排液采油是水驱油田开发中后期保持油田稳产的基本措施。本文以老君庙油田 L 油藏的主力层 L_3合采排液井为对象,分析了连续排液采油3—22年、生产层位不变、综合含水大于90％的排液井58口和非排液井16口的系统资料,对多层状砂岩油藏排液采油的必然性,排液采油对油田的稳产作用,油井排液的条件,排液效果的影响因素及排液的技术界限等问题进行了研究与探讨。 Liquid drainage is the basic measure to keep oilfield stable in the middle and later stages of the development of water-driven oilfields. In this paper, L 3 flushing drainage well, the main reservoir of L reservoir in Laojunmiao Oilfield, is taken as an example. The results of continuous drainage and production of oil well for 3 to 22 years and production level of 58% System data of 16 non-drainage wells, inevitability of drainage and production of multi-layered sandstone reservoir, stable production of oil field by drainage production, conditions of oil well drainage, influencing factors of drainage effect and technical limits of drainage And other issues were studied and discussed.