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| 沾化凹陷多元供烃成藏特征及成藏模式 |
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孙耀庭1,2,徐守余1,张世奇1,刘金华3,巩建强2,孟涛2,李辉2
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(1.中国石油大学地球科学与技术学院,山东青岛 266580;2.中国石化胜利油田分公司勘探开发研究院,山东东营 257015;3.中国石化江苏油田分公司地质科学研究院,江苏扬州 225012)
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| 摘要: |
| 综合构造单元划分,结合油气来源分析,对沾化凹陷多元供烃成藏单元进行划分,进而分析成藏要素,明确源-藏体系形成的动态过程。结果表明,沾化凹陷可划分为单洼单源、单洼多源和多洼多源3类7个多元供烃成藏单元。东营组沉积时期沙四上亚段烃源岩成熟,形成洼陷内部单源岩性油藏和缓坡带的单源油藏;明化镇组沉积时期各段烃源岩均进入大量排烃期,油气在陡坡-凸起带和中央低凸起上形成大规模的混源油藏。不同供烃成藏单元输导体系与储盖组合的耦合控制了油气的分布:在平面上油气呈发散式向构造高部位运移,在缓坡带、陡坡带、低凸起和潜山等有利的圈闭聚集成藏;在剖面上沙四段、沙三段形成自源型岩性油气藏,新近系的油气分布于馆陶组厚层河流相储层形成披覆构造油藏。 |
| 关键词: 烃源岩 多元供烃 输导体系 成藏模式 沾化凹陷 |
| DOI：10.3969/j.issn.1673-5005.2015.06.005 |
| 分类号::TE 122.1 |
| 基金项目:国家科技攻关课题(2011ZX05006-003);中国石化重点攻关课题(P13018) |
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| Reservoir characteristics and reservoir-forming model of multi-element hydrocarbon supply in Zhanhua sag |
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SUN Yaoting1,2, XU Shouyu1, ZHANG Shiqi1, LIU Jinhua3, GONG Jianqiang2, MENG Tao2, LI Hui2
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(1.School of Geosciences in China University of Petroleum, Qingdao 266580, China;2.Geo-Science Research Institute,Shengli Oilfield Company, SINOPEC, Dongying 257015, China;3.Geology Research Institute of Jiangsu Oilfield, SINOPEC, Yangzhou 225012, China)
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| Abstract: |
| Zhanhua sag has the characteristic of multi-element hydrocarbon supply, which leads to the diversity and complexity of reservoir forming. Hydrocarbon accumulation unit of the multi-element hydrocarbon supply was divided by tectonic units combined with oil and gas sources, and dissect the source-reservoir system formation of the dynamic process. The hydrocarbon accumulation model of different accumulation units was studied. Researches show that Zhanhua sag can be divided into three kinds of hydrocarbon accumulation units, including hollow-one, hollow-multiple and multiple hollow-multiple hydrocarbons. Along with the establishment of Dongying Formation, the hydrocarbon of the upper part of the Fourth Member of Shahejie Formation matured; the single-source lithologic reservoir in the inner subsag and the reservoir in the gentle slope belt started to develop, and the source rocks entered into the hydrocarbon expulsion phase in Minghuazhen Formation. The extensively source-mixed reservoir formed on the steep slope and central low uplift. The translocation system coupled with reservoir-seal assemblage controlled the hydrocarbon distribution of different hydrocarbon accumulation units:the oil and gas migrated extensively from structural low to high on the plane;and oil and gas accumulated in favorable traps of the gentle slope belt, steep slope zone, low salient and buried hills. In the profile, the autogenously lithologic reservoir formed in member 4 and 3 of Shahejie Formation, oil and gas distributed in the thick layer fluvial facies reservoir of Guantao Formation to form reservoirs of the drape structure in Neogene. |
| Key words: hydrocarbon source rocks multi-element hydrocarbon supply carrier system reservoir forming model Zhanhua sag |
