WO2024088149A1 - Method and apparatus for estimating service life of old well to be converted, and electronic device - Google Patents

Abstract

The present invention relates to the technical field of computers. Provided are a method and apparatus for estimating the service life of an old well to be converted, and an electronic device. The method comprises: acquiring data of an old well to be converted and data of scrapped old wells; performing calculation according to the data of said old well and the data of the scrapped old wells, so as to obtain a risk coefficient of said old well, wherein the risk coefficient of said old well is used for representing the degree of risk of said old well failing; acquiring data of a carbon dioxide flooding injection well; performing calculation according to the data of the carbon dioxide flooding injection well, so as to obtain the service life of the carbon dioxide flooding injection well; and performing calculation according to the risk coefficient of said old well and the service life, so as to obtain a target service life. By means of accurately estimating the service life of mineshafts of old wells to be converted, a reliable old well is screened out as an old well to be converted, thereby ensuring the smooth implementation of subsequent carbon dioxide flooding injection for an old well to be converted.

Description

Method, device and electronic equipment for estimating the service life of old wells to be recharged Technical Field

The present invention relates to the field of computer technology, and in particular to a method for estimating the service life of an old well to be re-injected, a device for estimating the service life of an old well to be re-injected, an electronic device and a computer-readable storage medium.

Background technique

The use of carbon dioxide to improve oil recovery is a mature technology that has been used in the oil industry for decades. In recent years, the application of carbon dioxide-EOR technology in the development of unconventional oil reservoirs has gradually become economically feasible. The main advantage of carbon dioxide is that carbon dioxide can easily form a miscible phase with crude oil, making its effect of improving oil recovery significantly better than other displacement agents. At the same time, under the "dual carbon" goal, oil fields are ideal places to achieve greenhouse gas storage and large-scale utilization. Carbon dioxide flooding can achieve the dual purposes of carbon dioxide storage and improved oil recovery.

Relevant research at home and abroad shows that when old wells are converted to carbon dioxide flooding gas injection wells, due to the long-term operation of the old wells, the wellbore is prone to wellbore quality problems such as poor sealing. At this time, there is a greater risk of gas leakage when converted to carbon dioxide flooding gas injection wells, which seriously affects the normal progress of the subsequent gas injection process and production safety.

The evaluation of the quality of the wellbore for conversion from old wells to CO2 injection wells is usually completed by estimating their service life. However, at present, the mature domestic standards for evaluating the service life of wellbore are mainly aimed at high-temperature, high-pressure and highly acidic wells. The loading conditions of the tubing and cement ring of CO2 injection wells are complex, and they are prone to failure due to the downhole temperature and the overall pressure difference in the wellbore, which seriously affects the development effect of the normal gas injection process. At the same time, it also has a great impact on the estimated service life of the wellbore of CO2 injection wells, resulting in low accuracy of the estimated results. For this reason, there is an urgent need for a method to accurately estimate the service life of the wellbore of old wells converted to CO2 injection wells, so as to screen out reliable old wells and ensure that CO2 injection can be carried out smoothly.

Summary of the invention

The purpose of the present invention is to provide a method, device and electronic equipment for estimating the service life of old wells to be converted for injection. By accurately estimating the service life of the wellbore of the old wells to be converted for injection, reliable old wells are screened out as old wells to be converted for injection, ensuring that the subsequent carbon dioxide injection of the old wells to be converted is carried out smoothly, thereby converting them into carbon dioxide injection wells.

In order to achieve the above object, an embodiment of the present invention provides a method for estimating the service life of an old well to be re-injected, the method comprising:

Obtain the data of old wells to be injected and the data of abandoned old wells, wherein the data of old wells to be injected is used to characterize the data of old wells to be injected. The status of the old wells, wherein the abandoned old well data is used to characterize the status of the abandoned old wells;

The risk coefficient of the old well to be injected is calculated based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected;

Acquiring carbon dioxide injection well data, wherein the carbon dioxide injection well data is used to characterize the status of existing carbon dioxide injection wells;

Calculate the service life of the carbon dioxide injection well according to the carbon dioxide injection well data;

The target service life is calculated based on the risk coefficient of the old well to be converted and the service life. The target service life is used to characterize the expected service life of the old well to be converted after it is converted into a carbon dioxide injection well.

Specifically, the data of the old well to be injected include the casing data of the old well to be injected and the cement ring data of the old well to be injected, and the data of the abandoned old well include the casing data of the abandoned old well and the cement ring data of the abandoned old well. The risk coefficient of the old well to be injected is calculated based on the data of the old well to be injected and the data of the abandoned old well, including:

Calculate and obtain a casing risk coefficient based on the casing data of the old well to be re-injected and the casing data of the abandoned old well;

The cement sheath risk coefficient is calculated based on the cement sheath data of the old well to be re-injected and the cement sheath data of the abandoned old well;

A larger value is selected from the casing risk coefficient and the cement sheath risk coefficient as the risk coefficient of the old well to be re-injected.

Specifically, the casing data of the old well to be re-injected includes the casing deformation amount of the old well to be re-injected and the casing wear amount of the old well to be re-injected, and the casing data of the abandoned old well includes the casing deformation amount of the abandoned old well and the casing wear amount of the abandoned old well. The casing risk coefficient is calculated according to the casing data of the old well to be re-injected and the casing data of the abandoned old well, including:

Calculate the casing deformation ratio according to the casing deformation of the old well to be re-injected and the casing deformation of the abandoned old well;

Calculate the casing wear ratio according to the casing wear amount of the old well to be re-injected and the casing wear amount of the abandoned old well;

The larger value is selected from the casing deformation ratio and the casing wear ratio as the casing risk coefficient.

Specifically, the cement ring data of the old well to be recharged includes the cement ring sound amplitude change value of the old well to be recharged, and the cement ring data of the abandoned old well includes the cement ring sound amplitude change value of the abandoned old well. The cement ring risk coefficient is calculated according to the cement ring data of the old well to be recharged and the cement ring data of the abandoned old well, including:

The ratio between the change value of the cement ring acoustic amplitude of the old well to be recharged and the change value of the cement ring acoustic amplitude of the abandoned old well is calculated, and the ratio is used as the cement ring risk coefficient.

Specifically, the carbon dioxide injection well data include the casing deformation of the carbon dioxide injection well under the condition of casing failure, the annual average deformation of the casing of the carbon dioxide injection well, the casing wear of the carbon dioxide injection well under the condition of casing failure, the annual average wear of the casing of the carbon dioxide injection well, the acoustic amplitude loss of the carbon dioxide injection well under the condition of cement sheath failure, and the annual average cementation loss of the cement sheath of the carbon dioxide injection well. The service life of the carbon dioxide injection well calculated according to the carbon dioxide injection well data includes:

A first ratio is obtained by calculating the casing deformation of the carbon dioxide injection well under casing failure conditions and the average annual casing deformation of the carbon dioxide injection well;

A second ratio is obtained by calculating the casing wear amount of the carbon dioxide injection well under the condition of casing failure and the average annual casing wear amount of the carbon dioxide injection well;

A third ratio is obtained by calculating the acoustic amplitude loss of the carbon dioxide injection well under the condition of cement sheath failure and the average annual cementation loss of the cement sheath of the carbon dioxide injection well;

The minimum value is selected from the first ratio, the second ratio and the third ratio as the service life.

Specifically, the target service life is calculated based on the risk coefficient of the old well to be injected and the service life, including:

Calculate the product of the risk coefficient of the old well to be re-injected and the service life to obtain a product result;

The difference between the useful life and the product result is calculated, and the difference is used as the target useful life.

On the other hand, an embodiment of the present invention provides a device for estimating the service life of an old well to be re-injected, the device comprising:

The first data acquisition unit is used to acquire the data of old wells to be injected and the data of abandoned old wells. The injection old well data is used to characterize the status of the old wells to be injected, and the abandoned old well data is used to characterize the status of the abandoned old wells;

A risk coefficient calculation unit, used for calculating the risk coefficient of the old well to be injected based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected;

A second data acquisition unit is used to acquire carbon dioxide injection well data, wherein the carbon dioxide injection well data is used to characterize the status of the existing carbon dioxide injection well;

A carbon dioxide flooding injection well service life calculation unit, used for calculating the service life of the carbon dioxide flooding injection well according to the carbon dioxide flooding injection well data;

The service life calculation unit of the old well to be converted into injection well is used to calculate the target service life according to the risk coefficient of the old well to be converted into injection well and the service life, and the target service life is used to characterize the expected service life of the old well to be converted into injection well after being converted into CO2 injection well.

Specifically, the data of the old well to be re-injected includes the casing data of the old well to be re-injected and the cement ring data of the old well to be re-injected, the data of the abandoned old well includes the casing data of the abandoned old well and the cement ring data of the abandoned old well, and the risk coefficient calculation unit includes:

A casing risk coefficient calculation subunit, used for calculating the casing risk coefficient according to the casing data of the old well to be re-injected and the casing data of the abandoned old well;

The cement sheath risk coefficient calculation subunit is used to calculate the cement sheath risk coefficient according to the cement sheath data of the old well to be injected and the cement sheath data of the abandoned old well.

In another aspect, an embodiment of the present invention provides an electronic device, the electronic device comprising:

at least one processor;

a memory connected to the at least one processor;

The memory stores instructions that can be executed by the at least one processor, and the at least one processor implements the aforementioned method by executing the instructions stored in the memory.

On the other hand, an embodiment of the present invention provides a computer-readable storage medium storing computer instructions, which, when executed on a computer, enable the computer to execute the aforementioned method.

The present invention accurately estimates the service life of the wellbore of the old well to be injected, selects reliable old wells as the old wells to be injected, ensures that the subsequent carbon dioxide injection of the old wells to be injected is carried out smoothly, and thus converts the old wells to carbon dioxide. Carbon flooding injection well.

Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings:

FIG1 is a schematic flow chart of a method for estimating the useful life of an old well to be re-injected according to an embodiment of the present application;

FIG2 is a schematic diagram of a structure of a device for estimating the service life of an old well to be re-injected provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention.

Detailed ways

The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

The terms "first", "second", etc. in this application are used to distinguish different objects rather than to describe a specific order. At the same time, the term "include" and any form of its variation are intended to cover non-exclusive inclusions.

The embodiments of the present application provide a method, device, electronic device and computer-readable storage medium for estimating the useful life of an old well to be re-injected.

The device can be integrated into a computer device, and the electronic device can be a terminal, a server, or other devices. The terminal can be a mobile phone, a tablet computer, a smart Bluetooth device, a notebook computer, or a personal computer (PC), etc. The server can be a single server or a server cluster composed of multiple servers.

In some embodiments, the device may also be integrated into multiple electronic devices. For example, the device may be integrated into multiple servers, and the method of the present application may be implemented by multiple servers.

In some embodiments, the server may also be implemented in the form of a terminal.

It should be noted that the serial numbers of the following embodiments are not intended to limit the preferred order of the embodiments.

Example 1

The embodiment of the present invention provides a method for estimating the service life of an old well to be re-injected, as shown in FIG1 . The specific process of the method includes steps 110 to 150:

110. Obtain data of old wells to be injected and data of abandoned old wells, wherein the data of old wells to be injected is used to characterize the conditions of the old wells to be injected, and the data of abandoned old wells is used to characterize the conditions of the abandoned old wells.

Data refers to symbols that record and identify objective events. It is a physical symbol or a combination of these physical symbols that records the nature, state, and mutual relationship of objective things. It is a recognizable and abstract symbol. It not only refers to numbers in a narrow sense, but also can be a combination of words, letters, digital symbols, graphics, images, videos, audio, etc. with certain meanings. It is also an abstract representation of the attributes, quantity, position and mutual relationship of objective things. For example, "0, 1, 2...", "cloudy, rainy, falling, temperature", "students' file records, cargo transportation conditions" and so on are all data.

In combination with the embodiments of the present application, the data of the old wells to be transferred and injected are used to record the current situation and historical records of the old wells to be transferred and injected, including the injection/production operation time, tubing model and material, and cement slurry density of the old wells to be transferred and injected, and also include cementing quality evaluation data and casing monitoring data obtained from the logging data of the old wells to be transferred and injected at the beginning of the operation, as well as casing damage data and cementing cement ring data obtained from logging the target layer of the old wells to be transferred and injected before the transfer and injection.

In some embodiments of the present application, the abandoned old well data are abandoned well data caused by failure of casing and cement ring, including the production years of the abandoned old wells, the degree of casing damage and cement ring bonding of the abandoned wells obtained from logging data, so as to determine the safety limits of casing and cement ring under the operating environment of the area.

In some embodiments of the present application, a database may be established based on the data of the old wells to be injected and the data of the abandoned old wells to facilitate subsequent query or use.

120. Calculate the risk coefficient of the old well to be injected based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected.

In some embodiments of the present application, the data of the old wells to be injected include the casing data of the old wells to be injected and the cement ring data of the old wells to be injected, and the data of the abandoned old wells include the casing data of the abandoned old wells and the cement ring data of the abandoned old wells.

Specifically, step 120 includes the process shown in steps 121 to 123:

121. Calculate and obtain a casing risk coefficient based on the casing data of the old well to be re-injected and the casing data of the abandoned old well.

122. Calculate the cement ring risk coefficient based on the cement ring data of the old well to be injected and the cement ring data of the abandoned old well.

123. Select a larger value from the casing risk coefficient and the cement ring risk coefficient as the risk coefficient of the old well to be re-injected.

In some embodiments of the present application, the casing data of the old well to be re-injected includes the casing deformation amount of the old well to be re-injected and the casing wear amount of the old well to be re-injected, and the casing data of the abandoned old well includes the casing deformation amount of the abandoned old well and the casing wear amount of the abandoned old well.

Specifically, step 121 includes the process shown in steps 121a to 121c:

121a. Calculate the casing deformation ratio according to the casing deformation of the old well to be re-injected and the casing deformation of the abandoned old well.

121b. Calculate the casing wear ratio according to the casing wear of the old well to be re-injected and the casing wear of the abandoned old well.

121c. Select a larger value from the casing deformation ratio and the casing wear ratio as the casing risk coefficient.

In some embodiments of the present application, the cement ring data of the old well to be re-injected includes the cement ring sound amplitude change value of the old well to be re-injected, and the cement ring data of the abandoned old well includes the cement ring sound amplitude change value of the abandoned old well.

Specifically, step 122 includes the following process:

The ratio between the change value of the cement ring acoustic amplitude of the old well to be recharged and the change value of the cement ring acoustic amplitude of the abandoned old well is calculated, and the ratio is used as the cement ring risk coefficient.

In some embodiments of the present application, the risk coefficient of the old well to be injected is R, where R is the maximum value among the risk coefficients of each component, and R is expressed by the following calculation formula:

Wherein, n is the number of components involved in the evaluation, where n=2. Specifically in this embodiment, it refers to the casing and the cement ring. The number of components involved in the evaluation may also be increased as needed. h(i) is the risk factor of failure of component i. Specifically in this embodiment, h(i) represents the casing risk factor or the cement ring risk factor.

Specifically, h(i) is expressed by the following calculation formula:

Among them, △xmax is the casing deformation of the old well to be injected, and △ _xfailure is the casing deformation of the abandoned old well; △δmax is the casing wear of the old well to be injected, and △ _δfailure is the casing wear of the abandoned old well; △CBL is the change value of the cement ring acoustic amplitude of the old well to be injected measured by CBL logging, and △ _CBLfailure is the change value of the cement ring acoustic amplitude of the abandoned old well measured by CBL logging due to cement ring bonding failure; specifically, when i=1, h(i) represents the casing risk coefficient, and when i=2, h(i) represents the cement ring risk coefficient.

130. Acquire carbon dioxide injection well data, where the carbon dioxide injection well data is used to characterize the status of existing carbon dioxide injection wells.

In some embodiments of the present application, a database of carbon dioxide injection wells may be established based on relevant detection data of newly drilled carbon dioxide injection wells located in the same area as the old well to be injected.

Specifically, similar to the old wells to be injected and the abandoned old wells, the CO2 injection well data include the change data from the initial stage to the time when the components fail. More specifically, the CO2 injection well data include the casing deformation of the CO2 injection well under the condition of casing failure, the annual average deformation of the casing of the CO2 injection well, the casing wear of the CO2 injection well under the condition of casing failure, the annual average wear of the casing of the CO2 injection well, the acoustic amplitude loss of the CO2 injection well under the condition of cement sheath failure, and the annual average cementation loss of the cement sheath of the CO2 injection well.

140. Calculate the service life of the carbon dioxide injection well according to the carbon dioxide injection well data.

Specifically, step 140 includes the process shown in steps 141 to 144:

141. Calculate a first ratio according to the casing deformation of the carbon dioxide injection well under casing failure conditions and the average annual casing deformation of the carbon dioxide injection well.

142. Calculate a second ratio according to the casing wear amount of the carbon dioxide injection well under casing failure conditions and the average annual casing wear amount of the carbon dioxide injection well.

143. A third ratio is obtained by calculating based on the acoustic amplitude loss of the carbon dioxide injection well under the condition of cement sheath failure and the average annual cementation loss of the cement sheath of the carbon dioxide injection well.

144. Select a minimum value from the first ratio, the second ratio and the third ratio as the service life.

Specifically, the useful life can be expressed by the following calculation formula:

Wherein, Tco ₂ represents the service life, represents the maximum deformation amount when the casing fails under the condition of carbon dioxide flooding, that is, the casing deformation amount of the carbon dioxide flooding injection well under the condition of casing failure; It represents the maximum erosion amount of the casing wall thickness when the casing fails under the carbon dioxide flooding condition, that is, the casing wear amount of the carbon dioxide flooding injection well under the condition of casing failure; represents the acoustic amplitude loss of cement sheath detection under carbon dioxide flooding conditions, that is, the acoustic amplitude loss of the carbon dioxide flooding injection well under the condition of cement sheath failure; v _{x deformation rate is} the average annual deformation of the casing under carbon dioxide flooding conditions, that is, the average annual deformation of the casing of the carbon dioxide flooding injection well; v _{δ deformation rate is the} average annual wall thickness reduction of the casing under carbon dioxide flooding conditions, that is, the average annual wear of the casing of the carbon dioxide flooding injection well; v _{CBL cementation loss rate is the} average annual wear of the casing of the carbon dioxide flooding injection well; The average annual cement loss of the cement sheath under injection conditions, that is, the average annual cement loss of the cement sheath of the carbon dioxide injection well.

150. Calculate a target useful life based on the risk coefficient of the old well to be converted and the useful life, wherein the target useful life is used to characterize the estimated useful life of the old well to be converted after it is converted into a carbon dioxide injection well.

Specifically, step 150 includes the process shown in step 151 to step 152:

Calculate the product of the risk coefficient of the old well to be re-injected and the service life to obtain a product result;

The difference between the useful life and the product result is calculated, and the difference is used as the target useful life.

In some embodiments of the present application, the target useful life is calculated by the following formula:

Wherein, Y represents the target service life, R represents the risk factor of the old well to be re-injected, and T _co2 represents the service life.

In summary, by accurately estimating the service life of the old wells to be converted, reliable old wells are selected as the old wells to be converted, ensuring that the subsequent carbon dioxide injection of the old wells to be converted proceeds smoothly, so that they can be converted into carbon dioxide injection wells.

Based on the above content, the process of the method is described below through a specific implementation process:

First, a historical database of an old water injection well X and other old water injection wells in the same area was established, and the historical production pressure, wellbore temperature, oil pressure data, casing pressure data, cementing quality evaluation data, pipe string model and material data of Well X were collected. The logging data of casing and cement sheath before completion and transfer of Well X were collected and sorted. At the same time, the logging data of all old wells in the same area of Well X that were scrapped due to casing and cement sheath failure should be collected, mainly including the deformation and wall thickness changes at the time of casing failure and completion, and the logging data of cementation degree at the time of cement sheath failure. Finally, a risk assessment of Well X was established based on the data of scrapped wells in the same area of Well X. The collected data are shown in Table 1.

Table 1 Old well database

From the above, we can know that the risk coefficient R of well X is:

Next, a database of carbon dioxide injection wells was established. Based on the relevant operation sample data of multiple newly drilled carbon dioxide injection wells in the same area, the failure risk coefficients of casing and cement sheath under carbon dioxide injection conditions were assigned.

Table 2 CO2 injection well database

The useful life of a newly drilled CO2 injection well is:

Then the service life of old well X converted into a carbon dioxide injection well is:

The calculation results show that the service life of the old well X after it is converted into a CO2 injection well is about 6 years. It can be seen that the well is a medium-risk well and can be used as a test injection well to collect CO2 injection related data. As the number of CO2 injection wells in the same area as Well X increases, the database of CO2 injection wells collected will be more accurate, and the risk description of Well X will be more realistic.

Example 2

The embodiment of the present invention and the embodiment 1 both belong to the same inventive concept. The embodiment of the present invention provides a device for estimating the service life of an old well to be re-injected, as shown in FIG2 , the device comprising:

The first data acquisition unit 201 is used to acquire data of old wells to be injected and data of abandoned old wells, wherein the data of old wells to be injected is used to characterize the status of old wells to be injected, and the data of abandoned old wells is used to characterize the status of abandoned old wells;

A risk coefficient calculation unit 202 is used to calculate the risk coefficient of the old well to be injected based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected;

A second data acquisition unit 203 is used to acquire carbon dioxide injection well data, wherein the carbon dioxide injection well data is used to characterize the status of the existing carbon dioxide injection wells;

A carbon dioxide injection well service life calculation unit 204 is used to calculate the service life of the carbon dioxide injection well according to the carbon dioxide injection well data;

The service life calculation unit 205 of the old well to be converted into injection well is used to calculate the target service life according to the risk coefficient of the old well to be converted into injection well and the service life, and the target service life is used to characterize the expected service life of the old well to be converted into a carbon dioxide injection well.

Specifically, the risk coefficient calculation unit includes:

A casing risk coefficient calculation subunit, used for calculating the casing risk coefficient according to the casing data of the old well to be re-injected and the casing data of the abandoned old well;

The cement sheath risk coefficient calculation subunit is used to calculate the cement sheath risk coefficient according to the cement sheath data of the old well to be injected and the cement sheath data of the abandoned old well.

In specific implementation, the above units can be implemented as independent entities, or can be arbitrarily combined to be implemented as the same or several entities. The specific implementation of the above units can refer to the previous method embodiments, which will not be repeated here.

Example 3

The embodiment of the present invention and embodiments 1 and 2 all belong to the same inventive concept. The embodiment of the present invention provides an electronic device, the electronic device

It can be a terminal, a server, etc. Among them, the terminal can be a mobile phone, a tablet computer, a smart Bluetooth device, a laptop, a personal computer, etc.; the server can be a single server or a server cluster composed of multiple servers, etc.

In some embodiments, the apparatus may also be integrated into multiple devices. For example, the apparatus may be integrated into multiple servers, and the method of the present application may be implemented by multiple servers.

For example, as shown in FIG3 , it shows a schematic diagram of the structure of the device involved in the embodiment of the present application, specifically:

The device may include one or more processing cores of the processor 301, one or more storage media 302, a power supply 303, an input module 304, and a communication module 305. Those skilled in the art will appreciate that the device structure shown in FIG3 does not constitute a limitation on the device, and may include more or fewer components than shown, or combine certain components, or arrange the components differently. Among them:

The processor 301 is the control center of the device, and uses various interfaces and lines to connect various parts of the entire device. It executes various functions of the device and processes data by running or executing software programs and/or modules stored in the memory 302, and calling data stored in the memory 302. In some embodiments, the processor 301 may include one or more processing cores; in some embodiments, the processor 301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

The memory 302 can be used to store software programs and modules. The processor 301 executes various functional applications and data processing by running the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the device, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices. Accordingly, the memory 302 may also include a memory controller to provide the processor 301 with access to the memory 302.

The device also includes a power supply 303 for supplying power to various components. In some embodiments, the power supply 303 can be logically connected to the processor 301 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. The power supply 303 can also include any components such as one or more DC or AC power supplies, recharging systems, power failure detection circuits, power converters or inverters, and power status indicators.

The device may further include an input module 304, which may be used to receive input digital or character information and generate keyboard, mouse, joystick, optical or trackball signal input related to user settings and function control.

The device may also include a communication module 305. In some embodiments, the communication module 305 may include a wireless module. The device may perform short-range wireless transmission through the wireless module of the communication module 305, thereby providing users with wireless broadband Internet access. For example, the communication module 305 may be used to help users send and receive emails, browse web pages, and access streaming media.

Although not shown, the device may further include a display unit, etc., which will not be described in detail herein. Specifically in this embodiment, the processor 301 in the device will load the executable files corresponding to the processes of one or more application programs into the memory 302 according to the following instructions, and the processor 301 will run the application programs stored in the memory 302, thereby realizing various functions, as follows:

Acquire data of old wells to be injected and data of abandoned old wells, wherein the data of old wells to be injected is used to characterize the conditions of the old wells to be injected, and the data of abandoned old wells is used to characterize the conditions of the abandoned old wells;

The risk coefficient of the old well to be injected is calculated based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected;

Acquiring carbon dioxide injection well data, wherein the carbon dioxide injection well data is used to characterize the status of existing carbon dioxide injection wells;

Calculate the service life of the carbon dioxide injection well according to the carbon dioxide injection well data;

The target service life is calculated based on the risk coefficient of the old well to be converted and the service life. The target service life is used to characterize the expected service life of the old well to be converted after it is converted into a carbon dioxide injection well.

The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

A person skilled in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be completed by instructions, or by controlling related hardware through instructions. The instructions may be stored in a storage medium and loaded and executed by a processor.

To this end, an embodiment of the present application provides a computer-readable storage medium, in which a plurality of instructions are stored, and the instructions can be loaded by a processor to execute the steps in any of the methods provided in the embodiments of the present application. For example, the instructions can execute the following steps:

Acquire data of old wells to be injected and data of abandoned old wells, wherein the data of old wells to be injected is used to characterize the status of old wells to be injected, and the data of abandoned old wells is used to characterize the status of abandoned old wells;

The risk coefficient of the old well to be injected is calculated based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected;

Acquiring carbon dioxide injection well data, wherein the carbon dioxide injection well data is used to characterize the status of existing carbon dioxide injection wells;

Calculate the service life of the carbon dioxide injection well according to the carbon dioxide injection well data;

The target service life is calculated based on the risk coefficient of the old well to be converted and the service life. The target service life is used to characterize the expected service life of the old well to be converted after it is converted into a carbon dioxide injection well.

The specific implementation of the above operations can be found in the previous embodiments, which will not be described in detail here.

Among them, the storage medium may include: read-only memory (ROM), random access memory (RAM), disk or CD, etc.

Since the instructions stored in the storage medium can execute the steps in any one of the methods provided in the embodiments of the present application, the beneficial effects that can be achieved by any one of the methods provided in the embodiments of the present application can be achieved. Please refer to the previous embodiments for details and will not be repeated here.

Some optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims (10)

1. A method for estimating the service life of an old well to be re-injected, characterized in that the method comprises:

   Acquire data of old wells to be injected and data of abandoned old wells, wherein the data of old wells to be injected is used to characterize the conditions of the old wells to be injected, and the data of abandoned old wells is used to characterize the conditions of the abandoned old wells;

   The risk coefficient of the old well to be injected is calculated based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected;

   Acquiring carbon dioxide injection well data, wherein the carbon dioxide injection well data is used to characterize the status of existing carbon dioxide injection wells;

   Calculate the service life of the carbon dioxide injection well according to the carbon dioxide injection well data;

   The target service life is calculated based on the risk coefficient of the old well to be converted and the service life. The target service life is used to characterize the expected service life of the old well to be converted after it is converted into a carbon dioxide injection well.
2. The method according to claim 1 is characterized in that the data of the old well to be injected includes the casing data of the old well to be injected and the cement ring data of the old well to be injected, and the data of the abandoned old well includes the casing data of the abandoned old well and the cement ring data of the abandoned old well, and the risk coefficient of the old well to be injected is calculated based on the data of the old well to be injected and the data of the abandoned old well, comprising:

   Calculate and obtain a casing risk coefficient based on the casing data of the old well to be re-injected and the casing data of the abandoned old well;

   The cement sheath risk coefficient is calculated based on the cement sheath data of the old well to be re-injected and the cement sheath data of the abandoned old well;

   A larger value is selected from the casing risk coefficient and the cement sheath risk coefficient as the risk coefficient of the old well to be re-injected.
3. The method according to claim 2 is characterized in that the casing data of the old well to be re-injected includes the casing deformation amount of the old well to be re-injected and the casing wear amount of the old well to be re-injected, and the casing data of the abandoned old well includes the casing deformation amount of the abandoned old well and the casing wear amount of the abandoned old well, and the casing risk coefficient is calculated according to the casing data of the old well to be re-injected and the casing data of the abandoned old well, comprising:

   Calculate the casing deformation ratio according to the casing deformation of the old well to be re-injected and the casing deformation of the abandoned old well;

   Calculate the casing wear ratio according to the casing wear amount of the old well to be re-injected and the casing wear amount of the abandoned old well;

   A larger value is selected from the casing deformation ratio and the casing wear ratio as the casing risk coefficient.
4. The method according to claim 2 is characterized in that the cement ring data of the old well to be injected includes the cement ring sound amplitude change value of the old well to be injected, and the cement ring data of the abandoned old well includes the cement ring sound amplitude change value of the abandoned old well, and the cement ring risk coefficient is calculated based on the cement ring data of the old well to be injected and the cement ring data of the abandoned old well, comprising:

   The ratio between the change value of the cement ring acoustic amplitude of the old well to be recharged and the change value of the cement ring acoustic amplitude of the abandoned old well is calculated, and the ratio is used as the cement ring risk coefficient.
5. The method according to claim 1 is characterized in that the carbon dioxide injection well data includes the casing deformation of the carbon dioxide injection well under the condition of casing failure, the annual average deformation of the casing of the carbon dioxide injection well, the casing wear of the carbon dioxide injection well under the condition of casing failure, the annual average wear of the casing of the carbon dioxide injection well, the acoustic amplitude loss of the carbon dioxide injection well under the condition of cement sheath failure and the annual average cementation loss of the cement sheath of the carbon dioxide injection well, and the service life of the carbon dioxide injection well is calculated according to the carbon dioxide injection well data, comprising:

   A first ratio is obtained by calculating the casing deformation of the carbon dioxide injection well under casing failure conditions and the average annual casing deformation of the carbon dioxide injection well;

   A second ratio is obtained by calculating the casing wear amount of the carbon dioxide injection well under the condition of casing failure and the average annual casing wear amount of the carbon dioxide injection well;

   A third ratio is obtained by calculating the acoustic amplitude loss of the carbon dioxide injection well under the condition of cement sheath failure and the average annual cementation loss of the cement sheath of the carbon dioxide injection well;

   The minimum value is selected from the first ratio, the second ratio and the third ratio as the service life.
6. The method according to claim 1 is characterized in that the step of calculating the target service life according to the risk coefficient of the old well to be re-injected and the service life comprises:

   Calculate the product of the risk coefficient of the old well to be re-injected and the service life to obtain a product result;

   The difference between the useful life and the product result is calculated, and the difference is used as the target useful life.
7. A device for estimating the service life of an old well to be recharged, characterized by comprising:

   A first data acquisition unit is used to acquire data of old wells to be injected and data of abandoned old wells, wherein the data of old wells to be injected is used to characterize the conditions of the old wells to be injected, and the data of abandoned old wells is used to characterize the conditions of the abandoned old wells;

   A risk coefficient calculation unit, used for calculating the risk coefficient of the old well to be injected based on the data of the old well to be injected and the data of the abandoned old well, wherein the risk coefficient of the old well to be injected is used to characterize the risk degree of failure of the old well to be injected;

   A second data acquisition unit is used to acquire carbon dioxide injection well data, wherein the carbon dioxide injection well data is used to characterize the status of the existing carbon dioxide injection well;

   A carbon dioxide flooding injection well service life calculation unit, used for calculating the service life of the carbon dioxide flooding injection well according to the carbon dioxide flooding injection well data;

   The service life calculation unit of the old well to be converted into injection well is used to calculate the target service life according to the risk coefficient of the old well to be converted into injection well and the service life, and the target service life is used to characterize the expected service life of the old well to be converted into injection well after being converted into CO2 injection well.
8. The device according to claim 7 is characterized in that the data of the old well to be re-injected includes the casing data of the old well to be re-injected and the cement ring data of the old well to be re-injected, the data of the abandoned old well includes the casing data of the abandoned old well and the cement ring data of the abandoned old well, and the risk coefficient calculation unit includes:

   A casing risk coefficient calculation subunit, used for calculating the casing risk coefficient according to the casing data of the old well to be re-injected and the casing data of the abandoned old well;

   The cement sheath risk coefficient calculation subunit is used to calculate the cement sheath risk coefficient according to the cement sheath data of the old well to be injected and the cement sheath data of the abandoned old well.
9. An electronic device, characterized in that the electronic device comprises:

   at least one processor;

   a memory connected to the at least one processor;

   The memory stores instructions that can be executed by the at least one processor, and the at least one processor implements the method of any one of claims 1 to 6 by executing the instructions stored in the memory.
10. A computer-readable storage medium stores computer instructions, which, when executed on a computer, enable the computer to execute the method described in any one of claims 1 to 6.