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国外许多实例研究表明 ,油藏内流体非均质性特征可作为判断油藏连通性的主要依据 ,但我国陆相含油气盆地碎屑岩储层物性非均质性强 ,导致油层内流体性质非均质性现象也更加复杂化、多样化。该文以松辽盆地新站油田为例 ,分析了油层内原油在族组成、饱和烃色谱指纹特征和生物标志物等方面存在的非均质性现象和分布特征 ,讨论了油源、油气运移、油层岩性、油藏内次生变化及油层连通性等地质 /地球化学因素对造成油层内流体非均质性和油藏内原油组成混合作用的影响。研究表明 ,影响油层内流体非均质性的因素十分复杂 ,不能简单地根据油层流体非均质性判断油层的连通性 ,必须在原油族群划分对比、在对影响流体非均质性诸因素充分分析的基础上进行判断
Many foreign studies have shown that the heterogeneity of fluid in reservoirs can be used as the main basis for determining reservoir connectivity. However, the heterogeneity of clastic reservoirs in terrestrial oil-bearing basins in China leads to the fluid properties Heterogeneity is also more complicated and diversified. Taking the Xinzhan Oilfield in Songliao Basin as an example, this paper analyzes the heterogeneity and distribution characteristics of crude oil in the reservoir, such as chromatographic fingerprints and biomarkers, and discusses the characteristics of oil source, oil and gas transport Migration, reservoir lithology, secondary changes in reservoirs and reservoir connectivity and other geologic / geochemical factors on the formation of reservoir fluid heterogeneity and the effect of crude oil composition in the reservoir. The research shows that the factors that affect the heterogeneity of fluid in reservoir are very complicated. The connectivity of reservoir can not be simply judged by reservoir fluid heterogeneity. Therefore, Based on the analysis to judge