Layered synchronous injection-production method and storage medium

Abstract

The invention relates to a layered synchronous injection and production method and a storage medium. The method comprises the steps that a layered synchronous injection and production process pipe column is prepared; the layered synchronous injection-production process pipe column is tripped into a producing well; a medium is injected into the layered synchronous injection-production process pipe column; a ball is thrown into the layered synchronous injection-production process pipe column; and layered synchronous injection-production operation is carried out. According to the layered synchronous injection and production method and the storage medium, the injection modes can be freely combined according to the actual requirements of an oil well, and layered synchronous injection of different media is achieved; meanwhile, after gas-assisted steam huff and puff, layered synchronous production can be carried out without moving a tubular column, interlayer interference is inhibited, heat loss is reduced, the huff and puff effect and the production time rate are improved, and the functions of well washing, thin oil mixing and the like can be achieved.

Description

Technical Field

[0001] The present application relates to the field of oil production engineering, and in particular to a layered synchronous injection and production method and a storage medium. Background Art

[0002] As heavy oil development enters the middle and late stages, the contradictions of insufficient formation energy, low pressure and low production are prominent, which seriously affects the development effect of heavy oil. Gas-assisted steam huff and puff technologies such as carbon dioxide and nitrogen-assisted drainage are effective process measures to supplement formation energy and improve the development effect of heavy oil. Conventional gas-assisted steam huff and puff technologies mainly use a general injection method. Due to the large difference in physical properties between layers of some oil wells, media such as carbon dioxide and nitrogen cannot effectively enter the target layer, and the measures are poorly targeted; and layered injection requires two trips of tubing, and the segmented injection method cannot be injected synchronously, the scope of action is limited, and the construction period is long, the operation process is complicated, and the production time rate is low. At the same time, after gas-assisted steam huff and puff, the thermal recovery string needs to be pulled out and the production string is lowered, which results in large heat loss and affects the production effect. Summary of the invention

[0003] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a layered synchronous injection and production method and a storage medium.

[0004] In a first aspect, the present application provides a layered synchronous injection-production method, the method comprising the steps of:

[0005] Prepare the process string for layered synchronous injection and production;

[0006] Lowering the layered synchronous injection and production process string into the oil production well;

[0007] Injecting medium into the layered synchronous injection and production process string;

[0008] Throwing a ball into the layered synchronous injection and production process string;

[0009] Carry out layered synchronous injection and production operations.

[0010] Preferably, the stratified synchronous injection and production process string includes: a first packer, a stratified sleeve switch, a second packer, a lateral multifunctional check valve, a telescopic pipe and a pump, wherein the stratified sleeve switch is respectively connected to the first packer and the second packer, the lateral multifunctional check valve is respectively connected to the second packer and the telescopic pipe, and the telescopic pipe is connected to the pump.

[0011] Preferably, the layered synchronous injection and production process string further comprises: an injection and production oil pipe, wherein the injection and production oil pipe is connected to the oil pump.

[0012] Preferably, the layered sliding sleeve switch comprises: an upper joint, a pin, a sliding sleeve and a lower joint, wherein two ends of the sliding sleeve are respectively connected to the upper joint and the lower joint, and the pin is arranged on the sliding sleeve.

[0013] Preferably, the lateral multifunctional check valve comprises: a valve body, a valve bonnet, a steel ball and a spring, wherein the valve bonnet is arranged on the valve body, the steel ball and the spring are arranged in the valve bonnet, and two ends of the spring are respectively pressed against the valve bonnet and the steel ball.

[0014] Preferably, the injecting medium into the layered synchronous injection and production process string comprises the steps of:

[0015] Inputting a first medium into the injection and production oil pipe of the stratified synchronous injection and production process string;

[0016] A second medium is injected into the space between the layered synchronous injection and production process string and the oil production well.

[0017] Preferably, the first medium is steam;

[0018] Preferably, the second medium is nitrogen.

[0019] According to a third aspect, an electronic device is provided, the electronic device comprising:

[0020] at least one processor; and,

[0021] a memory communicatively connected to the at least one processor; wherein,

[0022] The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can perform any of the aforementioned stratified synchronous injection and production methods.

[0023] In a fourth aspect, a non-transitory computer-readable storage medium is provided, wherein the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions are used to enable the computer to execute any of the aforementioned stratified synchronous injection and production methods.

[0024] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0025] A layered synchronous injection and production method and storage medium provided in the embodiment of the present application can freely combine injection methods according to the actual needs of the oil well to achieve layered synchronous injection of different media; at the same time, after gas-assisted steam throughput, layered synchronous production can be carried out without moving the tubing string, thereby suppressing inter-layer interference, reducing heat loss, improving throughput effect and production time rate, and having the functions of well washing, thinning oil blending, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0028] Figure 1 It is a structural schematic diagram of a layered synchronous injection and production process string in a layered synchronous injection and production method provided by an embodiment of the present invention;

[0029] Figure 2 It is a state diagram of a layered synchronous injection-production method provided by an embodiment of the present invention;

[0030] Figure 3 It is a structural schematic diagram of a layered sliding sleeve switch in a layered synchronous injection and production method provided by an embodiment of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a lateral multifunctional check valve in a layered synchronous injection and production method provided by an embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of a first packer in a layered synchronous injection-production method provided by an embodiment of the present invention;

[0033] Figure 6 It is a structural schematic diagram of an electronic device provided by the present invention;

[0034] Figure 7 It is a structural schematic diagram of a non-transitory computer-readable storage medium provided by the present invention. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] Figure 1 A schematic flow chart of a layered synchronous injection-production method provided in an embodiment of the present application.

[0037] The present application provides a layered synchronous injection-production method, the method comprising the steps of:

[0038] S1: Preparation of stratified synchronous injection and production process string;

[0039] In an embodiment of the present application, the layered synchronous injection and production process string includes: a first packer 1, a layered sleeve switch 2, a second packer 3, a lateral multifunctional check valve 4, a telescopic pipe 5 and a pump 6, wherein the layered sleeve switch 2 is respectively connected to the first packer 1 and the second packer 3, the lateral multifunctional check valve 4 is respectively connected to the second packer 3 and the telescopic pipe 5, and the telescopic pipe 5 is connected to the pump 6.

[0040] Specifically, the first packer 1, the layered sliding sleeve switch 2, the second packer 3, the lateral multifunctional check valve 4, the telescopic pipe 5 and the oil pump 6 are arranged in sequence from bottom to top to form a layered synchronous injection and production process string, and the layered injection of different media into the layered synchronous injection and production process string is combined with layered oil production. The layered synchronous injection and production process string completes synchronous layered injection and layered oil production.

[0041] In the embodiment of the present application, the layered synchronous injection and production process string further includes: an injection and production oil pipe 7 , wherein the injection and production oil pipe 7 is connected to the oil pump 6 .

[0042] Specifically, the oil injection and production pipe 7 is used to output the oil extracted by the oil pump 6 to the outside.

[0043] In the embodiment of the present application, the layered sliding sleeve switch 2 includes: an upper joint 21, a pin 22, a sliding sleeve 23 and a lower joint 24, wherein the two ends of the sliding sleeve 23 are respectively connected to the upper joint 21 and the lower joint 24, and the pin 22 is arranged on the sliding sleeve 23.

[0044] like Figure 3 Specifically, the layered sleeve switch 2 is connected between the first packer 1 and the second packer 3. After the ball is thrown, it sits on the sleeve seat and cuts off the pin 22 by the injection pressure. The sleeve 23 moves down to the limit step position. At this time, the lateral port is exposed to form a lateral channel.

[0045] In the embodiment of the present application, the lateral multifunctional check valve 4 includes: a valve body 41, a valve bonnet 42, a steel ball 43 and a spring 44, wherein the valve bonnet 42 is arranged on the valve body 41, the steel ball 43 and the spring 44 are arranged in the valve bonnet 42, and the two ends of the spring 44 are respectively pressed against the valve bonnet 42 and the steel ball 43.

[0046] like Figure 5The first packer 1 and the second packer 3 (Y361 packer) are thermally set. When the temperature reaches 200°C, the expansion agent expands due to heat, pushing the piston to drive the cone to compress the rubber sleeve, sealing the ring space and achieving sealing. The locking mechanism is designed to ensure the sealing requirements of the packer in the production process after steam injection.

[0047] S2: lowering the layered synchronous injection and production process string into the oil production well;

[0048] Specifically, the layered synchronous injection and production process string is lowered into the designed position.

[0049] S3: injecting medium into the layered synchronous injection and production process string;

[0050] In an embodiment of the present application, injecting a medium into the layered synchronous injection and production process string comprises the following steps:

[0051] Inputting a first medium into the injection and production oil pipe 7 of the stratified synchronous injection and production process string;

[0052] A second medium is injected into the space between the layered synchronous injection and production process string and the oil production well.

[0053] In the embodiment of the present application, the first medium is steam;

[0054] In the embodiment of the present application, the second medium is nitrogen.

[0055] S4: throwing a ball into the layered synchronous injection and production process string;

[0056] S5: Perform layered synchronous injection and production operations.

[0057] The stratified synchronous injection and production process string is lowered into the designed position, and steam injection begins. As the steam injection temperature rises, the Y361 packer is sealed (at this time, the oil casing is separated, and the upper and lower oil layers are separated by the packer to form two units. The Y361 packer has a locking device and is always in a sealed state, meeting the technical requirements of stratified steam injection and stratified oil production). Steam is injected through the injection and production pipe 7, and then nitrogen is injected from the casing. The nitrogen enters the injection and production pipe 7 through the lateral multifunctional check valve 4 and mixes with the steam, and is synchronously injected into the lower oil layer first. When the steam and nitrogen volumes reach the design requirements, the ball is dropped at the wellhead, and the ball falls on the ball seat of the stratified sliding sleeve switch 2. Depending on the injection pressure, the pin 22 is sheared, and the sliding sleeve 23 moves downward. The ball sits on the ball seat to block the radial channel, and the side outlet exposes the mixed gas from the outlet to enter the upper oil layer. Steam and nitrogen are synchronously injected into the upper oil layer to reach the designed injection volume, realizing stratified synchronous injection. After the steam injection is completed, the upper and lower oil layers are simultaneously well-stifled and blown out.

[0058] When the pump is lowered, the stationary pipe string is lowered into the oil pump 6 for direct production. The liquid in the upper oil layer enters the injection and production pipe 7 through the lateral opening of the sliding sleeve 23 switch. The liquid in the lower oil layer, due to the oil layer pressure, lifts the low-density ball on the ball seat of the layered sliding sleeve switch 2 and enters the injection and production pipe 7. It is mixed with the liquid in the upper oil layer and is lifted to the ground with the oil pump. The upper and lower layers are supplied with liquid at the same time, realizing synchronous production of the two layers and alleviating interference between the layers.

[0059] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the appended claims of the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the appended claims, or the equivalent forms of such scope and boundaries.

[0060] Reference below Figure 6 , which shows a schematic diagram of the structure of an electronic device 100 suitable for implementing the embodiment of the present disclosure. The electronic device in the embodiment of the present disclosure may include, but is not limited to, mobile terminals such as mobile phones, notebook computers, digital broadcast receivers, PDAs (personal digital assistants), PADs (tablet computers), PMPs (portable multimedia players), vehicle terminals (such as vehicle navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 6 The electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present disclosure.

[0061] like Figure 6 As shown, the electronic device 100 may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 101, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 102 or a program loaded from a storage device 108 to a random access memory (RAM) 103. In the RAM 103, various programs and data required for the operation of the electronic device 100 are also stored. The processing device 101, the ROM 102, and the RAM 103 are connected to each other via a bus 104. An input / output (I / O) interface 105 is also connected to the bus 104.

[0062] Typically, the following devices may be connected to the I / O interface 105: an input device 106 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 107 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 108 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 109. The communication device 109 may allow the electronic device 100 to communicate with other devices wirelessly or by wire to exchange data. Although the electronic device 100 having various devices is shown in the figure, it should be understood that it is not required to implement or have all the devices shown. More or fewer devices may be implemented or have alternatively.

[0063] In particular, according to an embodiment of the present disclosure, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present disclosure includes a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication device 109, or installed from the storage device 108, or installed from the ROM 102. When the computer program is executed by the processing device 101, the above-mentioned functions defined in the method of the embodiment of the present disclosure are executed.

[0064] Reference below Figure 7 , which shows a structural schematic diagram of a computer-readable storage medium suitable for implementing an embodiment of the present disclosure, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, it can implement any of the above-mentioned layered synchronous injection and production methods.

[0065] A layered synchronous injection and production method and storage medium provided in the embodiment of the present application can freely combine injection methods according to the actual needs of the oil well to achieve layered synchronous injection of different media; at the same time, after gas-assisted steam throughput, layered synchronous production can be carried out without moving the tubing string, thereby suppressing inter-layer interference, reducing heat loss, improving throughput effect and production time rate, and having the functions of well washing, thinning oil blending, etc.

[0066] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0067] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A layered synchronous injection and production method, It is characterized in that The method comprises the steps of: Prepare the process string for layered synchronous injection and production; Lowering the layered synchronous injection and production process string into the oil production well; Injecting medium into the layered synchronous injection and production process string; Throwing a ball into the layered synchronous injection and production process string; Carry out layered synchronous injection and production operations.

2. The stratified synchronous injection and production method according to claim 1, It is characterized in that The stratified synchronous injection and production process string includes: a first packer, a stratified sleeve switch, a second packer, a lateral multifunctional check valve, a telescopic pipe and a pump, wherein the stratified sleeve switch is respectively connected to the first packer and the second packer, the lateral multifunctional check valve is respectively connected to the second packer and the telescopic pipe, and the telescopic pipe is connected to the pump.

3. The stratified synchronous injection and production method according to claim 2, It is characterized in that The layered synchronous injection and production process string also includes: an injection and production oil pipe, wherein the injection and production oil pipe is connected to the oil pump.

4. The stratified synchronous injection and production method according to claim 2, It is characterized in that The layered sliding sleeve switch comprises: an upper joint, a pin, a sliding sleeve and a lower joint, wherein two ends of the sliding sleeve are respectively connected to the upper joint and the lower joint, and the pin is arranged on the sliding sleeve.

5. The stratified synchronous injection and production method according to claim 2, It is characterized in that The lateral multifunctional check valve comprises: a valve body, a valve bonnet, a steel ball and a spring, wherein the valve bonnet is arranged on the valve body, the steel ball and the spring are arranged in the valve bonnet, and two ends of the spring are respectively pressed against the valve bonnet and the steel ball.

6. The stratified synchronous injection and production method according to claim 1, It is characterized in that The step of injecting a medium into the layered synchronous injection and production process string comprises the following steps: Inputting a first medium into the injection and production oil pipe of the stratified synchronous injection and production process string; A second medium is injected into the space between the layered synchronous injection and production process string and the oil production well.

7. The stratified synchronous injection and production method according to claim 6, It is characterized in that The first medium is steam.

8. The stratified synchronous injection and production method according to claim 6, It is characterized in that The second medium is nitrogen.

9. An electronic device, It is characterized in that The electronic device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the stratified synchronous injection and production method according to any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable the computer to execute the stratified synchronous injection and production method according to any one of claims 1 to 7.

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