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从沉积微相、储层特征、盖层特征以及储盖组合等方面分析了长6油层组油气分布的主要控制因素,得到了研究区油气分布的几点规律。油气的分布主要受沉积微相和储层物性的控制,油气主要分布在水下分流河道沉积环境,孔隙度大于9%,渗透率大于1×10-3μm2的地区。同时盖层的遮挡能力以及储盖组合的配置条件也对油气的分布具有重要的控制作用。油气主要分布在长61油层亚组泥岩盖层发育良好,并且储盖组合良好的地区。
The main controlling factors of oil and gas distribution in Chang 6 reservoir are analyzed from the aspects of sedimentary microfacies, reservoir characteristics, cover characteristics and reservoir-cap assemblage, and some rules of oil and gas distribution are obtained. The distribution of oil and gas is mainly controlled by sedimentary microfacies and reservoir physical properties. Oil and gas are mainly distributed in the sedimentary environment of underwater distributary channels with porosity greater than 9% and permeability greater than 1 × 10-3μm2. At the same time, the occlusion ability of caprock and the configuration conditions of reservoir-cap combination also play an important role in controlling the distribution of oil and gas. Oil and gas are mainly distributed in well-developed mudstone caprocks in the sub-group of Chang-61 reservoir, with good reservoir-cap combination.