付立新;吴雪松;赵敏;郭淑文;王辉;杨子玉;冯建园;

• 1:中国石油大港油田勘探开发研究院

• 2:中国石油大港油田勘探处

摘要(Abstract)：

埕海潜山位于歧口凹陷南缘,是覆盖巨厚中生界、上古生界的内幕型潜山构造,近期勘探在远离基岩风化壳的奥陶系发现高产天然气.为明确奥陶系碳酸盐岩潜山形成演化、内幕缝洞储层发育及天然气成藏的关系,在新的三维地震资料解释基础上,解剖内幕潜山地质结构.结果表明:埕海潜山经历3期构造变形,即印支期逆冲褶皱、盐山期走滑断陷及喜山期反转构造.中生代早期逆冲推覆、新生代构造负反转对潜山内幕圈闭形成和缝洞储层展布最为重要.埕海潜山天然气源自上古生界煤系,新近纪构造深埋促进煤系源岩二次生烃,并沿负反转断裂系充注于奥陶系内幕成藏.由于高角度裂缝切割奥陶系含石膏地层,促进大规模TSR反应,导致天然气藏富集硫化氢.

关键词(KeyWords)：歧口凹陷;埕海潜山;地质构造;奥陶系;天然气;成藏

Abstract:

Keywords:

基金项目(Foundation):中国石油天然气股份有限公司重大科技专项(2008E-0604,2012E-06)

作者(Author):付立新;吴雪松;赵敏;郭淑文;王辉;杨子玉;冯建园;

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