. It is possible to determine additional physical characteristics of flowing substance, for example pressure and temperature.

EFFECT: higher efficiency.

3 cl, 22 dwg

FIELD: mining industry.

SUBSTANCE: system has first induction throttle, second induction throttle and controlled switch. Second induction throttle is positioned near second branch of pipeline structure. Controlled switch has two outputs. First switch output is electrically connected to pipeline structure on the side of induction throttles connection, where first and second branches of pipeline structure intersect. Second output of switch is electrically connected to pipeline structure on other side of at least one induction throttle. Pipeline structure can be positioned inside oil well, and can have casing string and operation tubing column. Also described is method for extracting oil products from oil well using said system.

EFFECT: higher efficiency.

4 cl, 10 dwg

Up!