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| 滨里海盆地东缘构造演化及油气成藏模式分析 |
| 胡杨,夏斌,王燕琨,万志峰,蔡周荣 |
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(1. 南华大学 矿业工程博士后工作站, 湖南 衡阳 421001;
2. 南华大学 核资源与核燃料工程学院, 湖南 衡阳 421001;
3. 中山大学 海洋学院, 广东 广州 510275;
4. 中国石油勘探开发研究院, 北京 100083) |
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| 摘要: |
| 滨里海盆地是中亚地区油气资源最为丰富的沉积盆地之一。本文以油气地质理论为指导,对盆地东缘的构造演化以及其油气成藏组合进行分析,认为乌拉尔造山运动对盆地东缘的构造演化造成了深刻影响。盆地东缘盐上层系的生烃条件较差,主要油气来源应为盐下层系。石炭系碳酸盐岩KT-I层和KT-II层是盆地东缘发育的良好储层。下二叠统盐层为区域性盖层,特别是对盐下油气藏起到了良好的区域封盖效果,盐相关构造圈闭类型发育。不整合面、断层和孔、洞、缝等组成复合的油气输导体系。盆地东缘的油气成藏模式主要为盐下层系的"自生自储型"和"下生上储型"以及盐上层系的"下生上储型"。 |
| 关键词: 滨里海盆地东缘 构造演化 油源条件 储盖条件 圈闭条件 油气成藏模式 |
| DOI： |
| 附件 |
| 投稿时间：2014-02-18修订日期：2014-02-26 |
| 基金项目:湖南省自然科学基金项目(14JJ6023)、湖南省教育厅一般项目(13C807)、南华大学博士科研启动基金(2012XQD03)联合资助 |
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| Tectonic evolution and hydrocarbon accumulation model in eastern Precaspian Basin |
| HU Yang, XIA Bin, WANG Yan-kun, WAN Zhi-feng, CAI Zhou-rong |
(1. Post-doctoral Research Station of Mining Engineering, University of South China, Hengyang 421001, Hunan, China;
2. School of Nuclear Resources and Nuclear Fuel Engineering, University of South China, Hengyang 421001, Hunan, China;
3. School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510275, Guangdong, China;
4. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China) |
| Abstract: |
| The Precaspian Basin has proved to be one of profilic sedimentary basins in Central Asia. A preliminary study is made in the present paper for the tectonic evolution, source-reservoir-seal associations and migration of hydrocarbons on the eastern margin of the Precaspian Basin. Uralian orogeny is believed to have exerted an important effect on the eastern margin of the Basin. Generally speaking, the suprasalt strata are poor in hydrocarbon accumulation. Instead, the hydrocarbons mainly originated from the subsalt strata. The Carboniferous carbonate rocks KT-I and KT-II beds are interpreted to be the excellent reservoir rocks in the study area. The Lower Permian salt beds appear as the regional cap rocks, and contribute a lot to the local sealing of subsalt hydrocarbons. The salt-associated structural traps are well developed, and the unconformities, faults, pore spaces and fissures constitute a compound oil-gas carrier system. The models for the hydrocarbon accumulation include the "selfgeneration and self-accumulation" type for the subsalt strata, and "lower-generation and upper-accumulation" type for the suprasalt strata. |
| Key words: eastern Precaspian Basin tectonic evolution source rock reservoir rock trap model for hydrocarbon accumulation |