鄂尔多斯盆地北部山西期-下石盒子期盆地演化与天然气富集规律  

Law of gas gathering and basin evolution from Shanxi to Xiashihezi Age in northern Ordos basin, China

作　　者：林雄[1] 徐小蓉[2] 侯中健[1] 田景春[1] 陈洪德[1] 李君文[1] 刘文均[1] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,成都610059 [2]长庆油田勘探开发研究院,西安710021

出　　处：《成都理工大学学报（自然科学版）》2005年第2期138-141,共4页Journal of Chengdu University of Technology: Science & Technology Edition

摘　　要：通过对鄂尔多斯地区晚古生代沉积盆地中天然气聚集与地质作用的研究认为,山西期-下石盒子期之所以成为鄂尔多斯上古生界主要产气层位,其地质因素与这一时期陆内盆地的扩张演化及其相应的沉积作用有关。这种关系表现在盆地处于下降时期,河流的垂向侵蚀作用大于侧向侵蚀,有充足的物源、有较大的可容空间,盆地的充填作用大于盆地扩张作用,易于形成良好的储层;而在超长周期层序的晚期,基准面旋回由上升向下降转化,也形成良好的储集砂体。It is well known that the late Palaeozoic Shanxi and Xiashihezi Formations are the main gas-generating strata in the Ordos basin, China. Based on the study of the relationship between the law of gas gathering and geologic agent in the basin, the authors think that the spreading of intracontinent basins and the sedimentation are the main geologic factors in the course of gas gathering. This shows that verticl erosion is stronger than lateral erosion in the river. The river provides rich material resources and bigger accomodation space.The filling action is stronger than the spreading action during the declining of the basin. So, good reservoirs can easily form. Basin-level cycle from ascending to declining can offer better reservoir sand bodies in the late ultra-long period stratigraphic sequence.

关 键 词：盆地演化 高分辨率层序地层 天然气聚集 鄂尔多斯盆地 山西期 下石盒子期 

分 类 号：TE121.1[石油与天然气工程—油气勘探]