Method, device, storage medium and system for monitoring working condition of carbon dioxide huff and puff well

Abstract

The embodiment of the invention provides a working condition monitoring method, device and system for a carbon dioxide huff-puff well, and a storage medium, and belongs to the technical field of working condition monitoring of carbon dioxide huff-puff wells. The working condition monitoring method for the carbon dioxide huff and puff well comprises the following steps: acquiring data of a plurality of monitoring parameters of the carbon dioxide huff and puff well through a multi-parameter water content meter; determining the working condition of the carbon dioxide huff and puff well according to the obtained data of the plurality of monitoring parameters; and when the working condition is an abnormal working condition, abnormal working condition information is sent. According to the embodiment of the invention, no equipment or algorithm needs to be newly added, and the working condition of the carbon dioxide huff and puff well is determined only by acquiring the data of the multiple corresponding monitoring parameters through the multi-parameter water-containing instrument configured in the carbon dioxide huff and puff well. Abnormal working conditions such as gas slug, continuous pumping and spraying, oil blockage, gas continuous phase and ice blockage occurring in the exploitation stage of the carbon dioxide huff and puff well can be diagnosed and alarmed, and corresponding abnormal working condition treatment measures are provided.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide intake and puff well working condition monitoring technology, and in particular to a carbon dioxide intake and puff well working condition monitoring method, device, storage medium and system. Background Art

[0002] Carbon dioxide huff and puff is a production-increasing technology that uses the expansion, extraction and dissolution of carbon dioxide to supplement formation energy, improve recovery, and increase the production of oil wells in high-water-content heavy oil and bottom-water reservoirs. It is also an excellent carbon sequestration technology and has become a research hotspot in recent years. The water content of the wellhead output fluid is an important parameter for calculating the carbon dioxide conversion efficiency, evaluating the carbon dioxide huff and puff effect, and conducting operating condition diagnosis. However, the current water content sampling and testing methods used in oil fields have problems such as low efficiency, poor accuracy, low frequency, changes in fluid physical properties during sampling, and high cost, which cannot meet the requirements.

[0003] The emergence of water content meters has solved the problem of online testing of water content in conventional oil wells to a certain extent, but it does not meet the monitoring requirements of special working conditions such as carbon dioxide throughput wells with high gas content, high viscosity, and a large dynamic water content fluctuation range. Summary of the invention

[0004] An object of the embodiments of the present invention is to provide a method for monitoring the working conditions of a carbon dioxide intake and puff well, wherein the method for monitoring the working conditions of a carbon dioxide intake and puff well can monitor the working conditions of the carbon dioxide intake and puff well.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides a method for monitoring the operating conditions of a carbon dioxide intake and puffing well, and the method for monitoring the operating conditions of a carbon dioxide intake and puffing well comprises: obtaining data of multiple monitoring parameters of the carbon dioxide intake and puffing well through a multi-parameter water content meter; determining the operating condition of the carbon dioxide intake and puffing well through the obtained data of the multiple monitoring parameters; and sending abnormal operating condition information when the operating condition is an abnormal operating condition.

[0006] Optionally, the multiple monitoring parameters include the water content, temperature and pressure of the wellhead produced fluid of the carbon dioxide huff and puff well obtained by the multi-parameter water content meter.

[0007] Optionally, determining the operating condition of the carbon dioxide throughput well through the data of multiple monitoring parameters obtained includes: drawing corresponding real-time water content curve, real-time temperature curve and real-time pressure curve according to the acquired water content, temperature and pressure of the wellhead production fluid of the carbon dioxide throughput well; and determining the operating condition of the carbon dioxide throughput well based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve.

[0008] Optionally, determining the operating condition of the carbon dioxide throughput well based on the drawn real-time water cut curve, real-time temperature curve and real-time pressure curve includes: determining that the operating condition of the carbon dioxide throughput well is a normal condition when the following conditions are met: the real-time water cut curve changes periodically, and the difference between the peak and the trough of the periodic change does not exceed a preset value; and the changes of the real-time temperature curve and the real-time pressure curve are within a preset range.

[0009] Optionally, determining the operating condition of the carbon dioxide intake and puffing well based on the drawn real-time water cut curve, real-time temperature curve and real-time pressure curve includes: determining that the operating condition of the carbon dioxide intake and puffing well is an abnormal gas slug condition when the following conditions are met: the rising amplitude of the real-time water cut curve exceeds a first preset threshold, the rising amplitude of the real-time pressure curve exceeds a second preset threshold, and the falling amplitude of the real-time temperature curve exceeds a third preset threshold; and after a preset time, the real-time water cut curve, the real-time temperature curve and the real-time pressure curve change periodically.

[0010] Optionally, the operating condition of the carbon dioxide intake and puff well is determined based on the drawn real-time water cut curve, real-time temperature curve and real-time pressure curve, including: when the following conditions are met, determining that the operating condition of the carbon dioxide intake and puff well is a large amount of abnormal gas output condition: the real-time water cut curve changes periodically, and the frequency is greater than a first preset frequency, and the amplitude is greater than a first preset amplitude; the real-time pressure curve changes periodically, and the frequency is greater than a second preset frequency, and the amplitude is greater than a second preset amplitude; and the decline amplitude of the real-time temperature curve exceeds a fourth preset threshold.

[0011] Optionally, determining the operating condition of the carbon dioxide intake and puffing well based on the drawn real-time water cut curve, real-time temperature curve and real-time pressure curve includes: determining that the operating condition of the carbon dioxide intake and puffing well is an abnormal liquid phase slippage condition when the following conditions are met: the rising amplitude of the real-time pressure curve exceeds a fifth preset threshold and remains at the rising amplitude; the falling amplitude of the real-time temperature curve exceeds a sixth preset threshold and remains at the falling amplitude; and the real-time water cut curve does not change periodically.

[0012] Optionally, the operating condition of the carbon dioxide intake and puffing well is determined based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve, including: when the following conditions are met, determining that the operating condition of the carbon dioxide intake and puffing well is an abnormal freezing condition: the real-time pressure curve drops to 0; the temperature value shown by the real-time temperature curve is stable at the external ambient temperature; and the real-time water content curve has no fluctuation.

[0013] Optionally, the operating condition monitoring method for carbon dioxide throughput wells also includes: determining that the multi-parameter water content meter is abnormal when the following conditions are met: the amplitude changes of the real-time pressure curve and the real-time temperature curve are within a preset range; and the decrease amplitude of the real-time water content curve exceeds a seventh preset threshold.

[0014] An embodiment of the present invention also provides a control device for monitoring the operating conditions of a carbon dioxide intake and puffing well, the control device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the above-mentioned method for monitoring the operating conditions of a carbon dioxide intake and puffing well.

[0015] An embodiment of the present invention further provides a machine-readable storage medium, on which instructions are stored, and the instructions enable a machine to execute the above-mentioned method for monitoring the working condition of a carbon dioxide huff-and-puff well.

[0016] An embodiment of the present invention further provides a condition monitoring system for a carbon dioxide intake and puff well, the condition monitoring system for a carbon dioxide intake and puff well comprising the above-mentioned control device and a multi-parameter water content meter arranged at a preset position of each carbon dioxide intake and puff well.

[0017] Through the above technical solution, the embodiment of the present invention does not need to add any new equipment and algorithms, and only obtains the data of the corresponding multiple monitoring parameters through the multi-parameter water content meter configured in the carbon dioxide intake and puff well to determine the working condition of the carbon dioxide intake and puff well. It can realize the diagnosis and alarm of abnormal working conditions such as gas slug, continuous pumping and blowing, oil plugging, gas continuous phase, ice plugging, etc. that occur in the production stage of the carbon dioxide intake and puff well, and provide corresponding abnormal working condition processing measures.

[0018] 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

[0019] 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 implementations, 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:

[0020] Figure 1 It is a flow chart of a method for monitoring the working condition of a carbon dioxide huff-and-puff well provided by an embodiment of the present invention;

[0021] Figure 2 is a schematic diagram of monitoring parameters for an example gas slug abnormal condition;

[0022] Figure 3 is a schematic diagram illustrating monitoring parameters of a large number of abnormal gas outlet conditions; and

[0023] Figure 4 It is a schematic diagram of monitoring parameters of an example multi-parameter moisture meter anomaly. DETAILED DESCRIPTION

[0024] 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.

[0025] Figure 1 is a flow chart of a method for monitoring the working condition of a carbon dioxide huff and puff well provided by an embodiment of the present invention. Figure 1 The method for monitoring the working condition of a carbon dioxide huff and puff well may include the following steps:

[0026] Step S110: obtaining data of multiple monitoring parameters of the carbon dioxide huff and puff well through a multi-parameter water content meter.

[0027] The multiple monitoring parameters preferably in the embodiment of the present invention include the water content, temperature and pressure of the wellhead produced fluid of the carbon dioxide huff and puff well obtained by the multi-parameter water content meter.

[0028] The multi-parameter water content analyzer based on microwave technology in the embodiment of the present invention meets the application requirements of carbon dioxide huff and puff wells and realizes high-precision monitoring of water content in the full range of 0-100%. It adopts multi-antenna technology to realize the application requirements of gas-containing conditions. It adopts integrated probe design to realize integrated high-frequency monitoring of three parameters: water content, pressure, and temperature.

[0029] For example, a multi-parameter water content meter (for example, a multi-parameter microwave water content meter) installed behind the wellhead nozzle of a carbon dioxide intake and exhalation well can be used to collect the water content, temperature and pressure data of the wellhead produced fluid in real time.

[0030] Step S120: determining the operating condition of the carbon dioxide huff and puff well through the obtained data of multiple monitoring parameters.

[0031] Preferably, step S120 may include: drawing corresponding real-time water content curve, real-time temperature curve and real-time pressure curve according to the acquired water content, temperature and pressure of the wellhead production fluid of the carbon dioxide intake and puff well; and determining the operating condition of the carbon dioxide intake and puff well based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve.

[0032] Through step S110, the water content, temperature and pressure data of the wellhead output fluid are collected in real time, and the corresponding real-time water content curve, real-time temperature curve and real-time pressure curve are drawn, such as Figure 2As shown; based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve, determining the working condition of the carbon dioxide huff and puff well may include:

[0033] 1) Preferably, when the following conditions are met, the operating condition of the carbon dioxide consumption well is determined to be normal: the real-time water content curve changes periodically, and the difference between the peak and the trough of the periodic change does not exceed a preset value; and the changes of the real-time temperature curve and the real-time pressure curve are within a preset range.

[0034] To illustrate by example, the real-time water content curve, real-time temperature curve and real-time pressure curve record the corresponding data changes in real time. When the data shows that the water content of the upstroke and downstroke of the pump presents a small periodic change (for example, the water content of the upstroke is low and the water content of the downstroke is high, or the water content of the upstroke is high and the water content of the downstroke is low), the difference between the peak and the trough of the periodic water content value does not exceed the preset value, which is, for example, 103% of the difference between the peak and the trough of the water content value of the last recording cycle; it shows that the temperature and pressure are basically stable, for example, the fluctuation of the current real-time temperature curve and the real-time pressure curve does not exceed 1% (of the last recording cycle). When the above conditions are met, it is determined that the working condition of the carbon dioxide injection well is normal. Among them, the fluid at the wellhead of the upstroke flows, showing a normal water content, and the fluid of the downstroke hardly flows. Gas and oil move upward because their density is lower than that of water. If the water content meter is connected to a high-level pipeline, the water content will decrease, and if it is connected to a low-level pipeline, the water content will increase.

[0035] 2) Preferably, when the following conditions are met, the operating condition of the carbon dioxide huff and puff well is determined to be an abnormal gas slug condition: the rising amplitude of the real-time water content curve exceeds a first preset threshold, the rising amplitude of the real-time pressure curve exceeds a second preset threshold, and the falling amplitude of the real-time temperature curve exceeds a third preset threshold; and after a preset time, the real-time water content curve, the real-time temperature curve and the real-time pressure curve change periodically.

[0036] For example, when the real-time moisture content curve shows that the moisture content has increased significantly, the increase exceeds the first preset threshold (for example, the increase in the moisture content of the current recording period exceeds 3% of the moisture content of the previous recording period), the pressure rises by more than the second preset threshold (for example, the increase in the pressure of the current recording period exceeds 5% of the pressure of the previous recording period), and the temperature drops by more than the third preset threshold (for example, the temperature drop of the current recording period exceeds 1% of the pressure of the previous recording period); after a period of time, the real-time moisture content curve, the real-time temperature curve and the real-time pressure curve recover and show a periodic change pattern, wherein the frequency is, for example, not greater than 1 Hz, such as Figure 2As shown. When the above conditions are met, the operating condition of the CO2 huff-and-puff well is determined to be an abnormal gas slug condition. Among them, when the gas outlet at the wellhead is high, the gas slug formed by the gas moving from the wellbore to the wellhead and expanding has a high pressure, and the temperature drops due to heat absorption during the expansion process; the gas slug carries less liquid and has a high liquid water content. The above preset thresholds can be set by machine learning based on a large amount of historical data under the current operating conditions.

[0037] Preferably, the embodiment of the present invention can also calculate the approximate gas output according to the abnormal working condition of gas slug. For example, the liquid phase flow Q is read by the well site metering equipment. Liquid , the unit is, for example, cubic meters per day; through the inner diameter D of the water content meter (in millimeters), the fluid flow rate v can be calculated to be v = 4QLiquid / (86400πD 2 T Liquid )(unit: mm / s), where T Liquid is the time (in seconds) that is not diagnosed as an abnormal gas slug condition in a day; then, the volume of gas slug produced per day under abnormal gas slug condition = πD 2 v(86400-T Gas ) / 4.

[0038] 3) Preferably, when the following conditions are met, the operating condition of the carbon dioxide consumption well is determined to be an abnormal condition of large amount of gas output: the real-time water content curve changes periodically, and the frequency is greater than the first preset frequency, and the amplitude is greater than the first preset amplitude; the real-time pressure curve changes periodically, and the frequency is greater than the second preset frequency, and the amplitude is greater than the second preset amplitude; and the decline amplitude of the real-time temperature curve exceeds the fourth preset threshold.

[0039] For example, when the real-time water content curve shows that the water content fluctuates violently, for example, the frequency is greater than the first preset frequency 1Hz, and the amplitude is greater than the first preset amplitude (for example, 103% of the amplitude of the previous recording cycle); when the real-time pressure curve shows that the pressure fluctuates violently, for example, the frequency is greater than the second preset frequency 1Hz, and the amplitude is greater than the second preset amplitude (for example, 105% of the amplitude of the previous recording cycle); when the real-time temperature curve shows that the temperature drops, for example, the drop amplitude exceeds the fourth preset threshold value 1%. When the above conditions are met, it is determined that the working condition of the carbon dioxide intake and exhalation well is a large amount of abnormal gas output, showing a "continuous pumping and blowing" phenomenon, as shown in 3. Among them, when the wellhead gas output is high, the gas moves from the downhole to the wellhead to expand to form a gas slug, the pressure is relatively high, and the heat absorption during the expansion process causes the temperature to drop; the gas slug carries less liquid, and the liquid phase water content is high. When a large amount of gas is produced but no gas slug is formed, the flow state is generally annular flow and bubbly flow, and the pressure and water content fluctuate frequently and cannot maintain a high level for a period of time. This can also distinguish the abnormal condition of gas slug from the abnormal condition of large amount of gas output ("continuous extraction and spraying" condition).

[0040] 4) Preferably, when the following conditions are met, the operating condition of the carbon dioxide consumption well is determined to be an abnormal liquid phase slippage condition: the rising amplitude of the real-time pressure curve exceeds the fifth preset threshold and remains at the rising amplitude; the falling amplitude of the real-time temperature curve exceeds the sixth preset threshold and remains at the falling amplitude; and the real-time water content curve does not change periodically.

[0041] To illustrate by way of example, when the real-time pressure curve shows that the pressure is rising, for example, the rising amplitude exceeds the fifth preset threshold value (for example, the rising amplitude exceeds 5% of the previous recording cycle) and is stable; the real-time temperature curve shows that the temperature is decreasing, for example, the falling amplitude exceeds the sixth preset threshold value (for example, the falling amplitude exceeds 1% of the previous recording cycle) and is stable; the real-time water content curve shows that the water content is abnormal and fluctuates over a large range, for example, the fluctuation has no obvious periodicity, and the value fluctuates over the full range of 0%-100%. When the above conditions are met, it is determined that the operating condition of the carbon dioxide well is an abnormal liquid phase slippage condition. Among them, more gas is produced to form a gas lock, and the liquid phase slips. The pressure is stable at a high level, the temperature is stable at a low level, and the periodicity is not obvious (it can be distinguished from a gas slug). Due to the excessively high gas content, the water content meter is abnormal, which is manifested as exceeding the applicable operating conditions.

[0042] 5) Preferably, when the following conditions are met, the operating condition of the carbon dioxide intake and exhalation well is determined to be an abnormal freezing condition: the real-time pressure curve drops to 0; the temperature value shown by the real-time temperature curve is stable at the external environment temperature; and the real-time water content curve has no fluctuation.

[0043] For example, when the real-time pressure curve shows that the pressure drops to 0 (or close to 0), the real-time temperature curve shows that the temperature is stable at the external ambient temperature, and the real-time water content curve has almost no fluctuations. When the above conditions are met, the operating condition of the carbon dioxide injection well is determined to be an abnormal freezing condition. Among them, due to the low ambient temperature, ice occurs inside the upstream pipeline or the water content meter pipeline. The upstream ice causes the wellhead back pressure to be unable to be transmitted to the pressure sensor, and because the fluid does not flow, the temperature gradually approaches the ambient temperature.

[0044] Preferably, the operating condition monitoring method for carbon dioxide consumption wells also includes: determining that the multi-parameter water content meter is abnormal when the following conditions are met: the amplitude changes of the real-time pressure curve and the real-time temperature curve are within a preset range; and the decrease amplitude of the real-time water content curve exceeds a seventh preset threshold.

[0045] To illustrate with an example, when the real-time pressure curve and the real-time temperature curve show that the corresponding pressure and temperature are stable, for example, the amplitude change is within the preset range (for example, the fluctuation does not exceed 1%); the real-time water content curve shows that the water content is abnormal, with a sharp drop (for example, the drop exceeds the seventh preset threshold of 3%), and continuous low-level small fluctuations. When the above conditions are met, it is determined that the multi-parameter water content meter is abnormal, including: the water content meter probe is blocked by oil, and the blockage cannot be removed by heating the antenna itself. Among them, the probe is blocked by oil, and the microwave antenna is surrounded by a large volume of oil. During the microwave penetration process, the dielectric constant attenuates less, and the water content interpretation result is low.

[0046] Step S130: When the operating condition is an abnormal operating condition, abnormal operating condition information is sent.

[0047] When the operating condition determined by step S120 is an abnormal condition or the multi-parameter water content meter is abnormal, such as an abnormal condition of gas slug plugging, a large amount of gas outflow, liquid phase slippage, freezing, etc., the corresponding abnormal condition information can be sent to the display device, and an alarm can be used to prompt the staff to solve the abnormality as soon as possible.

[0048] Preferably, when the operating condition is an abnormal operating condition, guidance information for solving the abnormal operating condition may also be sent.

[0049] To illustrate by way of example, when it is determined that the abnormal operating condition is a large amount of gas outflow abnormal condition, abnormal operating condition guidance information can be sent, such as: checking the casing pressure. If the casing pressure is significantly higher than the oil pressure by 1-2 MPa, casing venting and pressure control are implemented to restore the dynamic liquid level; when it is determined that the abnormal operating condition is a liquid phase slippage abnormal condition, abnormal operating condition guidance information can be sent, such as: increasing the number of flushing and quick pumping to prevent the carbon dioxide injected into the well from being discharged too quickly; when it is determined that the abnormal operating condition is a freezing abnormal condition, abnormal operating condition guidance information can be sent, such as: heating with a heating belt without wrapping the pipeline, or injecting methanol to remove blockage; when the multi-parameter water content meter is abnormal, abnormal operating condition guidance information can be sent, such as: heating the probe or hot washing to remove blockage.

[0050] Accordingly, the embodiment of the present invention does not need to add any new equipment or algorithms, and only obtains data of corresponding multiple monitoring parameters through the multi-parameter water content meter configured in the carbon dioxide intake and puff well to determine the working condition of the carbon dioxide intake and puff well. It can realize the diagnosis and alarm of abnormal working conditions such as gas slug, continuous pumping and blowing, oil plugging, gas continuous phase, ice plugging, etc. that occur in the production stage of the carbon dioxide intake and puff well, and provide corresponding abnormal working condition processing measures.

[0051] An embodiment of the present invention also provides a control device for monitoring the operating conditions of a carbon dioxide intake and puffing well, the control device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the above-mentioned method for monitoring the operating conditions of a carbon dioxide intake and puffing well.

[0052] An embodiment of the present invention further provides a machine-readable storage medium, on which instructions are stored, and the instructions enable a machine to execute the above-mentioned method for monitoring the working condition of a carbon dioxide huff-and-puff well.

[0053] An embodiment of the present invention further provides a condition monitoring system for a carbon dioxide intake and puff well, the condition monitoring system for a carbon dioxide intake and puff well comprising the above-mentioned control device and a multi-parameter water content meter arranged at a preset position of each carbon dioxide intake and puff well.

[0054] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0055] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0056] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0057] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1The steps for the functions specified in one or more boxes.

[0058] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0059] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0060] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0061] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0062] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A method for monitoring the working condition of a carbon dioxide huff and puff well, characterized in that: The method for monitoring the working condition of a carbon dioxide huff-and-puff well comprises: The data of multiple monitoring parameters of CO2 huff-and-puff wells are obtained through a multi-parameter water content meter; Determine the operating condition of the carbon dioxide huff and puff well by using the data of the multiple monitoring parameters obtained; and When the operating condition is an abnormal operating condition, abnormal operating condition information is sent.

2. The method for monitoring the working condition of a carbon dioxide huff and puff well according to claim 1, characterized in that: The multiple monitoring parameters include the water content, temperature and pressure of the wellhead produced fluid of the carbon dioxide huff and puff well obtained by the multi-parameter water content meter.

3. The method for monitoring the working condition of a carbon dioxide huff and puff well according to claim 2, characterized in that: The method of determining the operating condition of the carbon dioxide huff and puff well by using the data of the multiple monitoring parameters obtained includes: According to the obtained water content, temperature and pressure of the wellhead output fluid of the carbon dioxide huff and puff well, draw the corresponding real-time water content curve, real-time temperature curve and real-time pressure curve; and Based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve, the operating condition of the carbon dioxide huff-and-puff well is determined.

4. The method for monitoring the working condition of a carbon dioxide huff-and-puff well according to claim 3, characterized in that: The determining of the operating condition of the carbon dioxide huff-and-puff well based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve includes: When the following conditions are met, the operating condition of the CO2 huff-and-puff well is determined to be normal: The real-time moisture content curve changes periodically, and the difference between the peak and the trough of the periodic change does not exceed a preset value; and The real-time temperature curve and the real-time pressure curve vary within a preset range.

5. The method for monitoring the working condition of a carbon dioxide huff and puff well according to claim 3, characterized in that: The determining of the operating condition of the carbon dioxide huff-and-puff well based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve includes: When the following conditions are met, the operating condition of the CO2 huff-and-puff well is determined to be an abnormal gas slug condition: The rising amplitude of the real-time moisture content curve exceeds a first preset threshold, the rising amplitude of the real-time pressure curve exceeds a second preset threshold, and the falling amplitude of the real-time temperature curve exceeds a third preset threshold; and After a preset time, the real-time moisture content curve, the real-time temperature curve and the real-time pressure curve change periodically.

6. The method for monitoring the working condition of a carbon dioxide huff-and-puff well according to claim 3, characterized in that: The determining of the operating condition of the carbon dioxide huff-and-puff well based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve includes: When the following conditions are met, the operating condition of the CO2 huff-and-puff well is determined to be an abnormal condition of large-volume gas output: The real-time moisture content curve changes periodically, and the frequency is greater than the first preset frequency, and the amplitude is greater than the first preset amplitude; The real-time pressure curve changes periodically, and the frequency is greater than the second preset frequency, and the amplitude is greater than the second preset amplitude; and The drop range of the real-time temperature curve exceeds a fourth preset threshold.

7. The method for monitoring the working condition of a carbon dioxide huff and puff well according to claim 3, characterized in that: The determining of the operating condition of the carbon dioxide huff-and-puff well based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve includes: When the following conditions are met, the operating condition of the CO2 huff-and-puff well is determined to be an abnormal liquid phase slip condition: The rising amplitude of the real-time pressure curve exceeds a fifth preset threshold and remains at the rising amplitude; The falling range of the real-time temperature curve exceeds a sixth preset threshold and remains at the falling range; and The real-time moisture content curve does not change periodically.

8. The method for monitoring the working condition of a carbon dioxide huff and puff well according to claim 3, characterized in that: The determining of the operating condition of the carbon dioxide huff-and-puff well based on the drawn real-time water content curve, real-time temperature curve and real-time pressure curve includes: When the following conditions are met, the operating condition of the CO2 huff and puff well is determined to be an abnormal freezing condition: The real-time pressure curve drops to 0; The temperature value shown in the real-time temperature curve is stabilized at the external environment temperature; and The real-time moisture content curve has no fluctuations.

9. The method for monitoring the working condition of a carbon dioxide huff and puff well according to claim 3, characterized in that: The method for monitoring the working condition of a carbon dioxide huff and puff well further comprises: When the following conditions are met, it is determined that the multi-parameter water content meter is abnormal: The amplitude changes of the real-time pressure curve and the real-time temperature curve are within a preset range; and The decrease range of the real-time moisture content curve exceeds a seventh preset threshold.

10. A control device for monitoring the working condition of a carbon dioxide huff-and-puff well, characterized in that: The control device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the computer program to implement the method for monitoring the operating conditions of a carbon dioxide huff-and-puff well according to any one of claims 1 to 9.

11. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions, which enable the machine to execute the working condition monitoring method for carbon dioxide huff-and-puff wells according to any one of claims 1-9.

12. A working condition monitoring system for a carbon dioxide huff and puff well, characterized in that: The operating condition monitoring system for carbon dioxide huff and puff wells comprises the control device according to claim 10 and a multi-parameter water content meter arranged at a preset position of each carbon dioxide huff and puff well.

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