Flowmeter valve fault detection method, device and system

Abstract

The invention discloses a flowmeter valve fault detection method, device and system, and the method comprises the steps: carrying out the fluid flow velocity measurement and fluid component measurement of a multi-phase fluid generated at a wellhead based on a magnetic resonance flowmeter located on a field branch pipeline, if the magnetic resonance flowmeter fails in fluid flow velocity measurement or fluid component measurement, the magnetic resonance flowmeter is started; if yes, fault detection is carried out on a first valve, a second valve and a third valve based on a first pressure gauge located at a wellhead, a second pressure gauge located on an output pipeline, a fourth valve and a fifth valve which are located on a field branch pipeline, a sixth valve located on a field main pipeline, a temperature and pressure gauge and a pressure release valve; and determining a target valve with a fault and a fault state corresponding to the target valve. Through the technical scheme of the embodiment of the invention, rapid detection of the fault of the flow meter valve is realized, manual participation is reduced, and the fault detection efficiency of the flow meter valve is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid metering, and in particular to a flow meter valve fault detection method, device and system. Background Art

[0002] In the oil production process, the multiphase flow produced from the wellhead is transmitted by pipelines. It is necessary to use a multiphase flowmeter to complete the real-time online detection of the flow of each phase of oil and gas without separating the three phases of oil, gas and water. In the process of measuring and detecting with a multiphase flowmeter, the valve in the flowmeter is needed to control the flow state of the fluid. However, the valve in the flowmeter is a consumable and vulnerable part, which is prone to damage and failure.

[0003] At present, the detection of flow meter valve failure mainly adopts manual detection. When a valve failure is suspected, each valve needs to be manually checked, and the troubleshooting process is relatively slow. In addition, the on-site manifold and equipment are connected by metal manifolds, and the parts are heavy and bulky, making them difficult to disassemble. When a valve failure is suspected, it is impossible to disassemble the pipeline to observe and judge the working status of the valve, which makes the detection of valve failure extremely difficult. Summary of the invention

[0004] The present invention provides a flow meter valve failure method, device and system to realize rapid detection of flow meter valve failure, reduce manual participation and improve the efficiency of flow meter valve failure detection.

[0005] In a first aspect, an embodiment of the present invention provides a flow meter valve fault detection method, comprising:

[0006] Based on the magnetic resonance flowmeter located on the field branch pipeline, the multiphase fluid generated at the wellhead is measured for fluid flow rate and fluid component, wherein the magnetic resonance flowmeter comprises: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve located on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline;

[0007] If the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, based on the first pressure gauge at the wellhead, the second pressure gauge on the external transmission pipeline, the fourth valve and the fifth valve on the on-site branch pipeline, the sixth valve on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with the fault and the fault state corresponding to the target valve;

[0008] Among them, the fourth valve and the fifth valve are used to control the flow state of the on-site branch pipeline; the sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline.

[0009] In a second aspect, an embodiment of the present invention further provides a flow meter valve fault detection device, comprising:

[0010] A fluid measurement module, used for measuring the fluid flow rate and fluid composition of the multiphase fluid generated at the wellhead based on a magnetic resonance flowmeter located on a field branch pipeline, wherein the magnetic resonance flowmeter comprises: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve located on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline;

[0011] a fault detection module, configured to, if the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, perform fault detection on the first valve, the second valve and the third valve based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, and determine the target valve with the fault and the fault state corresponding to the target valve;

[0012] Among them, the fourth valve and the fifth valve are used to control the flow state of the on-site branch pipeline; the sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline.

[0013] In a third aspect, an embodiment of the present invention further provides a flow meter valve fault detection system, characterized in that the system comprises: a processor, a magnetic resonance flow meter located on a field branch pipeline, a first pressure gauge located at a wellhead, a second pressure gauge located on an external transmission pipeline, a fourth valve and a fifth valve located on the field branch pipeline, and a sixth valve located on the field main pipeline; wherein,

[0014] The magnetic resonance flowmeter comprises: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline;

[0015] The fourth valve and the fifth valve are used to control the flow state of the on-site branch pipeline; the sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline;

[0016] The processor is used to implement the flow meter valve fault detection method provided by any embodiment of the present invention.

[0017] The technical solution of the embodiment of the present invention is to measure the fluid flow rate and fluid components of the multiphase fluid generated at the wellhead through a magnetic resonance flowmeter located on the field branch pipeline. If the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the field branch pipeline, the sixth valve located on the field main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with fault and the fault state corresponding to the target valve, thereby realizing rapid detection of flowmeter valve faults, reducing manual participation, improving the efficiency of flowmeter valve fault detection, and being able to repair the faulty valve in time, avoiding the problem of long oil production stagnation time due to valve faults, and greatly reducing the economic losses caused by oil production stagnation.

[0018] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a flow chart of a flow meter valve fault detection method provided according to Embodiment 1 of the present invention;

[0021] Figure 2 is a structural schematic diagram of a magnetic resonance flowmeter according to Embodiment 1 of the present invention;

[0022] Figure 3 is a flow chart of a flow meter valve fault detection method provided according to Embodiment 2 of the present invention;

[0023] Figure 4 This is a flow meter valve detection flow chart when a fluid flow rate measurement fails according to the second embodiment of the present invention;

[0024] Figure 5 is a flow chart of a flow meter valve fault detection method provided in accordance with Embodiment 3 of the present invention;

[0025] Figure 6 is a flow meter valve detection flow chart when a fluid component measurement fails according to Embodiment 3 of the present invention;

[0026] Figure 7 is a structural schematic diagram of a flow meter valve fault detection device provided according to a fourth embodiment of the present invention;

[0027] Figure 8 It is a structural schematic diagram of a flow meter valve fault detection system provided in Embodiment 4 of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0029] It should be noted that the terms "target", "current", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0030] Embodiment 1

[0031] Figure 1 A flow chart of a flow meter valve fault detection method is provided for the first embodiment of the present invention. This embodiment is applicable to the case of performing fault detection on valves in a magnetic resonance flow meter. Figure 1 As shown, the method can be performed by a flow meter valve fault detection device, which can be implemented in the form of hardware and / or software, and the device can be integrated into a processor. Figure 1 As shown, the method specifically comprises the following steps:

[0032] S110. Based on a magnetic resonance flowmeter located on a field branch pipeline, the multiphase fluid generated at the wellhead is measured for flow velocity and fluid composition, wherein the magnetic resonance flowmeter comprises: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve located on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline.

[0033] Among them, the field branch pipeline may refer to a spare pipeline for conveying fluid. The magnetic resonance flowmeter may refer to an instrument that uses the principle of nuclear magnetic resonance to measure the components and flow rate of the fluid. Multiphase fluid may refer to a fluid in which gaseous, liquid, and solid substances flow in a mixed manner. The metering main pipeline may refer to a pipeline where the magnetic resonance probe is located. The metering branch pipeline may refer to a pipeline that allows the fluid to flow normally through the magnetic resonance flowmeter when the magnetic resonance probe is in a stationary measurement. The first valve may refer to a valve that controls the flow of fluid into the metering main pipeline. The magnetic resonance probe may refer to a device for detecting magnetic resonance signals. The temperature and pressure gauge may refer to an instrument for measuring temperature and pressure data. The pressure relief valve may refer to a valve that controls the opening and closing of the pressure relief. The third valve may refer to a valve that controls the flow of fluid out of the metering main pipeline. The second valve may refer to a valve that controls the flow state of the metering branch pipeline. It should be noted that the first valve, the second valve, and the third valve may all be electric valves. The flow state may include a normal flow state or a blocked state of the fluid.

[0034] Specifically, Figure 2As shown, the magnetic resonance flowmeter is located on the field branch road. The multiphase fluid flowing into the metering main pipeline flows out through the first valve, magnetic resonance probe, temperature and pressure gauge, pressure relief valve and third valve located on the metering main pipeline in turn. The multiphase fluid flowing into the metering branch pipeline flows out through the second valve. The metering branch pipeline can ensure that the fluid can still flow normally when the magnetic resonance probe is in static measurement. The magnetic resonance flowmeter measures the fluid flow rate of the multiphase fluid generated at the wellhead in the flowing measurement state, and measures the fluid components of the multiphase fluid generated at the wellhead in the static measurement state.

[0035] S120. If the magnetic resonance flowmeter fails to measure the fluid velocity or the fluid component, the first valve, the second valve and the third valve are tested for faults based on the first pressure gauge at the wellhead, the second pressure gauge on the external transmission pipeline, the fourth valve and the fifth valve on the on-site branch pipeline, the sixth valve on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, to determine the target valve with faults and the fault state corresponding to the target valve; wherein the fourth valve and the fifth valve are valves used to control the flow state of the on-site branch pipeline. The sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline.

[0036] Among them, the first pressure gauge may refer to an instrument for measuring wellhead pressure data. The external transmission pipeline may refer to a pipeline that receives the fluid flowing out of the sixth valve. The second pressure gauge may refer to an instrument for measuring the pressure data of the external transmission pipeline. The target valve may refer to a valve with a fault among the first valve, the second valve, and the third valve. The fault state may refer to a faulty open state and a faulty closed state. The faulty open state means that the valve should normally be in a closed state, but is actually in an open state. The faulty closed state means that the valve should normally be in an open state, but is actually in a closed state. It should be noted that the fourth valve, the fifth valve, and the sixth valve may be manual valves or electric valves.

[0037] Specifically, Figure 2As shown, the fluid flowing out of the wellhead flows through the first pressure gauge to reach the on-site main road and the on-site branch road. The fluid of the on-site main road reaches the external transmission pipeline through the sixth valve and flows through the second pressure gauge. The fluid of the on-site branch road reaches the external transmission pipeline through the fourth valve, the magnetic resonance flowmeter and the fifth valve and flows through the second pressure gauge. If it is found that the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, the working state of the fourth valve and the fifth valve on the on-site branch road pipeline and the sixth valve on the on-site main road pipeline are continuously changed. Based on the first pressure gauge at the wellhead and the second pressure gauge on the external transmission pipeline, the temperature and pressure gauge and the pressure relief valve on the metering main road, the first valve, the second valve and the third valve in the magnetic resonance flowmeter are fault-detected, and the first valve, the second valve and the third valve with faults are determined as target valves, and the fault state corresponding to the target valve is determined. The fault detection of the flowmeter valve can be completed quickly without disassembling the pipeline, reducing manual participation.

[0038] The technical solution of the embodiment of the present invention is to measure the fluid flow rate and fluid components of the multiphase fluid generated at the wellhead through a magnetic resonance flowmeter located on the field branch pipeline. If the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the field branch pipeline, the sixth valve located on the field main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are detected for faults, and the target valve with faults and the fault state corresponding to the target valve are determined, thereby realizing rapid detection of flowmeter valve faults, reducing manual participation, and improving the efficiency of flowmeter valve fault detection, so that the faulty valve can be repaired in time, avoiding the problem of excessive stagnation of oil production due to valve failure, and greatly reducing the economic losses caused by stagnation of oil production.

[0039] Embodiment 2

[0040] Figure 3 This is a flow chart of a flow meter valve fault detection method provided in Embodiment 2 of the present invention. Based on the above embodiments, this embodiment describes in detail the specific determination process of flow meter valve fault detection when the magnetic resonance flow meter fails to measure the fluid flow rate. The explanations of the terms that are the same or corresponding to the above embodiments are not repeated here.

[0041] See also Figure 3 Another flow meter valve fault detection method provided in this embodiment specifically includes the following steps:

[0042] S210, based on the magnetic resonance flowmeter located on the field branch pipeline, the fluid flow rate and fluid composition of the multiphase fluid produced at the wellhead are measured.

[0043] S220. If the magnetic resonance flowmeter fails to measure the fluid flow rate, the current measurement state is switched to the flow measurement state, and based on the first pressure gauge at the wellhead, the second pressure gauge on the external transmission pipeline, the fourth valve and the fifth valve on the on-site branch pipeline, the sixth valve on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, fault detection is performed on the first valve, the second valve and the third valve to determine the faulty target valve and the fault state corresponding to the target valve.

[0044] The current measurement state may refer to the measurement state of the magnetic resonance flowmeter at the current moment. The flow measurement state may refer to the state in which the first valve and the third valve in the magnetic resonance flowmeter are open and the second valve is closed.

[0045] Specifically, Figure 4 As shown, if it is found that the magnetic resonance flowmeter fails to measure the fluid flow rate, the first valve and the third valve in the magnetic resonance flowmeter are controlled to open, and the second valve is closed, and the current measurement state of the magnetic resonance flowmeter is switched to the flow measurement state. By continuously changing the working state of the fourth valve and the fifth valve located on the field branch pipeline and the sixth valve located on the field main pipeline, based on the first pressure gauge located at the wellhead and the second pressure gauge located on the external transmission pipeline, the temperature and pressure gauge and the pressure relief valve located on the metering main road, the first valve, the second valve and the third valve in the magnetic resonance flowmeter are fault-detected, and the first valve, the second valve and the third valve with faults are determined as target valves, and the fault state corresponding to the target valve is determined. The fault detection of the flowmeter valve can be quickly completed when the fluid flow rate measurement fails, without disassembling the pipeline, reducing manual participation.

[0046] Exemplarily, "based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with fault and the fault state corresponding to the target valve" in S220 may include: obtaining the first pressure value of the first pressure gauge located at the wellhead and the second pressure value of the second pressure gauge located on the external transmission pipeline; if the difference between the first pressure value and the second pressure value is less than or equal to the preset difference, determining that the target valve with fault is the second valve, and determining that the fault state corresponding to the target valve is the faulty open state; if the difference between the first pressure value and the second pressure value is greater than the preset difference, determining that the second valve is in a normally closed state, and controlling the fourth valve and the fifth valve located on the on-site branch pipeline to be in a closed state, and the sixth valve located on the on-site main pipeline to be in an open state; controlling the pressure relief valve, the fourth valve and the fifth valve, and based on the pressure value change of the temperature and pressure gauge, performing fault detection on the first valve and the third valve to determine the target valve with fault and the fault state corresponding to the target valve.

[0047] The first pressure value may refer to a specific value of the pressure measured by the first pressure gauge. The second pressure value may refer to a specific value of the pressure measured by the second pressure gauge. The preset difference may refer to a difference between the first pressure value and the second pressure value that are preset for determining the state of the target valve.

[0048] Specifically, Figure 4 As shown, when the magnetic resonance flowmeter is in the flow measurement state, the first pressure value corresponding to the wellhead position measured by the first pressure gauge located at the wellhead and the second pressure value measured by the second pressure gauge located on the external transmission pipeline are obtained, and the difference between the first pressure value and the second pressure value is calculated. If the difference between the first pressure value and the second pressure value is less than or equal to the preset difference, it indicates that the second valve is in an open state, which is inconsistent with the fact that the second valve should be in a closed state when the magnetic resonance flowmeter is in the flow measurement state, then the second valve is determined to be a target valve with a fault, and the fault state corresponding to the target valve is determined to be a faulty open state. If the difference between the first pressure value and the second pressure value is greater than the preset difference, it indicates that the second valve is in a closed state, which is consistent with the fact that the second valve should be in a closed state when the magnetic resonance flowmeter is in the flow measurement state, then the second valve is determined to be in a normally closed state. The fourth valve and the fifth valve located on the on-site branch pipeline are controlled to be in a closed state, and the sixth valve located on the on-site main pipeline is in an open state, thereby ensuring normal production. The pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the pressure value change of the temperature and pressure gauge, the first valve and the third valve are fault detected to determine the faulty target valve and the fault state corresponding to the target valve.

[0049] Exemplarily, the pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the change in the pressure value of the thermostat, the first valve and the third valve are detected for faults, and the faulty target valve and the fault state corresponding to the target valve are determined, including: controlling the pressure relief valve to open, discharging the remaining fluid and then closing the pressure relief valve; controlling the fourth valve to open, and based on the change in the pressure value of the thermostat during the opening of the fourth valve, performing fault detection on the first valve; if there is no fault in the first valve, controlling the pressure relief valve to open, discharging the remaining fluid and then closing the pressure relief valve; controlling the fifth valve to open, and based on the change in the pressure value of the thermostat during the opening of the fifth valve, performing fault detection on the third valve.

[0050] Specifically, Figure 4 As shown, control the pressure relief valve to open, discharge the remaining fluid in the metering main circuit, and then close the pressure relief valve. Control the fourth valve to open slowly, and record the pressure value change of the thermometer during the opening of the fourth valve, and perform fault detection on the first valve based on the change of the thermometer pressure value. If there is no fault in the first valve, control the pressure relief valve to open, discharge the remaining fluid in the metering main circuit, and then close the pressure relief valve. Control the fourth valve to close, the fifth valve to open, and record the pressure value change of the thermometer during the opening of the fifth valve, and perform fault detection on the third valve based on the change of the thermometer pressure value.

[0051] Exemplarily, based on the change in pressure value of the thermometer and pressure gauge during the opening process of the fourth valve, fault detection is performed on the first valve, including: if the change in the pressure value of the thermometer and pressure gauge is that the pressure value remains unchanged, it is determined that the target valve with the fault is the first valve, and the fault state corresponding to the target valve is determined to be a faulty closed state; if the change in the pressure value of the thermometer and pressure gauge is that the pressure value continues to increase, it is determined that the first valve is in a normally open state, and there is no fault in the first valve.

[0052] Specifically, Figure 4 As shown, if the pressure value of the thermometer changes to remain unchanged, it means that no fluid has entered the metering main circuit, and the first valve is in a closed state, then the target valve with a fault is determined to be the first valve, and the fault state corresponding to the target valve is determined to be a faulty closed state. If the pressure value of the thermometer changes to increase, it means that fluid has entered the metering main circuit, and the first valve is in an open state, then it is determined that the first valve is in a normally open state, and there is no fault in the first valve. It is possible to detect flow meter valve faults without disassembly, thereby improving detection efficiency.

[0053] Exemplarily, based on the change in the pressure value of the thermostatic gauge during the opening process of the fifth valve, fault detection is performed on the third valve, including: if the change in the pressure value of the thermostatic gauge is that the pressure value remains unchanged, determining that the target valve with the fault is the third valve, and determining that the fault state corresponding to the target valve is the faulty closed state; if the change in the pressure value of the thermostatic gauge is that the pressure value continues to increase, determining that the third valve is in a normally open state, and there is no fault in the third valve.

[0054] Specifically, Figure 4 As shown, if the pressure value of the thermometer changes to remain unchanged, it means that no fluid has entered the metering main circuit, and the third valve is in a closed state, then the target valve with a fault is determined to be the third valve, and the fault state corresponding to the target valve is determined to be a faulty closed state. If the pressure value of the thermometer changes to increase, it means that fluid has entered the metering main circuit, and the third valve is in an open state, then the third valve is determined to be in a normally open state, and there is no fault in the third valve. It is possible to detect flow meter valve faults without disassembly, thereby improving detection efficiency.

[0055] According to the technical solution of the embodiment of the present invention, if the magnetic resonance flowmeter fails to measure the fluid flow rate, the current measurement state is switched to the flow measurement state, and based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, fault detection is performed on the first valve, the second valve and the third valve to determine the faulty target valve and the fault state corresponding to the target valve, thereby realizing flowmeter valve fault detection when the magnetic resonance flowmeter fails to measure the fluid flow rate, improving the efficiency of flowmeter valve fault detection, and timely repairing the faulty valve.

[0056] Embodiment 3

[0057] Figure 5 This is a flow chart of a flow meter valve fault detection method provided in Embodiment 3 of the present invention. Based on the above embodiments, this embodiment describes in detail the specific determination process of flow meter valve fault detection when the magnetic resonance flow meter fails to measure the fluid component. The explanations of the terms that are the same or corresponding to the above embodiments are not repeated here.

[0058] See also Figure 5 Another flow meter valve fault detection method provided in this embodiment specifically includes the following steps:

[0059] S310, based on the magnetic resonance flowmeter located on the field branch pipeline, the fluid flow rate and fluid composition of the multiphase fluid produced at the wellhead are measured.

[0060] S320. If the magnetic resonance flowmeter fails to measure the fluid component, the current measurement state is switched to the static measurement state, and based on the first pressure gauge at the wellhead, the second pressure gauge on the external transmission pipeline, the fourth valve and the fifth valve on the on-site branch pipeline, the sixth valve on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, fault detection is performed on the first valve, the second valve and the third valve to determine the target valve with the fault and the fault state corresponding to the target valve.

[0061] The static measurement state may refer to a state in which the first valve and the third valve in the magnetic resonance flowmeter are closed and the second valve is opened.

[0062] Specifically, Figure 6 As shown, if the magnetic resonance flowmeter fails to measure the fluid component, the first valve and the third valve in the magnetic resonance flowmeter are controlled to be closed, and the second valve is opened, and the current measurement state of the magnetic resonance flowmeter is switched to the flow measurement state. By continuously changing the working state of the fourth valve and the fifth valve located on the field branch pipeline and the sixth valve located on the field main pipeline, based on the first pressure gauge located at the wellhead and the second pressure gauge located on the external transmission pipeline, the temperature and pressure gauge and the pressure relief valve located on the metering main road, the first valve, the second valve and the third valve in the magnetic resonance flowmeter are fault-detected, and the first valve, the second valve and the third valve with faults are determined as target valves, and the fault state corresponding to the target valve is determined. The fault detection of the flowmeter valve can be quickly completed when the fluid flow rate measurement fails, without disassembling the pipeline, reducing manual participation.

[0063] Exemplarily, in S320, "when there is a fluid component measurement failure, based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault detected to determine the target valve with the fault and the fault state corresponding to the target valve" may include: obtaining a first pressure value of the first pressure gauge located at the wellhead and a second pressure value of the second pressure gauge located on the external transmission pipeline; if the difference between the first pressure value and the second pressure value is greater than or equal to the preset difference, determining that the target valve with the fault is the second valve, and determining that the fault state corresponding to the target valve is a fault closed state ... If the difference between the first pressure value and the second pressure value after the second valve is closed is less than the preset difference, it is determined that the second valve is in a normally open state and the second valve is controlled to be closed; if the difference between the first pressure value and the second pressure value after the second valve is closed is less than or equal to the preset difference, it is determined that the target valves with faults are the first valve and the third valve, and it is determined that the fault states corresponding to the target valves are all faulty open states; if the difference between the first pressure value and the second pressure value after the second valve is closed is greater than the preset difference, the fourth valve and the fifth valve located on the on-site branch pipeline are both controlled to be in a closed state, and the sixth valve located on the on-site main pipeline is in an open state; the pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the pressure value change of the thermometer, the first valve and the third valve are fault detected to determine the target valve with faults and the fault state corresponding to the target valve.

[0064] Specifically, Figure 6As shown, when the magnetic resonance flowmeter is in a static measurement state, the first pressure value corresponding to the wellhead position measured by the first pressure gauge located at the wellhead and the second pressure value of the second pressure gauge located on the external transmission pipeline are obtained. If the difference between the first pressure value corresponding to the first pressure gauge and the second pressure value corresponding to the second pressure gauge is greater than or equal to the preset difference, it indicates that the second valve is in a closed state, which is inconsistent with the fact that the second valve should be in an open state when the magnetic resonance flowmeter is in a static measurement state, then it is determined that the target valve with a fault is the second valve, and the fault state corresponding to the target valve is determined to be a faulty closed state. If the difference between the first pressure value and the second pressure value is less than the preset difference, it indicates that the second valve is in an open state, which is consistent with the fact that the second valve should be in an open state when the magnetic resonance flowmeter is in a static measurement state, then it is determined that the second valve is in a normally open state, and the second valve is controlled to be closed. If the difference between the first pressure value and the second pressure value after the second valve is closed is less than or equal to the preset difference, it means that the first valve and the third valve are open, which is inconsistent with the fact that the first valve and the third valve should be in the closed state when the magnetic resonance flowmeter is in the static measurement state. Then the first valve and the third valve are determined to be the target valves with faults, and the fault states corresponding to the target valves are determined to be the faulty open state. If the difference between the first pressure value and the second pressure value after the second valve is closed is greater than the preset difference, the fourth valve and the fifth valve on the on-site branch pipeline are controlled to be in the closed state, and the sixth valve on the on-site main pipeline is controlled to be in the open state to ensure normal production. The pressure relief valve, the fourth valve and the fifth valve are controlled, and the pressure value changes of the temperature and pressure gauge are recorded. The first valve and the third valve are fault-detected based on the pressure value changes of the temperature and pressure gauge to determine the target valve with faults and the fault state corresponding to the target valve.

[0065] Exemplarily, the pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the change in the pressure value of the thermostat, the first valve and the third valve are detected for faults, and the faulty target valve and the fault state corresponding to the target valve are determined, including: controlling the pressure relief valve to open, discharging the remaining fluid and then closing the pressure relief valve; controlling the fourth valve to open, and based on the change in the pressure value of the thermostat during the opening of the fourth valve, performing fault detection on the first valve; if there is no fault in the first valve, controlling the pressure relief valve to open, discharging the remaining fluid and then closing the pressure relief valve; controlling the fifth valve to open, and based on the change in the pressure value of the thermostat during the opening of the fifth valve, performing fault detection on the third valve.

[0066] Specifically, Figure 6As shown, control the pressure relief valve to open, discharge the remaining fluid in the metering main circuit, and then close the pressure relief valve. Control the fourth valve to open slowly, and record the pressure value change of the thermometer during the opening of the fourth valve, and perform fault detection on the first valve based on the pressure value change of the thermometer. If there is no fault in the first valve, control the pressure relief valve to open, discharge the remaining fluid in the metering main circuit, and then close the pressure relief valve. Control the fourth valve to close, the fifth valve to open, and record the pressure value change of the thermometer during the opening of the fifth valve, and perform fault detection on the third valve based on the pressure value change of the thermometer.

[0067] Exemplarily, the fourth valve is controlled to open, and based on the change in the pressure value of the thermostatic pressure gauge during the opening process of the fourth valve, fault detection is performed on the first valve, including: if the change in the pressure value of the thermostatic pressure gauge is that the pressure value continues to increase, it is determined that the target valve with a fault is the first valve, and the fault state corresponding to the target valve is determined to be a faulty open state; if the change in the pressure value of the thermostatic pressure gauge is that the pressure value remains unchanged, it is determined that the first valve is in a normally closed state, and there is no fault in the first valve.

[0068] Specifically, Figure 6 As shown, if the pressure value of the temperature and pressure gauge changes in a situation where the pressure value continues to increase, it means that fluid has entered the metering main circuit, and the first valve is in an open state, then it is determined that the target valve with a fault is the first valve, and the fault state corresponding to the target valve is determined to be a faulty open state. If the pressure value of the temperature and pressure gauge changes in a situation where the pressure value remains unchanged, it means that no fluid has entered the metering main circuit, and the first valve is in a closed state, then it is determined that the first valve is in a normally closed state, and there is no fault in the first valve.

[0069] Exemplarily, the fifth valve is controlled to open, and based on the change in the pressure value of the thermostatic pressure gauge during the opening process of the fifth valve, fault detection is performed on the third valve, including: if the change in the pressure value of the thermostatic pressure gauge is that the pressure value continues to increase, it is determined that the target valve with a fault is the third valve, and the fault state corresponding to the target valve is determined to be a faulty open state; if the change in the pressure value of the thermostatic pressure gauge is that the pressure value remains unchanged, it is determined that the third valve is in a normally closed state, and there is no fault in the third valve.

[0070] Specifically, Figure 6 As shown, if the pressure value of the temperature and pressure gauge changes in the pressure value is constantly increasing, it means that fluid has entered the metering main circuit, and the third valve is in the open state, then it is determined that the target valve with a fault is the third valve, and the fault state corresponding to the target valve is determined to be the faulty open state. If the pressure value of the temperature and pressure gauge changes in the pressure value remains unchanged, it means that no fluid has entered the metering main circuit, and the third valve is in the closed state, then it is determined that the third valve is in a normally closed state, and there is no fault in the third valve.

[0071] According to the technical solution of the embodiment of the present invention, if the magnetic resonance flowmeter fails to measure the fluid component, the current measurement state is switched to the static measurement state, and based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, fault detection is performed on the first valve, the second valve and the third valve, and the faulty target valve and the fault state corresponding to the target valve are determined, thereby realizing flowmeter valve fault detection when the magnetic resonance flowmeter fails to measure the fluid component, improving the efficiency of flowmeter valve fault detection, and timely repairing the faulty valve.

[0072] Embodiment 4

[0073] Figure 7 This is a schematic diagram of the structure of a pipeline ice blockage detection device provided in Embodiment 3 of the present invention. Figure 7 As shown, the device includes: a fluid measurement module 410 and a fault detection module 420 .

[0074] The fluid measurement module 410 is used to measure the fluid flow rate and fluid components of the multiphase fluid generated at the wellhead based on the magnetic resonance flowmeter located on the field branch pipeline, wherein the magnetic resonance flowmeter includes: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve located on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline;

[0075] The fault detection module 420 is used to perform fault detection on the first valve, the second valve and the third valve based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, if the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, and determine the target valve with the fault and the fault state corresponding to the target valve;

[0076] Among them, the fourth valve and the fifth valve are used to control the flow state of the on-site branch pipeline; the sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline.

[0077] The technical solution of this embodiment is to measure the fluid flow rate and fluid components of the multiphase fluid generated at the wellhead through a magnetic resonance flowmeter located on the field branch pipeline. If the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the field branch pipeline, the sixth valve located on the field main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with fault and the fault state corresponding to the target valve, thereby realizing rapid detection of flowmeter valve faults, reducing manual participation, and improving the efficiency of flowmeter valve fault detection, so that the faulty valve can be repaired in time, avoiding the problem of excessive stagnation of oil production due to valve failure, and greatly reducing the economic losses caused by stagnation of oil production.

[0078] Optionally, the fault detection module 420 includes:

[0079] a first fault state determination unit, configured to switch the current measurement state to a flow measurement state if the magnetic resonance flowmeter fails to measure the fluid flow rate, and to perform fault detection on the first valve, the second valve, and the third valve based on a first pressure gauge at a wellhead, a second pressure gauge on an external transmission pipeline, a fourth valve and a fifth valve on the on-site branch pipeline, a sixth valve on the on-site main pipeline, the temperature and pressure gauge, and the pressure relief valve, to determine a target valve with a fault and a fault state corresponding to the target valve;

[0080] The second fault state determination unit is used to switch the current measurement state to a static measurement state if the magnetic resonance flowmeter fails to measure the fluid component, and based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, perform fault detection on the first valve, the second valve and the third valve to determine the faulty target valve and the fault state corresponding to the target valve.

[0081] Optionally, the first fault state determination unit is specifically used to: obtain a first pressure value of a first pressure gauge located at the wellhead and a second pressure value of a second pressure gauge located on the external transmission pipeline; if the difference between the first pressure value and the second pressure value is less than or equal to a preset difference, determine that the target valve with a fault is the second valve, and determine that the fault state corresponding to the target valve is a faulty open state; if the difference between the first pressure value and the second pressure value is greater than the preset difference, determine that the second valve is in a normally closed state, and control the fourth valve and the fifth valve located on the on-site branch pipeline to be in a closed state, and the sixth valve located on the on-site main pipeline to be in an open state; control the pressure relief valve, the fourth valve and the fifth valve, and perform fault detection on the first valve and the third valve based on the pressure value change of the temperature and pressure gauge to determine the target valve with a fault and the fault state corresponding to the target valve.

[0082] Optionally, the first fault state determination unit is further specifically used to: control the pressure relief valve to open, discharge the remaining fluid and then close the pressure relief valve; control the fourth valve to open, and perform fault detection on the first valve based on the change in pressure value of the thermometer during the opening of the fourth valve; if there is no fault in the first valve, control the pressure relief valve to open, discharge the remaining fluid and then close the pressure relief valve; control the fifth valve to open, and perform fault detection on the third valve based on the change in pressure value of the thermometer during the opening of the fifth valve.

[0083] Optionally, the first fault state determination unit is also specifically used for: if the pressure value change of the temperature and pressure gauge is that the pressure value remains unchanged, determining that the target valve with the fault is the first valve, and determining that the fault state corresponding to the target valve is a faulty closed state; if the pressure value change of the temperature and pressure gauge is that the pressure value continues to increase, determining that the first valve is in a normally open state, and there is no fault in the first valve.

[0084] Optionally, the second fault state determination unit is specifically used to: obtain a first pressure value of a first pressure gauge located at the wellhead and a second pressure value of a second pressure gauge located on the external transmission pipeline; if the difference between the first pressure value and the second pressure value is greater than or equal to a preset difference, determine that the target valve with a fault is the second valve, and determine that the fault state corresponding to the target valve is a faulty closed state; if the difference between the first pressure value and the second pressure value is less than a preset difference, determine that the second valve is in a normally open state, and control the second valve to close; if the difference between the first pressure value and the second pressure value after the second valve is closed is less than or equal to the preset difference value, it is determined that the target valves with faults are the first valve and the third valve, and it is determined that the fault states corresponding to the target valves are all faulty open states; if the difference between the first pressure value and the second pressure value after the second valve is closed is greater than the preset difference, the fourth valve and the fifth valve on the on-site branch pipeline are controlled to be in a closed state, and the sixth valve on the on-site main pipeline is in an open state; the pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the pressure value change of the thermometer, the first valve and the third valve are fault detected to determine the target valve with faults and the fault states corresponding to the target valves.

[0085] Optionally, the second fault state determination unit is further specifically used to: control the pressure relief valve to open, discharge the remaining fluid and then close the pressure relief valve; control the fourth valve to open, and perform fault detection on the first valve based on the change in pressure value of the thermometer during the opening of the fourth valve; if there is no fault in the first valve, control the pressure relief valve to open, discharge the remaining fluid and then close the pressure relief valve; control the fifth valve to open, and perform fault detection on the third valve based on the change in pressure value of the thermometer during the opening of the fifth valve.

[0086] Optionally, the first fault state determination unit is also specifically used for: if the pressure value change of the temperature and pressure gauge is that the pressure value continues to increase, determining that the target valve with a fault is the first valve, and determining that the fault state corresponding to the target valve is a faulty open state; if the pressure value change of the temperature and pressure gauge is that the pressure value remains unchanged, determining that the first valve is in a normally closed state, and there is no fault in the first valve.

[0087] The flow meter valve fault detection device provided in the embodiment of the present invention can execute the flow meter valve fault detection synchronization method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0088] Figure 8This is a schematic diagram of the structure of a flow meter valve fault detection system provided by the fourth embodiment of the present invention. Figure 8 As shown, the system specifically includes: a processor 510, a magnetic resonance flowmeter 520 located on the on-site branch pipeline, a first pressure gauge 530 located at the wellhead, a second pressure gauge 540 located on the external transmission pipeline, a fourth valve 550 and a fifth valve 560 located on the on-site branch pipeline, and a sixth valve 570 located on the on-site main pipeline; wherein,

[0089] The magnetic resonance flowmeter 520 includes: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline; the fourth valve 550 and the fifth valve 560 are used to control the flow state of the field branch pipeline; the sixth valve 570 is used to control the flow state of the field main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the field branch pipeline or the field main pipeline; the processor 510 is used to implement the flowmeter valve fault detection method provided in any embodiment of the present invention.

[0090] The pipeline ice blockage detection system of this embodiment measures the fluid flow rate and fluid composition of the multiphase fluid generated at the wellhead through the magnetic resonance flowmeter located on the field branch pipeline. If the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid composition, based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the field branch pipeline, the sixth valve located on the field main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with fault and the fault state corresponding to the target valve, thereby realizing rapid detection of flowmeter valve faults, reducing manual participation, and improving the efficiency of flowmeter valve fault detection, so that the faulty valve can be repaired in time, avoiding the problem of excessive stagnation of oil production due to valve faults, and greatly reducing the economic losses caused by stagnation of oil production.

[0091] It should be understood by those skilled in the art that the modules or steps of the present invention described above can be implemented by a general-purpose computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, optionally, they can be implemented by a program code executable by a computer device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0092] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A flow meter valve fault detection method, characterized in that: include: Based on the magnetic resonance flowmeter located on the field branch pipeline, the multiphase fluid generated at the wellhead is measured for fluid flow rate and fluid component, wherein the magnetic resonance flowmeter comprises: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve located on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline; If the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, based on the first pressure gauge at the wellhead, the second pressure gauge on the external transmission pipeline, the fourth valve and the fifth valve on the on-site branch pipeline, the sixth valve on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with the fault and the fault state corresponding to the target valve; Among them, the fourth valve and the fifth valve are used to control the flow state of the on-site branch pipeline; the sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline.

2. The method according to claim 1, characterized in that If the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, based on the first pressure gauge at the wellhead, the second pressure gauge on the external transmission pipeline, the fourth valve and the fifth valve on the on-site branch pipeline, the sixth valve on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with the fault and the fault state corresponding to the target valve, including: If the magnetic resonance flowmeter fails to measure the fluid flow rate, the current measurement state is switched to the flow measurement state, and based on the first pressure gauge at the wellhead, the second pressure gauge on the external transmission pipeline, the fourth valve and the fifth valve on the on-site branch pipeline, the sixth valve on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with the fault and the fault state corresponding to the target valve; If the magnetic resonance flowmeter fails to measure the fluid component, the current measurement state is switched to a static measurement state, and based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, fault detection is performed on the first valve, the second valve and the third valve to determine the faulty target valve and the fault state corresponding to the target valve.

3. The method according to claim 2, characterized in that When there is a fluid flow rate measurement failure, based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with a fault and the fault state corresponding to the target valve, including: Obtain a first pressure value of a first pressure gauge located at a wellhead and a second pressure value of a second pressure gauge located on an external transmission pipeline; If the difference between the first pressure value and the second pressure value is less than or equal to a preset difference, determining that the target valve with a fault is the second valve, and determining that the fault state corresponding to the target valve is a fault-open state; If the difference between the first pressure value and the second pressure value is greater than a preset difference, it is determined that the second valve is in a normally closed state, and the fourth valve and the fifth valve on the on-site branch pipeline are controlled to be in a closed state, and the sixth valve on the on-site main pipeline is controlled to be in an open state; The pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the pressure value change of the temperature and pressure gauge, fault detection is performed on the first valve and the third valve to determine the faulty target valve and the fault state corresponding to the target valve.

4. The method according to claim 3, characterized in that The controlling of the pressure relief valve, the fourth valve and the fifth valve, and based on the pressure value change of the temperature and pressure gauge, performing fault detection on the first valve and the third valve, and determining a target valve with a fault and a fault state corresponding to the target valve, includes: Controlling the pressure relief valve to open, discharging the remaining fluid and then closing the pressure relief valve; Controlling the fourth valve to open, and performing fault detection on the first valve based on the pressure value change of the temperature and pressure gauge during the opening process of the fourth valve; If the first valve does not have a fault, control the pressure relief valve to open, discharge the remaining fluid, and then close the pressure relief valve; The fifth valve is controlled to open, and based on the change in the pressure value of the temperature and pressure gauge during the opening process of the fifth valve, fault detection is performed on the third valve.

5. The method according to claim 4, characterized in that The performing fault detection on the first valve based on the pressure value change of the temperature and pressure gauge during the opening process of the fourth valve includes: If the pressure value change of the temperature and pressure gauge is that the pressure value remains unchanged, it is determined that the target valve with a fault is the first valve, and the fault state corresponding to the target valve is determined to be a fault-closed state; If the pressure value of the temperature and pressure gauge changes in a condition that the pressure value continues to increase, it is determined that the first valve is in a normally open state and there is no fault in the first valve.

6. The method according to claim 2, characterized in that When there is a fluid component measurement failure, based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the field branch pipeline, the sixth valve located on the field main pipeline, the temperature and pressure gauge and the pressure relief valve, the first valve, the second valve and the third valve are fault-detected to determine the target valve with a fault and the fault state corresponding to the target valve, including: Obtain a first pressure value of a first pressure gauge located at a wellhead and a second pressure value of a second pressure gauge located on an external transmission pipeline; If the difference between the first pressure value and the second pressure value is greater than or equal to a preset difference, determining that the target valve with a fault is the second valve, and determining that the fault state corresponding to the target valve is a fault-closed state; If the difference between the first pressure value and the second pressure value is less than a preset difference, determining that the second valve is in a normally open state, and controlling the second valve to close; If the difference between the first pressure value and the second pressure value after the second valve is closed is less than or equal to a preset difference, it is determined that the target valves with faults are the first valve and the third valve, and it is determined that the fault states corresponding to the target valves are both fault-open states; If the difference between the first pressure value and the second pressure value after the second valve is closed is greater than a preset difference, the fourth valve and the fifth valve on the on-site branch pipeline are controlled to be in a closed state, and the sixth valve on the on-site main pipeline is controlled to be in an open state; The pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the pressure value change of the temperature and pressure gauge, fault detection is performed on the first valve and the third valve to determine the faulty target valve and the fault state corresponding to the target valve.

7. The method according to claim 6, characterized in that The pressure relief valve, the fourth valve and the fifth valve are controlled, and based on the pressure value change of the temperature and pressure gauge, the first valve and the third valve are fault detected to determine the target valve with a fault and the fault state corresponding to the target valve, including: Controlling the pressure relief valve to open, discharging the remaining fluid and then closing the pressure relief valve; Controlling the fourth valve to open, and performing fault detection on the first valve based on the pressure value change of the temperature and pressure gauge during the opening process of the fourth valve; If the first valve does not have a fault, control the pressure relief valve to open, discharge the remaining fluid, and then close the pressure relief valve; The fifth valve is controlled to open, and based on the change in the pressure value of the temperature and pressure gauge during the opening process of the fifth valve, fault detection is performed on the third valve.

8. The method according to claim 7, characterized in that Controlling the fourth valve to open, and performing fault detection on the first valve based on a change in the pressure value of the temperature and pressure gauge during the opening of the fourth valve, comprising: If the pressure value of the temperature and pressure gauge changes in a condition that the pressure value continues to increase, it is determined that the target valve with a fault is the first valve, and it is determined that the fault state corresponding to the target valve is a fault-open state; If the pressure value of the temperature and pressure gauge changes in a condition that the pressure value remains unchanged, it is determined that the first valve is in a normally closed state and there is no fault in the first valve.

9. A flow meter valve fault detection device, characterized in that: include: A fluid measurement module, used for measuring the fluid flow rate and fluid composition of the multiphase fluid generated at the wellhead based on a magnetic resonance flowmeter located on a field branch pipeline, wherein the magnetic resonance flowmeter comprises: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve located on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline; a fault detection module, configured to, if the magnetic resonance flowmeter fails to measure the fluid flow rate or the fluid component, perform fault detection on the first valve, the second valve and the third valve based on the first pressure gauge located at the wellhead, the second pressure gauge located on the external transmission pipeline, the fourth valve and the fifth valve located on the on-site branch pipeline, the sixth valve located on the on-site main pipeline, the temperature and pressure gauge and the pressure relief valve, and determine the target valve with the fault and the fault state corresponding to the target valve; Among them, the fourth valve and the fifth valve are used to control the flow state of the on-site branch pipeline; the sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline.

10. A flow meter valve fault detection system, characterized in that: The system includes: a processor, a magnetic resonance flowmeter located on the on-site branch pipeline, a first pressure gauge located at the wellhead, a second pressure gauge located on the external transmission pipeline, a fourth valve and a fifth valve located on the on-site branch pipeline, and a sixth valve located on the on-site main pipeline; wherein, The magnetic resonance flowmeter comprises: a metering main pipeline, a metering branch pipeline, a first valve, a magnetic resonance probe, a temperature and pressure gauge, a pressure relief valve and a third valve arranged in sequence on the metering main pipeline, and a second valve on the metering branch pipeline; the first valve and the third valve are used to control the flow state of the metering main pipeline, and the second valve is used to control the flow state of the metering branch pipeline; The fourth valve and the fifth valve are used to control the flow state of the on-site branch pipeline; the sixth valve is used to control the flow state of the on-site main pipeline; the multiphase fluid generated from the wellhead flows into the external transmission pipeline through the on-site branch pipeline or the on-site main pipeline; The processor is used to implement the flow meter valve fault detection method according to any one of claims 1-8.

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