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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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冀中坳陷马西洼槽异常高压与油气成藏
Keywords: 马西洼槽,异常高压,油气成藏,成藏模式
Abstract:
？冀中坳陷马西洼槽古近系沙河街组普遍发育异常高压带，异常高压主要发育在沙二段、沙三段，其中沙三上亚段最大压力系数达1.37，且异常压力系数由洼槽向洼缘逐渐降低。烃源岩生排烃是该区形成异常高压的主要原因。异常高压对马西洼槽油气成藏主要有3种作用：一是改善储层;二是增加盖层的封闭性;三是为油气运聚成藏提供动力。在此基础上建立了任东斜坡区高压—中孔岩性—构造油藏、洼槽区高压—中孔构造—岩性油藏及南马庄陡坡区常压—中高孔岩性或构造岩性复合油藏等3种成藏模式。
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