泾河油田17井区原油粘度分布及成因分析

Crude Oil Viscosity Distribution Characteristics and Its Geological Origins of Jinghe Well Region 17

原油族组分、饱和烃气相色谱和饱和烃气相色谱-质谱分析结果表明,泾河原油高粘高密的主要成因不是原油低成熟度引起的,最可能是生烃物质为高碳类高等植物所造成的,原油组分中胶质、沥青质和蜡含量偏高是泾河原油高粘高密的主要物质成因。从油气运移和油藏保存条件入手,通过断裂、构造、沉积和水洗作用等影响原油粘度分布的因素分析,明晰了泾河17井区长8储层原油粘度平面分布特征和原油粘度复杂多变的地质成因。

The analysis of crude oil component, saturated hydrocarbon gas chromatogram and its combination with mass spectrometry shows that, instead of low maturity of crude oil, hydrocarbon generation material consisting of high carbon is most likely responsible for the formation of Jinghe crude oil with high viscosity and high density. As far as the conditions of oil--gas migration and reservoir preservation concerned, it is confirmed that the crude oil viscosity distribution characteristics and its geological origins of Chang 8 reservoir of Jinghe Well Region 17 are determined by factors such as fracture, geological structure, deposition and washing action.