| 准噶尔盆地南缘侏罗系烃源岩排烃效率研究 |
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| 引用本文： | 郭继刚,李建华,庞雄奇,向才富,姜福杰,王鹏威. 准噶尔盆地南缘侏罗系烃源岩排烃效率研究[J]. 现代地质, 2013, 27(5): 1081-1088 |
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| 作者姓名： | 郭继刚 李建华 庞雄奇 向才富 姜福杰 王鹏威 |
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| 作者单位： | 中国石油大学(北京)油气资源与探测国家重点实验室，北京 102249 |
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| 基金项目： | 国家自然科学基金项目(41102085)；国家自然科学基金项目(U1262205)；国家重点基础研究发展规划“973”项目(2011CB201102)；国家科技重大专项项目(2011ZX05006-006)。 |
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| 摘 要： | 准噶尔盆地南缘下部成藏组合勘探日趋重要，其主力烃源岩生烃潜力和排烃效率的研究亟待加强。根据排烃门限理论，利用生烃潜力法建立了准噶尔盆地南缘侏罗系烃源岩的生、排烃模式，并计算了烃源岩的生烃量、排烃量和排烃效率。研究表明，准噶尔盆地南缘侏罗系泥质烃源岩和煤层的排烃门限对应的镜质组反射率均为0. 7 %。侏罗系烃源岩的总生烃量为3 973. 84 x 108t，总排烃量为1 402. 71 x108t，其中八道湾组烃源岩排烃量占总排烃量的69.85%。准噶尔盆地南缘侏罗系烃源岩的平均排烃效率为35. 30%，不同层系不同岩性烃源岩，其排烃效率明显不同，泥质烃源岩排烃效率远大于煤层。综合分析认为，准噶尔盆地南缘侏罗系烃源岩生、排烃量大，排烃效率较高，下部成藏组合以侏罗系烃源岩为主力烃源岩，具有良好的资源潜力。
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| 关 键 词： | 排烃效率 排烃门限 烃源岩 侏罗系 下部成藏组合 准噶尔盆地南缘 |
| 收稿时间： | 2013-02-28 |
| 修稿时间： | 2013-05-17 |
Study on Expulsion Efficiency of Hydrocarbon for the Jurassic Source Rock in the Southern Margin of Junggar Basin |
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| GUO Ji-gang , LI Jian-hua , PANG Xiong-qi , XIANG Cai-fu , JIANG Fu-jie , WANG Peng-wei. Study on Expulsion Efficiency of Hydrocarbon for the Jurassic Source Rock in the Southern Margin of Junggar Basin[J]. Geoscience of Geosciences, 2013, 27(5): 1081-1088 |
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| Authors: | GUO Ji-gang LI Jian-hua PANG Xiong-qi XIANG Cai-fu JIANG Fu-jie WANG Peng-wei |
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| Affiliation: | State Key Laboratory of Petroleum Resources and Prospecting ,China University of Petroleum，Beijing 102249 |
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| Abstract: | The below oil-reservoir combination in the southern margin of Junggar basin is playing an importantrole in the hydrocarbon exploration，thus it is necessary to focus our attention on the research on hydrocarbonpotential and expulsion efficiency of hydrocarbon of chief source. In this paper, based on the theory of hydrocarbon-expulsion threshold，models of hydrocarbon generation and expulsion of the Jurassic source rocks were established and their quantity of hydrocarbon generation and expulsion，expulsion efficiency of hydrocarbon were calculated by using the hydrocarbon-generation potential method. The results showed that the vitrinite reflectance corresponding to hydrocarbon-expulsion threshold of both mudstone and coal seam is0.7%.The total hydrocarbon generation quantity and the total hydrocarbon expulsion quantity of the Jurassic source rocks are 3 ,973. 84 x 108t and 1 ,402. 71 x 108t respectively. Of all the hydrocarbon expulsion quantity，69. 85 percentages of them were expulsed by the source rocks in Badaowan Formation. The average hydrocarbon expulsion efficiencv of Jurassic source rocks is 35. 30% in the southern margin of Junggar basin. The hydrocarbon expulsion efficiency of source rock with different series of strata and different lithology is obviously different. The hydrocarbon expulsion efficiency of mudstone is much higher than that of coal seam. In general，source rocks in the Jurassic have generated and expulsed large amounts of hydrocarbons，and the expulsion efficiency of hydrocarbon is quite high，indicating a promising resource prospect of the below oil-reservoir combination in the southern margin of Junggar basin. |
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| Keywords: | expulsion efficiency of hydrocarbon hydrocarbon-expulsion threshold source rock Jurassic the below oil-reservoir combination southern margin of Junggar basin |
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