Discussion on “sandwich” structures and preservation conditions of shale gas in the South Yellow Sea Basin

Jian-qiang Wang; Jian-ming Gong; Li Zhang; Hai-yan Cheng; Jing Liao; Jian-wen Chen; Jing Su; Chuan-sheng Yang

doi:10.31035/cg2018064

2018 Vol. 1, No. 4

Article Contents

Article navigation > China Geology > 2018 > 1(4): 485-492

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Jian-qiang Wang, Jian-ming Gong, Li Zhang, Hai-yan Cheng, Jing Liao, Jian-wen Chen, Jing Su, Chuan-sheng Yang, 2018. Discussion on “sandwich” structures and preservation conditions of shale gas in the South Yellow Sea Basin, China Geology, 1, 485-492. doi: 10.31035/cg2018064

Citation:

Discussion on “sandwich” structures and preservation conditions of shale gas in the South Yellow Sea Basin

a.
Qingdao Institute of Marine Geology, CGS, Qingdao 266071, China
b.
Laboratory for Marine Mineral Resource, Qingdao Pilot National Laboratory for Marine Science and Technology, Qingdao 266071, China
c.
Guangzhou Marine Geological Survey, Guangzhou 510760, China
d.
Qingdao Geological Exploration Institute of China Metallurgical Geology Bureau, Qingdao 266071, China

More Information

Corresponding authors: wangjianqiang163@163.com (Jian-qiang Wang); gongjianm@aliyun.com (Jian-ming Gong)

Received Date: 28 September 2018

Revised Date: 30 October 2018

Accepted Date: 07 November 2018

Available Online: 07 December 2018

Publish Date: 25 December 2018

Abstract

Abstract

In order to make a breakthrough in Mesozoic-Paleozoic shale gas exploration in the South Yellow Sea Basin, a comparison of the preservation conditions was made within the Barnett shale gas reservoirs in the Fortworth Basin, the Jiaoshiba shale gas reservoirs in Sichuan Basin and potential shale gas reservoirs in Guizhou Province. The results show that the “Sandwich” structure is of great importance for shale gas accumulation. Therein to, the “Sandwich” structure is a kind of special reservoir-cap rock assemblage which consist of limestone or dolomite on the top, mudstone or shale layer in the middle and limestone or dolomite at the bottom. In consideration of the Mesozoic-Paleozoic in the Lower Yangtze, and Laoshan Uplift with weak Paleozoic deformation and thrust fault sealing on both flanks of the Laoshan Uplift, a conclusion can be drawn that the preservation conditions of shale gas probably developed “Sandwich” structures in the Lower Cambrian and Permian, which are key layers for the breakthrough of shale gas in the South Yellow Sea. Moreover, the preferred targets for shale gas drilling probably locate at both flanks of the Laoshan Uplift.
- "Sandwich" structure /
- Preservation conditions /
- Shale gas /
- Laoshan Uplift /
- South Yellow Sea

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References

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