CN114876422A - Flow control and multi-stratum fluid integrated injection device and method - Google Patents
Flow control and multi-stratum fluid integrated injection device and method Download PDFInfo
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- CN114876422A CN114876422A CN202210518147.4A CN202210518147A CN114876422A CN 114876422 A CN114876422 A CN 114876422A CN 202210518147 A CN202210518147 A CN 202210518147A CN 114876422 A CN114876422 A CN 114876422A
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/16—Modification of mine passages or chambers for storage purposes, especially for liquids or gases
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/70—Combining sequestration of CO2 and exploitation of hydrocarbons by injecting CO2 or carbonated water in oil wells
Abstract
The invention discloses a flow control and multi-stratum fluid integrated injection device and a method, and the technical scheme is as follows: the packer comprises a ground control system, an oil pipe system, a packer system, a pressure regulating system and a working stratum; the ground control system is arranged on the ground at the uppermost end and is connected with an oil pipe system and a pressure adjusting system which are positioned in a drilling well downwards, the packer system and the pressure adjusting system are installed on the oil pipe system, and the stratum sealed by the packer system is connected with the stratum through the drilling well and through a working stratum. By means of the device, the multi-stratum unified injection fluid can be controlled in the whole course of the stratum flow, and the flow in the single stratum in different depths can be changed arbitrarily according to the actual condition and the requirement of the stratum under the condition that the total injection flow is not changed. The stratum changes and can be controlled during the unified injection, the overall fluctuation condition is small, the stratum environment is more stable during the multi-stratum unified injection, and the unified injection efficiency is higher.
Description
Technical Field
The invention relates to the field of geological engineering and energy exploration, in particular to a flow control and multi-stratum fluid injection device and a method.
Background
CO developed in the past 2 、H 2 The work of carbon dioxide sequestration and enhanced oil and gas production in underground storage or sequestration demonstration projects such as He and the like is often carried out in a single stratumIn the prior art, the amount of the carbon dioxide to be sealed and stored is small, the required land area is large, and the requirement of carbon emission reduction cannot be met, so that the land resource is effectively utilized to improve the sealing amount of the carbon dioxide in a unit area, the land resource is saved to complete the carbon neutralization target on time, meanwhile, parameters such as permeability, porosity and the like in different strata of the strata have obvious difference due to different lithologic compositions, and the flow of fluid is obviously different due to the flow of the fluid in different strata
The Shenhua group firstly carries out a multi-stratum system injection experiment in China recently, which is different from the previous single-stratum injection experiment, and finds that fluid cannot be effectively injected into each stratum in the underground due to the stratum structure, rock composition, damping and the like, about 80% of the injected fluid is concentrated in a single stratum, the multi-stratum system injection is seriously influenced, how to effectively utilize limited land resources to enhance the sealed storage amount of the fluid such as carbon dioxide and the like in a unit area is realized, and the control of the flow difference of the fluid in different stratums in different-depth stratums due to the stratum structure, the stratum physical properties, the damping and the like is the problem and technical difficulty which need to be solved by the current stratum fluid injection and multi-stratum system injection technology.
Disclosure of Invention
The invention aims to provide a flow control and multi-stratum fluid integrated injection device, which has the advantages of simple structure, convenience in use, controllable multi-stratum integrated injection fluid in the whole process of stratum flow, higher integrated injection efficiency, high stratum utilization rate, capability of effectively integrating injection in stratums with different depths and capability of greatly increasing the injection amount and the exploitation amount of stratum fluid.
Another object of the present invention is to provide a method for controlling flow and unifying multiple formation fluids, which is easy and simple to operate, and can fully utilize the formation space to unify in the formations with different depths and control the flow in the formations with different depths. The problems mentioned in the background art are solved.
The technical purpose of the invention is realized by the following technical scheme:
a flow control and multi-formation fluid injection device comprises a ground control system, an oil pipe system, a packer system, a pressure regulating system and a working formation; the ground control system is arranged on the ground at the uppermost end and is downwards connected with an oil pipe system and a pressure adjusting system which are positioned in a drilling well, the packer system and the pressure adjusting system are installed on the oil pipe system, the stratum sealed by the packer system is connected with the stratum through the drilling well, the ground control system controls the injection of ground fluid and controls the pressure in the sealed stratum of the oil pipe system, the packer system and the pressure adjusting system which are connected with the ground control system to change the flow of the stratum.
Preferably, the tubing system is formed by connecting standard tubing in the field of oil fields up and down in a well, the tubing system is connected with packer systems at tubing positions at the upper end and the lower end of a stratum requiring fluid injection after the stratum is perforated, the tubing system is also connected with a pressure regulating system in the stratum sealed by the packer, and the fluid injected by the tubing system reaches the stratum sealed by the packer system through the tubing system by a ground control system.
Preferably, the packer system is composed of a plurality of packers connected in series on a tubing system, the packer system comprises a first packer, a second packer, a third packer and a fourth packer, the packers are connected in series up and down, the number of the packers in the packer system is determined by the number of strata which are injected by a plurality of layers, the packer system moves to reach the stratum with the appointed depth, then seals and seals the stratum with different depths and prevents fluid from moving on the stratum with different depths, and the number of the packers in the packer system is determined by the number of strata which are injected by the layers.
Preferably, the pressure regulating system consists of a pressure regulating pipe, a downhole regulating valve and a downhole sensor fluid injection pipe, the pressure regulating pipe is controlled by the ground control system and can change the pressure of the formation fluid passing through the pressure regulating system, and the downhole regulating valve is a pressure reducing valve capable of working downhole and can change the fluid flow by regulating the output pressure of the pressure reducing valve; the pressure regulating system further comprises a first pressure regulating system, a second pressure regulating system and a third pressure regulating system, wherein the first pressure regulating system comprises a first pressure regulating pipe, a first underground regulating valve, a first underground sensor and a first fluid injection pipe; the second pressure regulating system also comprises a second pressure regulating pipe, a first underground regulating valve, a second underground sensor and a first fluid injection pipe; the third pressure regulating system further comprises a third pressure regulating pipe, a third downhole regulating valve, a third downhole sensor and a third fluid injection pipe; the pressure adjusting system is arranged on an oil pipe system set by the packer system and is connected with the ground control system, the first pressure regulating system is arranged between the first packer and the second packer, the first underground regulating valve, the first underground sensor and the first fluid injection pipe are arranged and fixed on the oil pipe system in a supporting cylinder mode, the first fluid injection pipe is communicated with the oil pipe system after being connected with the first underground sensor and the first underground regulating valve, the ground injection fluid reaches the stratum sealed by the first packer and the second packer through the oil pipe system, the first underground regulating valve, the first underground sensor and the first fluid injection pipe, the upper part of the first pressure regulating pipe passes through a first packer to be connected with a ground control system, and the lower part of the first pressure regulating pipe is connected with a first underground regulating valve and a first underground sensor; the second pressure adjusting system is arranged between a second packer and a third packer, the second underground adjusting valve, a second underground sensor and a second fluid injection pipe are fixedly arranged on the oil pipe system in a supporting cylinder mode, the second fluid injection pipe is connected with the second underground sensor and the second underground adjusting valve and then communicated with the oil pipe system, ground injection fluid reaches the stratum sealed by the second packer and the third packer through the oil pipe system, the second underground adjusting valve, the second underground sensor and the second fluid injection pipe, the upper part of the second pressure adjusting pipe penetrates through the second packer and the first packer to be connected with the ground control system, and the lower part of the second pressure adjusting pipe is connected with the second underground adjusting valve and the second underground sensor; the third pressure regulating system is arranged between the third packer and the fourth packer, the third downhole regulating valve, the third downhole sensor and the third fluid injection pipe are fixedly arranged on the oil pipe system in a supporting cylinder mode, the third fluid injection pipe is communicated with the oil pipe system after being connected with the third downhole sensor and the third downhole regulating valve, ground injection fluid reaches the stratum sealed by the third packer and the fourth packer through the oil pipe system, the third downhole regulating valve, the third downhole sensor and the third fluid injection pipe, the upper part of the third pressure regulating pipe penetrates through the third packer, the second packer and the first packer to be connected with the ground control system, the lower part of the third pressure regulating pipe is connected with the third downhole regulating valve and the third downhole sensor, and the pressure regulating system can change the pressure of the packer system where the pressure regulating system is located for sealing the stratum under the control of the ground control system, the pressure regulating system controls the pressure of the underground regulating valve through a pressure regulating pipe connected with the ground control system, the pressure regulating valve regulates the pressure in a mode that the pressure regulating pipe transmits the hydraulic pressure of the ground to change the state inside a valve body of the underground regulating valve so as to change the output pressure of the underground regulating valve, and therefore the flow of the injected fluid in the stratum is changed, and the first pressure regulating system, the second pressure regulating system and the third pressure regulating system can be controlled independently.
Preferably, the working formation is the primary formation in which the injected fluid flows in the subsurface, the working formation comprises a first working formation, a second working formation, and a third working formation, the working formation is formed by the drilling well after the formation is perforated at a specified depth, for example, and the surface control system is in flow migration in the working formation where the surface injected fluid reaches the packer system through the tubing system, and the specific amount of the working formation is determined by the amount of the formation total injection.
Among the above components, the pressure regulating valve and the downhole sensor in the pressure regulating system are key components, and they are interconnected to solve the technical difficulty of injection disorder caused by different formation differences during fluid injection, so that the ground can realize the technical progress of accurately and effectively controlling the flow of the fluid in the formation,
a flow control and multi-formation fluid integration method comprises the following steps:
s1, determining the number of working layers according to requirements, and adjusting and installing an oil pipe system, a packer system and a pressure adjusting system;
s2, after the ground control system moves the oil pipe system and the pressure adjusting system reaches a working stratum with a specified depth, the ground control system sends the packer system arranged on the oil pipe system to the stratum with the specified depth through the oil pipe system connected with the ground control system, the ground control system seals the packer system by transmitting air pressure or hydraulic pressure and the like with the oil pipe system according to the type of the packer system, and when the packer system needs to be unsealed, the ground control system releases the pressure of the packer system through the oil pipe system to unseal the packer system;
s3, the ground control system adjusts the output pressure of the pressure adjusting system, fluid is injected into the working formation or extracted from the working formation through the oil pipe system, the fluid flow rate in each working formation is controlled, and the output pressure of the pressure adjusting system in the working formation at different depths, which is set by the packer system, can be independently adjusted through the ground control system at any time in the injection and extraction processes to control and change the injection flow rate and the extraction flow rate of the injected fluid;
and S4, after the work is finished, the packer system is unset through the ground control system, and the oil pipe system is moved to other depths to work or wait for the next work.
Through the technical measures of the four steps, particularly the most key step S3, the flow of the fluid in different depth layers is effectively controlled in the whole technology, the technical problem and difficulty that the fluid is difficult to effectively and uniformly inject in the strata with different depths are solved, the four steps achieve the purpose that the fluid can be effectively controlled to be uniformly injected or exploited according to the required flow in different depth layers, the technical effect of an underground space is fully utilized, the technical scheme is mainly different from the prior art in that the fluid and the uniform injection can be simultaneously and effectively controlled to be conducted according to the specified fluid in different depth layers, the exploitation and the injection of the strata with different depth layers in the prior art are required to be conducted according to plans and actual conditions in the strata in different times, and the problems in the prior art can be effectively solved through one set of devices.
Compared with the prior art, the invention has the following advantages and effects:
the method is easy to implement and simple and convenient to operate, and the invention can fully utilize the formation space to carry out the general injection in the formations with different depths and control the flow in the formations with different depths.
The invention has simple structure, monitors various stratum data in the stratum in real time, works in various depths of the stratum efficiently and stably, avoids the influence on the original stratum during the unified injection work to the maximum extent, increases the utilization rate of the stratum space, and increases the unified injection amount and the acquisition amount of the original stratum fluid of the injected fluid in the stratum. The flow of fluid in different degree of depth horizons has effectually been controlled in whole technique, the technical problem and the difficult point that the fluid is difficult to effectively unify notes in the stratum of different degree of depth have been solved, four steps have reached and have made the fluid effectively controlled according to the carrying out of unified notes or exploitation of required flow in different degree of depth horizons, make full use of the technical effect in underground space, the main difference of technical scheme and prior art is that fluid and unified notes can effectively be controlled simultaneously go on according to appointed fluid in different degree of depth horizons, it needs to go on according to plan and the inside actual conditions of stratum in grades to distinguish different degree of depth horizon stratum exploitation and injection in the prior art, one set of device can effectively solve the problem.
By means of the device, the flow of the multi-stratum system injection fluid can be controlled in the whole course of the stratum flow, and the flow in the single stratum in different depths can be changed arbitrarily according to the actual condition and the requirement of the stratum under the condition that the total injection flow is not changed as required.
By means of the device, the stratum changes and can be controlled during the unified injection, the overall fluctuation condition is small, the stratum environment is more stable during the multi-stratum unified injection, and the unified injection efficiency is higher.
And by means of the device, the formation interest rate is high, and formations of different depths can be injected uniformly, so that the injection amount and the production amount of formation fluid are greatly increased.
Drawings
FIG. 1 is a schematic view of an apparatus for flow control and multiple fluid integration according to the present invention;
FIG. 2 is a schematic view of a pressure regulating system apparatus of the present invention.
1-surface control system, 2-tubing system, 3-packer system, 31-first packer, 32-second packer, 33-third packer, 34-fourth packer, 4-pressure regulation system, 41-pressure regulation tube, 42-downhole pressure regulation valve, 43-downhole sensor, 44-fluid injection tube, 4 a-first pressure regulation system, 41 a-first pressure regulation tube, 42 a-first downhole pressure regulation valve, 43 a-first downhole sensor, 44 a-first fluid injection tube, 4 b-second pressure regulation system, 41 b-second pressure regulation tube, 42 b-second downhole pressure regulation valve, 43 b-second downhole sensor, 44 b-second fluid injection tube, 4 c-third pressure regulation system, 41 c-third pressure regulation tube, 42 c-third downhole pressure regulation valve, 43 c-third downhole sensor, 44 c-third fluid injection tube, 5-working formation, 51-first working formation, 52-second working formation, 53-third working formation.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1 and 2, a flow control and multi-formation fluid injection device comprises a surface control system 1, a tubing system 2, a packer system 3, a pressure regulating system 4 and a working formation 5; the ground control system 1 sets up on the ground of top and connects oil pipe system 2 and the pressure regulation system 4 that is located the drilling downwards, packer system 3 and pressure regulation system 4 install on oil pipe system 2, it is continuous with the stratum through drilling through work stratum 5 in the stratum that packer system 3 seals, the injection of ground fluid of ground control system 1 control is rather than the oil pipe system 2 that link to each other, packer system 3, pressure regulation system 4 control packer system 2 seal the pressure in the stratum and change the stratum flow.
The oil pipe system 2 is formed by connecting standard oil pipes in the field of oil fields up and down in a well, the oil pipe system 2 is connected with a packer system 3 at the oil pipe at the upper end and the lower end of a stratum after the stratum requiring fluid injection is perforated, the oil pipe system 2 is also connected with a pressure adjusting system 4 in the stratum sealed by the packer, and the fluid injected by the oil pipe system 2 reaches the stratum sealed by the packer system 3 through the oil pipe system 2 by a ground control system 1.
The packer system 3 is composed of a plurality of packers connected in series on the oil pipe system 2, the packer system 3 comprises a first packer 31, a second packer 32, a third packer 33 and a fourth packer 34, the number of the packers in the packer system 3 is determined by the number of strata which are injected by a plurality of layers, the movement of the oil pipe system 2 reaches the rear seat seal in the strata with the appointed depth, seals the strata with different depths and prevents the fluid from moving on the strata with different depths, and the number of the packers in the packer system 3 is determined by the number of strata which are injected by the strata.
The pressure regulating system 4 consists of a pressure regulating pipe 41, a downhole regulating valve 42 and a downhole sensor 43 fluid injection pipe 44, the pressure regulating pipe is controlled by the surface control system 1 and can change the pressure of the formation fluid passing through the pressure regulating system 4, and the downhole regulating valve 42 is a pressure reducing valve capable of working downhole and can change the flow rate of the fluid by regulating the output pressure of the pressure reducing valve; the pressure regulation system 4 further comprises a first pressure regulation system 4a, a second pressure regulation system 4b, a third pressure regulation system 4c, the first pressure regulation system 4a comprising a first pressure regulation pipe 41a, a first downhole regulation valve 42a, a first downhole sensor 43a, a first fluid injection pipe 44 a; the second pressure regulating system 4b further includes a second pressure regulating pipe 41b, a first downhole regulating valve 42b, a second downhole sensor 43b, a first fluid injection pipe 44 b; the third pressure regulation system 4c further comprises a third pressure regulation conduit 41c, a third downhole regulation valve 42c, a third downhole sensor 43c, a third fluid injection conduit 44 c; the pressure adjusting system 4 is installed on a tubing system 2 set by the packer system 3 and connected with the surface control system 1, the first pressure adjusting system 4a is installed between the first packer 31 and the second packer 32, the first downhole adjusting valve 42a, the first downhole sensor (43a) and the first fluid injection pipe 44a are installed and fixed on the tubing system 2 in a cartridge manner, the first fluid injection pipe 44a is connected with the first downhole sensor (43a) and the first downhole adjusting valve 42a and then communicated with the tubing system 2, the surface injection fluid reaches the stratum set by the first packer 31 and the second packer 32 through the tubing system 2, the first downhole adjusting valve 42a, the first downhole sensor 43a and the first fluid injection pipe 44a, the upper part of the first pressure adjusting pipe 41a passes through the first packer 31 and is connected with the surface control system 1, the lower part of the first pressure regulating pipe 41a is connected with a first downhole regulating valve 42a and a first downhole sensor 43 a; the second pressure regulating system 4b is installed between the second packer 32 and the third packer 33, the second downhole regulating valve 42b, the second downhole sensor (43b) and the second fluid injection pipe 44b are installed and fixed on the tubing system 2 in a cartridge manner, the second fluid injection pipe 44b is connected with the second downhole sensor (43b) and the second downhole regulating valve 42b and then communicated with the tubing system 2, the surface injection fluid reaches the stratum sealed by the second packer 32 and the third packer 33 through the tubing system 2, the second downhole regulating valve 42b, the second downhole sensor 43b and the second fluid injection pipe 44b, the upper part of the second pressure regulating pipe 41b passes through the second packer 32 and the first packer 31 to be connected with the surface control system 1, and the lower part of the second pressure regulating pipe 41b passes through the second downhole regulating valve 42b, The second downhole sensor 43 b; the third pressure adjusting system 4c is installed between the third packer 33 and the fourth packer 34, the third downhole adjusting valve 42c, the third downhole sensor (43c) and the third fluid injection pipe 44c are installed and fixed on the tubing system 2 in a cartridge manner, the third fluid injection pipe 44c is connected with the third downhole sensor (43c) and the third downhole adjusting valve 42c and then communicated with the tubing system 2, the surface injection fluid reaches the stratum where the third packer 33 and the fourth packer 34 are seated through the tubing system 2, the third downhole adjusting valve 42c, the third downhole sensor 43c and the third fluid injection pipe 44c, the upper part of the third pressure adjusting pipe 41c passes through the third packer 33, the second packer 32 and the first packer 31 and is connected with the surface control system 1, and the lower part of the third pressure adjusting pipe 41c passes through the third downhole adjusting valve 42c, The third downhole sensor 43c is connected, the pressure regulating system 4 can change the packer system 3 where the pressure regulating system 4 is located under the control of the surface control system 1 to seal the formation pressure, the pressure regulating system 4 controls the pressure of the downhole regulating valve 42 through the pressure regulating pipe 41 connected with the surface control system 1, the pressure regulating valve 42 regulates the pressure in a manner that the pressure regulating pipe 41 transmits the hydraulic pressure of the surface to change the state inside the valve body of the underground downhole regulating valve so as to change the output pressure of the downhole regulating valve 42 and further change the flow rate of the injected fluid in the formation, and the first pressure regulating system 4a, the second pressure regulating system 4b and the third pressure regulating system 4c can be controlled independently.
Wherein the working formation 5 is a main formation in which the injected fluid flows in the underground, the working formation 5 comprises a first working formation 51, a second working formation 52 and a third working formation 53, the working formation 5 is formed by drilling a well after a formation perforation at a specified depth and a setting section is set by a separator system 3, the surface control system 1 moves and migrates the fluid injected at the surface in the working formation 5 set by the packer system 3 through a tubing system 2, and the specific number of the working formations 5 is determined by the number of the formation injections.
Through the concrete implementation, the pressure and the damping that fluid received in the different degree of depth stratum of underground packer packing section have obtained controllable technical progress, compare with the system notes experiment that goes on in the past, and the fluid can be controlled system notes each stratum of the different degree of depth, can not be because of the leading to fluid of each stratum condition difference concentrate in a large amount and pour into in certain stratum into, make the system annotate effectual going on.
Example 2:
a method of flow control with multiple formation fluids integration, comprising the steps of:
s1, determining the number of working layers according to requirements, and adjusting and installing the oil pipe system 2, the packer system 3 and the pressure adjusting system 4;
s2, after the ground control system 1 moves the oil pipe system 2 and the pressure adjusting system 4 reaches a working stratum 5 with a specified depth, the ground control system 1 sends the packer system 3 arranged on the oil pipe system 2 to the stratum with the specified depth through the oil pipe system 2 connected with the ground control system 1, the packer system 3 is sealed through pressure transmission modes such as air pressure or hydraulic pressure and the like with the oil pipe system 2 according to the type of the packer system 3, and when the packer system 3 needs to be unsealed, the ground control system 1 relieves the pressure of the packer system 3 through the oil pipe system 2 to unseal the packer system 3;
s3, the ground control system 1 adjusts the output pressure of the pressure adjusting system 4, fluid is injected into the working stratum 5 or stratum fluid in the working stratum 5 is extracted through the oil pipe system 2, the fluid flow rate in each working stratum is controlled, and the output pressure of the pressure adjusting system 4 in the working stratum 5 with different depths, which is set by the packer system 3, can be independently adjusted through the ground control system 1 at any time in the injection and extraction processes to control and change the injection flow rate and the extraction flow rate of the injected fluid;
and S4, after the work is finished, the packer system 3 is unset through the ground control system 1, and the oil pipe system 2 is moved to other depths to work or wait for the next work.
The method is easy to implement and simple and convenient to operate, and the method can fully utilize the formation space to perform the general injection in the formations with different depths and control the flow in the formations with different depths; the invention has simple structure, monitors various stratum data in the stratum in real time, works in various depths of the stratum efficiently and stably, avoids the influence on the original stratum during the unified injection work to the maximum extent, increases the utilization rate of stratum space, and increases the unified injection amount of the injected fluid in the stratum and the acquisition amount of the original fluid in the stratum; the technical scheme is mainly different from the prior art that the fluids and the general injection can be simultaneously and effectively controlled at different depth layers according to the appointed fluids, and the technical scheme is different from the prior art that the exploitation and the injection of the strata at different depth layers are carried out according to plans and actual conditions in the strata in different depth layers in a split mode, and the problems can be effectively solved by one set of device; by means of the device, the multi-stratum unified injection fluid can be controlled in the whole course of stratum flow, and the flow in the single stratum in different depths can be changed arbitrarily according to the actual condition and the requirement of the stratum under the condition that the total injection flow is not changed according to the requirement; by means of the device, stratum changes can be controlled during unified injection, the overall fluctuation condition is small, the stratum environment is more stable during multi-stratum unified injection, and the unified injection efficiency is higher; by means of the device, the formation interest rate is high, formations of different depths can be injected in a unified mode, and the injection quantity and the production quantity of formation fluids are greatly increased.
Example 3:
a flow control and multi-formation fluid integration method comprises the following steps:
the device comprises a ground control system 1, an oil pipe system 2, a packer system 3, a pressure adjusting system 4 and a working stratum 5; the working stratum 5 is arranged in 3 reservoirs with different depths of an underground original stratum and comprises a first working stratum 51, a second working stratum 52 and a third working stratum 53, and the flow control and multi-stratum fluid reinjection method comprises the following steps:
the packer system 3 comprises a first packer 31, a second packer 32, a third packer 33 and a fourth packer 34, and the pressure adjusting system 4 comprises a first pressure adjusting system 4a, a second pressure adjusting system 4b and a third pressure adjusting system 4 c.
The ground control system 2 moves the oil pipe system 2, and after the first pressure regulating system 4a, the second pressure regulating system 4b and the third pressure regulating system 4c in the pressure regulating system 4 reach 3 working strata 5 of a first working stratum 51, a second working stratum 52 and a third working stratum 53 with specified depths respectively, the packer system 3 is set.
The ground control system 1 adjusts the output pressure of the pressure adjusting system 4, fluid is injected into the working stratum 5 including the first working stratum 51, the second working stratum 52 and the third working stratum 53 or stratum original fluid in the working stratum 5 is extracted through the oil pipe system 2, the pressure of the pressure adjusting system 4 of each working stratum 5 is controlled, the fluid flow in the stratum is further controlled, and the injection flow and the extraction flow of the injected fluid can be changed at any time through the output pressure control of the pressure adjusting system 4 in the working stratum 5 with different depths, which are sealed by the packer system 3, can be independently adjusted through the ground control system 1 in the injection and extraction processes.
And 4, after the work is finished, the packer system 3 is unsealed through the ground control system 1, and the oil pipe system 2 is moved to other depths to work or wait for the next work.
The total injection quantity in the current formation fluid system injection is about 60m 3 For 5 consecutive days, the flow data is as follows, where Q is the formation injection flow, Q 1 For the first working formation flow, Q 2 For second working formation flow, Q 3 For the third working formation flow rate, the flow rate is in m 3 /d
Example 4:
the utility model provides a device that flow control and many stratum fluids were annotated, the device comprises ground control system 1, tubing system 2, packer system 3, pressure regulation system 4, working stratum 5, its characterized in that: a drilling and recovery station in the ground control system 1 is connected with an oil pipe in the oil pipe system 2; the ground control system 1 is made of corrosion-resistant materials and used for standard oil field working instruments, such as a drilling machine, a fluid injection and recovery station, a pressure pump and the like, the controllable injection pressure of the ground control system is 100MPa, and an oil pipe system 2, a packer system 3 and a pressure adjusting system 4 which are communicated with the ground control system and are positioned in a drilling well can be controlled on the ground; the ground control system 1 controls the oil pipe system 2 to move in the well at the ground, controls the packer system 3 to seat and work depth in the well, and controls the output pressure of the pressure regulating system 4.
The oil pipe system 2 is connected by a plurality of standard oil pipes in the field of oil fieldsThe diameter of the oil pipe is
The oil pipe system 2 is connected with the ground control system 1 on the ground, the packer system 3 and the pressure adjusting system 4 are installed in the underground, fluid can be injected into a working stratum 5 on the ground through the oil pipe system 2 and the pressure adjusting system 4 connected with the oil pipe system, and the packer system 3 is set and unsealed through the oil pipe system 2.
The packer system 3 is composed of a plurality of hydraulic packers in the field of oil fields, and comprises a first packer 31, a second packer 32, a third packer 33 and a fourth packer 34 which are sequentially arranged on the oil pipe system 2, the ground control system 1 and the oil pipe system 2 are used for pressurizing and decompressing the packer system 3 or the packer unsetting system 3, a through hole for a control pipeline such as a pressure adjusting pipe 41 to pass through is reserved in the packer system 3, and after the packer system 3 passes through a specified packer, the packer system 3 is used for setting a well and forming a working stratum 5; wherein the first packer 31, the second packer 32 are set to form a first working stratum 51, the second packer 32, the third packer 33 are set to form a second working stratum 52, the third packer 33, the fourth packer 34 are set to form a third working stratum 53, the packer system 3 ensures independence in the working strata 5 with different depths, the packer at different positions of the packer system can block the connection of non-packer positions in a well bore when set, and the influence of series flow of fluid between different positions on multi-stratum system injection and flow control can be prevented. The pressure adjusting system 4 comprises a first pressure adjusting system 4a, a second pressure adjusting system 4b and a third pressure adjusting system 4c which are arranged at different depths in the stratum and are composed of a pressure adjusting pipe 41, a downhole pressure adjusting valve 42, a downhole sensor 43 and a fluid injection pipe 44, the pressure adjusting system 4 is installed on the oil pipe system 2 after being armored, downhole data can be monitored, the pressure in the working stratum 5 where the pressure adjusting system 4 is located can be adjusted, and fluid can be injected into the working stratum 5 through the ground control system 1 and the oil pipe system 2. The pressure regulating pipe 41 includes a first pressure regulating pipe 41a, a second pressure regulating pipe 41b, and a third pressure regulating pipe 41 c; the downhole pressure regulating valves 42 include a first downhole pressure regulating valve 42a, a second downhole pressure regulating valve 42b, a third downhole pressure regulating valve 42 c; the downhole sensors 43 include a first downhole sensor 43a, a second downhole sensor 43b, a third downhole sensor 43 c; the fluid injection tubes 44 include a first fluid injection tube 44a, a second fluid injection tube 44b, and a third fluid injection tube 44 c. The pressure adjusting pipe 41 is made of 316L stainless steel with the pipe diameter of 1/4' and can transmit photoelectric, air pressure and hydraulic signals, the pressure adjusting pipe 41 is fixed on the oil pipe system 2 in a buckling mode and the like and can be communicated with the pressure adjusting system 4 and the ground control system 1, the instruction of the ground control system 1 is transmitted into the pressure adjusting system 4 through the pressure adjusting pipe 41, and the monitoring data of the pressure adjusting system 4 is also fed back into the ground control system 1 through the pressure adjusting pipe 41; the underground pressure regulating valve 42 is a hydraulic pressure reducing valve, the adjustable pressure interval is 0-100MPa, and fluid injected by the ground control system 1 passes through the underground pressure regulating valve 42 of the oil pipe system 2 and the pressure regulating system 4 and then is injected into a working stratum; the underground sensor 43 uses an electronic sensor, transmits data to the ground control system 1 through the pressure regulating pipe 41, can monitor underground temperature, pressure, PH, flow, OPR, conductance and other data, and the ground control system 1 regulates the output pressure of the underground pressure regulating valve 42 according to the monitoring data of the formations at different depths; the fluid injection pipe 44 is an outlet of the working formation 5 for injecting fluid into the pressure regulating system 4 and the surface control system 1, and the injected fluid passes through the surface control system 1 and the oil pipe system 2, is regulated by the pressure regulating system 4, and is injected into the working formation 5 at a set flow rate.
The working stratum 5 comprises a first working stratum 51, a second working stratum 52 and a third working stratum 53, the working stratum 5 is arranged at different depths in the underground and is a main reservoir for injecting fluid, and the working stratum 5 increases the mobility of the fluid in the stratum through perforation when multiple strata are injected.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A flow control and multi-formation fluid injection device comprises a ground control system (1), an oil pipe system (2), a packer system (3), a pressure regulating system (4) and a working formation (5); the method is characterized in that: the ground control system (1) sets up on the ground of top and connects oil pipe system (2) and pressure regulation system (4) that are located the drilling well downwards, packer system (3) and pressure regulation system (4) are installed on oil pipe system (2), it links to each other with the stratum through well drilling through work stratum (5) in the stratum that packer system (3) sealed, ground control system (1) control ground fluid's injection and its oil pipe system (2), packer system (3), pressure regulation system (4) control packer system (2) that link to each other seal the intrastratum pressure and change the stratum flow.
2. A flow control and multi-formation fluid integration apparatus according to claim 1, wherein: the oil pipe system (2) is formed by connecting standard oil pipes in the field of oil fields up and down in a well drilling well, the oil pipe system (2) is connected with a packer system (3) at the oil pipe at the upper end and the lower end of a stratum after the stratum requiring fluid injection is perforated, the oil pipe system (2) is also connected with a pressure adjusting system (4) in the stratum sealed by the packer, and the fluid injected by the oil pipe system (2) reaches the stratum sealed by the packer system (3) through the oil pipe system (2) through a ground control system (1).
3. A flow control and multi-formation fluid integration apparatus according to claim 1, wherein: packer system (3) are established ties the packer on oil pipe system (2) by a plurality of and are constituteed, packer system (3) are established ties from top to bottom including the packer of first packer (31), second packer (32), third packer (33), fourth packer (34) and are constituteed, the quantity of packer in packer system (3) is decided by the stratum quantity that the multilayer was annotated, through the removal of oil pipe system (2) arrives the stratum of the interior backseat seal of appointed degree of depth, seals the stratum of the different degree of depth and prevents that fluid from migrating on the stratum of different degree of depth horizons, the quantity of packer system (3) is decided by the stratum volume of annotating.
4. A flow control and multi-formation fluid integration apparatus according to claim 1, wherein: the pressure regulating system (4) consists of a pressure regulating pipe (41), a downhole regulating valve (42) and a downhole sensor (43) fluid injection pipe (44), the pressure regulating system is controlled by the ground control system (1) and can change the pressure of the fluid passing through the pressure regulating system (4), and the downhole regulating valve (42) is a pressure reducing valve capable of working downhole and can change the flow rate of the fluid by regulating the output pressure of the pressure reducing valve; the pressure regulation system (4) further comprises a first pressure regulation system (4a), a second pressure regulation system (4b), a third pressure regulation system (4c), the first pressure regulation system (4a) comprising a first pressure regulation pipe (41a), a first downhole regulation valve (42a), a first downhole sensor (43a), a first fluid injection pipe (44 a); the second pressure regulation system (4b) further comprises a second pressure regulation pipe (41b), a first downhole regulation valve (42b), a second downhole sensor (43b), a first fluid injection pipe (44 b); the third pressure regulation system (4c) further comprising a third pressure regulation conduit (41c), a third downhole regulation valve (42c), a third downhole sensor (43c), a third fluid injection conduit (44 c); the pressure adjusting system (4) is arranged on an oil pipe system (2) set by a packer system (3) and connected with a ground control system (1), the first pressure adjusting system (4a) is arranged between a first packer (31) and a second packer (32), the first underground adjusting valve (42a), the first underground sensor (43a) and the first fluid injection pipe (44a) are fixedly arranged on the oil pipe system (2) in a supporting cylinder mode, the first fluid injection pipe (44a) is communicated with the oil pipe system (2) after being connected with the first underground sensor (43a) and the first underground adjusting valve (42a), and ground injection fluid reaches the strata set by the first packer (31) and the second packer (32) through the oil pipe system (2), the first underground adjusting valve (42a), the first underground sensor (43a) and the first fluid injection pipe (44a), the upper part of the first pressure regulating pipe (41a) passes through a first packer (31) to be connected with a ground control system (1), and the lower part of the first pressure regulating pipe (41a) is connected with a first underground regulating valve (42a) and a first underground sensor (43 a); the second pressure adjusting system (4b) is installed between a second packer (32) and a third packer (33), the second downhole adjusting valve (42b), a second downhole sensor (43b) and a second fluid injection pipe (44b) are installed and fixed on the oil pipe system (2) in a supporting cylinder mode, the second fluid injection pipe (44b) is communicated with the oil pipe system (2) after being connected with the second downhole sensor (43b) and the second downhole adjusting valve (42b), surface injection fluid reaches the stratum sealed by the second packer (32) and the third packer (33) through the oil pipe system (2), the second downhole adjusting valve (42b) and the second fluid injection pipe (44b), the upper portion of the second pressure adjusting pipe (41b) penetrates through the second packer (32) and the first packer (31) and is connected with the surface control system (1), the lower part of the second pressure regulating pipe (41b) is connected with a second downhole regulating valve (42b) and a second downhole sensor (43 b); the third pressure adjusting system (4c) is arranged between a third packer (33) and a fourth packer (34), the third downhole adjusting valve (42c), a third downhole sensor (43c) and a third fluid injection pipe (44c) are fixedly arranged on the oil pipe system (2) in a supporting cylinder mode, the third fluid injection pipe (44c) is communicated with the oil pipe system (2) after being connected with the third downhole sensor (43c) and the third downhole adjusting valve (42c), surface injection fluid reaches the strata sealed by the third packer (33) and the fourth packer (34) through the oil pipe system (2), the third downhole adjusting valve (42c), the third downhole sensor (43c) and the third fluid injection pipe (44c), and the upper part of the third pressure adjusting pipe (41c) penetrates through the third packer (33), the second packer (32), The first packer (31) is connected with a ground control system (1), the lower part of a third pressure regulating pipe (41c) is connected with a third underground regulating valve (42c) and a third underground sensor (43c), the pressure regulating system (4) can change the pressure of the formation sealed by the packer system (3) where the pressure regulating system (4) is positioned under the control of the ground control system (1), the pressure regulating system (4) controls the pressure of the underground regulating valve (42) through the pressure regulating pipe (41) connected with the ground control system (1), the pressure regulating valve (42) regulates the pressure in a way that the pressure regulating pipe (41) transmits the hydraulic pressure of the ground to change the state inside a valve body of the underground regulating valve and changes the output pressure of the underground regulating valve (42) so as to change the flow of the injected fluid in the formation, the first pressure regulating system (4a), The second pressure regulating system (4b) and the third pressure regulating system (4c) can be controlled separately.
5. A flow control and multi-formation fluid integration apparatus according to claim 1, wherein: the working stratum (5) is a main stratum in which injected fluid flows in the underground, the working stratum (5) comprises a first working stratum (51), a second working stratum (52) and a third working stratum (53), the working stratum (5) is formed by a drilling well after a stratum perforation with a specified depth is performed, the packer system (3) is used for setting a section, the surface control system (1) enables the fluid injected at the surface to flow and move in the working stratum (5) set by the packer system (3) through a tubing system (2), and the specific number of the working stratum (5) is determined by the number of the stratum systems.
6. A flow control and multi-stratum fluid integration method is characterized by comprising the following steps: the method comprises the following steps:
s1, determining the number of working layers according to the requirement, and adjusting and installing the oil pipe system (2), the packer system (3) and the pressure adjusting system (4);
s2, after the ground control system (1) moves the oil pipe system (2) and the pressure adjusting system (4) reaches a working stratum (5) with a specified depth, the ground control system (1) sends the packer system (3) installed on the oil pipe system (2) to the stratum with the specified depth through the oil pipe system (2) connected with the ground control system, the packer system (3) is sealed through pressure transmission with the oil pipe system (2) in modes of air pressure or hydraulic pressure and the like according to the type of a packer of the packer system (3), and when the packer system (3) needs to be unsealed, the ground control system (1) decompresses the packer system (3) through the oil pipe system (2) to unseal the packer system (3);
s3, the ground control system (1) adjusts the output pressure of the pressure adjusting system (4), fluid is injected into the working stratum (5) or stratum fluid in the working stratum (5) is extracted through the oil pipe system (2) and the fluid flow in each working stratum is controlled, and the output pressure of the pressure adjusting system (4) in the working stratum (5) with different depths, which are sealed by the packer system (3), can be independently adjusted through the ground control system (1) at any time in the injection and extraction processes to control and change the injection flow and the extraction flow of the injected fluid;
and S4, after the work is finished, the packer system (3) is unset through the ground control system (1), and the oil pipe system (2) is moved to other depths to work or wait for the next work.
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