An oil production apparatus and an oil production method

Abstract

This application relates to the field of oilfield development technology, and particularly to an oil production equipment and method. The oil production equipment includes a support base, packers, a water injection oil production assembly, and a controller. The support base is connected to the water injection oil production assembly. Multiple water injection oil production assemblies are arranged sequentially along the height direction and connected to each other. Each water injection oil production assembly has an oil inlet and a water outlet. The oil inlet allows crude oil from the outside to enter, and the water outlet supplies water to leave the water injection oil production assembly and inject it into the oil layer. Multiple packers are also present, with two adjacent packers forming a flow cavity with one water injection oil production assembly. The oil inlet and water outlet of each water injection oil production assembly are connected to the same flow cavity, and adjacent flow cavities are relatively sealed. The controller controls the opening and closing of the oil inlet and the water outlet. The oil production equipment of this application can improve the oil production efficiency.

Description

Technical Field

[0001] This application relates to the field of oilfield development technology, and in particular to an oil production equipment and method. Background Technology

[0002] Oil extraction equipment is a large machine used to extract crude oil from underground by drilling into the ground.

[0003] Oil extraction equipment generally includes a water injection system and an oil production system. The water injection system increases the pressure of the underground oil reservoir, while the oil production system extracts the crude oil from the ground.

[0004] In related technologies, due to the uneven distribution of crude oil in the formation, water injection into the underground oil layer cannot generate sufficient pressure in the area where the crude oil is located to extract the crude oil, resulting in poor extraction efficiency. Summary of the Invention

[0005] In view of this, this application provides an oil extraction device and an oil extraction method to improve the efficiency of crude oil extraction.

[0006] Specifically, the following technical solutions are included:

[0007] The first aspect of this application provides an oil production device, which includes a support base, a packer, a water injection oil production assembly, and a controller, wherein...

[0008] The support base is connected to the water injection oil production assembly;

[0009] The number of water injection oil production components is multiple. The multiple water injection oil production components are arranged sequentially and connected along the height direction. Each water injection oil production component has an oil inlet and a water outlet. The oil inlet is used to allow crude oil from the outside to enter, and the water outlet is used to supply water to leave the water injection oil production component and inject it into the oil layer.

[0010] The number of the sealing devices is multiple, and two adjacent sealing devices can cooperate with a water injection oil production component to form a flow cavity. The oil inlet and water outlet of each water injection oil production component are connected to the same flow cavity, wherein adjacent flow cavities are relatively sealed.

[0011] The controller is used to control the opening and closing of the oil inlet and the water outlet.

[0012] Optionally, the oil production equipment includes a connector that connects the support base and the water injection oil production assembly located at the highest position.

[0013] Optionally, the oil production equipment includes a pump and a first wellhead, the pump being mounted on the support and connected to the first wellhead and the water injection oil production assembly located at the highest position.

[0014] Optionally, the oil production equipment includes a second tree, which is connected to a water injection oil production assembly located at the highest position.

[0015] Optionally, the oil production equipment further includes a sealing part that seals the end of the water injection oil production assembly located at the lowest position that is away from the water injection oil production assembly connected thereto.

[0016] Optionally, the sealing part includes an oil pipe and a plug, the oil pipe being connected to the water injection oil production assembly, and the plug sealing the end of the oil pipe away from the water injection oil production assembly.

[0017] Optionally, the water injection oil production assembly includes a housing, a one-way valve, and a plugging component. The housing has a first channel, a second channel, an oil inlet, and a water outlet. The first channel extends through the housing along the height direction. The oil inlet and the water outlet are arranged along the height direction and are respectively connected to the first channel. The water outlet connects the first channel and the second channel. One end of the second channel extends to the lower end of the housing. The plugging component is located in the first channel and is movable along the height direction to seal the oil inlet and the water outlet, and to relatively seal the second channel and the first channel.

[0018] Optionally, the oil production equipment includes a casing pressure valve, which connects the support base and the water injection oil production assembly located at the highest position.

[0019] A second aspect of this application provides an oil recovery method, the oil recovery method comprising:

[0020] The sealing part, the first water injection and oil production assembly, the first packer, the second water injection and oil production assembly, the second packer, the third water injection and oil production assembly, and the third packer are sequentially driven into the pipe pile and assembled in the order of driving.

[0021] The expansion of the first, second, and third sealing devices is controlled to cooperate with the pipe pile to form a first cavity, a second cavity, and a third cavity. The outlet and inlet of the first water injection oil production component are both located in the first cavity, the outlet and inlet of the second water injection oil production component are both located in the second cavity, and the outlet and inlet of the third water injection oil production component are both located in the third cavity. The first cavity is connected to the first oil layer, the second cavity is connected to the second oil layer, and the third cavity is connected to the third oil layer.

[0022] Connect the second wellhead and the third water injection oil production unit, and sequentially open the outlets of the first water injection oil production unit, the second water injection oil production unit, and the third water injection oil production unit to inject water into the first oil layer, the second oil layer, and the third oil layer in sequence.

[0023] After a first set time, the outlets of the first, second, and third water injection oil production components are closed, and the inlets of the first, second, and third water injection oil production components are opened to release crude oil from the first, second, and third oil layers.

[0024] The second wellhead is removed, and an oil pump is lowered to connect the third water injection oil production assembly and the first wellhead.

[0025] The oil pump is controlled to operate in order to extract crude oil from the first oil layer, the second oil layer and the third oil layer.

[0026] Optionally, the first wellhead and the oil pump are removed, and the second wellhead and the third water injection oil production assembly are connected.

[0027] The outlets of the first water injection oil production assembly, the second water injection oil production assembly, and the third water injection oil production assembly are opened in sequence to inject water into the first oil layer, the second oil layer, and the third oil layer in sequence.

[0028] After a second set time, the outlets of the first, second, and third water injection oil production components are closed, and the inlets of the first, second, and third water injection oil production components are opened to release crude oil from the first, second, and third oil layers.

[0029] The second wellhead is removed, and an oil pump is lowered to connect the third water injection oil production assembly and the first wellhead.

[0030] The oil pump is controlled to operate in order to extract crude oil from the first oil layer, the second oil layer and the third oil layer.

[0031] The beneficial effects of the technical solution provided in this application include at least the following: the support base can be used to install water injection or oil extraction devices, enabling the oil extraction equipment to have the conditions for water injection or oil extraction. The water injection oil extraction component can be used to introduce surface water into the oil layer and also to extract crude oil from the oil layer to the surface, simultaneously possessing the functions of water injection and oil extraction, which can reduce the occupation of surface space. The flow cavity formed by two adjacent sealing devices and a water injection oil extraction component can perform water injection and oil extraction operations on different oil layers. At the same time, the adjacent flow cavities are relatively sealed, which helps to improve the independence of water injection and oil extraction between different oil layers, thereby improving the pressure generated when water is injected into different oil layers, and helping the crude oil in different oil layers to obtain a matching water injection pressure, thereby improving the extraction effect. The controller is used to control the opening and closing of the oil inlet and water outlet, which helps the oil extraction equipment of this application to stagger the crude oil extraction and water injection operations of different oil layers, thereby improving the independence of water injection and oil extraction of different oil layers, which is conducive to improving the extraction effect. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of an oil extraction device provided in an embodiment of this application;

[0034] Figure 2 This is a partial cross-sectional schematic diagram of a water injection oil production assembly provided in an embodiment of this application;

[0035] Figure 3 A cross-sectional schematic diagram from another direction for an embodiment of this application;

[0036] Figure 4 This is a schematic diagram of the layout of oil production equipment for an oil production method provided in an embodiment of this application;

[0037] Figure 5 A schematic flowchart of an oil recovery method provided in an embodiment of this application;

[0038] Figure 6 This is a partial flowchart illustrating another oil extraction method provided in an embodiment of this application.

[0039] The reference numerals in the figure are respectively:

[0040] 100, First oil layer; 200, Second oil layer; 300, Third oil layer;

[0041] 1. Support base;

[0042] 2. A barrier device; 21. A first barrier device; 22. A second barrier device; 23. A third barrier device;

[0043] 3. Water injection oil production assembly; 31. First water injection oil production assembly; 32. Second water injection oil production assembly; 33. Third water injection oil production assembly; 311. Housing; 312. Check valve; 313. Sealing component; 301. First channel; 302. Second channel; 303. Water outlet; 304. Oil inlet;

[0044] 4. Connecting part;

[0045] 51. Oil pump; 52. First wellhead;

[0046] 6. Second oil well tree;

[0047] 71. Oil pipe; 72. Plug;

[0048] 8. Pressure valve;

[0049] 9. Oil pipe piles.

[0050] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0052] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0053] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0054] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0055] The first aspect of this application provides an oil extraction device, such as... Figure 1 As shown, the oil production equipment includes a support base 1, a packer device 2, a water injection oil production assembly 3, and a controller.

[0056] Support 1 is connected to water injection oil production assembly 3;

[0057] There are multiple water injection oil production components 3, which are arranged sequentially and connected along the height direction. Each water injection oil production component 3 has an oil inlet 304 and a water outlet 303. The oil inlet 304 is used to allow crude oil from the outside to enter, and the water outlet 303 supplies water to leave the water injection oil production component 3 and inject it into the oil layer.

[0058] There are multiple packer devices 2. Two adjacent packer devices 2 can cooperate with a water injection oil production component 3 to form a flow cavity. The oil inlet 304 and water outlet 303 of each water injection oil production component 3 are connected to the same flow cavity. The adjacent flow cavities are relatively sealed.

[0059] The controller is used to control the opening and closing of the oil inlet 304 and the water outlet 303.

[0060] Understandably, the support base 1 can be used to install water injection or oil extraction devices, enabling the oil extraction equipment to perform either. The water injection and oil extraction assembly 3 can be used to introduce surface water into the oil layer and to extract crude oil from the oil layer to the surface, simultaneously possessing water injection and oil extraction functions, thus reducing the occupation of surface space. The two adjacent sealing devices 2 can cooperate with a water injection and oil extraction assembly 3 to form a flow cavity, allowing for water injection and oil extraction operations on different oil layers. The relatively sealed adjacent flow cavities improve the independence of water injection and oil extraction between different oil layers, thereby enhancing the pressure generated during water injection in different oil layers. This facilitates obtaining matching water injection pressures for crude oil in different oil layers, thereby improving extraction efficiency. The controller is used to control the opening and closing of the oil inlet 304 and the water outlet 303, allowing the oil extraction equipment of this application to stagger the crude oil extraction and water injection operations of different oil layers, further improving the independence of water injection and oil extraction in different oil layers, thus enhancing extraction efficiency.

[0061] In this embodiment, two adjacent sealing devices 2 and a water injection and oil production assembly 3 can form an annular flow cavity, and the opening of the flow cavity is located on the outside, which can communicate with the oil layer to realize water injection and oil production.

[0062] In this embodiment, the support base 1 can be used to install a tree, which can inject water into the water injection production assembly 3 and supply water to the flow chamber through the water injection production assembly 3, injecting it into the oil layer. The support base 1 can also be used to install a pumping pump 51, which can generate negative pressure at the water injection production assembly 3 to extract crude oil remaining in the oil layer, thereby improving the extraction efficiency.

[0063] In this embodiment, the packer 2 can be a suspended packer, a sheathed packer, or a layered isolation packer. The packer 2 at the highest position can be a sheathed packer or a drop-down suspended packer, while packers at other positions can be layered isolation packers. The sheathed packer can be a hydraulically seated packer, and its fixing method can be rigid anchoring (anchor structure) or soft anchoring (self-anchoring of the seal). The sheathed packer operates at a pressure of 70 MPa and a temperature of 150°C. The layered isolation packer is an expansion packer, and its fixing method can be soft anchoring or self-anchoring of the seal.

[0064] In this embodiment, the water injection oil production component 3 can be connected sequentially along the height direction.

[0065] In this embodiment of the application, the number of water injection oil production components 3 can be 3, and the number of packing devices 2 can be 4.

[0066] In this embodiment of the application, the adjacent flow chambers are relatively sealed, which means that the water and crude oil in the adjacent flow chambers cannot flow to each other by means of the sealing device 2, but need to flow through the corresponding water injection and oil production components 3.

[0067] In some embodiments of this application, such as Figure 4 As shown, the oil production equipment includes a connector 4, which connects to a support base 1 and a water injection oil production component 3 located at the highest position.

[0068] Understandably, the connector 4 facilitates the connection of the water injection and oil production components 3 to inject water into the oil layer or extract crude oil from the oil layer.

[0069] In this embodiment of the application, the insertion part 4 can be a cannula.

[0070] In some embodiments of this application, the oil production equipment includes a pumping unit 51 and a first tree of production 52. The pumping unit 51 is mounted on a support base 1 and is connected to the first tree of production 52 and the water injection oil production assembly 3 located at the highest position.

[0071] Understandably, the pump 51 can push the crude oil located in the water injection production assembly 3, allowing the crude oil in the oil layer to be successively brought to the surface. The first production tree 52 can be used to distribute the flow of crude oil to facilitate crude oil processing.

[0072] In this embodiment, the first wellhead tree 52 can be a 70MPa wellhead ... 70MPa wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead wellhead

[0073] In some embodiments of this application, the oil production equipment includes a second treehouse 6, which is connected to the water injection oil production assembly 3 located at the highest position.

[0074] Understandably, the second tree 6 can distribute water into the water injection production assembly 3. The water enters the water injection production assembly 3 from the second tree 6 and enters the flow chamber at the outlet 303 of the water injection production assembly 3.

[0075] In some embodiments of this application, such as Figure 4 As shown, the oil production equipment also includes a sealing part, which seals the end of the water injection oil production component 3 located at the lowest position that is away from the water injection oil production component 3 connected to it.

[0076] Understandably, the sealing part can form a seal on the connected water injection oil production assembly 3 to prevent water or crude oil from leaking from the water injection oil production assembly 3 located at the lowest position.

[0077] In some embodiments of this application, the sealing part includes an oil pipe 71 and a plug 72. The oil pipe 71 is connected to the water injection oil production assembly 3, and the plug 72 seals the end of the oil pipe 71 away from the water injection oil production assembly 3.

[0078] Understandably, tubing 71 provides a location for installing plug 72. Plug 72, located at the end of tubing 71, serves as a seal to prevent crude oil and water from leaking from the lowest-positioned water injection production assembly 3, thus improving the sealing performance of the water injection production assembly 3.

[0079] In some embodiments of this application, such as Figure 2 and Figure 3 As shown, the water injection oil production assembly 3 includes a housing 311, a one-way valve 312, and a sealing member 313. The housing 311 has a first channel 301, a second channel 302, an oil inlet 304, and a water outlet 303. The first channel 301 extends through the housing 311 along the height direction. The oil inlet 304 and the water outlet 303 are arranged along the height direction and are respectively connected to the first channel 301. The water outlet 303 connects the first channel 301 and the second channel 302. One end of the second channel 302 extends to the lower end of the housing 311. The sealing member 313 is located inside the first channel 301 and can move along the height direction to seal the oil inlet 304 and the water outlet 303, and relatively seal the second channel 302 and the first channel 301.

[0080] Understandably, the first channel 301 allows crude oil located in the flow chamber to enter through the inlet 304, and water located in the water injection oil production assembly 3 to pass through and enter the flow chamber through the outlet 303, thus facilitating water injection and oil production operations. The one-way valve 312 improves the stability of crude oil entering the water injection oil production assembly 3, reducing the possibility of crude oil backflow. The second channel 302 allows water and crude oil to pass through the water injection oil production assembly 3, facilitating the downward spread of water and the upward attraction of crude oil by devices such as the oil pump 51, thus promoting connectivity between adjacent water injection oil production assemblies 3. When the sealing element 313 relatively seals the second channel 302 and the first channel 301, it helps improve the operational independence between different water injection oil production assemblies 3.

[0081] In this embodiment, the water outlet 303 and the oil inlet 304 are located on one side of the housing 311. When the orthographic projection of the water outlet 303 is completely located on the sealing member 313, the sealing member 313 can seal the water outlet 303; when the orthographic projection of the oil inlet 304 is completely located on the sealing member 313, the sealing member 313 can seal the water outlet 303.

[0082] In this embodiment, the flow direction of the one-way valve 312 is from the outside to the first channel 301.

[0083] In this embodiment of the application, the two ends of the first channel 301 are distributed along the height direction at both ends of the housing 311, and one end of the second channel 302 extends to one end of the housing 311, while the other end is connected to the first channel 301.

[0084] In some embodiments of this application, such as Figure 4 As shown, the oil production equipment includes a casing pressure valve 8, which connects to a support base 1 and a water injection oil production assembly 3 located at the highest position.

[0085] Understandably, the casing pressure valve 8 can control the crude oil pressure or water injection pressure entering the water injection oil production component 3, which is beneficial for the oil production equipment to carry out circulating water injection and oil production, thereby improving the oil production effect.

[0086] The second aspect of this application provides an oil extraction method, such as... Figure 5 As shown, the oil extraction methods include:

[0087] 101: Sequentially lower the sealing part, the first water injection and oil production assembly 31, the first packer 21, the second water injection and oil production assembly 32, the second packer 22, the third water injection and oil production assembly 33, and the third packer 23 into the pipe pile 9, and assemble them in the order of lowering;

[0088] 102: Control the expansion of the first sealing device 21, the second sealing device 22 and the third sealing device 23 to cooperate with the pipe pile 9 to form a first cavity, a second cavity and a third cavity, wherein the outlet 303 and the inlet 304 of the first water injection oil production component 31 are both located in the first cavity, the outlet 303 and the inlet 304 of the second water injection oil production component 32 are both located in the second cavity, and the outlet 303 and the inlet 304 of the third water injection oil production component 33 are both located in the third cavity. The first cavity is connected to the first oil layer 100, the second cavity is connected to the second oil layer 200, and the third cavity is connected to the third oil layer 300.

[0089] 103: Connect the second wellhead 6 and the third water injection oil production assembly 33, and sequentially open the outlet 303 of the first water injection oil production assembly 31, the outlet 303 of the second water injection oil production assembly 32 and the outlet 303 of the third water injection oil production assembly 33 to inject water into the first oil layer 100, the second oil layer 200 and the third oil layer 300 in sequence;

[0090] 104: After a first set time, close the outlet 303 of the first water injection oil production component 31, the outlet 303 of the second water injection oil production component 32, and the outlet 303 of the third water injection oil production component 33, and open the inlet 304 of the first water injection oil production component 31, the inlet 304 of the second water injection oil production component 32, and the inlet 304 of the third water injection oil production component 33 to release crude oil from the first oil layer 100, the second oil layer 200, and the third oil layer 300.

[0091] 105: Remove the second production tree 6 and lower the oil pump 51 to connect the third water injection production assembly 33 and the first production tree 52;

[0092] 106: Control the operation of the oil pump 51 to extract crude oil from the first oil layer 100, the second oil layer 200 and the third oil layer 300.

[0093] In this embodiment of the application, the method specifically includes:

[0094] Run 71 tubing columns, perform well cleaning, scraping, and circulation flushing.

[0095] The components are installed sequentially from bottom to top: plug 72, first water injection oil production assembly 31, first packer 21, second water injection oil production assembly 32, second packer 22, third water injection oil production assembly 33, third packer 23, sleeve pressure valve, and support seat 1. Adjacent devices and components are fixedly connected by oil pipes 71. The first water injection oil production assembly 31 corresponds to the first oil layer 100, the second water injection oil production assembly 32 corresponds to the second oil layer 200, and the third water injection oil production assembly 33 corresponds to the second oil layer 200 and is placed in the middle of the oil layer.

[0096] The design pressure is applied to the first packer 21, the second packer 22 and the third packer 23. The pressure causes the first packer 21, the second packer 22 and the third packer 23 to expand and adhere tightly to the inner wall of the casing, so that the first oil layer 100 and the second oil layer 200, and the second oil layer 200 and the third oil layer 300 form independent spaces that do not interfere with each other.

[0097] Set and seal the well, install the wellhead and the second production tree 6.

[0098] According to the relevant parameters of the wavecode communication, the water injection and oil production component 3 corresponding to the oil layer is started at a timed interval or the wavecode opens the outlet 303 of the third water injection and oil production component 33. According to the injection volume, pressure and injection days set by the geological conditions, the wavecode controls the injection of large volume and high pressure water (3m³) into the low-permeability layer. 3 / min, 70MPa), to form high conductivity fractures in the oil layer, effectively connecting the injection and production relationship and changing the seepage field. The first set time for the third oil layer 300 can be 3 days, 5 days, 12 days, or 10 days, 12 days, or 8 days.

[0099] According to the relevant parameters of the wavecode communication, the water injection and oil production component 3 corresponding to the oil layer is activated at a timed interval or the wavecode opens the outlet 303 of the second water injection and oil production component 32. Based on the geologically set injection volume, pressure, and injection days, the wavecode controls the injection of large-volume, high-pressure water (3m³) into the low-permeability layer. 3 / min, 70MPa), to form high conductivity fractures in the oil layer, effectively connecting the injection and production relationship and changing the seepage field. The first set time for the second oil layer 200 can be 3 days, 5 days, 12 days, or 10 days, 12 days, or 8 days.

[0100] According to the relevant parameters of the wavecode communication, the water injection and oil production component 3 corresponding to the oil layer is started at a timed interval or the wavecode opens the outlet 303 of the first water injection and oil production component 31. According to the injection volume, pressure and injection days set by the geological conditions, the wavecode controls the injection of large-volume, high-pressure water (3m³) into the low-permeability layer. 3 / min, 70MPa), to form high conductivity fractures in the oil layer, effectively connecting the injection and production relationship and changing the seepage field. The first set time for the first oil layer 100 can be 3 days, 5 days, 12 days, or 10 days, 12 days, or 8 days.

[0101] Entering the well-clogging stage allows for the effective replenishment of formation energy and the displacement of matrix crude oil. The clogging time depends on the needs.

[0102] After the well is sealed, the oil is released to allow the crude oil from the first oil layer 100, the second oil layer 200, and the third oil layer 300 to enter the first water injection oil production assembly 31, the second water injection oil production assembly 32, and the third water injection oil production assembly 33.

[0103] Remove the second production tree 6 and install the first production tree 52 and the oil pump 51.

[0104] Determine the oil production method, whether it is separate or combined production: control the sealing component 313 to unseal the oil inlet 304, and realize oil production.

[0105] In some embodiments of this application, such as Figure 6 As shown, oil extraction methods also include:

[0106] 107: Remove the first production tree 52 and the oil pump 51, and connect the second production tree 6 and the third water injection production assembly 33;

[0107] 108: Sequentially open the outlet 303 of the first water injection oil production assembly 31, the outlet 303 of the second water injection oil production assembly 32, and the outlet 303 of the third water injection oil production assembly 33 to sequentially inject water into the first oil layer 100, the second oil layer 200, and the third oil layer 300.

[0108] 109: After a second set time, close the outlet 303 of the first water injection oil production component 31, the outlet 303 of the second water injection oil production component 32, and the outlet 303 of the third water injection oil production component 33, and open the inlet 304 of the first water injection oil production component 31, the inlet 304 of the second water injection oil production component 32, and the inlet 304 of the third water injection oil production component 33 to release crude oil from the first oil layer 100, the second oil layer 200, and the third oil layer 300.

[0109] 110: Remove the second production tree 6 and lower the oil pump 51 to connect the third water injection production assembly 33 and the first production tree 52;

[0110] 111: Control the operation of the oil pump 51 to extract crude oil from the first oil layer 100, the second oil layer 200 and the third oil layer 300.

[0111] Understandably, this facilitates the further extraction and exploitation of residual crude oil in the oil reservoir, thereby improving the extraction efficiency.

[0112] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0113] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0114] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. An oil production apparatus, characterized by, The oil production equipment includes a support base (1), a packer (2), a water injection oil production assembly (3), and a controller, wherein, The support base (1) is connected to the water injection oil production assembly (3); The number of the water injection oil production components (3) is multiple. The multiple water injection oil production components (3) are arranged sequentially along the height direction and connected to each other. Each water injection oil production component (3) has an oil inlet (304) and a water outlet (303). The oil inlet (304) is used to allow crude oil from the outside to enter, and the water outlet (303) supplies water to leave the water injection oil production component (3) and inject it into the oil layer. The number of the sealing devices (2) is multiple. Two adjacent sealing devices (2) can cooperate with a water injection oil production assembly (3) to form a flow cavity. The oil inlet (304) and water outlet (303) of each water injection oil production assembly (3) are connected to the same flow cavity. The adjacent flow cavities are relatively sealed. The controller is used to control the opening and closing of the oil inlet (304) and the water outlet (303).

2. The oil production apparatus according to claim 1, characterized by The oil production equipment includes a connector (4) that connects the support base (1) and the water injection oil production assembly (3) located at the highest position.

3. The oil production apparatus according to claim 2, characterized by The oil production equipment includes an oil pump (51) and a first tree (52). The oil pump (51) is installed on the support base (1) and is connected to the first tree (52) and the water injection oil production assembly (3) located at the highest position.

4. The oil production apparatus of claim 1, wherein The oil production equipment includes a second tree (6), which is connected to the water injection oil production assembly (3) located at the highest position.

5. The oil extraction equipment according to claim 1, characterized in that, The oil production equipment also includes a sealing part that seals the end of the water injection oil production component (3) located at the lowest position away from the water injection oil production component (3) connected to it.

6. The oil extraction equipment according to claim 5, characterized in that, The sealing part includes an oil pipe (71) and a plug (72). The oil pipe (71) is connected to the water injection oil production assembly (3), and the plug (72) seals the end of the oil pipe (71) away from the water injection oil production assembly (3).

7. The oil extraction equipment according to claim 1, characterized in that, The water injection oil production assembly (3) includes a housing (311), a one-way valve (312), and a plug (313). The housing (311) has a first channel (301), a second channel (302), an oil inlet (304), and a water outlet (303). The first channel (301) penetrates the housing (311) along the height direction. The oil inlet (304) and the water outlet (303) are arranged along the height direction and are respectively connected to the first channel (301). The water outlet (303) is connected to the first channel (301) and the second channel (302). One end of the second channel (302) extends to the lower end of the housing (311). The plug (313) is located in the first channel (301) and can move along the height direction to seal the oil inlet (304) and the water outlet (303), and relatively seal the second channel (302) and the first channel (301).

8. The oil extraction equipment according to claim 1, characterized in that, The oil production equipment includes a casing pressure valve (8), which connects the support base (1) and the water injection oil production assembly (3) located at the highest position.

9. An oil extraction method, characterized in that, The oil extraction method includes: The sealing part, the first water injection oil production assembly (31), the first sealing device (21), the second water injection oil production assembly (32), the second sealing device (22), the third water injection oil production assembly (33) and the third sealing device (23) are sequentially inserted into the pipe pile (9) and assembled in the order of insertion. The expansion of the first sealing device (21), the second sealing device (22) and the third sealing device (23) is controlled to cooperate with the pipe pile (9) to form a first cavity, a second cavity and a third cavity, wherein the outlet (303) and the inlet (304) of the first water injection oil production assembly (31) are both located in the first cavity, the outlet (303) and the inlet (304) of the second water injection oil production assembly (32) are both located in the second cavity, and the outlet (303) and the inlet (304) of the third water injection oil production assembly (33) are both located in the third cavity. The first cavity is connected to the first oil layer (100), the second cavity is connected to the second oil layer (200), and the third cavity is connected to the third oil layer (300). Connect the second wellhead (6) and the third water injection oil production assembly (33), and sequentially open the outlet (303) of the first water injection oil production assembly (31), the outlet (303) of the second water injection oil production assembly (32) and the outlet (303) of the third water injection oil production assembly (33) to inject water into the first oil layer (100), the second oil layer (200) and the third oil layer (300) in sequence; After a first set time, the outlets (303) of the first water injection oil production component (31), the second water injection oil production component (32), and the third water injection oil production component (33) are closed, and the inlets (304) of the first water injection oil production component (31), the second water injection oil production component (32), and the third water injection oil production component (33) are opened to release crude oil from the first oil layer (100), the second oil layer (200), and the third oil layer (300). Remove the second tree (6) and lower the oil pump (51) to connect the third water injection oil production assembly (33) and the first tree (52); The oil pump (51) is controlled to operate to extract crude oil from the first oil layer (100), the second oil layer (200) and the third oil layer (300).

10. The oil extraction method according to claim 9, characterized in that, Also includes: Remove the first tree (52) and the oil pump (51), and connect the second tree (6) and the third water injection oil production assembly (33); The outlets (303) of the first water injection oil production assembly (31), the second water injection oil production assembly (32), and the third water injection oil production assembly (33) are opened in sequence to inject water into the first oil layer (100), the second oil layer (200), and the third oil layer (300) in sequence. After a second set time, the outlets (303) of the first water injection oil production component (31), the second water injection oil production component (32), and the third water injection oil production component (33) are closed, and the inlets (304) of the first water injection oil production component (31), the second water injection oil production component (32), and the third water injection oil production component (33) are opened to release crude oil from the first oil layer (100), the second oil layer (200), and the third oil layer (300). Remove the second tree (6) and lower the oil pump (51) to connect the third water injection oil production assembly (33) and the first tree (52); The oil pump (51) is controlled to operate to extract crude oil from the first oil layer (100), the second oil layer (200) and the third oil layer (300).

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