杏四～六面积北区块一次加密井网层系互换可行性研究

大庆油田长垣水驱已进入特高含水期开发阶段，剩余油分布高度零散，但水驱产量仍占主导地位，在目前水驱开发井网密度较大的情况下，仅依靠常规的调整挖潜措施改善开发效果的难度较大。通过对大庆油田杏四～六面积北块一次加密井网开发现状、存在问题及油层动用状况进行深入分析，搞清了区块各类油层目前剩余油的分布状况，确定了一次加密井网两套层系（萨尔图、葡14及以下）互换进行二次开发的可行性，为下步调整挖潜提供了有利依据。

Research on the feasibility of layer system exchange of the primary infill well pattern in the north of the Xing4-6 block

The Placantieline water flooding of Daqing oilfield has entered into the extra-high water cut development phase with highly scattered remaining oil, but water flooding production still dominates. Currently, considering the high density of water flood- ing development well pattern, it is too difficult to merely rely on conventional adjustment and tapping potential measures to improve the development effects. Through the research on the current development situation and existing problems and producing situation of the primary infill well pattern in the north of the xing4-6 block of Daqing oi]ficld, this paper found the remaining oil distribution of various reservoirs and determined the redevelopment feasibility of double layer systems （Saertu oil layer and the P 1 4 and the fol- lowing oil layers） exchange of the primary infill well pattern, which could provide favourable references for the next operation of ad- justment and tapping potential.