Shaft integrity evaluation method and device, medium and electronic equipment

Abstract

The invention discloses a shaft integrity evaluation method and device, a medium and electronic equipment. The method comprises the steps that by analyzing wellbores, risk point sources influencing the integrity of the wellbores are determined, and the wellbores comprise a steam injection well wellbore and a production well wellbore; according to the risk point sources, the steam injection well shaft and the production well shaft are analyzed, evaluation indexes of well barriers corresponding to the steam injection well shaft and the production well shaft are determined, and the evaluation indexes are used for conducting shaft integrity evaluation on the steam injection well shaft and the production well shaft. The accuracy of evaluating the integrity of the shaft can be improved.

Description

Background Art

[0002] With the continuous deepening of heavy oil thermal recovery, safety hazards such as surface gas leakage, casing short-circuit corrosion leakage, pipe corrosion, casing damage, and wellhead damage have gradually emerged, seriously affecting the safe and controllable production of heavy oil. It is necessary to carry out relevant research work on wellbore integrity evaluation and carry out relevant evaluation and analysis to ensure the safe and controllable development of heavy oil. Therefore, how to improve the accuracy of evaluating wellbore integrity is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present application is to provide a wellbore integrity evaluation method, device, medium and electronic equipment. The present application can improve the accuracy of evaluating wellbore integrity.

[0004] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0005] According to one aspect of an embodiment of the present application, a wellbore integrity evaluation method is provided, characterized in that the method includes: determining risk point sources that affect the integrity of the wellbore by analyzing the wellbore, the wellbore including a steam injection wellbore and a production wellbore; analyzing the steam injection wellbore and the production wellbore according to the risk point sources, and determining evaluation indicators of well barriers corresponding to the steam injection wellbore and the production wellbore, and the evaluation indicators are used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore.

[0006] In one embodiment of the present application, based on the aforementioned scheme, the well barrier of the steam injection wellbore includes a packer, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: determining the evaluation index of the packer as pressure resistance and temperature resistance; evaluating the pressure resistance and temperature resistance of the packer by analyzing the air component of the casing pressure ring, the casing pressure difference and the corrosive gas concentration corresponding to the packer.

[0007] In one embodiment of the present application, based on the aforementioned scheme, the well barrier of the steam injection wellbore includes an insulation pipe, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: determining the evaluation index of the insulation pipe as insulation performance; controlling the insulation level of the insulation pipe to be greater than a preset level by analyzing the insulation performance of the insulation pipe, and the insulation level is used to evaluate the insulation performance of the insulation pipe.

[0008] In one embodiment of the present application, based on the aforementioned scheme, the well barrier of the steam injection wellbore includes a steam injection wellhead device, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: determining that the evaluation index of the steam injection wellhead device is pressure resistance, temperature resistance and airtightness; and evaluating the pressure resistance, temperature resistance and airtightness of the steam injection wellhead device by monitoring the wellhead pressure and airtightness corresponding to the steam injection wellhead device.

[0009] In one embodiment of the present application, based on the aforementioned scheme, the well barrier of the production well bore comprises a cement ring, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection well bore and the production well bore, including: determining that the evaluation index of the cement ring is pressure resistance; and evaluating the pressure resistance of the cement ring by performing cementing quality logging on the cement ring.

[0010] In one embodiment of the present application, based on the aforementioned scheme, the well barrier of the production wellbore includes casing, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: determining that the evaluation index of the casing is airtightness; analyzing the degree of wall thickness loss of the casing by performing wellbore pressure testing and wall thickness detection on the casing, and the degree of wall thickness loss is used to evaluate the airtightness of the casing.

[0011] In one embodiment of the present application, based on the aforementioned scheme, the well barrier of the production wellbore includes a casing head, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: determining that the evaluation index of the casing head is pressure resistance, temperature resistance and corrosion resistance; analyzing the degree of wall thickness loss of the casing by performing wall thickness detection on the casing head, and the wall thickness loss degree is used to evaluate the pressure resistance, temperature resistance and corrosion resistance of the casing head.

[0012] According to one aspect of an embodiment of the present application, a wellbore integrity evaluation device is provided, characterized in that the device includes: a determination unit, used to determine the risk point source affecting the integrity of the wellbore by analyzing the wellbore, the wellbore including a steam injection wellbore and a production wellbore; an evaluation unit, used to analyze the steam injection wellbore and the production wellbore according to the risk point source, and determine the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore, and the evaluation index is used to perform wellbore integrity evaluation on the steam injection wellbore and the production wellbore.

[0013] According to one aspect of an embodiment of the present application, a computer-readable storage medium is provided, on which a computer program is stored. The computer program includes executable instructions. When the executable instructions are executed by a processor, the method described in the above embodiment is implemented.

[0014] According to one aspect of an embodiment of the present application, an electronic device is provided, comprising: one or more processors; and a memory for storing executable instructions of the processors, wherein when the executable instructions are executed by the one or more processors, the one or more processors implement the methods described in the above embodiments.

[0015] In the technical solution of the embodiment of the present application, the integrity of the wellbore is evaluated. The integrity of the wellbore is evaluated by analyzing the risk point sources on the wellbore. Based on the risk point sources and the evaluation of the overall integrity of the wellbore, the integrity of the steam injection wellbore and the production wellbore are evaluated respectively.

[0016] Among them, through analysis, it can be known that the well barriers that affect the integrity of the steam injection wellbore include a first well barrier and a second well barrier. The first well barrier corresponding to the steam injection wellbore includes a packer, an insulation pipe and a steam injection wellhead device. The second well barrier corresponding to the steam injection wellbore includes a cement ring, a casing and a casing head. By determining the evaluation index corresponding to the steam injection wellbore for the first well barrier and the second well barrier corresponding to the steam injection wellbore one by one, and analyzing and controlling the first well barrier and the second well barrier corresponding to the steam injection wellbore, the integrity evaluation of the steam injection wellbore is realized.

[0017] Similarly, through analysis, it can be known that the well barrier that affects the integrity of the production well bore includes the first well barrier. The first well barrier corresponding to the production well bore includes a cement ring, a casing, a casing head and a production wellhead device. By determining the evaluation index corresponding to the production well bore for the first well barrier corresponding to the production well bore one by one, and analyzing and controlling the first well barrier corresponding to the production well bore, the integrity evaluation of the production well bore is achieved.

[0018] Based on the wellbore integrity evaluation method described in the present application, the accuracy of evaluating wellbore integrity is improved, and the safety risks in the heavy oil development process can be effectively reduced, thereby ensuring the safe and stable development of heavy oil.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0021] Figure 1 It is a flow chart of a wellbore integrity evaluation method according to an embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of the structure of a steam injection wellbore according to an embodiment of the present application;

[0023] Figure 3 A schematic diagram of a partial structure of a production wellbore according to an embodiment of the present application;

[0024] Figure 4 is a block diagram of a wellbore integrity evaluation device according to an embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of the system structure of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0027] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present application. However, those skilled in the art will appreciate that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the application.

[0028] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0029] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0030] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0031] The implementation details of the technical solution of the embodiment of the present application are described in detail below:

[0032] According to one aspect of the present application, a wellbore integrity evaluation method is provided. Figure 1 The flowchart of the wellbore integrity evaluation method according to the embodiment of the present application is shown. The wellbore integrity evaluation method can be executed by a device with a computing and processing function. The wellbore integrity evaluation method at least includes steps 110 to 120, which are described in detail as follows:

[0033] In step 110, the wellbore is analyzed to determine the risk point source affecting the integrity of the wellbore, wherein the wellbore includes a steam injection wellbore and a production wellbore.

[0034] In this application, in order to make a comprehensive evaluation of the integrity of the wellbore, it is first necessary to obtain the risk point sources of the wellbore as a whole. By analyzing the risk point sources, the cause of the failure or hazard in the wellbore can be understood. Among them, through the safety hazards of surface gas leakage, casing short-circuit leakage, pipe column corrosion, casing damage and wellhead damage in the wellbore, and combined with the structure of the wellbore, it can be known that the risk point sources may include wellhead devices, casing short-circuit, shallow casing and cement ring. The wellhead device includes a steam injection wellhead device and a production wellhead device.

[0035] Therefore, before evaluating the integrity of the steam injection wellbore and the production wellbore as a whole, the integrity of the wellbore can be evaluated for the casing short-circuit, the shallow casing and the cement sheath.

[0036] Specifically, for example, for the shallow casing, the residual strength of the shallow casing can be calculated by obtaining the corresponding service life and cumulative steam injection volume of the shallow casing and combining electromagnetic flaw detection and multi-arm wellbore testing. Based on the residual strength of the casing, the wall thickness loss of the shallow casing can be judged, thereby achieving integrity evaluation of the wellbore.

[0037] For example, for the cement sheath, the length ratio of the high-quality segment and the good segment corresponding to the cement sheath and the effective thickness of the cap layer can be determined through cementing quality testing. Based on the length ratio and the effective thickness of the cap layer, the integrity evaluation of the wellbore can be achieved.

[0038] For example, for the casing short-circuit, the service life of the casing short-circuit can be obtained through wall thickness detection. Then, the casing short-circuit is evaluated by calculating the yield strength of the casing short-circuit at different temperatures and the degree of wall thickness loss, thereby achieving the integrity evaluation of the wellbore.

[0039] Continue to refer to Figure 1 In step 120, according to the risk point source, the steam injection wellbore and the production wellbore are analyzed, and evaluation indicators of the well barriers corresponding to the steam injection wellbore and the production wellbore are determined, and the evaluation indicators are used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore.

[0040] In the present application, the evaluation of wellbore integrity may include the evaluation of the wellbore integrity of the steam injection well and the evaluation of the wellbore integrity of the production well, wherein the evaluation of the wellbore integrity of the steam injection well and the evaluation of the wellbore integrity of the production well may be achieved through a well barrier on the wellbore.

[0041] Reference Figure 2 , is a schematic diagram of a partial structure of a steam injection wellbore according to an embodiment of the present application. With respect to the steam injection wellbore, the well barrier of the steam injection wellbore may include a first well barrier and a second well barrier. The first well barrier corresponding to the steam injection wellbore includes a packer, an insulation pipe and a steam injection wellhead device. The second well barrier corresponding to the steam injection wellbore includes a cement ring, a casing and a casing head.

[0042] In one embodiment of the present application, the well barrier of the steam injection well bore includes a packer, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, and the specific steps include steps 121 to 122:

[0043] Step 121, determining the evaluation indexes of the packer as pressure resistance and temperature resistance.

[0044] Step 122, evaluating the pressure resistance and temperature resistance of the packer by analyzing the air components of the casing pressure ring, the casing pressure difference and the corrosive gas concentration corresponding to the packer.

[0045] In this embodiment, since the steam injection process of the steam injection well will cause annular corrosion and pressure problems to the packer, it is necessary to determine the evaluation index of the packer. By analyzing the air components of the oil-casing pressure ring, the oil-casing pressure difference and the concentration of corrosive gases corresponding to the packer, the pressure resistance and temperature resistance of the packer are evaluated, thereby realizing the integrity evaluation of the wellbore of the steam injection well.

[0046] In one embodiment of the present application, the well barrier of the steam injection well bore includes a heat-insulating pipe, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, and the specific steps include steps 123 to 124:

[0047] Step 123, determining that the evaluation index of the thermal insulation pipe is thermal insulation performance.

[0048] Step 124, by analyzing the thermal insulation performance of the thermal insulation pipe, controlling the thermal insulation level of the thermal insulation pipe to be greater than a preset level, and the thermal insulation level is used to evaluate the thermal insulation performance of the thermal insulation pipe.

[0049] In this embodiment, since the steam injection process in the steam injection well may cause annular corrosion, high temperature and pressure problems to the thermally insulated pipe, it is necessary to determine the evaluation index of the thermally insulated pipe. By analyzing the thermal insulation performance of the thermally insulated pipe, the thermal insulation level of the thermally insulated pipe is controlled to be greater than the preset level. The thermal insulation level is used to evaluate the thermal insulation performance of the thermally insulated pipe, thereby evaluating the thermal insulation performance of the thermally insulated pipe, and then realizing the integrity evaluation of the wellbore of the steam injection well.

[0050] In one embodiment of the present application, the well barrier of the steam injection wellbore includes a steam injection wellhead device, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore. The specific steps include steps 125 to 126:

[0051] Step 125, determining the evaluation indexes of the steam injection wellhead device as pressure resistance, temperature resistance and airtightness.

[0052] Step 126, evaluating the pressure resistance, temperature resistance and airtightness of the steam injection wellhead device by monitoring the wellhead pressure and airtightness corresponding to the steam injection wellhead device.

[0053] In this embodiment, since the steam injection process of the steam injection well will bring high temperature and high pressure problems to the steam injection wellhead device. Therefore, it is necessary to determine the evaluation index of the steam injection wellhead device and monitor the wellhead pressure and airtightness corresponding to the steam injection wellhead device. In addition, during the monitoring process, the corresponding operation mode of the steam injection wellhead device can also be monitored. Based on this, the pressure resistance, temperature resistance and airtightness of the steam injection wellhead device can be evaluated, thereby realizing the integrity evaluation of the steam injection wellbore.

[0054] Reference Figure 3 , is a schematic diagram of a partial structure of a production wellbore according to an embodiment of the present application. With respect to the production wellbore, the well barrier of the production wellbore includes a first well barrier. The first well barrier corresponding to the production wellbore includes a cement ring, a casing, a casing head and a production wellhead device.

[0055] In one embodiment of the present application, the well barrier of the production well bore includes a cement ring, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, and the specific steps include steps 131 to 132:

[0056] Step 131, determining that the evaluation index of the cement sheath is pressure resistance.

[0057] Step 132, evaluating the pressure resistance of the cement sheath by performing cementing quality logging on the cement sheath.

[0058] In this embodiment, the cement sheath may suffer from external casing corrosion and stress damage during production. Therefore, it is necessary to determine the evaluation index of the cement sheath. By performing cementing quality logging on the cement sheath, the cement sheath can also be tested during pipe inspection operations to determine the pressure resistance of the cement sheath, so as to evaluate the pressure resistance of the cement sheath.

[0059] In one embodiment of the present application, the well barrier of the production well bore includes a casing, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, and the specific steps include steps 133 to 134:

[0060] Step 133, determining that the evaluation index is airtightness.

[0061] Step 134, analyzing the wall thickness loss degree of the casing by performing a wellbore pressure test and a wall thickness test on the casing, wherein the wall thickness loss degree is used to evaluate the airtightness of the casing.

[0062] In this embodiment, the casing may be damaged and leak during the production process. Therefore, it is necessary to determine the evaluation index of the casing. The casing is subjected to wellbore pressure test and wall thickness test to analyze the wall thickness loss degree of the casing, and the wall thickness loss degree is used to evaluate the airtightness of the casing. In addition, the steel grade and the depth of the casing can be judged to further evaluate the completion of the casing.

[0063] In one embodiment of the present application, the well barrier of the production well bore comprises a casing head, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, and the specific steps include steps 135 to 136:

[0064] Step 135, determining the evaluation indexes of the casing head to be pressure resistance, temperature resistance and corrosion resistance.

[0065] Step 136, analyzing the wall thickness loss degree of the casing by performing a wall thickness test on the casing head, wherein the wall thickness loss degree is used to evaluate the pressure resistance, temperature resistance and corrosion resistance of the casing head.

[0066] In this embodiment, since the production process of the production well will bring high temperature and high pressure problems to the casing head, it is necessary to determine the evaluation index of the casing head. By testing the wall thickness of the casing head, the wall thickness loss degree of the casing is analyzed, and the wall thickness loss degree is used to evaluate the pressure resistance, temperature resistance and corrosion resistance of the casing head.

[0067] The following describes an apparatus embodiment of the present application, which can be used to perform the wellbore integrity evaluation method in the above-mentioned embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, please refer to the above-mentioned embodiment of the wellbore integrity evaluation method of the present application.

[0068] Figure 4 It is a block diagram of a wellbore integrity evaluation device according to an embodiment of the present application.

[0069] Reference Figure 4 As shown, according to a wellbore integrity evaluation device 400 of an embodiment of the present application, the device 400 includes: a determination unit 401, used to determine the risk point source that affects the integrity of the wellbore by analyzing the wellbore, and the wellbore includes a steam injection wellbore and a production wellbore; an evaluation unit 402, used to analyze the steam injection wellbore and the production wellbore according to the risk point source, and determine the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore.

[0070] As another aspect, the present application further provides a computer-readable storage medium on which a program product capable of implementing the above method of the present specification is stored. In some possible implementations, various aspects of the present application may also be implemented in the form of a program product, which includes a program code, and when the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps according to various exemplary implementations of the present application described in the above "Exemplary Method" section of the present specification.

[0071] Computer readable signal media may include data signals propagated in baseband or as part of a carrier wave, in which readable program code is carried. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Readable signal media may also be any readable medium other than a readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0072] The program code embodied on the readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wired, optical cable, RF, etc., or any suitable combination of the foregoing.

[0073] Program code for performing the operations of the present application may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java, C++, etc., and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user computing device, partially on the user device, as a separate software package, partially on the user computing device and partially on a remote computing device, or entirely on a remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0074] As another aspect, the present application also provides an electronic device capable of implementing the above method.

[0075] Those skilled in the art will appreciate that various aspects of the present application may be implemented as a system, method or program product. Therefore, various aspects of the present application may be specifically implemented in the following forms, namely: a complete hardware implementation, a complete software implementation (including firmware, microcode, etc.), or a combination of hardware and software, which may be collectively referred to as "circuit", "module" or "system" herein.

[0076] Figure 5 The schematic diagram of the system structure of the electronic device according to the embodiment of the present application is shown below. Figure 5 The electronic device 500 according to this embodiment of the present application is described. Figure 5 The electronic device 500 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0077] like Figure 5 As shown, the electronic device 500 is in the form of a general computing device. The components of the electronic device 300 may include but are not limited to: at least one processing unit 510, at least one storage unit 520, and a bus 530 connecting different system components (including the storage unit 520 and the processing unit 510).

[0078] The storage unit stores program codes, which can be executed by the processing unit 510, so that the processing unit 510 executes the steps described in the above “Example Method” section of this specification according to various exemplary implementations of the present application.

[0079] The storage unit 520 may include a readable medium in the form of a volatile storage unit, such as a random access memory unit (RAM) 521 and / or a cache memory unit 522 , and may further include a read-only memory unit (ROM) 523 .

[0080] The storage unit 520 may also include a program / utility 524 having a set (at least one) of program modules 525, such program modules 525 including but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment.

[0081] Bus 530 may represent one or more of several types of bus structures, including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, or a local bus using any of a variety of bus architectures.

[0082] The electronic device 500 may also communicate with one or more external devices 1200 (e.g., keyboards, pointing devices, Bluetooth devices, etc.), may also communicate with one or more devices that enable a user to interact with the electronic device 500, and / or communicate with any device that enables the electronic device 500 to communicate with one or more other computing devices (e.g., routers, modems, etc.). Such communication may be performed via an input / output (I / O) interface 550. In addition, the electronic device 500 may also communicate with one or more networks (e.g., local area networks (LANs), wide area networks (WANs), and / or public networks, such as the Internet) via a network adapter 560. As shown, the network adapter 560 communicates with other modules of the electronic device 500 via a bus 530. It should be understood that, although not shown in the figure, other hardware and / or software modules may be used in conjunction with the electronic device 500, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0083] Through the description of the above implementation methods, it is easy for those skilled in the art to understand that the example implementation methods described here can be implemented by software or by combining software with necessary hardware. Therefore, the technical solution according to the implementation methods of the present application can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the implementation methods of the present application.

[0084] In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, and are not intended to be limiting. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be performed synchronously or asynchronously, for example, in multiple modules.

[0085] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be performed without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A method for evaluating wellbore integrity, characterized in that: The method comprises: By analyzing the wellbore, determining the risk point source affecting the integrity of the wellbore, the wellbore includes a steam injection wellbore and a production wellbore; According to the risk point source, the steam injection wellbore and the production wellbore are analyzed, and evaluation indicators of the well barriers corresponding to the steam injection wellbore and the production wellbore are determined. The evaluation indicators are used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore.

2. The method according to claim 1, characterized in that The well barrier of the steam injection wellbore includes a packer, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: Determining the evaluation indexes of the packer to be pressure resistance and temperature resistance; The pressure resistance and temperature resistance of the packer are evaluated by analyzing the air components of the casing pressure ring, the casing pressure difference and the corrosive gas concentration corresponding to the packer.

3. The method according to claim 1, characterized in that The well barrier of the steam injection well bore comprises a heat-insulating pipe, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, including: Determining the evaluation index of the thermal insulation pipe as thermal insulation performance; By analyzing the thermal insulation performance of the thermal insulation pipe, the thermal insulation grade of the thermal insulation pipe is controlled to be greater than a preset grade, and the thermal insulation grade is used to evaluate the thermal insulation performance of the thermal insulation pipe.

4. The method according to claim 1, characterized in that: The well barrier of the steam injection wellbore includes a steam injection wellhead device, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: Determining the evaluation indexes of the steam injection wellhead device as pressure resistance, temperature resistance and airtightness; By monitoring the wellhead pressure and the sealing degree corresponding to the steam injection wellhead device, the pressure resistance, temperature resistance and sealing performance of the steam injection wellhead device are evaluated.

5. The method according to claim 1, characterized in that The well barrier of the production well bore includes a cement ring, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, including: Determining the evaluation index of the cement sheath as pressure resistance; The pressure resistance of the cement sheath is evaluated by performing cementing quality logging on the cement sheath.

6. The method according to claim 1, characterized in that The well barrier of the production well bore comprises a casing, and the evaluation index of the well barrier corresponding to the steam injection well bore and the production well bore is determined, and the evaluation index is used to evaluate the well bore integrity of the steam injection well bore and the production well bore, and comprises: Determining that the evaluation index of the sleeve is airtightness; By performing a wellbore pressure test and a wall thickness test on the casing, the wall thickness loss degree of the casing is analyzed, and the wall thickness loss degree is used to evaluate the airtightness of the casing.

7. The method according to claim 1, characterized in that The well barrier of the production wellbore includes a casing head, and the evaluation index of the well barrier corresponding to the steam injection wellbore and the production wellbore is determined, and the evaluation index is used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore, including: Determining the evaluation indexes of the casing head to be pressure resistance, temperature resistance and corrosion resistance; By testing the wall thickness of the casing head, the wall thickness loss degree of the casing is analyzed, and the wall thickness loss degree is used to evaluate the pressure resistance, temperature resistance and corrosion resistance of the casing head.

8. A wellbore integrity evaluation device, characterized in that: The device comprises: A determination unit, configured to determine a risk point source affecting the integrity of the wellbore by analyzing the wellbore, wherein the wellbore includes a steam injection wellbore and a production wellbore; An evaluation unit is used to analyze the steam injection wellbore and the production wellbore according to the risk point source, and determine the evaluation indexes of the well barriers corresponding to the steam injection wellbore and the production wellbore, wherein the evaluation indexes are used to evaluate the wellbore integrity of the steam injection wellbore and the production wellbore.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one program code, and the at least one program code is loaded and executed by a processor to implement the operations performed by the method according to any one of claims 1 to 7.

10. An electronic device, characterized in that: The electronic device includes one or more processors and one or more memories, wherein the one or more memories store at least one program code, and the at least one program code is loaded and executed by the one or more processors to implement the operations performed by the method according to any one of claims 1 to 7.

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