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杏河区位于杏河油藏中部,属多油层叠合区,长6油层组自下而上可分为长63、长62、长611-3、长611-2、长611-1、长4+5六个小层。主力油层长61平均有效厚度17.0m,平均含油饱和度62.3%,分为长611-1、长611-2、长611-3、长612四个小层。同时开采两个油层以上的开发井占到总井数的56.4%左右,属典型的多油层开发区块,低含水阶段采油速度在0.9%以上,整体开发效果较好。随着开发时间延长,由于储层非均质性的影响,层间及平面矛盾凸显,本文主要是针对杏河区近年来在多油层开发中的开发政策及效果进行分析总结,为下一步杏河多油层开发提供依据。
Xinghe District is located in the middle part of Xinghe Reservoir and belongs to the multi-reservoir superimposed area. The Chang 6 reservoir can be divided into long 63, long 62, long 611-3, long 611-2, long 611-1, long 4 + 5 six small layers. The main reservoir length 61 average effective thickness of 17.0m, the average oil saturation of 62.3%, divided into long 611-1, long 611-2, long 611-3, long 612 four small layers. At the same time, two development wells with more than two oil layers are exploited, accounting for 56.4% of the total number of wells. It is a typical multi-layer development block with oil extraction rate of 0.9% or more in low water cut stage and good overall development effect. With the development time prolonging, due to the influence of reservoir heterogeneity, the contradiction between layers and planes is prominent. This paper mainly analyzes and summarizes the development policies and effects of Xinghe District in multi-layer development in recent years. As the next step, River multi-reservoir development to provide the basis.