鄂尔多斯盆地东部山西组高分辨率层序地层与天然气聚集研究  

High-resolution Sequence Stratigraphy and Gas Accumulation of Shanxi Formation in East Ordos Basin

作　　者：彭海艳[1] 刘家铎[1] 陈洪德[1] 刘文均[1] 叶黎明[1] 龚剑玄 

机构地区：[1]成都理工大学沉积地质研究院,四川成都610059 [2]中国建筑西南勘察设计研究院,四川成都610081

出　　处：《石油物探》2008年第5期519-525,20,共7页Geophysical Prospecting For Petroleum

摘　　要：应用Cross基准面旋回原理,通过对野外露头、钻井岩心和测井等资料的综合分析,对鄂尔多斯盆地东部二叠系山西组进行了高分辨率层序地层研究,提出山西组有两种不同的沉积体系类型,即早期以海陆过渡相的冲积一三角洲一浅海沉积环境为主,平原上的河流类型以辫状河为主;晚期则以陆相的冲积-三角洲-湖泊沉积体系为主,平原上的河流类型以曲流河为主。在层序地层学研究的基础上,探讨了层序地层空间展布及其与天然气聚集的关系,指出山西组中的天然气主要储集于各级旋回层序的上升半旋回中。Through integrated analysis of field crop,core and logging da- ta,Cross base level cycle principle was adopted to study the high- resolution sequence stratigraphy of Shanxi formation in Ordos Ba- sin.Two kinds of different depositional system types were pro- posed in Shanxi formation.In early phase,sedimentary environ- ment is mainly alluvial-delta-shallow sea of marine-continental tran- sitional facies and braided river of fluvial facies.In later phase, sedimentary environment is mainly alluvial-delta-lacustrine of conti- nental facies and meandering river of fluvial facies.On the basis of researching sequence stratigraphy,the spatial distribution of se- quence formations is discussed and its relationship with gas accu- mulation is probed.The result shows that gas mainly accumulates in rising semi-cycle of various level cycle sequences in Shanxi for- mation.

关 键 词：鄂尔多斯盆地东部 山西组 基准面旋回 层序界面 天然气聚集 

分 类 号：P631.4[天文地球—地质矿产勘探]