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断块油田投入开发的初期,一般具有较高的生产能力。但是很难做到较长时间的稳产。主要原因是断块面积比较小,周围有断层遮挡,同时陆相沉积岩变化大,初期开发井网对油层适应性较差,储量有效动用程度低所致。综合调整就是在初期开发井网的基础上,根据对油层开发中暴露出问题的认识,进行以断块为单元的综合措施,延长油田稳产期,不断提高水驱采收率。大港油田近四年的综合调整结果,年产油量综合递减由20％降为10.5％,证明这种做法是行之有效的。
The initial stage of fault block oilfield investment and development, generally has a high production capacity. However, it is difficult to achieve long-term stable production. The main reason is that the area of fault block is relatively small with fault occlusion around, meanwhile the variation of continental sedimentary rock is large. The initial development well pattern has poor adaptability to reservoir and low effective utilization of reserves. The comprehensive adjustment is based on the initial development of the well pattern. Based on the understanding of the problems exposed in the reservoir development, comprehensive measures based on fault blocks are taken to prolong the stable production period of the oilfield and continuously improve the waterflood recovery rate. As a result of the comprehensive adjustment of Dagang Oilfield in recent four years, the annual decrease in oil production was reduced from 20% to 10.5%, proving that this approach is effective.