曲靖盆地浅层生物气成藏要素及运聚特征初步分析  

FACTORS ABOUT SHALLOW BIOGENIC GAS RESERVOIR AND EVIDENCE OF ITS MIGRATION AND ACCUMULATION IN THE QUJING BASIN

作　　者：吴川[1] 陈广浩[1] 何家雄[1] 余光春[2] 

机构地区：[1]中国科学院边缘海地质重点实验室 [2]中国地质大学(武汉)资源学院,湖北武汉430074

出　　处：《天然气地球科学》2007年第5期673-677,共5页Natural Gas Geoscience

基　　金：中国科学院知识创新工程重要方向项目(编号:KZCX2-YW-203-2)资助

摘　　要：曲靖盆地是区域性走滑构造应力作用下形成的第三纪箕状断陷湖盆残留盆地。研究了构成曲靖盆地生物气系统的气源岩、储集层、盖层等成藏基本要素(尤其是气源岩埋藏史)和该生物气的运聚特点、含气系统在剖面上的特征以及构造演化对成藏的控制作用等,认为由于受构造抬升影响,造成储层、盖层破坏和含气圈闭规模较小,该盆地生物气藏的资源潜力有限,生物气勘探前景并不十分乐观。Qujing basin in the Yunnan province as a Tertiary fault-subsidence lacustrine residual basin is formed under the regional strike-slip tectonic stress. In this context, we systematically investigat6 the characteristics of biogenic gas reservoir, e.g. source rocks, reservoirs and cap rocks （especially the burial history of source rocks）, migration and accumulation, the geological sections in the hydrocarbon system, and the controlling function of tectonic evolution in the gas accumulation in the Qujing basin. According to the integrated analyses and comprehensive understanding of hydrocarbon geology, the future exploration of biogenic gas reservoirs in the Qujing basin is not expected because of the reservoirs and cap rocks damaged by tectonic-uplift and the small scale of trap.

关 键 词：曲靖盆地 生物气 生物气系统 成藏要素 运聚特点 

分 类 号：TE122.1[石油与天然气工程—油气勘探]