Oil and gas field drilling fluid overflow leakage measuring system

Abstract

The invention relates to the technical field of drilling fluid overflow leakage measurement, in particular to an oil and gas field drilling fluid overflow leakage measurement system, which comprises a collector, an analyzer and a controller, and is characterized in that an abnormal risk characterization value can be accurately analyzed by collecting drilling fluid characteristic parameters through a drilling fluid overflow leakage measurement instrument, and the accuracy of the measurement system is improved. Whether the abnormal risk of the measuring equipment exists or not can be effectively judged by distinguishing the measuring abnormal tendency labels, and the defect that the measuring result of the drilling fluid overflow and leakage measuring instrument jumps due to flow differentiation caused by the change of the liquid level and the flow velocity of the oil and gas field drilling fluid along with different geological densities of stratums is overcome. And the efficiency of the measurement system is low due to the abnormal measurement result of the overflow leakage of the drilling fluid. By determining whether the risk of abnormal shielding of the environment exists or not, the problem that the accuracy of a measuring system is low due to the fact that interference signals appear in the beam angle of the measuring instrument when drilling fluid overflows due to the fact that the measuring instrument measures the protruding part of the bank terrace of the environment is solved.

Description

Technical Field

[0001] The invention relates to the technical field of drilling fluid leakage measurement, and in particular to an oil and gas field drilling fluid leakage measurement system. Background Art

[0002] As the global oil extraction industry continues to expand into deepwater areas, deep-sea resource exploitation faces many challenges, especially in the process of deepwater drilling. The geological density of different regions is different. The occurrence of well kicks and well leaks will bring a series of serious consequences such as equipment damage, increased costs and environmental pollution, which puts higher requirements on the effectiveness and timeliness of leak detection methods. Some existing technologies, such as methods that partially establish coupled flow models based on fluid mechanics principles for leak detection, although they have certain innovations in theory, still have problems such as complex models, large amount of calculations, and unsatisfactory real-time performance in practical applications. In summary, the development of an oil and gas field drilling fluid leak measurement system that can quickly and accurately detect early overflows and leaks and effectively avoid false alarms, missed alarms, and late reports is of great practical significance for ensuring the safe and efficient conduct of drilling operations.

[0003] Chinese patent publication number: CN 111456658 A, discloses an overflow and leakage monitoring system for a conventional drilling process, the monitoring system includes a data storage device, a height detection device, a flow rate measuring device, a computing device and a display device, the data storage device stores drilling tool parameters; the height detection device is arranged on a first device and can detect a first distance; the flow rate measuring device is arranged on a second device and can measure the drilling fluid flow rate at the second device; the computing device is connected to the data storage device, the height detection device and the flow rate measuring device respectively, can calculate the outlet flow rate of the drilling fluid in real time, and can also compare the outlet flow rate of the drilling fluid with the inlet flow rate; the display device is connected to the computing device, can obtain the outlet flow rate of the drilling fluid and display it in real time, and can issue an overflow warning and a leakage warning.

[0004] However, the prior art still has the following problems:

[0005] The problem that the drilling fluid level and flow rate of oil and gas field drilling fluid change with the different geological density of the formation, resulting in flow differentiation, causes the measurement results of the drilling fluid leakage meter to fluctuate, thus causing abnormal drilling fluid leakage measurement results and low measurement system efficiency is not considered;

[0006] The problem of low accuracy of the measurement system is not considered, because the shore, terrace and wall protrusions of the measurement environment of the drilling fluid leakage meter in the oil and gas field may cause interference signals inside the beam angle of the drilling fluid leakage meter. Summary of the invention

[0007] In order to solve the above problems, the present invention provides an oil and gas field drilling fluid leakage measurement system, which overcomes the problem in the prior art that the drilling fluid in the oil and gas field does not take into account the difference in the geological density of the formation, which causes the change in the drilling fluid level and flow rate, resulting in flow differentiation, causing the measurement result of the drilling fluid leakage meter to fluctuate, thereby causing abnormal drilling fluid leakage measurement results and low measurement system efficiency;

[0008] Furthermore, it does not take into account the problem of low accuracy of the measurement system caused by interference signals inside the beam angle of the drilling fluid leakage meter in the oil and gas field due to the protruding parts of the shore, terrace and wall in the measurement environment.

[0009] To achieve the above object, the present invention provides an oil and gas field drilling fluid leakage measurement system, comprising:

[0010] The collector comprises a drilling fluid leakage detector arranged on a support rod for collecting characteristic parameters of the drilling fluid, and a position adjustment component connected to the support rod for collecting installation characteristic parameters of the drilling fluid leakage detector;

[0011] An analyzer connected to the collector and used to analyze the abnormal risk characterization value based on the drilling fluid characteristic parameters;

[0012] A controller, which is connected to the collector and the analyzer respectively, and includes a clustering unit and a control unit, wherein the clustering unit is used to distinguish measurement abnormal tendency labels based on abnormal risk characterization values ​​corresponding to time periods;

[0013] The control unit monitors the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit, including determining whether there is an abnormal risk of the measuring equipment based on the change of the abnormal risk characterization value within a time period, so as to determine the installation height of the drilling fluid leakage calibration instrument;

[0014] Or, it is used to analyze the abnormal liquid level characterization value based on the change of the liquid level height of the drilling fluid within a time period, and to determine whether there is an abnormal environment shielding risk based on the increase amplitude of the abnormal liquid level characterization value, so as to determine the installation angle of the drilling fluid leakage calibration instrument;

[0015] The drilling fluid leakage measurement system is monitored based on the determined installation characteristic parameters of the drilling fluid leakage accumulator;

[0016] The drilling fluid characteristic parameters include the outlet flow rate, liquid level height and outlet flow rate of the drilling fluid; and the installation characteristic parameters include the installation height and angle.

[0017] Furthermore, the position adjustment component is provided with a camera for collecting the positions of the bracket and the drilling fluid leakage meter, and an adjustment mechanism connected to the bracket for controlling the installation height and angle of the drilling fluid leakage meter.

[0018] Furthermore, the analyzer is used to analyze the abnormal risk characterization value based on the drilling fluid characteristic parameters, including:

[0019] The ratio of the outlet flow rate of the drilling fluid to the predetermined flow rate threshold is used to calculate the first abnormal factor;

[0020] The ratio of the liquid level height of the drilling fluid to the predetermined liquid level threshold is used to calculate and determine as the second abnormal factor;

[0021] The ratio of the outlet flow rate of the drilling fluid to the predetermined flow rate threshold is used to calculate the third abnormal factor;

[0022] The sum of the first abnormal factor, the second abnormal factor and the third abnormal factor is used to calculate and determine as the abnormal risk characterization value.

[0023] Furthermore, the clustering unit is used to distinguish the measurement abnormal tendency labels based on the abnormal risk characterization values ​​corresponding to the time period, including:

[0024] If the abnormal risk characterization value is greater than the preset abnormal risk characterization value threshold, it is determined to be a first measurement abnormal tendency label;

[0025] If the abnormal risk characterization value is less than or equal to the preset abnormal risk characterization value threshold, it is determined to be a second measurement abnormal tendency label.

[0026] Furthermore, the control unit is used to monitor the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit, including:

[0027] If it is determined to be the first measurement abnormal tendency label, whether there is an abnormal risk of the measuring equipment is determined based on the change of the abnormal risk characterization value within the time period, so as to determine the installation height of the drilling fluid leakage calibration instrument;

[0028] If it is determined to be the second measurement abnormality tendency label, the liquid level abnormality characterization value is analyzed based on the change in the liquid level height of the drilling fluid within a time period, and is used to determine whether there is a risk of environmental abnormality obstruction based on the increase in the liquid level abnormality characterization value, so as to determine the installation angle of the drilling fluid overflow calibration instrument.

[0029] Furthermore, the control unit determines whether there is an abnormal risk of the measuring device based on the change of the abnormal risk characterization value within a time period, including:

[0030] To determine the magnitude of change in the abnormal risk characterization value within a time period;

[0031] If the variation range is greater than or equal to a preset variation threshold, it is determined that there is a risk of abnormality of the measuring device.

[0032] Furthermore, the control unit is used to analyze the abnormal liquid level characterization value based on the change of the liquid level height of the drilling fluid within a time period, including:

[0033] Used to calculate the change in the drilling fluid level within a time period;

[0034] The ratio of the change amplitude of the liquid level height to the predetermined time period is calculated and determined as the liquid level abnormality influencing factor;

[0035] The ratio of the liquid level abnormality influencing factor to a predetermined influencing factor threshold is used to calculate and is determined as the liquid level abnormality characterization value.

[0036] Furthermore, the control unit is used to determine whether there is an environmental abnormality shielding risk based on the increase amplitude of the liquid level abnormality characterization value, including:

[0037] To determine the increase of the abnormal liquid level characterization value within a time period;

[0038] If the increase is greater than or equal to a preset liquid level jump threshold, it is determined that there is a risk of abnormal environmental occlusion.

[0039] Furthermore, the control unit is used to determine the installation height of the drilling fluid leakage calibration instrument based on the variance of the abnormal risk characterization value.

[0040] Furthermore, the control unit is used to determine the installation angle of the drilling fluid leakage calibration instrument based on the variance of the liquid level abnormality characterization value.

[0041] Compared with the prior art, the present invention provides an oil and gas field drilling fluid leakage measurement system, including a collector, an analyzer and a controller. The present invention can accurately analyze the abnormal risk characterization value by collecting drilling fluid characteristic parameters through a drilling fluid leakage meter, thereby improving the accuracy of the oil and gas field drilling fluid leakage measurement system. By distinguishing the measurement abnormality tendency label, it can effectively determine whether there is an abnormal risk of measurement equipment, overcome the problem that the drilling fluid level and flow rate of the oil and gas field drilling fluid change with the geological density of the formation, resulting in flow differentiation, causing the drilling fluid leakage meter measurement result to jump, thereby causing the drilling fluid leakage measurement result to be abnormal and resulting in low efficiency of the measurement system, and improve the efficiency of the oil and gas field drilling fluid leakage measurement system. By determining whether there is an abnormal environmental shielding risk, the oil and gas field drilling fluid leakage meter overcomes the problem that the drilling fluid leakage meter has interference signals inside the beam angle of the drilling fluid leakage meter due to the shore, terrace, and wall protrusions of the measurement environment, thereby causing low accuracy of the measurement system.

[0042] In particular, the present invention can accurately determine the installation height and angle of the drilling fluid leakage meter by collecting the position of the drilling fluid leakage meter through a camera, thereby overcoming the problem that the drilling fluid level changes in oil and gas fields vary with the geological density of the formation, resulting in abnormal drilling fluid leakage measurement results and low efficiency of the measurement system. At the same time, it reduces the occurrence of misjudgments caused by manual adjustment of the installation position of the meter, thereby improving the efficiency of the oil and gas field drilling fluid leakage measurement system.

[0043] In particular, the present invention can accurately analyze abnormal risk characterization values ​​through drilling fluid characteristic parameters including the outlet flow velocity, liquid level height and outlet flow rate of the drilling fluid, and distinguish measurement abnormal tendency labels through abnormal risk characterization values ​​corresponding to time periods, thereby reducing the occurrence of misjudgment of measurement abnormal tendencies and improving the accuracy of oil and gas field drilling fluid leakage measurement systems.

[0044] In particular, the present invention can effectively distinguish measurement abnormality tendency labels through abnormal risk characterization values ​​corresponding to time periods. If the measurement result jumps in the direction of rising water levels, according to actual conditions, the reason is that the calibrator measures other interference signals inside the beam angle, such as the shore, terrace, and wall protrusions. At this time, the installation angle is adjusted to avoid the direction of the interference. This overcomes the problem of low accuracy of the measurement system due to interference signals inside the beam angle of the drilling fluid leakage calibrator in oil and gas fields caused by the shore, terrace, and wall protrusions in the measurement environment.

[0045] In particular, the present invention can effectively determine the installation height of the drilling fluid leakage meter and automatically adjust it by judging whether there is an abnormal risk of the measuring equipment, thereby reducing the occurrence of misjudgment caused by manual adjustment of the installation height, saving manual adjustment time, and improving the efficiency of the oil and gas field drilling fluid leakage measurement system.

[0046] In particular, the present invention can effectively determine the installation angle of the drilling fluid leakage meter and automatically adjust it by judging whether there is a risk of environmental abnormality obstruction, thereby reducing the occurrence of blind spots in the angle adjustment of the meter itself and improving the accuracy of the oil and gas field drilling fluid leakage measurement system. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a structural block diagram of the oil and gas field drilling fluid leakage measurement system of the embodiment;

[0048] Figure 2 It is a logic flow chart of analyzing abnormal risk characterization values ​​based on drilling fluid characteristic parameters in an embodiment;

[0049] Figure 3 A logical decision diagram for distinguishing measurement abnormal tendency labels based on abnormal risk characterization values ​​corresponding to time periods in an embodiment;

[0050] Figure 4 This is a logic decision diagram for the control unit of the embodiment to monitor the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit. DETAILED DESCRIPTION

[0051] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0052] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0053] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] See also Figure 1 As shown, it is a structural block diagram of an oil and gas field drilling fluid leakage measurement system according to an embodiment of the present invention. The present invention provides an oil and gas field drilling fluid leakage measurement system, comprising:

[0055] The collector comprises a drilling fluid leakage detector arranged on a support rod for collecting characteristic parameters of the drilling fluid, and a position adjustment component connected to the support rod for collecting installation characteristic parameters of the drilling fluid leakage detector;

[0056] An analyzer connected to the collector and used to analyze the abnormal risk characterization value based on the drilling fluid characteristic parameters;

[0057] A controller, which is connected to the collector and the analyzer respectively, and includes a clustering unit and a control unit, wherein the clustering unit is used to distinguish measurement abnormal tendency labels based on abnormal risk characterization values ​​corresponding to time periods;

[0058] The control unit monitors the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit, including determining whether there is an abnormal risk of the measuring equipment based on the change of the abnormal risk characterization value within a time period, so as to determine the installation height of the drilling fluid leakage calibration instrument;

[0059] Or, it is used to analyze the abnormal liquid level characterization value based on the change of the liquid level height of the drilling fluid within a time period, and to determine whether there is an abnormal environment shielding risk based on the increase amplitude of the abnormal liquid level characterization value, so as to determine the installation angle of the drilling fluid leakage calibration instrument;

[0060] The drilling fluid leakage measurement system is monitored based on the determined installation characteristic parameters of the drilling fluid leakage accumulator;

[0061] The drilling fluid characteristic parameters include the outlet flow rate, liquid level height and outlet flow rate of the drilling fluid; and the installation characteristic parameters include the installation height and angle.

[0062] It is understandable that there is no limitation on the model of the drilling fluid leakage meter, including but not limited to the ARQ3000 series drilling fluid leakage meter. Any measuring instrument that can measure the outlet flow rate, liquid level height and outlet flow rate of the drilling fluid is acceptable, and no further elaboration is given here.

[0063] It can be understood that the drilling fluid leakage meter refers to a product that uses microwaves to measure the drilling fluid velocity and level, converts the drilling fluid flow rate through an integral model, and accurately measures the drilling fluid leakage based on the measured data. It can measure the drilling fluid leakage data in real time around the clock, and the non-contact measurement is not easily affected by the measurement environment.

[0064] It is understandable that the advantages of the drilling fluid leakage meter include but are not limited to the following: non-contact measurement based on mixed-band microwaves, flow velocity, liquid level, and flow rate are output simultaneously without interfering with each other, low maintenance, and not affected by mud and sand; IP68 waterproof function, internal glue filling, suitable for various field environments, suitable for various extreme weather environments; small and compact appearance; integrated anti-reverse connection, lightning protection, and overvoltage protection functions; support mobile phone Bluetooth debugging, convenient for on-site maintenance work.

[0065] It can be understood that for the drilling fluid leakage detector, the speed measurement range of the embodiment is 0.1m / s to 10m / s; the maximum ranging range is 30m; the ranging blind area is 80mm, the ranging antenna beam angle is 6°; and the maximum distance from the liquid surface is 30m.

[0066] It is understandable that the angle between the flow velocity module and the liquid surface determines the stability and reliability of the flow velocity measurement. If the angle is too small, the echo of the collimator is too weak, the collimator cannot measure stably, and the measurement result is unreliable. If the inclination angle of the collimator is too large, for example, between 85° and 90°, the collimator cannot sense the Doppler frequency shift of the drilling fluid flow, and the measurement result will also be unreliable. The present invention can further automatically compensate the built-in gyroscope of the collimator by adjusting the installation angle, thereby improving the accuracy of the drilling fluid leakage measurement system.

[0067] It is understandable that, as for the influence of the installation height of the collimator, the farther the collimator of the present invention is from the liquid surface, the weaker the echo received by the collimator, and the worse the ability of the collimator to correctly detect the flow velocity of the drilling fluid. The collimator should not be too close to the liquid surface, as it is easy to be submerged by the flow of drilling fluid. If you want to measure an extremely low flow rate (<0.1m / s) or a relatively calm liquid surface, a close-range test is required to increase the energy of the echo received by the collimator. The embodiment is 30cm away from the liquid surface. In order to ensure normal measurement of the liquid level, the present invention can ensure that the installation height is much larger than the blind spot of the collimator and smaller than the farthest test limit of the collimator.

[0068] Specifically, the oil and gas field drilling fluid leakage measurement system provided by the present invention includes a collector, an analyzer and a controller. The present invention can accurately analyze the abnormal risk characterization value by collecting the characteristic parameters of the drilling fluid through the drilling fluid leakage meter, thereby improving the accuracy of the oil and gas field drilling fluid leakage measurement system. By distinguishing the measurement abnormality tendency label, it can effectively determine whether there is an abnormal risk of the measurement equipment, overcome the problem that the drilling fluid in the oil and gas field causes the drilling fluid level to change differently with the different geological density of the formation, resulting in the drilling fluid leakage meter measurement result jumping, thereby causing the drilling fluid leakage measurement result to be abnormal and resulting in low efficiency of the measurement system, and improve the efficiency of the oil and gas field drilling fluid leakage measurement system. By determining whether there is an abnormal environmental shielding risk, it overcomes the problem that the oil and gas field drilling fluid leakage meter has interference signals inside the beam angle of the drilling fluid leakage meter due to the shore, terrace, and wall protrusions of the measurement environment, thereby causing low accuracy of the measurement system.

[0069] Specifically, the position adjustment component of the present invention is provided with a camera for collecting the positions of the bracket and the drilling fluid leakage meter, and an adjustment mechanism connected to the bracket for controlling the installation height and angle of the drilling fluid leakage meter.

[0070] It is understandable that there is no limitation on the camera device, and any camera that can capture and analyze the positions of the bracket and the drilling fluid leakage meter is sufficient. There is no limitation on the specific device of the adjustment mechanism, and any device that can accurately adjust the installation height and angle of the drilling fluid leakage meter is sufficient, and no further details are given here.

[0071] See also Figure 2 As shown, it is a logic flow chart of analyzing abnormal risk characterization values ​​based on drilling fluid characteristic parameters of the present invention. The analyzer of the present invention is used to analyze abnormal risk characterization values ​​based on the drilling fluid characteristic parameters, including:

[0072] The ratio of the outlet flow rate of the drilling fluid to the predetermined flow rate threshold is used to calculate the first abnormal factor;

[0073] The ratio of the liquid level height of the drilling fluid to the predetermined liquid level threshold is used to calculate and determine as the second abnormal factor;

[0074] The ratio of the outlet flow rate of the drilling fluid to the predetermined flow rate threshold is used to calculate the third abnormal factor;

[0075] The sum of the first abnormal factor, the second abnormal factor and the third abnormal factor is used to calculate and determine as the abnormal risk characterization value.

[0076] It can be understood that the predetermined flow rate threshold is 1.12 times the average value of the outlet flow rate of the drilling fluid monitored within the first three months of the historical period of the system; the predetermined liquid level height is 1.08 times the average value of the liquid level height of the drilling fluid monitored within the first three months of the historical period of the system; and the predetermined flow rate threshold is 1.15 times the average value of the outlet flow rate of the drilling fluid monitored within the first three months of the historical period of the system.

[0077] See also Figure 3 As shown, it is a logical decision diagram for distinguishing measurement abnormal tendency labels based on abnormal risk characterization values ​​corresponding to time periods according to an embodiment of the present invention. The clustering unit of the present invention is used to distinguish measurement abnormal tendency labels based on abnormal risk characterization values ​​corresponding to time periods, including:

[0078] If the abnormal risk characterization value is greater than the preset abnormal risk characterization value threshold, it is determined to be a first measurement abnormal tendency label;

[0079] If the abnormal risk characterization value is less than or equal to the preset abnormal risk characterization value threshold, it is determined to be a second measurement abnormal tendency label.

[0080] It is understandable that the abnormal risk characterization value threshold preset in the implementation is 1.2 to 1.3 times the average value of the abnormal risk characterization values ​​monitored by the system in the first three months of the historical period.

[0081] See also Figure 4 As shown, it is a logic decision diagram of the control unit of an embodiment of the present invention for monitoring the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit. The control unit of the present invention is used to monitor the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit, including:

[0082] If it is determined to be the first measurement abnormal tendency label, whether there is an abnormal risk of the measuring equipment is determined based on the change of the abnormal risk characterization value within the time period, so as to determine the installation height of the drilling fluid leakage calibration instrument;

[0083] If it is determined to be the second measurement abnormality tendency label, the liquid level abnormality characterization value is analyzed based on the change in the liquid level height of the drilling fluid within a time period, and is used to determine whether there is a risk of environmental abnormality obstruction based on the increase in the liquid level abnormality characterization value, so as to determine the installation angle of the drilling fluid overflow calibration instrument.

[0084] It is understandable that in the implementation of oil and gas field drilling fluid, the drilling fluid level and flow rate change with the different geological density of the formation, resulting in flow differentiation, causing the measurement results of the drilling fluid leakage meter to fluctuate, thereby causing abnormal drilling fluid leakage measurement results. In this case, the installation height should be adjusted to avoid the blind spot of ranging.

[0085] It is understandable that if the liquid level height measurement result jumps in the direction of rising water level during implementation, according to the actual situation, the reason tends to be that the collimator measures other interference signals within the beam angle, such as the shore, terrace, and wall protrusions. In this case, the installation angle is adjusted to avoid the direction of the interference.

[0086] Specifically, the control unit determines whether there is an abnormal risk of the measuring device based on the change of the abnormal risk characterization value within a time period, including:

[0087] To determine the magnitude of change in the abnormal risk characterization value within a time period;

[0088] If the change amplitude is less than a preset change threshold, it is determined that there is no abnormal risk of the measuring device;

[0089] If the variation range is greater than or equal to a preset variation threshold, it is determined that there is a risk of abnormality of the measuring device.

[0090] It can be understood that the time period in implementation is 1s, and the preset change threshold is 1.13 times the average value of the change amplitude of the abnormal risk characterization value monitored by the system in the first three months of the historical period.

[0091] Specifically, the control unit is used to analyze the abnormal liquid level characterization value based on the change of the liquid level height of the drilling fluid within a time period, including:

[0092] Used to calculate the change in the drilling fluid level within a time period;

[0093] The ratio of the change amplitude of the liquid level height to the predetermined time period is calculated and determined as the liquid level abnormality influencing factor;

[0094] The ratio of the liquid level abnormality influencing factor to a predetermined influencing factor threshold is used to calculate and is determined as the liquid level abnormality characterization value.

[0095] It can be understood that the present invention can accurately evaluate the operating status of the drilling fluid leakage measurement system by calculating the variation range of the drilling fluid level within a time period.

[0096] It can be understood that the predetermined time period in the embodiment is 1 second, and the predetermined impact factor threshold is 1.11 times the average value of the abnormal liquid level impact factor monitored by the system in the first three months of the historical period.

[0097] Specifically, the control unit is used to determine whether there is an environmental abnormality shielding risk based on the increase amplitude of the liquid level abnormality characterization value, including:

[0098] To determine the increase of the abnormal liquid level characterization value within a time period;

[0099] If the increase is less than the preset liquid level jump threshold, it is determined that there is no risk of abnormal environmental occlusion;

[0100] If the increase is greater than or equal to a preset liquid level jump threshold, it is determined that there is a risk of abnormal environmental occlusion.

[0101] It can be understood that the preset liquid level jump threshold is 1.18 times the average value of the increase in the abnormal liquid level characteristic value monitored by the system in the first three months of the historical period.

[0102] Specifically, the control unit is used to determine the installation height of the drilling fluid leakage measuring instrument, including:

[0103] Used to calculate the variance of the abnormal risk characterization value within the time period;

[0104] The installation height of the drilling fluid leakage calibrator is determined based on the variance of the abnormal risk characterization value.

[0105] Specifically, the installation height of the drilling fluid leakage detector is adjusted based on the variance of the abnormal risk characterization value, including:

[0106] If the variance of the abnormal risk characterization value is greater than or equal to the predetermined variance of the abnormal risk characterization value, then adjusting the installation height of the drilling fluid leakage calibration instrument based on the variance of the abnormal risk characterization value, wherein the adjustment range of the installation height is determined by the variance of the abnormal risk characterization value;

[0107] If the variance of the abnormal risk characterization value is less than the predetermined variance of the abnormal risk characterization value, monitoring continues.

[0108] It is understandable that the variance of the predetermined abnormal risk characterization value is 1.14 times the variance of the abnormal risk characterization value monitored by the system in the first three months of the historical period. If the variance is large, it means that the abnormal risk characterization value fluctuates greatly during the time period, and there may be abnormal risk of measuring equipment. At this time, the control unit will reduce the installation height of the drilling fluid leakage gauge to ensure the stable operation of the system. If the variance is small, it means that the abnormal risk characterization value fluctuates less during the time period, and there is no abnormal risk of measuring equipment. At this time, the control unit will continue to monitor.

[0109] Specifically, the control unit is used to determine the installation angle of the drilling fluid leakage measuring instrument, including:

[0110] Used to calculate the variance of the abnormal liquid level characterization value within a time period;

[0111] The invention is used to determine the installation angle of the drilling fluid leakage measuring instrument based on the variance of the liquid level abnormality characterization value.

[0112] Specifically, determining the installation angle of the drilling fluid leakage measuring instrument based on the variance of the liquid level abnormality characterization value includes:

[0113] If the variance of the liquid level abnormality characterization value is less than the predetermined variance of the liquid level abnormality characterization value, continue monitoring;

[0114] If the variance of the liquid level anomaly characterization value is greater than or equal to the predetermined variance of the liquid level anomaly characterization value, the installation angle of the drilling fluid leakage calibration instrument is determined, and the adjustment range of the installation angle is determined by the variance of the liquid level anomaly characterization value.

[0115] It can be understood that the variance of the predetermined liquid level abnormality characterization value is 1.21 times the variance of the liquid level abnormality characterization value monitored by the system in the first three months of the historical period.

[0116] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An oil and gas field drilling fluid leakage measurement system, characterized in that: include: The collector comprises a drilling fluid leakage detector arranged on a support rod for collecting characteristic parameters of the drilling fluid, and a position adjustment component connected to the support rod for collecting installation characteristic parameters of the drilling fluid leakage detector; An analyzer connected to the collector and used to analyze the abnormal risk characterization value based on the drilling fluid characteristic parameters; A controller, which is connected to the collector and the analyzer respectively, and includes a clustering unit and a control unit, wherein the clustering unit is used to distinguish measurement abnormal tendency labels based on abnormal risk characterization values ​​corresponding to time periods; The control unit monitors the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit, including determining whether there is an abnormal risk of the measuring equipment based on the change of the abnormal risk characterization value within a time period, so as to determine the installation height of the drilling fluid leakage calibration instrument; Or, it is used to analyze the abnormal liquid level characterization value based on the change of the liquid level height of the drilling fluid within a time period, and to determine whether there is an abnormal environment shielding risk based on the increase amplitude of the abnormal liquid level characterization value, so as to determine the installation angle of the drilling fluid leakage calibration instrument; The drilling fluid leakage measurement system is monitored based on the determined installation characteristic parameters of the drilling fluid leakage accumulator; The drilling fluid characteristic parameters include the outlet flow rate, liquid level height and outlet flow rate of the drilling fluid; and the installation characteristic parameters include the installation height and angle.

2. The oil and gas field drilling fluid leakage measurement system according to claim 1, characterized in that: The position adjustment component is provided with a camera for collecting the positions of the bracket and the drilling fluid leakage meter, and an adjustment mechanism connected to the bracket for controlling the installation height and angle of the drilling fluid leakage meter.

3. The oil and gas field drilling fluid leakage measurement system according to claim 1, characterized in that: The analyzer is used to analyze the abnormal risk characterization value based on the drilling fluid characteristic parameters, including: The ratio of the outlet flow rate of the drilling fluid to the predetermined flow rate threshold is used to calculate the first abnormal factor; The ratio of the liquid level height of the drilling fluid to the predetermined liquid level threshold is used to calculate and determine as the second abnormal factor; The ratio of the outlet flow rate of the drilling fluid to the predetermined flow rate threshold is used to calculate the third abnormal factor; The sum of the first abnormal factor, the second abnormal factor and the third abnormal factor is used to calculate and determine as the abnormal risk characterization value.

4. The oil and gas field drilling fluid leakage measurement system according to claim 1, characterized in that: The clustering unit is used to distinguish and measure abnormal tendency labels based on abnormal risk characterization values ​​corresponding to time periods, including: If the abnormal risk characterization value is greater than the preset abnormal risk characterization value threshold, it is determined to be a first measurement abnormal tendency label; If the abnormal risk characterization value is less than or equal to the preset abnormal risk characterization value threshold, it is determined to be a second measurement abnormal tendency label.

5. The oil and gas field drilling fluid leakage measurement system according to claim 4, characterized in that: The control unit is used to monitor the operating state of the drilling fluid leakage measurement system in response to the division result of the clustering unit, including: If it is determined to be the first measurement abnormal tendency label, whether there is an abnormal risk of the measuring equipment is determined based on the change of the abnormal risk characterization value within the time period, so as to determine the installation height of the drilling fluid leakage calibration instrument; If it is determined to be the second measurement abnormality tendency label, the liquid level abnormality characterization value is analyzed based on the change in the liquid level height of the drilling fluid within a time period, and is used to determine whether there is a risk of environmental abnormality obstruction based on the increase in the liquid level abnormality characterization value, so as to determine the installation angle of the drilling fluid overflow calibration instrument.

6. The oil and gas field drilling fluid leakage measurement system according to claim 1, characterized in that: The control unit determines whether there is a risk of abnormality of the measuring device based on the change of the abnormal risk characterization value within a time period, include, To determine the magnitude of change in the abnormal risk characterization value within a time period; If the variation range is greater than or equal to a preset variation threshold, it is determined that there is a risk of abnormality of the measuring device.

7. The oil and gas field drilling fluid leakage measurement system according to claim 1, characterized in that: The control unit is used to analyze the abnormal liquid level characterization value based on the change of the liquid level height of the drilling fluid within a time period, including: Used to calculate the change in the drilling fluid level within a time period; The ratio of the change amplitude of the liquid level height to the predetermined time period is calculated and determined as the liquid level abnormality influencing factor; The ratio of the liquid level abnormality influencing factor to a predetermined influencing factor threshold is used to calculate and is determined as the liquid level abnormality characterization value.

8. The oil and gas field drilling fluid leakage measurement system according to claim 1, characterized in that: The control unit is used to determine whether there is an abnormal environment shielding risk based on the increase in the liquid level abnormality characterization value. include, To determine the increase of the abnormal liquid level characterization value within a time period; If the increase is greater than or equal to a preset liquid level jump threshold, it is determined that there is a risk of abnormal environmental occlusion.

9. The oil and gas field drilling fluid leakage measurement system according to claim 5, characterized in that: The control unit is used to determine the installation height of the drilling fluid leakage calibrator based on the variance of the abnormal risk characterization value.

10. The oil and gas field drilling fluid leakage measurement system according to claim 5, characterized in that: The control unit is used to determine the installation angle of the drilling fluid leakage measuring instrument based on the variance of the liquid level abnormality characterization value.

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