岩性油气藏 ›› 2018, Vol. 30 ›› Issue (1): 3038.doi: 10.3969/j.issn.1673-8926.2018.01.003
曹跃1, 刘延哲1, 陈义国1, 孟旺才1, 高鹏鹏2
CAO Yue1, LIU Yanzhe1, CHEN Yiguo1, MENG Wangcai1, GAO Pengpeng2
摘要: 东韩油区长7—长9油层组(以下简称长7—长9)勘探认识程度低,为了搞清下部地层油气成藏条件及主控因素,利用87口综合录井和测井,以及15口钻井薄片鉴定、物性分析、试油测试等资料,并应用致密油气成藏地质学理论,开展了烃源岩、沉积微相、岩石学特征及储集性能、泥岩盖层等方面的成藏条件分析,从油藏分布与烃源岩、沉积微相、构造、盖层等方面探讨了油藏的主控因素。结果表明:①研究区发育长7和长9共2套烃源岩,其中长7为主力烃源岩,长9为对油区具有一定的贡献烃源岩,发育水下分流河道和水下分流间湾等沉积微相,水下分流河道中的细砂岩为主要储层,岩石类型以岩屑质长石砂岩为主,物性条件差,湖泛期沉积的泥页岩和分流间湾泥岩为主要盖层;②烃源岩、沉积微相、三角洲前缘水下分流河道叠合连片的岩性变化带、鼻状隆起带等的有效匹配是长7—长9致密砂岩能否成藏及取得突破的关键;③研究区发育2种成藏组合类型,其中长7以自生自储型成藏组合为主,长8、长9以上生下储型成藏组合为主。以上认识对该区深部勘探部署或类似地区的研究具有借鉴作用。
中图分类号:
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