Study on the Deep Profile Control Technology of the Overall Block in P Reservoir

For exploring effective water-control and oil-increasing technologies in P oil layer of mid-high water-cut stage, we carried out laboratory and field experiments of deep profile control. This paper optimized trial well block by reservoir numerical simulation, and carried out indoor natural core flooding experiment under simulated field conditions. The results show that the plugging ratio of water-expanded particles/multiplex complex gel system with best effect can get 98%, and the oil recovery could raise about 4.2% by multi-slugs injection. After the experiment, the average injection pressure of the test well rose by 7.5 MPa, the average moisture content of connected oil wells decreased by 14.6%, Cumulative oil-increase reached 1450t that year.