CN114876422B - Flow control and multi-layer fluid unification device and method - Google Patents
Flow control and multi-layer fluid unification device and method Download PDFInfo
- Publication number
- CN114876422B CN114876422B CN202210518147.4A CN202210518147A CN114876422B CN 114876422 B CN114876422 B CN 114876422B CN 202210518147 A CN202210518147 A CN 202210518147A CN 114876422 B CN114876422 B CN 114876422B
- Authority
- CN
- China
- Prior art keywords
- packer
- stratum
- pressure
- pressure regulating
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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-layer fluid unification device and a method, and the technical scheme is as follows: the system 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 uppermost ground and is downwards connected with the oil pipe system and the pressure regulating system which are positioned in the well drilling, the packer system and the pressure regulating system are arranged on the oil pipe system, and the stratum sealed by the packer system is connected with the stratum through the well drilling and the working stratum. By means of the device, the multi-stratum system injection fluid is controllable in the whole stratum flow, and the flow in a single stratum in different depths can be changed according to the actual stratum condition and the requirements at will under the condition that the total injection flow is unchanged. The stratum changes controllably during the injection, the overall fluctuation condition is smaller, the stratum environment is more stable during the injection of multiple strata, and the 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-layer fluid injection device and method.
Background
CO developed in the past 2 、H 2 The sealing and strengthening of carbon dioxide and oil gas production in underground storage or sealing demonstration projects such as He are often carried out in a single stratum, the quantity of the sealed carbon dioxide is small and the required land area is large, the carbon emission reduction requirement cannot be met, therefore, the land resource is required to be effectively utilized to improve the sealing quantity of the carbon dioxide in the unit area, the land resource is saved to complete the carbon neutralization target on time, meanwhile, the permeability, the porosity and other parameters in the stratum are obviously different due to different lithology compositions, and the flow rate of the fluid is obviously different due to the fact that the stratum flows in different depth
The Shenhua group firstly carries out multi-stratum system injection experiments in China recently, the experiments are different from the traditional single-stratum injection experiments, in the experiments, it is found that fluid cannot be effectively injected into each layer in the underground due to reasons of stratum structure, rock composition, damping and the like, about 80% of injected fluid is concentrated in a single stratum, the multi-stratum system injection is seriously influenced, the limited land resources are effectively utilized to strengthen the sealing quantity of the fluid such as carbon dioxide in a unit area, and the flow difference of the fluid in different stratum caused by reasons of stratum structure, stratum physical property, damping and the like in the stratum at different depths is the problem and technical difficulty that the conventional stratum fluid injection and multi-stratum system injection technology needs to be solved.
Disclosure of Invention
Aiming at the problems in the background art, the invention aims to provide a flow control and multi-stratum fluid injection device which is simple in structure, convenient to use, higher in injection efficiency and high in stratum utilization rate, and can be used for injecting stratum with different depths effectively, so that the injection amount and the stratum fluid exploitation amount are greatly increased.
The invention also aims to provide a method for controlling flow and unifying multi-layer fluid, which is easy to implement and simple to operate, and can fully utilize stratum space to unify in stratum with different depths and control flow in stratum with different depths. The problems mentioned in the background art are solved.
The technical aim of the invention is realized by the following technical scheme:
a flow control and multi-stratum fluid unifying device 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 uppermost ground and is downwards connected with the oil pipe system and the pressure regulating system which are positioned in the drilling well, the packer system and the pressure regulating system are arranged on the oil pipe system, the stratum sealed by the packer system is connected with the stratum through the working stratum through the drilling well, and the ground control system controls the injection of ground fluid to the oil pipe system, the packer system and the pressure regulating system connected with the ground control system to control the pressure in the stratum sealed by the packer system and change the stratum flow.
Preferably, the oil pipe system is formed by connecting standard oil pipes in the oil field up and down in a well, the oil pipe system is connected with a packer system at the oil pipe at the upper end and the lower end of the stratum after perforation of the stratum section needing fluid injection, the oil pipe system is also connected with a pressure regulating system in the stratum sealed by the packer, and the fluid injected by the oil pipe system reaches the stratum sealed by the packer system through a ground control system.
Preferably, the packer system is composed of a plurality of packers connected in series on an oil pipe system, the packer system comprises a first packer, a second packer, a third packer and a fourth packer which are connected in series up and down, the number of the packers in the packer system is determined by the number of stratum of multi-layer system injection, the stratum of the appointed depth is sealed after the stratum of the appointed depth is reached through the movement of the oil pipe system, the stratum of different depths is sealed, and the migration of fluid on the stratum of the layers of different depths is prevented, and the number of the packers in the packer system is determined by the stratum system injection number.
Preferably, the pressure regulating system consists of a pressure regulating pipe, an underground regulating valve and an underground sensor fluid injection pipe, wherein the pressure regulating system is controlled by a ground control system and can change the pressure of stratum fluid passing through the pressure regulating system, and the underground regulating valve is a pressure reducing valve which can work underground and can change the fluid flow by adjusting 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 downhole regulating valve, a first downhole sensor and a first fluid injection pipe; the second pressure regulating system further comprises a second pressure regulating pipe, a first downhole regulating valve, a second downhole sensor and a first fluid injection pipe; the third pressure regulating system further comprises a third pressure regulating pipe, a third underground regulating valve, a third underground sensor and a third fluid injection pipe; the pressure regulating system is arranged on an oil pipe system which is set by the packer system and is connected with the ground control system, the first pressure regulating system is arranged between a first packer and a second packer, the first downhole regulating valve, the first downhole sensor and the first fluid injection pipe are fixedly arranged 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 downhole sensor and the first downhole regulating valve, ground injection fluid reaches the stratum which is set by the first packer and the second packer through the oil pipe system, the first downhole regulating valve, the first downhole sensor and the first fluid injection pipe, the upper part of the first pressure regulating pipe penetrates through the first packer and is connected with the ground control system, and the lower part of the first pressure regulating pipe is connected with the first downhole regulating valve and the first downhole sensor; the second pressure regulating system is arranged between a second packer and a third packer, the second underground regulating valve, the second underground sensor and the 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 regulating valve and then communicated with the oil pipe system, ground injection fluid reaches the stratum which is sealed by the second packer and the third packer through the oil pipe system, the second underground regulating valve and the second underground sensor and the second fluid injection pipe, the upper part of the second pressure regulating 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 regulating pipe is connected with the second underground regulating valve and the second underground sensor; the system is characterized in that 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 connected with the third downhole sensor and the third downhole regulating valve and then communicated with the oil pipe system, ground injection fluid passes through the oil pipe system, the third downhole regulating valve and the third fluid injection pipe to reach the stratum sealed by the third packer and the fourth packer, the upper part of the third pressure regulating pipe passes 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, the pressure regulating system can change the stratum pressure of the packer system where the pressure regulating system is arranged under the control of the ground control system, the pressure regulating system controls the pressure of the downhole regulating valve through the pressure pipe connected with the ground control system, the pressure regulating valve is large and small, and the pressure regulating system can change the pressure of the underground regulating system through the pressure regulating valve which is arranged in the ground, and the pressure regulating system can change the pressure regulating system independently.
Preferably, the working formations are primary formations where injected fluid flows in the subsurface, the working formations including a first working formation, a second working formation, a third working formation, the working formations being formed by drilling a well after perforation of the formation, such as at a specified depth, in a section set by a spacer system, the surface control system being configured to move in the flow of injected fluid at the surface through a tubing system to the working formations set by a packer system, the specific number of working formations being determined by the number of formation system injections.
Among the above components, the pressure regulating valve and the down-hole sensor in the pressure regulating system are key components, which are connected with each other to solve the technical difficulty of injection disorder caused by different stratum differences during fluid injection, so that the ground can realize the technical progress of accurately and effectively controlling the flow of fluid in the stratum,
a method of flow control and multi-formation fluid priming comprising the steps of:
s1, determining the number of working layers according to requirements, and adjusting an oil pipe installation system, a packer system and a pressure adjusting system;
s2, after the pressure regulating system of the ground control system moves to a working stratum with a specified depth, the ground control system sends a packer system installed on the oil pipe system to the stratum with the specified depth through the oil pipe system connected with the ground control system, the packer system is set by the ground control system according to the type of the packer system through pressure in a mode of transmitting air pressure or hydraulic pressure with the oil pipe system, and when the packer system needs to be unpacked, the ground control system releases the pressure of the packer system through the oil pipe system to unpack the packer system;
s3, the ground control system adjusts the output pressure of the pressure adjusting system, fluid is injected into the working stratum or stratum fluid in the working stratum is extracted through the oil pipe system, the fluid flow in each working stratum is controlled, and in the injection and extraction process, the pressure adjusting system output pressure in the working stratum with different depths, which is set by the packer system, can be independently adjusted through the ground control system at any time, and the injection flow and the extraction flow of the injected fluid are controlled and changed;
and S4, after the work is finished, the packer system is unpacked through the ground control system, and the oil pipe system is moved to other depths to work or wait for next work.
Through the technical measures of the four steps, especially the most critical step S3, the flow of the fluid in the layers with different depths is effectively controlled in the whole technology, the technical problem and the difficulty that the fluid is difficult to be injected in the stratum with different depths are solved, the four steps achieve the effect that the fluid can be injected or exploited according to the required flow in the layers with different depths effectively controlled, the technical effect of underground space is fully utilized, the main difference between the technical scheme and the prior art is that the fluid and the injected fluid can be simultaneously and effectively controlled in the layers with different depths according to the appointed fluid, and the method is different from the fact that the stratum exploitation and the injection of the layers with different depths in the prior art need to be carried out in batches according to the plan and the actual conditions in the stratum, and the problem existing in the prior art can be effectively solved by one set.
Compared with the prior art, the invention has the following advantages and effects:
1. the method is easy to implement and simple to operate, and can fully utilize stratum space to carry out uniform injection in stratum with different depths and control flow in stratum with different depths.
2. The system has a simple structure, monitors all stratum data in the stratum in real time, works efficiently and stably in all depths of the stratum, avoids the influence on the original stratum to the greatest extent when the system is used for injection, increases the utilization rate of stratum space, and increases the system injection amount of injection fluid in the stratum and the acquisition amount of original stratum fluid. The method has the advantages that the flow of the fluid in the layers with different depths is effectively controlled in the whole technology, the technical problem and the difficulty that the fluid is difficult to be injected in the stratum with different depths are solved, the four steps are achieved, the fluid can be injected or extracted according to the required flow in the layers with different depths in an effectively controlled mode, the technical effect of underground space is fully utilized, the technical scheme is mainly different from the prior art in that the fluid and the injection can be simultaneously and effectively carried out according to the appointed fluid in the layers with different depths, and the method is different from the prior art in that the injection and the extraction of the stratum with different depths are carried out according to the plan and the actual conditions in the stratum in a batch mode, and the problem can be effectively solved by one set of device.
3. By means of the device, the multi-stratum system injection fluid is controllable in the whole stratum flow, and the flow in a single stratum in different depths can be changed according to the actual stratum condition and the requirements at will under the condition that the total injection flow is unchanged.
4. By means of the device, stratum changes can be controlled during uniform injection, overall fluctuation conditions are small, stratum environments are stable during multi-stratum uniform injection, and uniform injection efficiency is high.
5. By means of the device, stratum interest rate is high, stratum with different depths can be injected uniformly, and injection quantity and stratum fluid production quantity are greatly increased.
Drawings
FIG. 1 is a schematic diagram of an apparatus for flow control and multi-formation fluid injection in accordance with the present invention;
FIG. 2 is a schematic diagram of a pressure regulating system apparatus according to 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 pipe, 42-downhole pressure regulation valve, 43-downhole sensor, 44-fluid injection pipe, 4 a-first pressure regulation system, 41 a-first pressure regulation pipe, 42 a-first downhole pressure regulation valve, 43 a-first downhole sensor, 44 a-first fluid injection pipe, 4 b-second pressure regulation system, 41 b-second pressure regulation pipe, 42 b-second downhole pressure regulation valve, 43 b-second downhole sensor, 44 b-second fluid injection pipe, 4 c-third pressure regulation system, 41 c-third pressure regulation pipe, 42 c-third downhole pressure regulation valve 43c, third downhole sensor, 44 c-third fluid injection pipe, 5-working formation, 51-first working formation, 52-second working formation, 53-third working formation.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
referring to fig. 1 and 2, a flow control and multi-formation fluid injection device comprises a surface control system 1, an oil pipe system 2, a packer system 3, a pressure regulating system 4 and a working formation 5; the ground control system 1 is arranged on the uppermost ground and is downwards connected with the oil pipe system 2 and the pressure regulating system 4 which are positioned in the well drilling, the packer system 3 and the pressure regulating system 4 are arranged on the oil pipe system 2, the stratum sealed by the packer system 3 is connected with the stratum through the working stratum 5 in the stratum, the ground control system 1 controls the injection of ground fluid, and the oil pipe system 2, the packer system 3 and the pressure regulating system 4 connected with the ground control system 1 control the pressure in the stratum sealed by the packer system 2 and change the stratum flow.
The oil pipe system 2 is formed by connecting standard oil pipes in the oil field 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 the stratum after perforation of the stratum section needing fluid injection, the oil pipe system 2 is also connected with a pressure regulating 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 a ground control system 1 and the oil pipe system 2.
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 which are connected in series up and down, the number of the packers in the packer system 3 is determined by the number of layers of the injected stratum, the stratum reaching a designated depth through the movement of the oil pipe system 2 is internally and then sealed, the stratum with different depths is sealed and the migration of fluid on the stratum with the layers with different depths is prevented, and the number of the packers in the packer system 3 is determined by the stratum injection number.
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, wherein the pressure of the stratum passing through the pressure regulating system 4 can be controlled by the surface control system 1, the downhole regulating valve 42 is a pressure reducing valve which can work downhole, and the output pressure of the downhole regulating valve is regulated to change the fluid flow; the pressure regulating system 4 further comprises a first pressure regulating system 4a, a second pressure regulating system 4b and a third pressure regulating system 4c, wherein the first pressure regulating system 4a comprises a first pressure regulating pipe 41a, a first downhole regulating valve 42a, a first downhole sensor 43a and a first fluid injection pipe 44a; the second pressure regulating system 4b further comprises a second pressure regulating pipe 41b, a first downhole regulating valve 42b, a second downhole sensor 43b, a first fluid injection pipe 44b; the third pressure regulating system 4c further comprises a third pressure regulating pipe 41c, a third downhole regulating valve 42c, a third downhole sensor 43c, a third fluid injection pipe 44c; the pressure regulating system 4 is installed on the oil pipe system 2 set by the packer system 3 and is connected with the surface control system 1, the first pressure regulating system 4a is installed between the first packer 31 and the second packer 32, the first downhole regulating valve 42a, the first downhole sensor (43 a) and the first fluid injection pipe 44a are installed and fixed on the oil pipe system 2 in a bracket manner, the first fluid injection pipe 44a is connected with the first downhole sensor (43 a) and is communicated with the oil pipe system 2 after the first downhole regulating valve 42a, the surface injection fluid reaches the stratum set by the first packer 31 and the second packer 32 through the oil pipe system 2 and the first downhole regulating valve 42a and the first downhole sensor 43a, the upper part of the first pressure regulating pipe 41a passes through the first packer 31 and is connected with the surface control system 1, and the lower part of the first pressure regulating pipe 41a is connected with the first downhole regulating valve 42a and the 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 (43 b) and the second fluid injection pipe 44b are installed and fixed on the oil pipe system 2 in a barrel supporting mode, the second fluid injection pipe 44b is connected with the second downhole sensor (43 b) and is communicated with the oil pipe system 2 after being connected with the second downhole regulating valve 42b, the ground injection fluid passes through the oil pipe system 2, the second downhole regulating valve 42b and the second downhole sensor 43b and reaches the stratum where the second packer 32 and the third packer 33 are set, the upper part of the second pressure regulating pipe 41b passes through the second packer 32 and the first packer 31 and is connected with the ground control system 1, and the lower part of the second pressure regulating pipe 41b is connected with the second downhole regulating valve 42b and the second downhole sensor 43 b; the third pressure regulating system 4c is arranged between the third packer 33 and the fourth packer 34, the third downhole regulating valve 42c, the third downhole sensor (43 c) and the 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 connected with the third downhole sensor (43 c) and is communicated with the oil pipe system 2 after being connected with the third downhole regulating valve 42c, the ground injection fluid reaches the stratum which is sealed by the third packer 33 and the fourth packer 34 through the oil pipe system 2, the third downhole regulating valve 42c and the third downhole sensor 43c and the third fluid injection pipe 44c, the upper part of the third pressure regulating pipe 41c passes through the third packer 33, the second packer 32 and the first packer 31 to be connected with the ground control system 1, the lower part of the 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 packer system 3 where the pressure regulating system 4 is positioned under the control of the ground control system 1 to seal the formation pressure, 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 such a way that the pressure regulating pipe 41 transmits the hydraulic pressure of the ground to change the state of the inside of the underground regulating valve body and change the output pressure of the underground regulating valve 42 so as to change the flow of injection 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 independently controlled.
Wherein the working formation 5 is the primary formation where the injected fluid flows in the subsurface, the working formation 5 comprises a first working formation 51, a second working formation 52, a third working formation 53, the working formation 5 is formed by drilling a well after perforation of the formation such as a specified depth in a setting section by the spacer system 3, the fluid injected at the surface by the surface control system 1 flows through the tubing system 2 to the working formation 5 where the packer system 3 is set, and the specific number of the working formations 5 is determined by the number of formation system injections.
Through the implementation, the pressure and the damping of the fluid in the formations with different depths of the underground packer packing section can be controlled, and compared with the conventional injection experiments, the fluid can be injected into each formation with different depths in a controlled way, so that the fluid is not injected in a large amount and intensively in a certain formation due to the difference of the conditions of each formation, and the injection is effectively carried out.
Example 2:
a method of flow control and multi-layer fluid priming comprising the steps of:
s1, determining the number of working layers according to requirements, and adjusting and installing an oil pipe system 2, a packer system 3 and a pressure adjusting system 4;
s2, after the pressure regulating system 4 of the ground control system 1 moves the oil pipe system 2 to reach the working stratum 5 with the designated depth, the ground control system 1 sends the packer system 3 installed on the oil pipe system 2 to the stratum with the designated depth through the oil pipe system 2 connected with the ground control system, the packer system 3 is set by the ground control system according to the type of the packer system 3 through pressure in a mode of air pressure or hydraulic pressure and the like transmitted by the ground control system and the oil pipe system 2, and when the packer system 3 needs to be unpacked, the ground control system 1 decompresses the packer system 3 through the oil pipe system 2 to unpack 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 in each layer of working stratum is controlled, and in the injection and extraction process, the output pressure of the pressure adjusting system 4 in the working stratum 5 with different depths, which is sealed by the packer system 3, can be independently adjusted through the ground control system 1 at any time, and the injection flow and the extraction flow of the injected fluid are controlled and changed;
and S4, after the work is finished, the packer system 3 is unpacked through the ground control system 1, and the oil pipe system 2 is moved to other depths to work or wait for next work.
The method is easy to implement and simple to operate, and can fully utilize stratum space to carry out uniform injection in stratum with different depths and control flow in stratum with different depths; the system has a simple structure, monitors all stratum data in the stratum in real time, works efficiently and stably in all depths of the stratum, avoids the influence on the original stratum to the greatest extent when the system is used for injection, increases the utilization rate of stratum space, and increases the system injection amount of injection fluid in the stratum and the acquisition amount of original stratum fluid; the method has the advantages that the flow of the fluid in the layers with different depths is effectively controlled in the whole technology, the technical problem and difficulty that the fluid is difficult to be injected into the stratum with different depths are solved, the four steps are achieved, the fluid can be injected or extracted according to the required flow in the layers with different depths effectively controlled, the technical effect of underground space is fully utilized, the technical scheme is mainly different from the prior art in that the fluid and the injection can be simultaneously and effectively carried out according to the appointed fluid in the layers with different depths, and the method is different from the prior art in that the injection and the extraction of the stratum with different depths are carried out according to the plan and the actual conditions in the stratum in batches, and the problem can be effectively solved by one set of device; by means of the device, the multi-stratum systematic injection fluid is controllable in the whole stratum flow, and the flow in a single stratum in different depths can be changed according to the actual stratum condition and the requirements under the condition that the total injection flow is unchanged as required; by means of the device, the stratum changes can be controlled during the injection, the overall fluctuation condition is small, the stratum environment is more stable during the injection of multiple strata, and the injection efficiency is higher; by means of the device, stratum interest rate is high, stratum with different depths can be injected uniformly, and injection quantity and stratum fluid production quantity are greatly increased.
Example 3:
a method for flow control and multi-formation fluid injection, comprising the steps of:
performing underground multi-layer fluid injection experiments in oilfield drilling at a depth of 1000m, wherein the device comprises a ground control system 1, an oil pipe system 2, a packer system 3, a pressure regulating system 4 and a working stratum 5; the working stratum 5 is arranged in 3 reservoirs with different depths of a downhole original stratum and comprises a first working stratum 51, a second working stratum 52 and a third working stratum 53, and a flow control and multi-stratum fluid injection method comprises the following steps:
1 according to the downhole depth adjustment of 1000m, installing an oil pipe system 2, a packer system 3 and a pressure adjustment system 4, wherein 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 adjustment system 4 comprises a first pressure adjustment system 4a, a second pressure adjustment system 4b and a third pressure adjustment system 4c.
2 the surface control system 1 moves the oil pipe system 2 to set the packer system 3 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 the first working stratum 51, the second working stratum 52 and the third working stratum 53 with the designated depth respectively.
3 the ground control system 1 adjusts the output pressure of the pressure adjusting system 4, and injects fluid into the working stratum 5 including the first working stratum 51, the second working stratum 52 and the third working stratum 53 through the oil pipe system 2 or extracts stratum original fluid in the working stratum 5, and controls the pressure of the pressure adjusting system 4 of each layer of working stratum 5 so as to control the fluid flow in the stratum, and in the injection and extraction process, the ground control system 1 can independently adjust the pressure adjusting system 4 output pressure of the working stratum 5 with different depths, which is set by the packer system 3, at any time, so that the injection flow and the extraction flow of the injected fluid can be controlled and changed.
4, after the work is finished, the packer system 3 is unpacked 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 amount in the current layer fluid system injection is about 60m 3 For 5 consecutive days, the flow data is as follows, wherein Q is the formation injection flow, Q 1 For the first working stratum flow, Q 2 For the second work placeLayer flow, Q 3 For the third working stratum flow, the flow unit is m 3 /d
Example 4:
the utility model provides a device of flow control and multi-layer fluid system annotates, this device comprises ground control system 1, oil pipe system 2, packer system 3, pressure regulation system 4, working stratum 5, its characterized in that: the drilling and recovering 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, such as a drilling machine, a fluid injection and recovery station, a booster pump and the like, and can control an oil pipe system 2, a packer system 3 and a pressure regulating system 4 which are positioned in a well drilling and are communicated with the ground, wherein the controllable injection pressure of the oil pipe system is 100 MPa; the ground control system 1 controls the oil pipe system 2 to move in the well, controls the packer system 3 to seal and work depth in the well and controls the output pressure of the pressure regulating system 4.
The oil pipe system 2 is formed by connecting a plurality of standard oil pipes in the oil field, and the pipe diameter of the oil pipe is
The oil pipe system 2 is connected with the ground control system 1, the packer system 3 and the pressure regulating system 4 are connected and installed underground, fluid can be injected into the working stratum 5 through the pressure regulating system 4 connected with the oil pipe system 2 on the ground, and the packer system 3 is set and unset through the oil pipe system 2.
The packer system 3 consists of hydraulic packers in a plurality of oil field 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 pressure relief setting or the packer releasing system 3 is pressed by the ground control system 1 and the oil pipe system 2, a through hole which can be penetrated by a control pipeline such as a pressure regulating pipe 41 is reserved in the packer system 3, and after the hydraulic packer passes through the designated packer, the packer system 3 sets the well and forms a working stratum 5; the first packer 31 and the second packer 32 are set to form a first working stratum 51, the second packer 32 and the third packer 33 are set to form a second working stratum 52, the third packer 33 and the fourth packer 34 are set to form a third working stratum 53, the packer system 3 guarantees independence in working strata 5 with different depths, connection of non-packer positions in drilling is blocked when the packers at different layers of the packer system are set, and fluid can be prevented from streaming between the different layers to affect multi-layer system injection and flow control. The pressure regulating system 4 comprises a first pressure regulating system 4a, a second pressure regulating system 4b and a third pressure regulating system 4c with different depths in the stratum, and consists of a pressure regulating pipe 41, a downhole pressure regulating valve 42, a downhole sensor 43 and a fluid injection pipe 44, wherein the pressure regulating system 4 is armored and installed on the oil pipe system 2 to monitor downhole data and regulate the pressure in the working stratum 5 where the pressure regulating system 4 is positioned, 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 tube 41 includes a first pressure regulating tube 41a, a second pressure regulating tube 41b, and a third pressure regulating tube 41c; the downhole pressure regulating valve 42 includes a first downhole pressure regulating valve 42a, a second downhole pressure regulating valve 42b, a third downhole pressure regulating valve 42c; the downhole sensors 43 include a first downhole sensor 43a, a second downhole sensor 43b, a third downhole sensor 43c; the fluid injection tube 44 includes a first fluid injection tube 44a, a second fluid injection tube 44b, and a third fluid injection tube 44c. The pressure regulating pipe 41 is made of 316L stainless steel with the pipe diameter of 1/4", photoelectric, pneumatic and hydraulic signals can be transmitted, the pressure regulating pipe 41 is fixed on the oil pipe system 2 in a clamping manner and the like, a pressure regulating system 4 and the ground control system 1 can be communicated, instructions of the ground control system 1 are transmitted to the pressure regulating system 4 through the pressure regulating pipe 41, and monitoring data of the pressure regulating system 4 are fed back to the ground control system 1 through the pressure regulating 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 is injected into a working stratum after passing through the underground pressure regulating valves 42 of the oil pipe system 2 and the pressure regulating system 4; the downhole sensor 43 uses an electronic sensor, transmits data to the surface control system 1 through the pressure regulating pipe 41, can monitor downhole temperature, pressure, PH, flow, OPR, conductance and other data, and the surface control system 1 regulates the output pressure of the downhole pressure regulating valve 42 according to the monitoring data of each depth stratum; the fluid injection pipe 44 is an outlet of the pressure regulating system 4 and the surface control system 1 for injecting fluid into the working stratum 5, and the injected fluid is injected into the working stratum 5 at a set flow rate after passing through the surface control system 1 and the oil pipe system 2 and then regulating the pressure by the pressure regulating system 4.
The working stratum 5 comprises a first working stratum 51, a second working stratum 52 and a third working stratum 53, the working strata 5 are arranged at different depths in the ground and are main reservoirs for injecting fluid, and the working strata 5 increase the mobility of the fluid in the stratum through perforation during multi-stratum system injection.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A flow control and multi-stratum fluid priming device comprises a ground control system (1), an oil pipe system (2), a packer system (3), a pressure regulating system (4) and a working stratum (5); the method is characterized in that: the ground control system (1) is arranged on the uppermost ground and is downwards connected with the oil pipe system (2) and the pressure regulating system (4) which are positioned in the drilling well, the packer system (3) and the pressure regulating system (4) are arranged on the oil pipe system (2), the stratum sealed by the packer system (3) is connected with the stratum through the working stratum (5) in the stratum sealed by the drilling well, the ground control system (1) controls the oil pipe system (2) connected with the ground fluid injection, the packer system (3) and the pressure regulating system (4) to control the pressure in the stratum sealed by the packer system (2) and change the stratum flow;
the oil pipe system (2) is formed by connecting standard oil pipes in the oil field 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 the stratum after perforation of a stratum section needing fluid injection, the oil pipe system (2) is also connected with a pressure regulating 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 a ground control system (1);
the packer system (3) consists 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) which are connected in series up and down, the number of the packers in the packer system (3) is determined by the number of layers of formations to be filled, the back of the formations reaching a designated depth is sealed and sealed by the movement of the oil pipe system (2), and the migration of fluids on the formations at different depth layers is prevented, and the number of the packers in the packer system (3) is determined by the number of the layers to be filled;
the pressure regulating system (4) consists of a pressure regulating pipe (41), an underground regulating valve (42) and an underground sensor (43) fluid injection pipe (44), is controlled by the ground control system (1) and can change the pressure of stratum fluid passing through the pressure regulating system (4), and the underground regulating valve (42) is a pressure reducing valve capable of working underground and changes the fluid flow by adjusting the output pressure of the pressure reducing valve; the pressure regulating system (4) further comprises a first pressure regulating system (4 a), a second pressure regulating system (4 b) and a third pressure regulating system (4 c), wherein the first pressure regulating system (4 a) comprises a first pressure regulating pipe (41 a), a first downhole regulating valve (42 a), a first downhole sensor (43 a) and a first fluid injection pipe (44 a); the second pressure regulating system (4 b) further comprises a second pressure regulating pipe (41 b), a first downhole regulating valve (42 b), a second downhole sensor (43 b) and a first fluid injection pipe (44 b); the third pressure regulating system (4 c) further comprises a third pressure regulating pipe (41 c), a third downhole regulating valve (42 c), a third downhole sensor (43 c) and a third fluid injection pipe (44 c); the pressure regulating system (4) is arranged on an oil pipe system (2) which is set by the packer system (3) and is connected with the ground control system (1), the first pressure regulating system (4 a) is arranged between a first packer (31) and a second packer (32), the first downhole regulating valve (42 a), a first downhole sensor (43 a) and a first fluid injection pipe (44 a) are fixedly arranged on the oil pipe system (2) in a supporting cylinder mode, the first fluid injection pipe (44 a) is connected with the first downhole sensor (43 a), the first downhole regulating valve (42 a) is connected with the oil pipe system (2) after passing through the oil pipe system (2), the first downhole regulating valve (42 a), the first downhole sensor (43 a) and the first fluid injection pipe (44 a) reach the first packer (31) and the second packer (32), the upper part of the first pressure regulating pipe (41 a) passes through the first downhole control system (31) and is connected with the first downhole regulating valve (41 a) and the first downhole regulating valve (43 a) is connected with the first downhole control system; the second pressure regulating system (4 b) is arranged between the second packer (32) and the third packer (33), the second downhole regulating valve (42 b), the second downhole sensor (43 b) and the second fluid injection pipe (44 b) are fixedly arranged on the oil pipe system (2) in a supporting cylinder mode, the second fluid injection pipe (44 b) is connected with the second downhole sensor (43 b) and the second downhole regulating valve (42 b) and then is communicated with the oil pipe system (2), the ground injection fluid passes through the oil pipe system (2), the second downhole regulating valve (42 b) and the second downhole sensor (43 b) and reaches the stratum where the second packer (32) and the third packer (33) are set, the upper part of the second pressure regulating pipe (41 b) passes through the second packer (32) and the first packer (31) and is connected with the ground control system (1), and the lower part of the second pressure regulating pipe (41 b) is connected with the second downhole regulating valve (42 b) and the second downhole regulating valve (43 b); the third pressure regulating system (4 c) is arranged between a third packer (33) and a fourth packer (34), the third downhole regulating valve (42 c), the third downhole sensor (43 c) and the third fluid injection pipe (44 c) are fixedly arranged on the oil pipe system (2) in a supporting cylinder mode, the third fluid injection pipe (44 c) is connected with the third downhole sensor (43 c), the third downhole regulating valve (42 c) is communicated with the oil pipe system (2) after being communicated with the ground injection fluid, the ground injection fluid passes through the oil pipe system (2), the third downhole regulating valve (42 c), the third downhole sensor (43 c) and the third fluid injection pipe (44 c) reach the stratum sealed by the third packer (33) and the fourth packer (34), the upper part of the third pressure pipe (41 c) passes through the third packer (33), the second packer (32) and the first packer (31) is connected with the ground control system (1), the lower part of the third pressure pipe (41 c) is connected with the third downhole regulating valve (42 c) and the ground control system (4 c) can be changed at the ground pressure regulating system (4 c), the pressure regulating system (4) controls the pressure of the underground regulating valve (42) through a pressure regulating pipe (41) connected with the ground control system (1), the pressure regulating valve (42) regulates the pressure in such a way that the pressure regulating pipe (41) transmits the hydraulic pressure of the ground to change the state inside the underground regulating valve body so as to change the output pressure of the underground regulating valve (42) and further change the flow of injection fluid in the stratum, and the first pressure regulating system (4 a), the second pressure regulating system (4 b) and the third pressure regulating system (4 c) can be independently controlled.
2. A flow control and multi-formation fluid priming apparatus according to claim 1, wherein: the working formation (5) is the main formation where injection fluid flows 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 being set by a spacer system (3) after being perforated by a formation of a specified depth, the fluid injected from the ground by the ground control system (1) flows through an oil pipe system (2) to the working formation (5) set by a packer system (3), and the specific number of the working formations (5) is determined by the total injection number of the formations.
3. A method of flow control and multi-formation fluid priming using the flow control and multi-formation fluid priming apparatus of claim 1, wherein: the method comprises the following steps:
s1, determining the number of working layers according to requirements, and adjusting an oil pipe installation system (2), a packer system (3) and a pressure adjusting system (4);
s2, after the pressure regulating system (4) reaches the working stratum (5) with the designated depth, the ground control system (1) sends the packer system (3) installed on the oil pipe system (2) to the stratum with the designated depth through the oil pipe system (2) connected with the ground control system, the packer system (3) is set by the ground control system according to the type of the packer system (3) through pressure in a mode of air pressure or hydraulic pressure and the like transmitted by the oil pipe system (2), and when the packer system (3) needs to be unpacked, the ground control system (1) releases the pressure of the packer system (3) through the oil pipe system (2) to unpack 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 layer of working stratum is controlled, and the injection flow and the extraction flow of the injected fluid can be changed by independently adjusting the output pressure of the pressure adjusting system (4) in the working stratum (5) with different depths, which is sealed by the packer system (3) at any time through the ground control system (1) in the injection and extraction process;
and S4, after the work is finished, the packer system (3) is unpacked 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210518147.4A CN114876422B (en) | 2022-05-12 | 2022-05-12 | Flow control and multi-layer fluid unification device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210518147.4A CN114876422B (en) | 2022-05-12 | 2022-05-12 | Flow control and multi-layer fluid unification device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114876422A CN114876422A (en) | 2022-08-09 |
| CN114876422B true CN114876422B (en) | 2023-06-02 |
Family
ID=82675071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210518147.4A Active CN114876422B (en) | 2022-05-12 | 2022-05-12 | Flow control and multi-layer fluid unification device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114876422B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1065737A (en) * | 1975-04-18 | 1979-11-06 | Earl B. Shetler (Sr.) | Well system |
| JPH03161610A (en) * | 1989-11-20 | 1991-07-11 | Oyo Corp | Pressure variable type water pouring device into boring pit |
| CN103939064A (en) * | 2014-04-16 | 2014-07-23 | 西南石油大学 | Simulation device and method used for researching two-layer supercritical CO2 injection nozzle flow characteristics |
| CN110924911A (en) * | 2019-12-11 | 2020-03-27 | 东北石油大学 | Rechargeable intelligent injection mandrel in pit |
| CN112240185A (en) * | 2020-10-26 | 2021-01-19 | 中国石油天然气股份有限公司 | Injection regulating assembly, injection allocator, and polymer injection dynamic blending device and process |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5335732A (en) * | 1992-12-29 | 1994-08-09 | Mcintyre Jack W | Oil recovery combined with injection of produced water |
| CA2485035C (en) * | 2003-11-03 | 2007-04-10 | Donald D. Reitz | Gas recovery apparatus, method and cycle having a three chamber evacuation phase and two liquid extraction phases for improved natural gas production |
| US8336625B2 (en) * | 2004-11-03 | 2012-12-25 | Halliburton Energy Services, Inc. | Fracturing/gravel packing tool with variable direction and exposure exit ports |
| US7428924B2 (en) * | 2004-12-23 | 2008-09-30 | Schlumberger Technology Corporation | System and method for completing a subterranean well |
| EP1875041A2 (en) * | 2005-04-05 | 2008-01-09 | Raymond P. Murphy | Well bore fluid redistribution and fluid disposal |
| RU2495235C1 (en) * | 2012-03-06 | 2013-10-10 | Общество с ограниченной ответственностью Научно-производственная фирма "Пакер" | Method and device for controlled pumping down to formations |
| RU2545204C1 (en) * | 2014-03-26 | 2015-03-27 | Открытое акционерное общество "Татнефть" имени В.Д. Шашина | System of cluster water injection to reservoir |
| CN104695917B (en) * | 2015-01-12 | 2018-09-11 | 陈爱民 | Intelligent watering system |
| CN105239975A (en) * | 2015-10-30 | 2016-01-13 | 中国石油天然气股份有限公司 | Monitoring system for water injection state of each layer of multi-layer water injection well |
| CN110924906B (en) * | 2016-10-20 | 2021-11-09 | 中国石油化工股份有限公司 | Gas lift well liquid discharge simulation test device |
| WO2019148279A1 (en) * | 2018-01-30 | 2019-08-08 | Ncs Multistage Inc. | Method of optimizing operation one or more tubing strings in a hydrocarbon well, apparatus and system for same |
| CN110439552A (en) * | 2019-09-04 | 2019-11-12 | 中国科学院武汉岩土力学研究所 | A kind of multiphase flow high-fidelity sampling device and method based on drilling well |
| CN110541702B (en) * | 2019-10-14 | 2024-04-05 | 中油奥博(成都)科技有限公司 | Underground fluid distribution monitoring system and method based on distributed optical fiber sensing |
| CN111852445B (en) * | 2020-07-07 | 2023-09-15 | 中国石油大学(华东) | Intelligent oilfield injection and production real-time optimization and regulation system and method |
| CN113685175B (en) * | 2021-08-18 | 2023-09-15 | 中国科学院武汉岩土力学研究所 | Method and device for underground depth-fixing in-situ comprehensive experiment |
-
2022
- 2022-05-12 CN CN202210518147.4A patent/CN114876422B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1065737A (en) * | 1975-04-18 | 1979-11-06 | Earl B. Shetler (Sr.) | Well system |
| JPH03161610A (en) * | 1989-11-20 | 1991-07-11 | Oyo Corp | Pressure variable type water pouring device into boring pit |
| CN103939064A (en) * | 2014-04-16 | 2014-07-23 | 西南石油大学 | Simulation device and method used for researching two-layer supercritical CO2 injection nozzle flow characteristics |
| CN110924911A (en) * | 2019-12-11 | 2020-03-27 | 东北石油大学 | Rechargeable intelligent injection mandrel in pit |
| CN112240185A (en) * | 2020-10-26 | 2021-01-19 | 中国石油天然气股份有限公司 | Injection regulating assembly, injection allocator, and polymer injection dynamic blending device and process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114876422A (en) | 2022-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10428632B2 (en) | Method, system, and optimization technique to improve oil reservoir recovery in the Water-Alternating-Gas injection process by using downhole control valves (WAG-CV) | |
| CN106194131A (en) | It is spaced CO between multistage fracturing horizontal well seam2oil flooding method | |
| CN111852445B (en) | Intelligent oilfield injection and production real-time optimization and regulation system and method | |
| CN111236906B (en) | Method for improving fracture complexity through normal-pressure or deep shale gas main fracture deep plugging | |
| CN106837290B (en) | The asynchronous note CO of the different well of grouping of symmetrical cloth seam2Oil production method | |
| Hu et al. | Methane extraction from abandoned mines by surface vertical wells: a case study in China | |
| CN109209350A (en) | A kind of prediction technique of the complete well fracture pressure of coal seam inclined shaft well-case perforating | |
| CN107269255B (en) | Method and device for exploiting compact oil through inter-cluster oil displacement | |
| CN105239984A (en) | Method for controlling coal mine underground fracturing crack propagation | |
| WO2022082953A1 (en) | Grouting system and grouting method based on pressure-adjustable special grouting moving cavity | |
| CN109882138A (en) | Flood suction replaces oily quarrying apparatus and method | |
| CA2089800C (en) | Method and apparatus for improved oil recovery of oil and bitumen using dual completion cyclic steam stimulation | |
| CN114876422B (en) | Flow control and multi-layer fluid unification device and method | |
| CN106869888B (en) | Improve the method for low-permeability oil deposit waterflooding effect | |
| Zuo et al. | Experimental study on gas adsorption and drainage of gas-bearing coal subjected to tree-type hydraulic fracturing | |
| CN202745838U (en) | Co-well water-injection and water-extraction process tubular column | |
| CN110344801B (en) | Fracturing operation method for combustible ice exploitation, exploitation method and exploitation system | |
| CN113982589B (en) | Temperature control method and system for in-situ mining of oil-rich coal | |
| CN211777365U (en) | Rock expansion device of circulated construction liquid without fracturing stratum | |
| RU2741644C1 (en) | Method of development of hard-to-recover hydrocarbon deposits | |
| RU2425961C1 (en) | Well operation method | |
| CN205297512U (en) | Shale gas raising output device | |
| RU2630318C1 (en) | Development method of tight oil reservoirs by cyclic pumping of carbon dioxide | |
| CN211422612U (en) | Layered gas injection pipe column | |
| RU2681758C1 (en) | Method of developing super-viscous oil field |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |