CN111305812A

CN111305812A - Method and device for carrying out abnormity detection on coal-bed gas well and storage medium

Info

Publication number: CN111305812A
Application number: CN201811427786.XA
Authority: CN
Inventors: 于家盛; 胡秋嘉; 祁空军; 张聪; 贾慧敏; 崔新瑞; 毛崇昊; 刘昌平; 张光波; 李志斌
Original assignee: Petrochina Co Ltd
Current assignee: Petrochina Co Ltd
Priority date: 2018-11-27
Filing date: 2018-11-27
Publication date: 2020-06-19
Anticipated expiration: 2038-11-27
Also published as: CN111305812B

Abstract

The invention discloses a method and a device for carrying out abnormity detection on a coal-bed gas well and a storage medium, and belongs to the field of coal-bed gas development. According to the method, a plurality of parameter value lists of the target coal-bed gas well are obtained, the parameter value lists correspond to a plurality of production parameters one to one, then the parameter change characteristics of each production parameter in the production parameters are determined according to the parameter value lists, and the abnormal type of the target coal-bed gas well is determined according to the parameter change characteristics. That is, in the method and the device, the abnormal type of the coal-bed gas well is determined through the multiple parameter change characteristics, rather than the fact that whether the abnormal condition of the coal-bed gas well occurs is judged directly according to whether the parameter value corresponding to a certain production parameter of the coal-bed gas well is within the preset range, the abnormal condition of the coal-bed gas well can be accurately determined through the detection method provided by the embodiment of the invention, and the accuracy of the abnormal detection of the coal-bed gas well is improved.

Description

Method and device for carrying out abnormity detection on coal-bed gas well and storage medium

Technical Field

The invention relates to the field of coal bed gas development, in particular to a method and a device for carrying out abnormity detection on a coal bed gas well and a storage medium.

Background

Coal bed gas has been increasingly appreciated as an unconventional natural gas. If in the coal bed gas exploitation process, the coal bed gas well has problems, the exploitation efficiency of the coal bed gas well can be influenced, and therefore the abnormal condition of the coal bed gas well needs to be detected.

In the related art, in the production process of the coal-bed gas well, if a parameter value corresponding to a certain production parameter of the coal-bed gas well is not within a preset range, the occurrence of an abnormal condition of the coal-bed gas well is judged. The production parameters of the coal-bed gas well comprise daily gas production, daily water production, casing pressure and the like. For example, the current daily gas production rate of the coal-bed gas well is 400, and if the preset range exceeds 500, it can be determined that the coal-bed gas well has an abnormal condition.

When the method is used for detecting the abnormity of the coal bed gas well, only the coal bed gas well with obvious abnormal conditions can be detected, and the coal bed gas well with less obvious abnormal conditions can not be detected at all, so that the method has low accuracy in detecting the abnormity of the coal bed gas well.

Disclosure of Invention

The embodiment of the invention provides a method and a device for carrying out abnormity detection on a coal-bed gas well and a storage medium, which can improve the accuracy of abnormity detection on the coal-bed gas well. The technical scheme is as follows:

in a first aspect, a method for anomaly detection of a coal-bed gas well is provided, and the method comprises the following steps:

acquiring a plurality of parameter value lists of a target coal-bed gas well to be detected, wherein the parameter value lists correspond to a plurality of production parameters one to one, and each parameter value list comprises parameter values of the corresponding production parameters in each time interval included in a first time period;

determining a plurality of parameter change characteristics corresponding to the plurality of production parameters one to one according to each parameter value list in the plurality of parameter value lists, wherein each parameter change characteristic comprises a change trend and a change quantity, and the change trend comprises constant change or continuous change;

and carrying out abnormity detection on the target coal-bed gas well according to the parameter change characteristics.

Optionally, the performing anomaly detection on the target coal-bed gas well according to the plurality of parameter change characteristics includes:

when the variation trend of each parameter variation characteristic in the parameter variation characteristics is kept unchanged, determining the current variation of the coal void degree when the movement speed of the sucker rod of the target coal-bed gas well is increased, wherein the coal void degree refers to the distance from the liquid level in an annular space formed by a casing and an oil pipe of the target coal-bed gas well to the bottom of a coal bed, the oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well;

and if the current variation of the coal bed methane degree is smaller than a first reference value, determining that the target coal bed methane well is a first type abnormal coal bed methane well, wherein the first type abnormal coal bed methane well refers to a coal bed with sand buried in the coal bed methane well.

Optionally, configuring a corresponding reference condition for each of the plurality of production parameters, where the reference condition includes a reference variation trend and a variation threshold;

and according to the parameter change characteristics, carrying out abnormity detection on the target coal-bed gas well, wherein the abnormity detection comprises the following steps:

when the plurality of parameter change characteristics have the change trend that at least one parameter change characteristic changes continuously, determining at least one production parameter corresponding to the at least one parameter change characteristic one by one to obtain at least one alternative production parameter;

selecting the alternative production parameters meeting the corresponding reference conditions from the at least one alternative production parameter according to the parameter change characteristics of each alternative production parameter in the at least one alternative production parameter;

and determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions.

Optionally, the plurality of production parameters comprises daily gas production, daily water production, casing pressure, coal void fraction, and pipeline pressure;

determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions, wherein the determining comprises the following steps:

when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, daily water production and coal submergence, determining that the target coal-bed gas well is a second-type abnormal coal-bed gas well, wherein the second-type abnormal coal-bed gas well refers to an instrument for testing a working fluid level, and the working fluid level refers to the distance from a well mouth of the coal-bed gas well to the fluid level in an annular space formed by a casing and an oil pipe in the target coal-bed gas well;

when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production and daily water production, determining that the target coal-bed gas well is a third-type abnormal coal-bed gas well, wherein the third-type abnormal coal-bed gas well means that a migration channel of coal-bed gas in a coal bed in the coal-bed gas well is blocked by coal dust;

when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, determining that the target coal-bed gas well is a fourth type abnormal coal-bed gas well, wherein the fourth type abnormal coal-bed gas well refers to a sucker rod worn oil pipe in the coal-bed gas well;

when the candidate production parameters meeting the corresponding reference conditions comprise pipeline pressure, determining that the target coal-bed gas well is a fifth-type abnormal coal-bed gas well, wherein the fifth-type abnormal coal-bed gas well means that accumulated water exists in a gas pipeline of the coal-bed gas well or the gas pipeline is damaged;

and when the alternative production parameters meeting the corresponding reference conditions comprise casing pressure and daily gas production, determining that the target coal-bed gas well is a sixth-type abnormal coal-bed gas well, wherein the sixth-type abnormal coal-bed gas well means that a gas release valve at the wellhead of the coal-bed gas well has a problem.

Optionally, a reference variation trend in the reference condition configured for the daily gas production is a continuous decrease, and the variation threshold is a first reference value;

the reference change trend in the reference condition configured for the daily water yield is continuously reduced, and the change threshold is a second reference value;

the reference change trend in the reference condition configured for the coal shrinkage degree is continuously increased, and the variation threshold is a third reference value;

the reference change trend in the reference condition configured for the casing pressure is continuously rising, and the change threshold is a fourth reference value;

the reference trend of change in the reference condition configured for the line pressure is continuously rising or continuously falling, and the change amount threshold is a fifth reference value.

Optionally, after the anomaly detection is performed on the target coal-bed gas well according to the multiple parameter variation characteristics, the method further includes:

determining a treatment strategy aiming at the target coal-bed gas well according to the abnormal type of the target coal-bed gas well;

and displaying the treatment strategy so that a user can treat the target coal-bed gas well according to the treatment strategy.

In a second aspect, an apparatus for anomaly detection of a coal bed gas well is provided, the apparatus comprising:

the system comprises an acquisition module, a detection module and a processing module, wherein the acquisition module is used for acquiring a plurality of parameter value lists of a target coal-bed gas well to be detected, the parameter value lists correspond to a plurality of production parameters one to one, and each parameter value list comprises parameter values of the corresponding production parameters in each time interval included in a first time period;

the first determining module is used for determining a plurality of parameter change characteristics which correspond to the plurality of production parameters one by one according to each parameter value list in the plurality of parameter value lists, wherein each parameter change characteristic comprises a change trend and a change quantity, and the change trend comprises constant change or continuous change;

and the detection module is used for carrying out abnormity detection on the target coal-bed gas well according to the parameter change characteristics.

Optionally, the detection module includes:

a first determining unit, configured to determine, when a variation trend of each parameter variation feature in the plurality of parameter variation features is kept unchanged, a current variation of a submergence degree when a movement speed of a sucker rod of the target coal-bed gas well is increased, where the submergence degree is a distance from a liquid level in an annular space formed by a casing and an oil pipe of the target coal-bed gas well to a bottom of a coal bed, the oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well;

and the second determining unit is used for determining that the target coal-bed gas well is a first-type abnormal coal-bed gas well if the current variation of the coal submergence degree is smaller than a first reference value, wherein the first-type abnormal coal-bed gas well refers to a sand-buried coal bed in the coal-bed gas well.

the detection module comprises:

the third determining unit is used for determining at least one production parameter corresponding to at least one parameter change characteristic one to one when the change trend of at least one parameter change characteristic in the parameter change characteristics is continuous change, so as to obtain at least one alternative production parameter;

the selection unit is used for selecting the alternative production parameters meeting the corresponding reference conditions from the at least one alternative production parameter according to the parameter change characteristics of each alternative production parameter in the at least one alternative production parameter;

and the fourth determining unit is used for determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions.

the fourth determination unit includes:

the first determining subunit is used for determining that the target coal-bed gas well is a second-type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, daily water production and coal submergence, wherein the second-type abnormal coal-bed gas well refers to an instrument for testing a working fluid level, and the working fluid level refers to the distance from a wellhead of the coal-bed gas well to the fluid level in an annular space formed by a casing and an oil pipe in the target coal-bed gas well;

the second determining subunit is configured to determine that the target coal-bed gas well is a third-type abnormal coal-bed gas well when the candidate production parameters meeting the corresponding reference conditions include daily gas production and daily water production, where the third-type abnormal coal-bed gas well is a coal-bed gas well in which a migration channel of coal-bed gas in a coal bed is blocked by pulverized coal;

the third determining subunit is configured to determine that the target coal-bed gas well is a fourth-type abnormal coal-bed gas well when the candidate production parameter meeting the corresponding reference condition includes daily gas production, where the fourth-type abnormal coal-bed gas well refers to a sucker rod-worn oil pipe in the coal-bed gas well;

the fourth determining subunit is configured to determine that the target coal-bed gas well is a fifth-type abnormal coal-bed gas well when the candidate production parameter meeting the corresponding reference condition includes a pipeline pressure, where the fifth-type abnormal coal-bed gas well refers to a coal-bed gas well with accumulated water in a gas pipeline or a damaged gas pipeline;

and the fifth determining subunit is used for determining that the target coal-bed gas well is a sixth-type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise casing pressure and daily gas production rate, wherein the sixth-type abnormal coal-bed gas well refers to a gas release valve at a wellhead of the coal-bed gas well.

Optionally, the apparatus further comprises:

the second determination module is used for determining a treatment strategy aiming at the target coal-bed gas well according to the abnormal type of the target coal-bed gas well;

and the display module is used for displaying the treatment strategy so as to enable a user to treat the target coal-bed gas well according to the treatment strategy.

In a third aspect, an apparatus for anomaly detection of a coal bed gas well is provided, the apparatus comprising:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of any of the methods of the first aspect described above.

In a fourth aspect, a computer-readable storage medium has stored thereon instructions which, when executed by a processor, implement the steps of any of the methods of the first aspect described above.

In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the steps of any of the methods of the first aspect described above.

The technical scheme provided by the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, a plurality of parameter value lists of the target coal-bed gas well are obtained, the parameter value lists correspond to a plurality of production parameters one to one, and then the parameter change characteristics of each production parameter in the production parameters are determined according to the parameter value lists so as to determine the abnormal type of the target coal-bed gas well according to the parameter change characteristics. That is, in the method and the device, the abnormal type of the coal-bed gas well is determined through the multiple parameter change characteristics, rather than the fact that whether the abnormal condition of the coal-bed gas well occurs is judged directly according to whether the parameter value corresponding to a certain production parameter of the coal-bed gas well is within the preset range, the abnormal condition of the coal-bed gas well can be accurately determined through the detection method provided by the embodiment of the invention, and the accuracy of the abnormal detection of the coal-bed gas well is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic illustration of a coal bed gas well provided by an embodiment of the present invention;

FIG. 2 is a flow chart of a method for anomaly detection of a coal-bed gas well according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for anomaly detection of a coal-bed gas well according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a terminal according to an embodiment of the present invention.

Reference numerals:

1: a sucker rod; 2: a sleeve; 3: and (4) an oil pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Before explaining the method for detecting the abnormity of the coal-bed gas well provided by the embodiment of the invention, firstly, an explanation is made on the exploitation principle of the coal-bed gas well. The coalbed methane in the coalbed is mainly adsorbed on the surface of coal in the coalbed, so that the pressure in the coalbed is required to be reduced, the coalbed methane is desorbed from the surface of the coal and flows into a coalbed methane well through natural cracks in the coalbed, and then the coalbed methane is conveyed to a wellhead of the coalbed methane well through a device arranged in the coalbed methane well and conveyed to a gas collecting station through the device arranged at the wellhead of the coalbed methane well. The mining process of the coal bed gas can be summarized as follows: desorption, diffusion, seepage and output.

Currently, in the process of exploiting coal bed gas, as shown in fig. 1, a device arranged in a coal bed gas well may have a casing 2 and a tubing 3, the tubing 3 is located in the casing 2, and an annular space is formed between the casing 2 and the tubing 3. In addition, a sucker rod 1 is further arranged in the coal-bed gas well, and the sucker rod 1 is located in an oil pipe 3. During the coal bed gas exploitation process, the sucker rod 1 moves in the oil pipe 3. And the first end of sucker rod 1 is connected with the walking beam on the beam-pumping unit, and the second end of sucker rod 1 is connected with the pump at the bottom of coal bed gas well. In addition, the device at the wellhead of the coal bed gas well can be a gas transmission pipeline.

Because coal seams generally contain formation water, during the process of exploiting coal bed gas, the formation water in the coal seams flows into the coal bed gas well, and a certain amount of formation water exists in an annular space in the coal bed gas well. Formation water in the annulus is drained from the tubing 3 and formation water in the coal seam enters the annulus as formation water in the annulus diminishes. When the formation water in the coal bed is reduced, the pressure of the coal bed is reduced, and the coal bed gas can be desorbed, so that the yield of the coal bed gas well can be improved. Wherein, the formation water is discharged from the oil pipe 3 mainly by the sucker rod 1 and the pump in the oil pipe 3. The pump pumps the formation water in the annular space to the bottom of the oil pipe 3, and the sucker rod 1 moves up and down to pump the formation water out of the oil pipe 3.

In addition, when the coal bed gas flow in the annular space flows to a wellhead of the coal bed gas well and is conveyed to the gas collecting station through a gas transmission pipeline of the wellhead of the coal bed gas well, the pressure in the annular space is reduced, so that the pressure in the coal bed is reduced, the desorption of the coal bed gas adsorbed on the surface of coal is promoted, and the yield of the coal bed gas well can be improved.

Fig. 2 is a flowchart of a method for detecting an anomaly in a coal-bed gas well according to an embodiment of the present invention, and as shown in fig. 2, the method includes the following steps:

step 201: the method comprises the steps of obtaining a plurality of parameter value lists of a target coal-bed gas well to be detected, wherein the parameter value lists correspond to a plurality of production parameters one to one, and each parameter value list comprises parameter values of the corresponding production parameters in each time interval included in a first time period.

In the production process of the target coal-bed gas well, a measuring instrument for measuring each of a plurality of production parameters is arranged in the target coal-bed gas well, for any one of the plurality of production parameters, a parameter value is measured in real time by the measuring instrument corresponding to the production parameter, and the measurement result of the production parameter is recorded. Therefore, in a possible implementation manner, the obtaining of the list of the plurality of parameter values of the target coal-bed gas well to be detected may be: and for any one of the production parameters, directly obtaining a plurality of parameter value lists of the target coal-bed gas well to be detected from the measurement results of the measuring instrument corresponding to the production parameter.

Wherein the production parameters may include: daily gas production, daily water production, casing pressure, coal void fraction, and pipeline pressure. Wherein, the pipeline pressure refers to the pressure of the gas pipeline.

The coal submergence degree refers to the distance from the liquid level in an annular space formed by a casing and an oil pipe of a target coal-bed gas well to the bottom of a coal bed. The oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well. In particular, the coal shrinkage can be calculated from measurements made by a test instrument disposed in the annular space. Because the distance from the coal bed gas wellhead to the coal bed bottom is constant, the testing instrument in the annular space is used for testing the distance from the liquid level of the formation water in the annular space to the coal bed gas wellhead, and the numerical value obtained by subtracting the monitoring result of the testing instrument from the distance from the coal bed gas wellhead to the coal bed bottom is the coal submergence.

For example, as shown in FIG. 1, if the distance from the wellhead of the coal-bed gas well to the bottom of the coal bed is L, and the distance from the liquid level of the formation water in the annular space to the wellhead of the coal-bed gas well is L1, the coal submergence is L-L1.

In addition, each parameter value list comprises parameter values of the corresponding production parameter over respective time intervals comprised in the first time period. The first time period may be 10 days, 20 days, and the like, and the embodiment of the present invention is not limited herein.

For example, the first time period is 10 days, and table 1 is a list of parameter values measured by a measuring instrument for daily gas production in a plurality of production parameters provided in the embodiment of the present invention. The parameter value list shown in table 1 includes parameter values for daily gas production for each day of 10 days. Specifically, on day 1, the parameter value of the daily gas production was 400. On day 2, the parameter value for daily gas production was 403. On day 10, the parameter value for daily gas production was 420.

TABLE 1

Step 202: according to each parameter value list in the parameter value lists, a plurality of parameter change characteristics which correspond to the production parameters in a one-to-one mode are determined, each parameter change characteristic comprises a change trend and a change quantity, and the change trend comprises constant or continuous change. Wherein the continuous change comprises a continuous rise or a continuous fall.

The implementation manner of determining the multiple parameter change characteristics corresponding to the multiple production parameters one to one according to each parameter value list in the multiple parameter value lists may be: and for any parameter value list in the parameter value lists, performing linear fitting on the parameter values in the parameter value list, obtaining a straight line after the linear fitting, and determining the slope of the straight line. When the absolute value of the slope of the straight line is less than or equal to the preset threshold, the change trend of the parameter change characteristic of the production parameter is kept unchanged. When the slope of the straight line is a positive value and is greater than a preset threshold value, the change trend of the parameter change characteristic of the production parameter is shown to be continuously rising. When the slope of the straight line is a negative value and is smaller than the negative value of the preset threshold value, the change trend of the parameter change characteristic of the production parameter is shown to be continuously reduced. In addition, the fitted straight line has two end points, and the parameter value corresponding to the first end point is subtracted from the parameter value corresponding to the second end point, so that the variation of the parameter variation characteristic of the production parameter is obtained. And the corresponding parameter value of the second endpoint is greater than or equal to the corresponding parameter value of the first endpoint.

For example, table 2 provides a list of values for a parameter of casing pressure in accordance with an embodiment of the present invention. As shown in table 2, the value of the parameter for the casing pressure at day 1 was 2. On day 2, the value of the parameter for the casing pressure was 2.3. On day 3, the value of the parameter for the casing pressure was 2.35. On day 4, the value of the parameter for the casing pressure was 2.4. On day 5, the value of the parameter for the casing pressure was 2.42. On day 6, the value of the parameter for the casing pressure was 2.49. On day 7, the value of the parameter for the casing pressure was 2.56. On day 8, the value of the parameter for the casing pressure was 2.63. On day 9, the value of the parameter for the casing pressure was 2.71. On day 10, the value of the parameter for the casing pressure was 2.8. And performing linear fitting on the parameter values, wherein the slope of the straight line after fitting is a positive value and is greater than a preset threshold value, and the change trend of the parameter change characteristic of the casing pressure is continuously increased. And the corresponding parameter value of the second end point of the fitted straight line is 2.8, the corresponding parameter value of the second end point is 2, and the variation of the parameter variation characteristic of the casing pressure is determined to be 0.8.

TABLE 2

Step 203: and carrying out abnormity detection on the target coal-bed gas well according to the plurality of parameter change characteristics.

According to the change characteristics of a plurality of parameters, the following two implementation modes can be provided for carrying out abnormity detection on the target coal-bed gas well:

(1) when the variation trend of each parameter variation characteristic in the multiple parameter variation characteristics is kept unchanged, determining the current variation of the coal void degree when the movement speed of a sucker rod of the target coal-bed gas well is increased, and if the current variation of the coal void degree is smaller than a first reference value, determining that the target coal-bed gas well is a first-type abnormal coal-bed gas well, wherein the first-type abnormal coal-bed gas well refers to a coal-bed buried layer in the coal-bed gas well. The first reference value may be 0 meter, 0.1 meter, 0.2 meter, and the like, and the embodiment of the present invention is not limited herein.

Before the movement speed of a sucker rod of a target coal-bed gas well is not increased, a numerical value of the coal submergence degree is obtained according to the monitoring result of a monitoring instrument in the annular space, and the numerical value is used as a first coal submergence degree. And after the movement speed of the sucker rod of the target coal-bed gas well is increased, obtaining another coal submergence value according to the monitoring result of the monitoring instrument in the annular space, and taking the value as a second coal submergence. And determining the current variation of the coal void degree when the movement speed of the sucker rod of the target coal-bed gas well is increased according to the difference value of the first coal void degree and the second coal void degree. Wherein, increasing the movement speed of the sucker rod of the target coal-bed gas well is also called lifting system.

In addition, the sand-buried coal seam refers to that when a crack in the coal seam is enlarged through hydraulic fracturing so that coal bed gas in the coal seam flows into a coal bed gas well from the pressed crack, sand in fracturing fluid is accumulated in the coal bed gas well, and the height of the accumulated sand in the fracturing fluid exceeds the thickness of the coal bed, so that the sand blocks the coal bed gas in the coal bed to flow into the coal bed gas well, and the coal bed gas cannot be smoothly produced.

(2) And configuring corresponding reference conditions for each production parameter in the plurality of production parameters, wherein the reference conditions comprise reference change trends and change quantity thresholds. At this time, according to the multiple parameter change characteristics, the specific step of performing anomaly detection on the target coal-bed gas well may be: when the plurality of parameter change characteristics have the change trend that at least one parameter change characteristic changes continuously, at least one production parameter corresponding to the at least one parameter change characteristic in a one-to-one mode is determined, and at least one alternative production parameter is obtained. And selecting the alternative production parameters meeting the corresponding reference conditions from the at least one alternative production parameter according to the parameter change characteristics of each alternative production parameter in the at least one alternative production parameter. And determining the abnormal type of the target coal-bed gas well according to the alternative production parameters meeting the corresponding reference conditions. Wherein at least one means one or more.

When the variation trend of at least one parameter variation characteristic of the plurality of parameter variation characteristics is continuous variation, at least one production parameter corresponding to the at least one parameter variation characteristic one to one is determined, and the implementation mode for obtaining at least one alternative production parameter may be: and judging the change trend of any parameter change characteristic in the parameter change characteristics. And when the variation trend of the parameter variation characteristic is judged to be kept unchanged, the production parameter corresponding to the parameter variation characteristic is not determined as the alternative production parameter. And when the variation trend of the parameter variation characteristic is judged to be continuous variation, determining the production parameter corresponding to the parameter variation characteristic as an alternative production parameter.

In addition, according to the parameter variation characteristic of each alternative production parameter in the at least one alternative production parameter, the implementation manner of selecting the alternative production parameter satisfying the corresponding reference condition from the at least one alternative production parameter is as follows: and for any one of at least one alternative production parameter, comparing the parameter variation characteristic of the alternative production parameter with the reference condition of the alternative production parameter, and determining the alternative production parameter as the alternative production parameter meeting the reference condition when the variation trend in the parameter variation characteristic of the alternative production parameter is the same as the reference variation trend in the reference condition and the variation of the parameter variation characteristic of the alternative production parameter is greater than or equal to the variation threshold value in the reference condition.

Wherein the reference condition corresponding to each of the plurality of production parameters may be: (1) the reference change trend in the reference condition configured for the daily gas production amount is continuously reduced, and the change threshold is a first reference value. (2) The reference change trend in the reference condition configured for the daily water yield is a continuous decrease, and the change threshold is a second reference value. (3) The reference change trend in the reference condition configured for the coal shrinkage degree is continuously rising, and the change threshold is a third reference value. (4) The reference change trend in the reference condition configured for casing pressure is continuously rising, and the change threshold is a fourth reference value. (5) The reference trend of change in the reference condition configured for the line pressure is continuously rising or continuously falling, and the change amount threshold is a fifth reference value.

For example, the reference conditions for daily gas production are: the trend of the change within 10 days was a continuous decrease by an amount of 50 squares, i.e., the first reference value was 50 squares. The reference conditions of the daily water yield are as follows: the trend of the change within 10 days was a continuous decrease by 5% of the daily water production on day 1 within 10 days, i.e. the second reference value was 5% of the daily water production on day 1 within 10 days. The reference conditions of the coal shrinkage are as follows: the trend of the change within 10 days is a continuous increase or a continuous decrease, the amount of the continuous increase or the continuous decrease is 5 meters, i.e. the third reference value is 5 meters. The reference conditions for the casing pressure were: the trend of the change within 10 days was a continuous increase by an amount of 0.1MPa, i.e., the fourth reference value was 0.1 MPa. The reference conditions for the line pressure are: the trend of the change within 10 days is continuously increasing or continuously decreasing, the continuously increasing amount or the continuously decreasing amount is 0.01MPa, namely the fifth reference value is 0.01 MPa.

In addition, according to the alternative production parameters meeting the corresponding reference conditions, the following 5 conditions can be provided for determining the abnormal type of the target coal-bed gas well:

and a condition a, when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production rate, daily water production rate and coal submergence, determining that the target coal-bed gas well is a second-type abnormal coal-bed gas well, wherein the second-type abnormal coal-bed gas well refers to that an instrument for testing the working fluid level is abnormal, and the working fluid level refers to the distance from a well mouth of the coal-bed gas well to the liquid level in an annular space formed by a casing and an oil pipe in the target coal-bed gas well.

The instrument for testing the working fluid level is abnormal, and the result is that the measurement of the working fluid level of the formation water in the annular space in the coal-bed gas well is inaccurate, for example, the working fluid level in the annular space is already increased, but the value displayed by the instrument for testing the working fluid level is still the value of the working fluid level which is not increased. In practice, the working fluid level is already increased, and the working fluid level measured by an instrument for testing the working fluid level is still a value that the working fluid level is not increased, so that when the stratum water in the annular space is pumped out through the movement of the sucker rod to improve the yield of the target coal-bed gas well, the quantity of the stratum water in the annular space to be pumped out is determined according to the value measured by the testing instrument, and due to the inaccuracy of the measurement of the testing instrument, the pumped water quantity is inaccurate, so that the pressure change in the annular space is influenced, and the yield of the target coal-bed gas well is further influenced.

And b, when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production and daily water production, determining that the target coal-bed gas well is a third-type abnormal coal-bed gas well, wherein the third-type abnormal coal-bed gas well means that a migration channel of the coal-bed gas in the coal bed gas well is blocked by the pulverized coal.

The coal bed gas in the coal bed generally flows into the coal bed gas well through the crack in the coal bed, coal dust in the coal bed can be driven to move in the flowing process in the crack of the coal bed gas coal bed, the coal dust is suspended in the crack of the coal bed, and after the suspended coal dust is settled and gathered, the crack in the coal bed can be blocked, so that the coal bed gas is prevented from flowing into the target coal bed gas well from the crack in the coal bed.

And c, when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, determining that the target coal-bed gas well is a fourth type abnormal coal-bed gas well, wherein the fourth type abnormal coal-bed gas well refers to a sucker rod in the coal-bed gas well with an oil pipe abraded.

The coal-bed gas well is not a straight well but has a certain inclination, but the sucker rod in the coal-bed gas well is vertical. At the coal bed gas wellhead, the device of packing connects the sucker rod with the oil pipe. Because the sucker rod is vertical, the oil pipe is inclined along with the inclination of the coal-bed gas well in the coal-bed gas well, so that the sucker rod can abrade the oil pipe during the movement process. The oil pipe may be worn at the coal-bed gas well mouth, and the oil pipe may also be worn in the coal-bed gas well, when the oil pipe is worn through, the coal-bed gas in the annular space flows into the oil pipe through the worn-through part of the oil pipe, and is discharged along with formation water in the oil pipe, so that the coal-bed gas which should flow from the annular space is reduced, and the yield of the target coal-bed gas well is reduced.

And d, when the alternative production parameters meeting the corresponding reference conditions comprise pipeline pressure, determining that the target coal-bed gas well is a fifth-type abnormal coal-bed gas well, wherein the fifth-type abnormal coal-bed gas well means that accumulated water exists in a gas pipeline of the coal-bed gas well or the gas pipeline is damaged.

The gas transmission pipeline of the coal bed gas well is arranged at the wellhead of the coal bed gas well and is specially used for transmitting the coal bed gas produced from the coal bed gas well. Because the coal bed gas flows into the gas transmission pipeline from the annular space, and stratum water exists in the annular space, the coal bed gas entering the gas transmission pipeline can carry water vapor. When coal bed gas moves in the gas transmission pipeline, water vapor carried in the coal bed gas begins to condense when meeting the part with lower temperature and is attached to the gas transmission pipeline. When the water amount in the gas transmission pipeline is increased, the migration of the coal bed gas can be blocked.

The damaged gas transmission pipeline refers to a leakage point in the gas transmission pipeline, and the coal bed gas in the gas transmission pipeline can overflow from the leakage point in the gas transmission pipeline to the outside of the gas transmission pipeline.

And e, when the alternative production parameters meeting the corresponding reference conditions comprise casing pressure and daily gas production, determining that the target coal-bed gas well is a sixth-type abnormal coal-bed gas well, wherein the sixth-type abnormal coal-bed gas well means that a gas release valve at the wellhead of the coal-bed gas well has a problem.

Wherein, the well head department of coal bed gas well can distribute the gas valve, discharges the coal bed gas in the annular space in the coal bed gas well through gassing. Through the gas release valve, the speed of the coal bed gas in the annular space flowing into the gas transmission pipeline from the annular space can be controlled, so that the pressure in the annular space can be controlled, and the yield of the coal bed gas well can be adjusted. When problems occur in the air release valve, the pressure in the annular space cannot be accurately controlled, and therefore the yield of the coal bed gas well is influenced.

In the embodiment of the invention, the first type of abnormal coal-bed gas well can be represented by a coal-bed gas well HP-X, the second type of coal-bed gas well can be represented by a coal-bed gas well HP-Y, the third type of coal-bed gas well can be represented by a coal-bed gas well HP-Z, the fourth type of coal-bed gas well can be represented by a coal-bed gas well ZZ-X, the fifth type of coal-bed gas well can be represented by a coal-bed gas well ZZ-Y, and the sixth type of coal-bed gas well can be represented by a coal-bed gas.

It should be noted that the coal-bed gas wells determined as the first-type abnormal coal-bed gas well, the second-type abnormal coal-bed gas well, the third-type abnormal coal-bed gas well, the fourth-type abnormal coal-bed gas well, the fifth-type abnormal coal-bed gas well and the sixth-type abnormal coal-bed gas well may be determined according to a corresponding relationship between a plurality of parameter change characteristics of the coal-bed gas well and the abnormal types of the coal-bed gas wells. The corresponding relation between the parameter change characteristics of the coal-bed gas well and the abnormal type of the coal-bed gas well is set by an operator according to experience in advance.

For example, table 3 shows a corresponding relationship between a plurality of parameter variation characteristics of a coal-bed gas well and an anomaly type of the coal-bed gas well, which is provided by the embodiment of the present invention. As shown in table 3, when the variation trend of each of the plurality of parameters is unchanged and the current variation amount of the movement speed of the sucker rod is smaller than the first reference value, the abnormal type of the correspondingly set coal-bed gas well is the first-type abnormal coal-bed gas well. And when the daily gas yield, the daily water yield and the coal void degree meet the reference conditions and other production parameters are unchanged, the abnormal type of the correspondingly set coal-bed gas well is the second type abnormal coal-bed gas well. And when the daily gas yield and the daily water yield meet the reference conditions and other production parameters are unchanged, the abnormal type of the correspondingly set coal-bed gas well is a third-type abnormal coal-bed gas well. And when the daily gas production rate meets the reference condition and other production parameters are unchanged, the abnormal type of the correspondingly set coal-bed gas well is the fourth type abnormal coal-bed gas well. And when the pipeline pressure meets the reference condition and other production parameters are unchanged, the abnormal type of the correspondingly set coal-bed gas well is the fifth type abnormal coal-bed gas well. And when the casing pressure and the daily gas production meet the reference conditions and other production parameters are unchanged, the abnormal type of the correspondingly set coal-bed gas well is a sixth type abnormal coal-bed gas well.

TABLE 3

For example, as shown in table 4, when the variation trend of each of the plurality of parameters is unchanged and the current variation of the movement speed of the sucker rod is smaller than 0.1 meter, the abnormal type of the coal-bed gas well is the first type abnormal coal-bed gas well. When the daily gas production rate is in a continuous decline trend within 10 days, the decline amount exceeds 50 square, the change trend of the daily water yield within 10 days is in a continuous decline trend, the decline amount exceeds 5 percent of the daily water yield of the 1 st day within 10 days, the change trend of the coal shrinkage degree within 10 days is in a continuous rising or continuous decline trend, the continuous rising or continuous decline amount exceeds 5 meters, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is the second type abnormal coal-bed gas well. And when the daily gas production rate is in a continuous decrease trend within 10 days, the decrease amount exceeds 50 square, the change trend of the daily water yield within 10 days is in a continuous decrease trend, the decrease amount exceeds 5 percent of the daily water yield of the 1 st day within 10 days, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is a third-type abnormal coal-bed gas well. And when the daily gas production rate is in a continuous reduction trend within 10 days, the reduction amount exceeds 50 square, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is a fourth type abnormal coal-bed gas well. And when the change trend of the pipeline pressure in 10 days is continuous rising or continuous falling, the continuous rising amount or the continuous falling amount exceeds 0.01MPa, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is a fifth type abnormal coal-bed gas well. When the change trend of the casing pressure in 10 days is continuously increased, the increase amount exceeds 0.1MPa, the change trend of the daily gas production amount in 10 days is continuously decreased, the decrease amount exceeds 50 square, and other production parameters are unchanged, the abnormal type of the coal-bed gas well is a sixth type abnormal coal-bed gas well.

TABLE 4

In addition, according to the multiple parameter change characteristics, after the abnormality detection is performed on the target coal-bed gas well, the following steps can be further performed: and determining a treatment strategy aiming at the target coal-bed gas well according to the abnormal type of the target coal-bed gas well. And displaying the treatment strategy so that the user can treat the target coal-bed gas well according to the treatment strategy.

The implementation manner of determining the treatment strategy for the target coal-bed gas well according to the abnormal type of the target coal-bed gas well can be as follows: and storing the corresponding relation between the abnormal type of the target type coal-bed gas well and the treatment strategy of the target coal-bed gas well in advance, and searching the treatment strategy corresponding to the abnormal type of the target coal-bed gas well from the corresponding relation.

For example, table 5 shows a correspondence relationship between an abnormal type of a target type of a coal-bed gas well and a governing strategy of the target coal-bed gas well, which is provided by the embodiment of the present invention. As shown in table 5, when the abnormal type of the target coal-bed gas is the first-type abnormal coal-bed gas well, the corresponding treatment measures are pump detection and sand bailing. And when the abnormal type of the target coal-bed gas well is the second type abnormal coal-bed gas well, replacing the test instrument according to the corresponding treatment measure. And when the abnormal type of the target coal-bed gas well is the third type abnormal coal-bed gas well, the corresponding treatment measures are to slow down the air release amplitude, and fracture and block removal. And when the abnormal type of the target coal-bed gas well is the fourth type abnormal coal-bed gas well, the corresponding treatment measure is to replace an oil pipe. When the abnormal type of the target coal-bed gas well is the fifth type abnormal coal-bed gas well, the corresponding treatment measures are to discharge accumulated water of the gas transmission pipeline or check whether the gas transmission pipeline has a leakage point and treat the leakage point. And when the abnormal type of the target coal-bed gas well is the sixth type abnormal coal-bed gas well, the corresponding treatment measure is to replace the gas release valve.

TABLE 5

Wherein, pump inspection refers to the replacement of a pump in an oil pipe. The bailing means that sand in the coal-bed gas well is salvaged by a bailing tool. The air release slowing amplitude means that the coal bed gas in the annular space is released slowly through an air release valve at the wellhead of the coal bed gas well. Verifying the data of the meniscus in the annular space refers to re-measuring the meniscus in the annular space. Fracturing and unblocking refers to fracturing a coal seam by injecting fracturing fluid into the coal seam so as to form cracks in the coal seam. The accumulated water in the discharge pipeline is released through a special water discharge valve on the gas pipeline. The adjustment of the frequency of releasing the coal bed gas in the coal bed gas well means that the release times of releasing the coal bed gas in the coal bed gas well are adjusted by adjusting the opening and closing times of a gas release valve.

In practice, when the detection method provided by the embodiment of the invention is applied, the abnormal type of the coal-bed gas well can be determined according to the change characteristics of a plurality of production parameters of the target coal-bed gas well, and then the treatment measures can be further determined. The detection efficiency of the coal bed gas well can be greatly improved, and the yield of the coal bed gas well can be further improved.

Further, in order to verify the detection method provided by the implementation of the invention, when the detection method is applied on site, according to the multiple parameter change characteristics of a certain coal-bed gas well, the abnormal type of the coal-bed gas is determined to be the sixth type abnormal coal-bed gas well, namely, a problem occurs on a gas release valve. And the found corresponding treatment strategy is to replace the air release valve. After the gas release valve is replaced according to the governing strategy, the daily gas production of the coal-bed gas well is increased by 1384, the detection method provided by the embodiment of the invention is verified, and the governing strategy provided by the embodiment of the invention is verified.

For another example, according to the multiple parameter change characteristics of a certain coal-bed gas well, the abnormal type of the coal-bed gas is determined to be a fourth type abnormal coal-bed gas well, namely the sucker rod in the coal-bed gas well wears the oil pipe. And finding out the corresponding treatment strategy as replacing the oil pipe. After the oil pipe is replaced according to the treatment strategy, the daily gas production of the coal-bed gas well is increased by 100, the detection method provided by the embodiment of the invention is verified, and the treatment strategy provided by the embodiment of the invention is verified.

Fig. 3 is a schematic diagram of an apparatus for detecting an abnormality of a coal-bed gas well according to an embodiment of the present invention, and as shown in fig. 3, the apparatus 300 includes:

the acquiring module 301 is configured to acquire a plurality of parameter value lists of a target coal-bed gas well to be detected, where the parameter value lists correspond to a plurality of production parameters one to one, and each parameter value list includes parameter values of the corresponding production parameters in each time interval included in a first time period;

a first determining module 302, configured to determine, according to each parameter value list in the parameter value lists, a plurality of parameter change characteristics corresponding to the plurality of production parameters one to one, where each parameter change characteristic includes a change trend and a change amount, and the change trend includes a constant change or a continuous change;

and the detection module 303 is configured to perform anomaly detection on the target coal-bed gas well according to the multiple parameter change characteristics.

Optionally, the detection module 303 includes:

the first determining unit is used for determining the current variation of the coal void degree when the movement speed of a sucker rod of a target coal-bed gas well is increased when the variation trend of each parameter variation characteristic in the parameter variation characteristics is kept unchanged, wherein the coal void degree refers to the distance from the liquid level in an annular space formed by a casing and an oil pipe of the target coal-bed gas well to the bottom of a coal bed, the oil pipe is used for outputting water in the target coal-bed gas well, and the annular space is used for outputting coal-bed gas in the target coal-bed gas well;

and the second determining unit is used for determining that the target coal-bed gas well is a first-type abnormal coal-bed gas well if the current variation of the coal submergence degree is smaller than the first reference value, wherein the first-type abnormal coal-bed gas well refers to a sand-buried coal bed in the coal-bed gas well.

the detection module 303 includes:

the third determining unit is used for determining at least one production parameter corresponding to at least one parameter change characteristic one to one when the change trend of at least one parameter change characteristic in the plurality of parameter change characteristics is continuous change, so as to obtain at least one alternative production parameter;

the fourth determination unit includes:

the first determining subunit is used for determining that the target coal-bed gas well is a second-type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, daily water production and coal submergence, wherein the second-type abnormal coal-bed gas well refers to an instrument for testing the working fluid level, and the working fluid level refers to the distance from the well mouth of the coal-bed gas well to the fluid level in an annular space formed by a casing and an oil pipe in the target coal-bed gas well;

the second determining subunit is used for determining that the target coal-bed gas well is a third-type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production and daily water production, wherein the third-type abnormal coal-bed gas well means that a migration channel of the coal-bed gas in the coal bed gas well is blocked by coal dust;

the third determining subunit is used for determining that the target coal-bed gas well is a fourth-type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise daily gas production, wherein the fourth-type abnormal coal-bed gas well refers to a sucker rod worn oil pipe in the coal-bed gas well;

the fourth determining subunit is used for determining that the target coal-bed gas well is a fifth-type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise pipeline pressure, wherein the fifth-type abnormal coal-bed gas well means that accumulated water exists in a gas pipeline of the coal-bed gas well or the gas pipeline is damaged;

and the fifth determining subunit is used for determining that the target coal-bed gas well is a sixth-type abnormal coal-bed gas well when the alternative production parameters meeting the corresponding reference conditions comprise casing pressure and daily gas production rate, wherein the sixth-type abnormal coal-bed gas well means that a gas release valve at the wellhead of the coal-bed gas well has a problem.

Optionally, the reference change trend in the reference condition configured for the daily gas production amount is continuously reduced, and the change threshold is a first reference value;

the reference change trend in the reference condition configured for the coal shrinkage degree is continuously increased, and the change threshold is a third reference value;

Optionally, the apparatus 300 further comprises:

It should be noted that: when the device for detecting the abnormality of the coal-bed gas well provided by the embodiment is used for detecting the abnormality of the coal-bed gas well, the division of the functional modules is only used for illustration, and in practical application, the function distribution can be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules so as to complete all or part of the functions described above. In addition, the device for performing anomaly detection on the coal-bed gas well provided by the embodiment and the method embodiment for performing anomaly detection on the coal-bed gas well belong to the same concept, and the specific implementation process is detailed in the method embodiment and is not described herein again.

Fig. 4 shows a block diagram of a terminal 400 according to an exemplary embodiment of the present invention. The terminal 400 may be: a smart phone, a tablet computer, an MP3 player (Moving Picture Experts Group Audio Layer III, motion video Experts compression standard Audio Layer 3), an MP4 player (Moving Picture Experts Group Audio Layer iv, motion video Experts compression standard Audio Layer 4), a notebook computer, or a desktop computer. The terminal 400 may also be referred to by other names such as user equipment, portable terminal, laptop terminal, desktop terminal, etc.

Generally, the terminal 400 includes: a processor 401 and a memory 402.

Processor 401 may include one or more processing cores, such as a 4-core processor, an 8-core processor, or the like. The processor 401 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 401 may also include a main processor and a coprocessor, where the main processor is a processor for processing data in an awake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 401 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed by the display screen. In some embodiments, the processor 401 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 402 may include one or more computer-readable storage media, which may be non-transitory. Memory 402 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 402 is configured to store at least one instruction for execution by processor 401 to implement the method for anomaly detection of coal bed methane provided by the method embodiments of the present invention.

In some embodiments, the terminal 400 may further optionally include: a peripheral interface 403 and at least one peripheral. The processor 401, memory 402 and peripheral interface 403 may be connected by bus or signal lines. Each peripheral may be connected to the peripheral interface 403 via a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of a radio frequency circuit 404, a touch screen display 405, a camera assembly 406, an audio circuit 407, a positioning assembly 408, and a power supply 409.

The peripheral interface 403 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 401 and the memory 402. In some embodiments, processor 401, memory 402, and peripheral interface 403 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 401, the memory 402 and the peripheral interface 403 may be implemented on a separate chip or circuit board, which is not limited by this embodiment.

The Radio Frequency circuit 404 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 404 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 404 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 404 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 404 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: metropolitan area networks, various generation mobile communication networks (2G, 3G, 4G, and 5G), Wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 404 may further include NFC (Near Field Communication) related circuits, which are not limited in the present invention.

The display screen 405 is used to display a UI (user interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display screen 405 is a touch display screen, the display screen 405 also has the ability to capture touch signals on or over the surface of the display screen 405. The touch signal may be input to the processor 401 as a control signal for processing. At this point, the display screen 405 may also be used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the display screen 405 may be one, providing the front panel of the terminal 400; in other embodiments, the display screen 405 may be at least two, respectively disposed on different surfaces of the terminal 400 or in a folded design; in still other embodiments, the display 405 may be a flexible display disposed on a curved surface or a folded surface of the terminal 400. Even further, the display screen 405 may be arranged in a non-rectangular irregular pattern, i.e. a shaped screen. The Display screen 405 may be made of LCD (liquid crystal Display), OLED (Organic Light-Emitting Diode), and the like.

The camera assembly 406 is used to capture images or video. Optionally, camera assembly 406 includes a front camera and a rear camera. Generally, a front camera is disposed at a front panel of the terminal, and a rear camera is disposed at a rear surface of the terminal. In some embodiments, the number of the rear cameras is at least two, and each of the rear cameras is any one of a main camera, a depth-of-field camera, a wide-angle camera and a telephoto camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize panoramic shooting and VR (virtual reality) shooting functions or other fusion shooting functions. In some embodiments, camera assembly 406 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

The audio circuit 407 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 401 for processing, or inputting the electric signals to the radio frequency circuit 404 for realizing voice communication. For the purpose of stereo sound collection or noise reduction, a plurality of microphones may be provided at different portions of the terminal 400. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 401 or the radio frequency circuit 404 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 407 may also include a headphone jack.

The positioning component 408 is used to locate the current geographic position of the terminal 400 for navigation or LBS (location based Service). The positioning component 408 may be a positioning component based on the GPS (global positioning System) of the united states, the beidou System of china, the graves System of russia, or the galileo System of the european union.

The power supply 409 is used to supply power to the various components in the terminal 400. The power source 409 may be alternating current, direct current, disposable or rechargeable. When power source 409 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.

In some embodiments, the terminal 400 also includes one or more sensors 410. The one or more sensors 410 include, but are not limited to: acceleration sensor 411, gyro sensor 412, pressure sensor 413, fingerprint sensor 414, optical sensor 415, and proximity sensor 416.

The acceleration sensor 411 may detect the magnitude of acceleration in three coordinate axes of the coordinate system established with the terminal 400. For example, the acceleration sensor 411 may be used to detect components of the gravitational acceleration in three coordinate axes. The processor 401 may control the touch display screen 405 to display the user interface in a landscape view or a portrait view according to the gravitational acceleration signal collected by the acceleration sensor 411. The acceleration sensor 411 may also be used for acquisition of motion data of a game or a user.

The gyro sensor 412 may detect a body direction and a rotation angle of the terminal 400, and the gyro sensor 412 may cooperate with the acceleration sensor 411 to acquire a 3D motion of the terminal 400 by the user. From the data collected by the gyro sensor 412, the processor 401 may implement the following functions: motion sensing (such as changing the UI according to a user's tilting operation), image stabilization at the time of photographing, game control, and inertial navigation.

The pressure sensor 413 may be disposed on a side bezel of the terminal 400 and/or a lower layer of the touch display screen 405. When the pressure sensor 413 is disposed on the side frame of the terminal 400, a user's holding signal to the terminal 400 can be detected, and the processor 401 performs left-right hand recognition or shortcut operation according to the holding signal collected by the pressure sensor 413. When the pressure sensor 413 is disposed at the lower layer of the touch display screen 405, the processor 401 controls the operability control on the UI interface according to the pressure operation of the user on the touch display screen 405. The operability control comprises at least one of a button control, a scroll bar control, an icon control and a menu control.

The fingerprint sensor 414 is used for collecting a fingerprint of the user, and the processor 401 identifies the identity of the user according to the fingerprint collected by the fingerprint sensor 414, or the fingerprint sensor 414 identifies the identity of the user according to the collected fingerprint. Upon recognizing that the user's identity is a trusted identity, processor 401 authorizes the user to perform relevant sensitive operations including unlocking the screen, viewing encrypted information, downloading software, paying, and changing settings, etc. The fingerprint sensor 414 may be disposed on the front, back, or side of the terminal 400. When a physical key or vendor Logo is provided on the terminal 400, the fingerprint sensor 414 may be integrated with the physical key or vendor Logo.

The optical sensor 415 is used to collect the ambient light intensity. In one embodiment, the processor 401 may control the display brightness of the touch display screen 405 based on the ambient light intensity collected by the optical sensor 415. Specifically, when the ambient light intensity is high, the display brightness of the touch display screen 405 is increased; when the ambient light intensity is low, the display brightness of the touch display screen 405 is turned down. In another embodiment, the processor 401 may also dynamically adjust the shooting parameters of the camera assembly 406 according to the ambient light intensity collected by the optical sensor 415.

A proximity sensor 416, also known as a distance sensor, is typically disposed on the front panel of the terminal 400. The proximity sensor 416 is used to collect the distance between the user and the front surface of the terminal 400. In one embodiment, when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually decreases, the processor 401 controls the touch display screen 405 to switch from the bright screen state to the dark screen state; when the proximity sensor 416 detects that the distance between the user and the front surface of the terminal 400 gradually becomes larger, the processor 401 controls the touch display screen 405 to switch from the breath screen state to the bright screen state.

Those skilled in the art will appreciate that the configuration shown in fig. 4 is not intended to be limiting of terminal 400 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

An embodiment of the present invention further provides a non-transitory computer-readable storage medium, where instructions in the storage medium, when executed by a processor of a mobile terminal, enable the mobile terminal to perform the method for detecting an abnormality in coal bed methane provided in the embodiment shown in fig. 2.

Embodiments of the present invention also provide a computer program product containing instructions, which when run on a computer, cause the computer to perform the method for detecting an anomaly in coal bed methane provided in the embodiment shown in fig. 2.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

In summary, the present invention is only a preferred embodiment, and not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for anomaly detection of a coal-bed gas well, the method comprising:

2. The method of claim 1, wherein the detecting anomalies in the target coalbed methane well based on the plurality of parameter variation characteristics comprises:

3. The method of claim 1, wherein each of the plurality of production parameters is configured with a corresponding reference condition, the reference condition comprising a reference trend and a threshold amount of change;

4. The method of claim 3, wherein the plurality of production parameters include daily gas production, daily water production, casing pressure, coal shrinkage, and pipeline pressure;

5. The method according to claim 4, characterized in that the reference trend of change in the reference conditions configured for the daily gas production is a continuous decrease, and the threshold value of the amount of change is a first reference value;

6. The method of any one of claims 1 to 5, wherein after performing anomaly detection on the target coalbed methane well according to the plurality of parameter variation characteristics, the method further comprises:

7. An apparatus for anomaly detection in a coal bed gas well, the apparatus comprising:

8. The apparatus of claim 7, wherein the detection module comprises:

9. The apparatus of claim 7, wherein each of the plurality of production parameters is configured with a corresponding reference condition, the reference condition comprising a reference trend and a variation threshold;

the detection module comprises:

10. The apparatus of claim 9, wherein the plurality of production parameters include daily gas production, daily water production, casing pressure, coal shrinkage, and pipeline pressure;

the fourth determination unit includes:

11. The apparatus according to claim 10, wherein the reference trend of change in the reference condition configured for the daily gas production is a continuous decrease, and the threshold value of the amount of change is a first reference value;

12. The apparatus of any of claims 7 to 11, further comprising:

13. Device to carry out anomaly detection to coal bed gas well, its characterized in that, the device includes:

a processor;

a memory for storing processor-executable instructions;

wherein the processor is configured to perform the steps of any one of the methods of claim 1 to claim 6.

14. A computer readable storage medium having stored thereon instructions which, when executed by a processor, carry out the steps of any of the methods of claims 1 to 6.