Innovation and Application of Intelligent Injection & Production and Remote Monitoring Technology in Offshore Oilfields

As the development of major offshore oilfields enter the mid to late stage, the workload of platform operations gradually increases. Conventional injection and production technology has low efficiency in wire testing and adjustment, making it difficult to meet the demand of efficient reservoir development. In view of the above issues, and combining the characteristics of large well deviation, large flow rate and small diameter of oil and water wells in Bohai oilfield, the whole set of data communication device is integrated into the downhole intelligent working cylinder through the design of mechanical structure, flowmeter, circuit composition and seal protection, and real-time communication is established with the ground control system by means of a single-core cable, realizing real-time reading and efficient regulation of downhole stratified data such as temperature, pressure and flow rate in platform control center. On this basis, through the further research and development of land terminal monitoring system, ultimately achieving remote monitoring and control of oil and water wells on offshore platforms, allowing reservoir engineers to have access to first-hand on-site information in the office. The test results show that the technology is not limited by well deviation and the number of injection and production layers, and the efficiency of testing and adjustment is improved by 96% compared to the conventional separate injection and production technology. The maximum flow rate of a single layer can reach 800m3/d, which can meet the requirements of large flow rate and small diameter in Bohai Oilfield. Up to now, the cable-control intelligent injection and production technology has been applied to over 180 wells in Bohai Oilfield, greatly improving the various indicators of fine water injection and oil stability and water control, providing strong technical support for promoting the intelligent and digital process and the construction of intelligent oilfield in Bohai oilfield.