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采用沉积学方法、岩石物性方法、孔喉结构参数法和流动带指数法对哈得4油田薄砂层油藏的取心井进行流动单元划分。采用流动带指数法对全区非取心井进行流动单元划分,将薄砂层油藏储层划分为E、G、M、P四种流动单元类型。在所有薄砂层油藏的沉积微相中,最有利于油气储集的潮间砂坪微相主要分布有E、G、M类流动单元。不同微相砂体间的岩性差异是形成这种分布特征的主要原因。
Sedimentology, petrophysical methods, pore-throat structure parameters and flow-band exponential method were used to classify flow cells in wellbores of thin sand reservoirs in Hade 4 oilfield. The flow cell index method is used to divide the flow cells of the non-coring wells in the whole area, and the thin sand reservoir is divided into four types of flow cells: E, G, M and P. Among all the sedimentary microfacies in all thin sand reservoirs, E, G and M flow units are mainly distributed in the interbedded sand-litter microfacies that is most conducive to hydrocarbon accumulation. The lithology difference among different microfacies sand bodies is the main reason to form this distribution characteristic.