2016, 35(1) 223-234 DOI:     ISSN: 1004-5589 CN: 22-1111/P
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Keywords
ground penetrating radar
sandstone body
deposition
meandering stream delta
Yanchang Formation
Authors
CAO Song
FENG Xuan
LU Qi
ZENG Zhao-Fa
ZHU Ru-Kai
BAI Bin
PubMed
Article by Cao, S.
Article by Feng, X.
Article by Lu, Q.
Article by Zeng, Z. F.
Article by Zhu, R. K.
Article by Bai, B.

Application of GP�� in depicting sedimentary reservoir of paleochannel sandstone bodies

CAO Song, FENG Xuan, LU Qi, ZENG Zhao-Fa, ZHU Ru-Kai, BAI Bin

1. College of Geo-exploration Science and Technology��Jilin University��Changchun 130026��China; 2. ��esearch Institute of Petroleum Exploration and Development��Beijing 100083��China

Abstract��

The distribution characteristics of outcrop sandbodies of meandering river delta front and delta plain distributary channels in the Ordos Basin were observed and described by utilizing the GP�� exploration technique�� The lithology of the studied area is mainly mudstone�� interbeded mudstone and siltstone and fine- grained sandstone�� intercalated with thin layered tuff��mainly coverd by loess in 1 ��5 m thickness in the surface of the area�� A series of data processing and quantitative analysis of 7 main sand bodies��such as thickness��height��are given�� The later- al scales of sandstone body are 54 m�� 83 m�� 54 m��38 m��104 m��160 m��191 m and the vertical scale of sand body are 6 m�� 7 m�� 5 m�� 8 m�� 6 m�� 10 m�� 9 m�� The ratio of the length and thickness of sandstone is 9�� 11. 8�� 10. 8��4. 8�� 17�� 16�� 21. 2��respectively�� The ratio of the width and the overall height of the river sandstone body is higher than 15��and the overall presentation of the sandstone and mudstone is composite sedimentary structures�� The sandstone body presents isolated lens in shape with gentle top and protuberant bottom�� Multi- staged period dep- osition is obvious in longitudinal river sandstone body and there are lateral migration�� The reflection characteristics of the GP�� profiles agree well to the results��

Keywords�� ground penetrating radar   sandstone body   deposition   meandering stream delta   Yanchang Formation  
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