CN-116517513-B - Water injection well fault handling and control method based on RTU edge calculation

CN116517513BCN 116517513 BCN116517513 BCN 116517513BCN-116517513-B

Abstract

The invention relates to the technical field of oil extraction, in particular to a water injection well fault handling and fine control method based on RTU edge calculation, which comprises the following steps that 1) a cloud acquires a water injection range and a diagnosis control model and pushes the water injection range and the diagnosis control model to an RTU of a water distribution room; the method comprises the steps of 2) judging water injection conditions according to pump pressure of a water injection well, oil pressure of the water injection well and real-time water injection flow data acquired by current sensors, carrying out perforation diagnosis and treatment of a water injection well pipeline if pressure abnormal fluctuation is diagnosed, carrying out water injection well coincidence rate management and control treatment if pressure abnormal fluctuation is not detected, 3) carrying out perforation diagnosis and treatment of the water injection well pipeline, and 4) carrying out water injection pipeline abnormality diagnosis, judging burst perforation problems and timely treatment on the basis of water injection pipeline pressure data acquired in real time, thereby greatly improving water injection well fault treatment efficiency and effectively solving the problem of serious delay of fault discovery treatment of an oil field in water injection management.

Inventors

ZHANG LITING
ZENG PENG
LI SHICHAO
SHI SHUO
ZHENG DONGLIANG
LING XIAO

Assignees

中国科学院沈阳自动化研究所

Dates

Publication Date: 20260505
Application Date: 20220120

Claims (6)

1. The water injection well fault handling and controlling method based on RTU edge calculation is characterized by comprising the following steps: 1) The cloud acquires a water injection range and a diagnosis control model, pushing the water to the RTU of the water distribution room; 2) According to the pump pressure of the water injection well, the oil pressure of the water injection well and the real-time water injection flow data acquired by the current sensor, the RTU of the water distribution room judges the water injection condition according to the water injection range, if the abnormal pressure fluctuation is diagnosed, the perforation diagnosis and treatment of the pipeline of the water injection well are executed, and if the abnormal pressure fluctuation is not detected, the control treatment of the coincidence rate of the water injection well is executed; 3) Diagnosing and processing pipeline perforation of the water injection well, namely performing abnormality diagnosis on the water injection pipeline according to the collected pump pressure and oil pressure of the water injection well, judging the problem of pipeline perforation, controlling the opening of a control valve on a corresponding pipeline by controlling a flow controller, adjusting the water injection quantity, and reporting the problem to the cloud; the water injection well pipeline perforation diagnosis and treatment method comprises the following steps: step 1, analyzing historical data of pump pressure, oil pressure and water injection flow of a water injection well through a cloud end, and determining a pump pressure fluctuation threshold value, an oil pressure fluctuation threshold value and a water injection flow lower limit value; Step 2, collecting the pump pressure and oil pressure of the water injection well in real time, and uploading the pump pressure and oil pressure to a water distribution room RTU; Step 3, the RTU of the water distribution room judges whether the pumping pressure is smaller than the pumping pressure fluctuation threshold value, if the pumping pressure is smaller than the pumping pressure fluctuation threshold value, the water injection manifold pipeline is diagnosed as perforation, and the step 5 is executed; Step4, judging whether the oil pressure is smaller than an oil pressure fluctuation threshold value, if so, diagnosing that the water injection branch pipeline is perforated, and executing step 6; Step 5, comparing the oil pressure of the current water injection well with the pump pressure of the water injection well, and reporting the water injection pipeline problem and the disposal operation to the cloud; step 6, the RTU of the water distribution room adjusts the water injection quantity to the lower limit value of the water injection quantity by controlling a flow controller, and reports the problem of a water injection pipeline and the treatment operation to the cloud; 4) The water injection well coincidence rate management and control processing is carried out, wherein water injection well debugging data pushed by a cloud end are taken as adjustment basis, water injection qualification rate and water injection coincidence rate of the water injection well are judged according to collected real-time water injection flow data and oil pressure data of the water injection well, a control valve opening on a corresponding pipeline is controlled by a control flow controller, water injection quantity is adjusted, water injection data expiration or critical conditions are timely reported, and operation of adjusting the water injection quantity is reported to the cloud end; the water injection well coincidence rate control processing comprises the following steps: (1) Acquiring a water injection constant pressure range [ P 1 ,P 2 ], a quantitative range [ Q 1 ,Q 2 ] and water quantity ranges [ Qa, qb ] meeting water injection coincidence rate under different water injection pressures through debugging data by a cloud, and pushing the water quantity ranges to a water distribution room RTU; (2) Collecting water injection flow data Q of a water injection well and water injection pressure P of the water injection well, uploading to a RTU of a water distribution room; (3) The RTU of the water distribution room judges the supercritical state of the oil pressure and the water injection flow data of the water injection well, if at least one state is in the supercritical state at present, the pressure supercritical state or the water injection flow supercritical state is reported to the cloud end; the supercritical state judgment is specifically as follows: If the oil pressure of the water injection well is not in the water injection constant pressure range [ P1, P2], namely P < P1 or P > P2, the pressure is in a supercritical state; if the water injection quantity is not in the water injection quantitative range [ Q1, Q2], namely Q < Q1 or Q > Q2, the water injection quantity is in a supercritical state; (4) The water injection coincidence rate judgment is carried out, the RTU of the water distribution room adjusts the water injection quantity of the water injection well according to different working condition states through the flow controller to realize the control of the water injection well, the water injection coincidence rate grade is set according to the debugging data acquired by the cloud, the water injection quantity of the water injection well is further adjusted according to the water injection coincidence rate grade so as to improve the water injection coincidence rate, and the step (5) is executed after the water injection quantity of the water injection well is adjusted; (5) Correcting the water injection quantity according to the fluctuation error coincidence table of the tri-level card; (6) And reporting the water injection treatment operation to the cloud.
2. The RTU edge calculation based water injection well fault handling and control method of claim 1, wherein the obtaining a water injection range and a diagnostic control model includes diagnosing a fault and a water injection range corresponding thereto.
3. The method for fault handling and control of a water injection well based on RTU edge calculation according to claim 1, wherein the step 5 specifically comprises: when the pumping pressure of the water injection well is larger than the oil pressure of the water injection well, the current state is kept and is not adjusted; When the pump pressure of the water injection well is equal to the oil pressure of the water injection well, the RTU of the water distribution room adjusts the valve opening of the control valve on the pipeline through the flow controller, so that the water injection quantity is reduced; when the pump pressure is smaller than the oil pressure, the RTU of the water distribution room adjusts the water injection quantity to the lower limit value of the water injection quantity through the flow controller.
4. The method for handling and controlling the fault of the water injection well based on the RTU edge calculation of claim 1, wherein the determining the water injection coincidence rate specifically includes: if the water injection quantity meets the set optimal water quantity control range of the water injection coincidence rate under the current water injection pressure, the current production state is maintained; If the water injection quantity exceeds the water quantity control range meeting the water injection coincidence rate or is in the water quantity range meeting the water injection coincidence rate requirement under the current water injection pressure, but is in a non-optimal control state, the water injection quantity of the water well is adjusted according to the working condition states of different water injection coincidence rates, so that the water injection quantity control of the water injection well is realized.
5. The method for fault handling and control of a water injection well based on RTU edge calculation according to claim 4, wherein if the water injection quantity exceeds the water quantity range meeting the water injection compliance rate requirement under the current water injection pressure, specifically: If the current water injection quantity is lower than the water injection coincidence rate water quantity lower limit value Qa under the current pressure, the RTU of the water distribution room regulates the valve opening of a control valve on a corresponding pipeline through a flow controller, and adjusts the water injection quantity to the water injection coincidence rate water quantity lower limit value Qa under the current pressure; If the current water injection quantity is higher than the upper limit value Qb of the water meeting rate under the current pressure, the RTU of the water distribution room adjusts the valve opening of the control valve on the corresponding pipeline by the flow controller, and adjusts the water injection quantity to the upper limit value Qb of the water meeting rate under the current pressure.
6. The method for fault handling and control of a water injection well based on RTU edge calculation according to claim 4, wherein if the water injection quantity is in a state that the water injection compliance rate is satisfied but is not optimal, adjusting the water injection well injection quantity according to different water injection compliance rate working conditions, specifically: When the water injection quantity meets the water quantity range of the water injection compliance rate requirement, but in a non-optimal control state, judging the compliance rate grade of the water injection quantity in the current state, and making the following adjustment: if the current water injection pressure is lower, if the current water injection coincidence rate grade is 1, the current state production is kept; A. If the current water injection coincidence rate level is 2, judging whether the water injection coincidence rate level 2 is the optimal coincidence rate level under the set current water injection pressure; if the current state is the optimal level, the current state production is maintained; If the water injection flow is at a non-optimal level, further judging the relation between the current water injection flow and the water injection range of the water injection coincidence rate level 1; If the current water injection quantity is lower than the lower limit water quantity of the water injection coincidence rate grade 1 under the current pressure, the RTU of the water distribution room regulates the valve opening of a control valve on a pipeline through a flow controller, and adjusts the water injection quantity to the lower limit water injection quantity of the water injection coincidence rate grade 1 under the current pressure; If the current water injection quantity is higher than the upper limit water injection quantity of the water injection coincidence rate grade 1 under the current pressure, the RTU of the water distribution room adjusts the valve opening of the control valve on the pipeline by the flow controller, and adjusts the water injection quantity to the upper limit water injection quantity of the water injection coincidence rate grade 1 under the current pressure; B. judging whether the water injection coincidence rate grade 3 is the optimal coincidence rate grade under the current water injection pressure; if the current state is the optimal level, the current state production is maintained; If the level is not optimal, determining the level of the upper-level coincidence rate in the current state, and further judging the relation between the current water injection flow and the water injection range of the upper-level coincidence rate; If the current water injection quantity is lower than the lower limit water quantity of the upper-level coincidence rate under the current pressure, the RTU of the water distribution room adjusts the opening of a control valve on a pipeline to adjust the water injection quantity to the lower limit water quantity of the upper-level coincidence rate under the current pressure through a flow controller; if the current water injection quantity is higher than the upper limit water quantity of the upper-level coincidence rate under the current pressure, the RTU of the water distribution room adjusts the valve opening of a control valve on a pipeline through a flow controller, and adjusts the water injection quantity to the upper limit water quantity of the upper-level coincidence rate under the current pressure; C. if the current water injection coincidence rate grade is 0, determining the water injection coincidence rate grade of the upper stage under the current water injection pressure, and further judging the relation between the current water injection flow and the water injection range of the upper stage coincidence rate; If the current water injection quantity is lower than the lower limit water quantity of the upper-level coincidence rate under the current pressure, the water distribution room adjusts the opening of a control valve on a pipeline by a flow controller, and the water injection quantity is adjusted to the lower limit water quantity of the upper-level coincidence rate under the current pressure; If the current water injection quantity is higher than the upper limit water quantity of the upper-level coincidence rate under the current pressure, the RTU of the water distribution room adjusts the opening of a control valve on a pipeline by a flow controller, and adjusts the water injection quantity to the upper limit water quantity of the upper-level coincidence rate under the current pressure.

Description

Water injection well fault handling and control method based on RTU edge calculation Technical Field The invention relates to the technical field of oil extraction, in particular to a water injection well fault handling and fine control method based on RTU edge calculation. Background In recent years, various large oil fields in China are speeded up to promote the informatization construction of oil and gas production business taking the networking of oil and gas production products as core contents. Along with popularization of the oil field internet of things and wide use of oil field intelligent equipment and sensors, real-time perception data are increased rapidly, a large number of data transmission causes blockage of a transmission channel, an existing cloud-based oil and gas production internet of things system is seriously dependent on a network in a control process, production interruption is inevitably caused when the network is interrupted, and great hidden danger is brought to safe production of an oil field. At present, in the aspect of water injection management, the oil field has serious fault discovery processing lag of a water injection well, the water injection quantity is not adjusted timely, fine control of the water injection well is difficult to realize, the instantaneous water quantity fluctuates within the range of +/-20% of a water injection allocation scheme and can meet the water injection qualification rate requirement, but along with the change of water injection pressure, the on-site instantaneous water quantity cannot meet the water injection qualification rate requirement, and the proper instantaneous water quantity is required to be further selected according to the layered well debugging data. Disclosure of Invention Aiming at the technical defects, the invention provides a water injection well fine control method based on RTU edge calculation. According to the method, the water injection range and the diagnosis control model calculated by the debugging data are pushed to the intelligent module at the edge end through the cloud end, the water injection condition is autonomously judged according to the production data acquired by the current sensor, the water injection well is intelligently regulated and controlled, the problem of the water well is timely reported, and accurate and stable water injection is realized. The technical scheme adopted by the invention for realizing the purpose is that the water injection well fault handling and controlling method based on RTU edge calculation comprises the following steps: 1) The cloud acquires a water injection range and a diagnosis control model, pushing the water to the RTU of the water distribution room; 2) According to the pump pressure of the water injection well, the oil pressure of the water injection well and the real-time water injection flow data acquired by the current sensor, the RTU of the water distribution room judges the water injection condition according to the water injection range, if the abnormal pressure fluctuation is diagnosed, the perforation diagnosis and treatment of the pipeline of the water injection well are executed, and if the abnormal pressure fluctuation is not detected, the control treatment of the coincidence rate of the water injection well is executed; 3) Diagnosing and processing pipeline perforation of the water injection well, namely performing abnormality diagnosis on the water injection pipeline according to the collected pump pressure and oil pressure of the water injection well, judging the pipeline perforation problem, controlling the opening of a control valve on a corresponding pipeline by controlling a high-pressure flow meter, adjusting the water injection quantity, and reporting the problem to the cloud; 4) And the water injection well coincidence rate control processing is to judge the water injection qualification rate and the water injection coincidence rate of the water injection well according to the collected real-time water injection flow data and the oil pressure data of the water injection well by taking the water injection well debugging data pushed by the cloud as adjustment basis, control the opening of a control valve on a corresponding pipeline by controlling a high-pressure flow meter, adjust the water injection quantity, report the expiration or critical condition of the water injection data in time and report the operation of adjusting the water injection quantity to the cloud. The water filling range and the diagnosis control model are obtained, and the diagnosis control model comprises diagnosis faults and the water filling range corresponding to the diagnosis faults. The water injection well pipeline perforation diagnosis and treatment method comprises the following steps: step 1, analyzing historical data of pump pressure, oil pressure and water injection flow of a water injection well through a cloud end, and determining a pump pressure fluctuation threshold