Evaluation Of The Exploitation Results Of Well Pattern Infilling About Pu Taohua Oil Zones In The East Of Daqing Oilfields

After many years of adjustment of water flooding, the Pu taohua oil zone in the east of Daqing oilfield has been entering in middle to high water cut stage and the water flooded of sand body is relatively serious. But it is more difficult to inject and product, has a higher water injection pressure and lower producing degree in the edge of the sand body or the area where the formation condition is relatively poor. Subject to small size sand body impact, a lot of problems exposed, such as well pattern adaptability and a higher proportion of single-way connection. So it is more difficult to improve the oilfield development effect by general injection.Based on remaining oil description technique and development index prediction method, the thesis study on the sand body geometry, pattern of remaining oil distribution, water out behavior of the blocks that have implemented well pattern infilling and injection-production system adjustment. Study and summarize the differences in moisture content of the blocks that take the different way of well pattern infilling and compare the moisture content of the blocks now with that before. Predict the block's recovery factor by Water drive curve. Set up a production decline analysis model and analyze the production decline rule of s132 block after well pattern infilling. Analyze the change of the block's water injection pressure and reservoir pressure before and after well pattern infilling. According to the research, summary effect of well pattern infilling in recent years, study on the effective measures and adjustment methods in order to slow production decline after well pattern infilling. Determine a reasonable adjustment principle of encryption and the principle of injection-production system. Analyze and evaluation the next step adjustment potential of the block.It provides theoretical support and technical guidance of well pattern infilling for Pu taohua oil zones in Daqing oilfields. And it is very necessary to improve the development effect of Pu taohua oil zones further.