Abstract: Aiming at the problems such as the large decline in water flooding production, the poor utilization of reservoirs, and the low formation pressure in the development of North First and Second Section West, the potential of well pattern adjustment in this area was studied. Combined with several reasons that affect the development effect of the block, it is analyzed that it is difficult to effectively improve the overall development status of the block by relying only on regular dynamic adjustment measures. Through the implementation of layered well pattern adjustment, the daily production volume of the entire area is increased by 5 640 t and the daily oil production is increased by 197 t. The water content was basically stable, the oil production rate rose to 0.60%, the flow pressure subsidence was restored, and the overall development of the block was effectively improved. As of August 2017, it has accumulatively increased oil by 20.5×104 t, and it is expected to increase oil recovery by more than 2.0 percentage points. Well network encryption and subdivision layer system adjustments have achieved significant effects, which solved the problem of poor level of use and improved the ultimate recovery rate.

Key words: Layered well pattern, Optimize adjustment, Application analysis

摘要： 针对北一、二排西开发中出现的水驱产量下降幅度较大、油层动用状况较差、地层压力较低等问题，对该区块层系井网调整潜力进行了研究。结合影响区块开发效果的几点原因，分析认为仅依靠常规的动态调整措施难以有效地改善区块整体开发状况，通过层系井网调整的实施，全区日产液增加5 640 t，日产油增加197 t，含水率基本稳定，采油速度上升至0.60%，流压沉没度得到恢复，区块整体开发状况得到有效改善。截止2017年8月已累计增油20.5×104 t，提高采收率2.0%以上，井网加密、细分层系调整效果显著，解决了油层动用程度差的问题，提高了最终采收率。

关键词: 层系井网, 优化调整, 应用分析