Characterization of the Upper Ordovician and Lower Silurian Marine Shale in Northwestern Guizhou Province of the Upper Yangtze Block, South China: Implication for Shale Gas Potential

2014 ◽  
Vol 28 (6) ◽  
pp. 3679-3687 ◽  
Author(s):  
Yue Wu ◽  
Tailiang Fan ◽  
Jinchuan Zhang ◽  
Shu Jiang ◽  
Yifan Li ◽  
...  
Keyword(s):  
South China ◽  
Shale Gas ◽  
Guizhou Province ◽  
Yangtze Block ◽  
Upper Ordovician ◽  
Lower Silurian ◽  
Marine Shale ◽  
Gas Potential

Characterization of the Lower Cambrian Shale in the Northwestern Guizhou Province, South China: Implications for Shale-Gas Potential

2015 ◽  
Vol 29 (10) ◽  
pp. 6383-6393 ◽  
Author(s):  
Junpeng Zhang ◽  
Tailiang Fan ◽  
Jing Li ◽  
Jinchuan Zhang ◽  
Yifan Li ◽  
...  
Keyword(s):  
South China ◽  
Shale Gas ◽  
Lower Cambrian ◽  
Guizhou Province ◽  
Gas Potential

Shale gas potential of the major marine shale formations in the Upper Yangtze Platform, South China, Part II: Methane sorption capacity

Fuel ◽  
2014 ◽  
Vol 129 ◽  
pp. 204-218 ◽  
Author(s):  
Jingqiang Tan ◽  
Philipp Weniger ◽  
Bernhard Krooss ◽  
Alexej Merkel ◽  
Brian Horsfield ◽  
...  
Keyword(s):  
Sorption Capacity ◽  
South China ◽  
Shale Gas ◽  
Yangtze Platform ◽  
Shale Formations ◽  
Marine Shale ◽  
Methane Sorption ◽  
Gas Potential

Evaluation of Lower Cambrian Shale in Northern Guizhou Province, South China: Implications for Shale Gas Potential

2013 ◽  
Vol 27 (6) ◽  
pp. 2933-2941 ◽  
Author(s):  
Shuangbiao Han ◽  
Jinchuan Zhang ◽  
Yuxi Li ◽  
Brian Horsfield ◽  
Xuan Tang ◽  
...  
Keyword(s):  
South China ◽  
Shale Gas ◽  
Lower Cambrian ◽  
Guizhou Province ◽  
Gas Potential

scholarly journals Accumulation Mechanism of Marine Shale Gas Reservoir in Anticlines: A Case Study of the Southern Sichuan Basin and Xiuwu Basin in the Yangtze Region

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Kun Zhang ◽  
Yan Song ◽  
Shu Jiang ◽  
Zhenxue Jiang ◽  
Chengzao Jia ◽  
...  
Keyword(s):  
Shale Gas ◽  
Sichuan Basin ◽  
Large Scale ◽  
Horizontal Stress ◽  
Burial Depth ◽  
Depth Range ◽  
Upper Ordovician ◽  
Lower Silurian ◽  
Marine Shale ◽  
Accumulation Mechanism

The study of tectonics is one of the important aspects of shale gas preservation. It is vital for understanding how to determine the enrichment regularity of marine shale gas in anticlines. This paper focuses on typical shale blocks in the southern Sichuan Basin and shale in the Upper Ordovician and the Lower Silurian. In this study, triaxial unloading tests, permeability tests perpendicular and parallel to the stratification plane, FIB-HIM tests, and inclusion analyses are carried out with real drilling data. The enrichment regularity of marine shale gas in anticlines is studied by considering 2 aspects: the angle of the limbs and the burial depth. For anticlines with adjacent synclines, the migration regularity of shale gas is considered by 3 aspects: the dynamics, channels, and processes of migration. This study reveals that a limb angle greater than 120° reflects relatively good conditions for shale gas preservation, while limb angles lesser than 70° indicate relatively poor conditions. This study also suggests that during the process of uplift, large-scale concentrated fractures will form at a certain depth range and horizontal stress field, resulting in the large loss of shale gas. The regression equation of the fractured depth (H) and the horizontal stress (S) is presented as H=15.404S−754.41 (with a correlation coefficient R2=0.6834). The stratification plane and the organic pores form the migration channel of natural gas that is horizontal to the stratification plane in shale. Under the condition of both anticlines and contiguous synclines, shale gas escapes through fractures resulting from extrusion along the anticline and the uplift effect. In addition, driven by differences in the formation pressure coefficients, shale gas is capable of migrating in a short-distance stair-type style from synclines to the adjacent anticlines. Thus, if the drilling costs allow, the well locations should be placed in the more deeply buried synclines.

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