Physical Simulation Experimental Study on Performance Evaluation of Water Control Completion Technology in Heterogeneous Reservoirs

The water control completion technology, as an efficient and stable oil and water control technology, has been widely used in offshore oil fields in China. In response to the diversity of water control completion measures and tools, which leads to unclear matching between process measures and reservoir characteristics, and incomplete indoor experimental evaluation methods, a full-size physical simulation evaluation experimental device for water control completion tubing has been designed. This device is capable of simulating stable oil and water flow by considering reservoir heterogeneity, oil-water two-phase mixing characteristics, segmented sealing, and full-size control water pipe columns. At the same time, an evaluation method for indoor experimental water control measures based on water breakthrough time and moisture content changes was developed in conjunction with experimental equipment. The performance of three different types of AICD valves was compared using experimental equipment. The simulation experiment results of heterogeneous reservoirs show that in low viscosity oil (47 cP) environment, the 2 mm channel type AICD valve has the best comprehensive performance, with a waterless oil recovery period of 86 s and a 15.8% increase in oil-water ratio compared to the floating plate type; Under high viscosity oil (130 cP) conditions, the breakthrough time of the 3 mm channel type AICD valve is extended to 81 s, and the oil-water ratio is increased by 12% -18% compared to other types. The article proposes a physical simulation method for evaluating the segmented water control performance of full-size water control pipe columns, which realizes the physical simulation of indoor full-size water control measures and provides technical support for the application of water control completion technology.