Rock Facies Type and Sedimentary Facies of Shanxi
详细信息
- 责任者：Zhao Ronghua (Institute of Sedimentary Geology ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Tian Jingchun
- 刊名：Fault-Block Oil and Gas Fields
- 出版年：2012
- 卷期：19(1)
- 关键词：沉积岩相 ; lithofacies ; 沉积相 ; sedimentary facies ; 油气勘探 ; petroleum exploration ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.70-74
- 图表：4 illus., 16 refs.
- 分类号：1003
- issnNo：ISSN1005-8907
- isbnNo：CN41-1219/TE
摘要
Shanxi Formation is major gas reservoir in Su 76 and Su 77 Well Area of Sulige Gas Field.Based on the core observation and analysis of Shanxi Formation in Su 76 and Su 77 Well Area,the rock facies can be classified into 19 types,including the conglomerate facies with block matrix support and the sandstone facies with tabular cross bedding,etc.Through detailedly analyzing the combination type of rock facies,Shanxi formation in Su 76 and Su 77 Well Area are determined to be the outer fan of alluvial fan deposition combined with the characteristics of log presentation,regional structure and sedimentary background.Early Permian Shanxi Formation in the study area can be classified into braid channel,interchannel subfaces and the flood plains with peat paleo-bog subfacies.Thereinto,three forms of sedimentary microfacies are divided into braid channel bar that are arenaceous channel bar,rudaceous channel bar and arenaceous conglomeratic channel bar facies.And then,the sedimentary model of Shanxi Formation in the study area is established.Comprehensive study shows that the sediments of Shanxi Formation in the study area are products of Hangjinqi alluvial fan constantly stretching to the south of Ordos basin and are dominated by Yinshan ancient land and Yimeng upwelling.The arenaceous channel bar and arenaceous conglomeratic channel bar in braid channel are the most important reservoir sand bodies in this area.This achievement can provide an important geological basis for making development program.