塔里木盆地煤成气勘探潜力分析  

Exploration Potential of Coal-derived Gas in Tarim Basin

作　　者：吴小奇[1] 廖凤蓉 黄士鹏[1] 

机构地区：[1]中国石油勘探开发研究院,北京100083

出　　处：《天然气地球科学》2011年第6期975-981,共7页Natural Gas Geoscience

基　　金：国家自然科学基金项目(编号:40972134);中国石油勘探开发研究院中青年创新基金项目(编号2010-B-16-04)联合资助

摘　　要：塔里木盆地是我国重要的油气产区之一,迄今已发现了以克拉2气田为代表的一批大中型气田。盆地具有丰富的天然气资源,但目前探明程度仍然很低,是我国天然气勘探最有潜力的盆地之一。煤成气是塔里木盆地天然气的主体,目前已发现的10个大气田中有7个为煤成气田,三叠系—侏罗系煤系是塔里木盆地煤成气主要源岩,受其展布的控制,塔里木盆地煤成气主要分布在库车坳陷和南缘毗邻处以及塔西南坳陷。塔里木盆地潜在的煤成气勘探领域主要包括:库车坳陷深层致密砂岩气,成藏条件优越,勘探潜力巨大;塔西南坳陷勘探程度很低,有望发现更多的煤成气田;英吉苏凹陷是中晚侏罗世沉降中心之一,该区岩性气藏勘探前景良好。Tarim basin is one of the important oil and gas producing areas in China,and a series of large-medium size gas fields such as Kela-2 have been discovered till present.Although there is plentiful natural gas resource,the proven degree is still very low.Thus,the Tarim basin is one of the most potential basins for natural gas exploration in China.In the 7 of the 10 large-size gas fields of Tarim basin,natural gas as a coal-derived gas is sourced from the Triassic and Jurassic coal measures.The distribution of coal-derived gas controlled by Triassic-Jurassic coal measures is in the Kuqa depression and its southern adjacent area as well as the southwestern depression of the basin.The potential area for coal-derived gas exploration in the Tarim basin is as follows：Deep-seated tight sandstone gas in the Kuqa depression which has favorable reservoir conditions and large exploration potentials,the southwest depression which is poor in proven degree and great for discovering more coal-derived gas fields,the Yingjisu sag which is a exploration prospect of lithological gas pools due to one of the lower-middle Jurassic subsidence centers.

关 键 词：塔里木盆地 天然气 煤成气 煤系 勘探有利区 

分 类 号：TE132.2[石油与天然气工程—油气勘探]