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半深湖-深湖细粒沉积区致密油气是目前油气勘探规模增储的现实领域之一,细粒沉积岩基本地质认识是制约其勘探成功的关键因素。本文在沧东凹陷孔二段系统取心观察及千余块次实验测试数据分析基础上,提出了细粒沉积矿物成分复杂、岩石类型多样,不仅发育烃源岩、而且发育规模性储层,储层虽致密但多类型微孔缝发育的认识,支持了孔二段致密油勘探的突破。
Semi-deep lake-deep-lake fine-grained sedimentary zone The tight oil and gas is one of the realistic fields for oil and gas exploration to increase reserves. The basic geologic understanding of fine-grained sedimentary rocks is the key factor restricting the exploration success. Based on the coring observation and the experimental data analysis of more than a thousand blocks in the second member of Cangdong Depression, it is proposed that the composition of fine-grained sedimentary minerals is complex and the rock types are diverse, not only developing source rocks but also developing scale reservoirs, Although the reservoir is dense but the development of many types of microporous seams, it supports the breakthrough of the tight oil exploration in the second member of the pore.