NQH西山窑组（J2x）油藏属于特低渗、低压、低流度的典型“三低”砂岩油藏。针对油干层的存在导致的注水效果差、单井产量低等问题，通过高速压汞和恒速压汞分析其孔隙结构特征、油干层与油层渗流实验等，明确了水相在油干层中渗流阻力小，油干层出水时间比油层出油时间短且所需压差小，油干层厚度比例大于40%以后，对开发效果影响较大。生产实践中通过注水井避射油干层、温和注水、调剖等注水技术对策，油干层吸水得到有效控制，油层动用程度得到提高，油田开发效果逐渐改善，这为其他同类型油藏有效开发提供了借鉴。%NQH Xishanyao(J2x)formation belongs to“three low”sandstone reservoir, which involves extra low permeability, low pressure and low flow. According to the problems caused by poor water flooding effects and low production of single well in oil dry layer, this paper adopts high speed pressure mercury and constant speed pressure mercury to analyze pore structure character, oil dry layer and oil layer seepage experiment, accordingly, the result shows that water phase has low filtrational resistance in oil dry layer, and reached surface time is shorter than oil out time, furthermore, when oil dry layer thickness ratio is greater than 40 %, it has great influence on development effects. In production practice, through technologies of avoidding direct injection, moderate wa⁃ter injection, profile control and water injection, water adsorption of dry oil layer has been effectively controlled, the producing de⁃gree of reservoir is improved and development effects are gradually improved, furthermore, this research provides references for oth⁃er similar oilfield.
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