稠油注水油田中后期改善开发效果技术研究

普通稠油注水开发油田由于油水粘度比大,面临进入高含水中后期水驱开采效果越来越差的普遍矛盾.针对海外河油田地质条件复杂,开发中存在油藏认识程度低、注采系统不完善、水驱动用程度低等主要矛盾,以"注够水、注好水"为核心,通过精细地质和剩余油分布规律研究,采用完善注采井网、细分注水单元、"提、控、治"等多种有效手段调整优化注采结构,使油田开发效果得到明显改善

THE RESEARCH ON IMPROVING THE WATER FLOODING EFFECT IN THE MID-LATE DEVELOPMENT STAGE

To the common water flooding oilfields, it is commonly seen that most of the oilfields face the problem that the water flooding effect gets poorer due to the higher ratio of water-oil viscosity when the oil fields reach the mid-late development stages. In the paper, Haiwaihe Oilfield is taken as an example for the research. In view of the existing such problems in the oilfield as complicated geological conditions, low recognition degree of the oilfield, incomplete injection-production system, low producing degree by the water flooding, centered on 'injecting enough and good quality water ',the accurate geological and residual oil distribution regulation research are carried out. As a result, the water flooding effect has been greatly improved by appropriate measures, including perfecting injection-production well pattern, subdividing the water flooding unit, draining liquid, controlling the ineffective water cycling, controlling sand production and preventing casing destroy.