Cloud-Edge Combination: A Novel Intelligent Intermittent Pumping Optimization and Control Method for Tight Oil Wells

Abstract

Abstract More than 100,000 oil wells with liquid production less than five cubic meters per day in the target company will be converted to intermittent pumping by the end of 2025. That has a broad application prospect. In order to avoid network delay, improve pumping efficiency and realize unattended operation, an intelligent intermittent pumping optimization and control method based on cloud-edge combination is proposed. Firstly, intelligent edge modules with data acquisition and transmission, analysis and calculation and automatic control were configured into the intelligent pumping cabinets. An evaluation model of pumping effect aiming at stable production and minimum energy consumption was embedded into the intelligent edge module. Secondly, an intelligent management and control cloud platform for intermittent pumping wells was built. By using the production big data of intermittent pumping wells, a cloud prediction model of the optimal intermittent pumping scheme was built so as to provide a plan for each single well. In the execution stage, the cloud prediction model of the intermittent pumping system is used to formulate a one-day intermittent pumping scheme for every single well, and the optimized scheme signal will be sent to the edge module from the cloud. The edge module executes the corresponding intermittent pumping system according to the cloud order and monitors the intermittent pumping effect through the effect evaluation model by analyzing the real time production data. If the output and energy-saving effect meet the expected indicators, the optimized one-day scheme will be carried out at the edge until a new optimized scheme signal comes from the cloud 24 hours later. Otherwise, the pumping scheme will be switched to the power frequency mode and edge module will feed back the abnormal data to the cloud. After receiving new instructions from the cloud, the edge module will switch the pumping mode from power frequency mode to intermittent mode again. This technology has been applied into 2000 wells in two oilfields in China with a power saving rate of more than 30%. The joint control method of cloud-edge combination avoiding negative effect caused by network delay, basically realizes the unattended operation for intermittent pumping wells, greatly improves the management efficiency, and highly promotes the intelligent construction of the oilfield.