单元间夹层分布对二次射孔井开发效果的影响

Effect of Interlayer Growth between Units on the Reperforated Wells

油田采用聚驱开发时 ,由于原水驱时主力油层含水较高 ,为了在注聚合物前的空白水驱阶段提高生产经济效益 ,对高含水主力油层的聚合物油井在完井时不射开 ,而在注聚合物之后再补孔 ,即进行二次射孔开发。大庆萨中开发区中区东部及东区在聚合物驱前的空白水驱阶段采用二次射孔完井方式开发 ,共有 33口聚合物油井采用二次射孔方式完井 ,但效果不理想。为弄清原因 ,根据 2区块内12 0 0多口井电测资料 ,绘制了 2区块葡一组单元间夹层图 ,对影响二次射孔开发效果的单元间隔层发育状况进行了分析 ,结果发现二次射孔井开发效果受单元间夹层发育程度控制 。

Since the development of the reperforated wells in the east and central east parts is not ideal enough,this paper draws two interbed maps of PuI2 blocks to analyze its reason.The result shows that the development of the reperforated wells is closely relative to the interbedded properties, that is the interbedded development distribution is consistent to the distribution of interlayer water breakthrough in space. This useful acknowledgement provides some importance to the reperforations.