焉耆盆地侏罗纪煤系烃源岩有机相

新疆石油地质 ›› 2004, Vol. 25 ›› Issue (1): 41-43.

焉耆盆地侏罗纪煤系烃源岩有机相

严永新

中国石化河南油田分公司石油勘探开发研究院,河南南阳473132

收稿日期:2003-05-12 出版日期:2004-02-01 发布日期:2020-08-06
作者简介:严永新(1968-), 男,湖北荆门人,工程师,石油地质。联系电话:0377-3837512

Study on Organic F acies of Jurassic Coal Measure Source Rocks in Y anqi Basin

YAN Yong-xin

Research Institute of Petroleum Exploration and Development, Henan Oilfield Company, Sinopec, Nanyang, Henan 473132, China

Received:2003-05-12 Online:2004-02-01 Published:2020-08-06

摘要/Abstract

摘要： 焉耆盆地是中国西部众多中新生代小型含煤盆地之一。该盆地侏罗系煤系烃源岩主要分布于博湖坳陷,组成.了侏罗系含油气系统。通过对焉耆盆地多口井样品分析的显微组分的定量统计和各种煤相参数的研究,发现研究区煤岩具有较高的凝胶化指数和低的植物组织保存指数,说明大部分煤岩形成于水体流动性不强的还原环境。根据煤系有机相研究分析,可以划化分为干燥泥炭沼泽相、潮湿森林泥炭沼泽相、过渡边缘沼泽相、活水泥炭沼泽相和开阔水体相五种有机相。研究指出,水进序列的含煤建造是焉耆盆地煤系烃源岩成烃的有利环境。

关键词: 新疆, 焉耆, 侏罗纪, 生油岩, 有机相

Abstract: Yanqi basin is one of the small coal-bearing basins of Mesozoic and Cenozoic in W est China. Since 1993, two oil-gas fields with fouroil-bearing blocks have been found successively. The Jurassic source rocks in coal measure strata are mainly distributed in Bohu depression,forming Jurassic petroleum system. Through quantitative statistics of petroleum micro-constituents from wells by sample analysis and study ofvarious coal-measure facies parameters in Yanqi basin, it is found that they are high in gelation index and low in plant tissues restoring index,proving that most coal measures are formed reducing environment with weak water mobility. The coal measure facies can be divided into fiveones such as dry peat marsh, moist forest peat marsh, transitional margin marsh, living water peat marsh and open water facies. It is pointed out .that the coal-bearing formation in transgressing sequences is favorable environment for hydrocarbon generation in Jurassic coal measure sourcerocks in Yanqi basin.

Key words: Xinjiang, Y anqi basin, Jurassic, source rock, organic facies

中图分类号:

TE111

严永新. 焉耆盆地侏罗纪煤系烃源岩有机相[J]. 新疆石油地质, 2004, 25(1): 41-43.

YAN Yong-xin. Study on Organic F acies of Jurassic Coal Measure Source Rocks in Y anqi Basin[J]. Xinjiang Petroleum Geology, 2004, 25(1): 41-43.

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