现代地质Issue(5)：1081-1088,8.
准噶尔盆地南缘侏罗系烃源岩排烃效率研究
Study on Expulsion Efficiency of Hydrocarbon for the Jurassic Source Rock in the Southern Margin of Junggar Basin
摘要
Abstract
The below oil-reservoir combination in the southern margin of Junggar basin is playing an important role in the hydrocarbon exploration,thus it is necessary to focus our attention on the research on hydrocarbon potential and expulsion efficiency of hydrocarbon of chief source.In this paper,based on the theory of hydrocar-bon-expulsion threshold,models of hydrocarbon generation and expulsion of the Jurassic source rocks were es-tablished 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 reflec-tance corresponding to hydrocarbon-expulsion threshold of both mudstone and coal seam is 0.7%.The total hy-drocarbon generation quantity and the total hydrocarbon expulsion quantity of the Jurassic source rocks are 3,973.84 ×108t and 1,402.71 ×108t respectively.Of all the hydrocarbon expulsion quantity,69.85 percenta-ges of them were expulsed by the source rocks in Badaowan Formation.The average hydrocarbon expulsion effi-ciency 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 hydrocar-bon expulsion efficiency of mudstone is much higher than that of coal seam.In general,source rocks in the Ju-rassic 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.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Key words
expulsion efficiency of hydrocarbon/hydrocarbon-expulsion threshold/source rock/Jurassic/the below oil-reservoir combination/southern margin of Junggar basin分类
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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,(5):1081-1088,8.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）。 （）
