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正南东营组开发到了中高含水期,由于油层的非均质性,导致了平面、层间、层内吸水状况的不均匀,从而未达到应有的注水效果,主流线水淹程度高,分流线水淹程度较低。剩余储量分布零散,油藏层间、层内、平面矛盾十分突出,综合含水不断上升,由于井网较完善,层间调整难度大,因此在正南东营组开展了以水井调配为主控水稳油措施,进行了各类周期注水方式的探讨,取得了一定的成效。
Due to the heterogeneity of the oil layer, the Dongnan Formation in the southern part of the South China Sea has been developed to a high water cut stage. As a result of the heterogeneity of the oil layer, uneven water absorption occurs in the plane, the interlayer and the inner layer, thus failing to achieve the proper water injection effect. Streamline flooding is low. The remaining reserves are scattered, the contradictions between layers, layers and planes in the reservoirs are very prominent, and the integrated water content is constantly rising. Due to the well pattern and the difficulty of interlayer adjustment, Stable oil measures, carried out various types of periodic water injection methods, and achieved some results.