Fault Development Characteristics and Their Effects on Current Gas Content and Productivity of No. 3 Coal Seam in the Zhengzhuang Field, Southern Qinshui Basin, North China

2021 ◽  
Vol 35 (3) ◽  
pp. 2268-2281
Author(s):  
Hui Wang ◽  
Yanbin Yao ◽  
Chencheng Huang ◽  
Dameng Liu ◽  
Yidong Cai
Keyword(s):  
Coal Seam ◽  
North China ◽  
Gas Content ◽  
Qinshui Basin ◽  
Southern Qinshui Basin

Geological controls on prediction of coalbed methane of No. 3 coal seam in Southern Qinshui Basin, North China

2011 ◽  
Vol 88 (2-3) ◽  
pp. 101-112 ◽  
Author(s):  
Yidong Cai ◽  
Dameng Liu ◽  
Yanbin Yao ◽  
Junqian Li ◽  
Yongkai Qiu
Keyword(s):  
Coal Seam ◽  
Coalbed Methane ◽  
North China ◽  
Qinshui Basin ◽  
Southern Qinshui Basin

scholarly journals Study on Reservoir Properties and Critical Depth in Deep Coal Seams in Qinshui Basin, China

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Guiqiang Zheng ◽  
Bin Sun ◽  
Dawei Lv ◽  
Zhejun Pan ◽  
Huiqing Lian
Keyword(s):  
Coal Seam ◽  
Step Change ◽  
Gas Content ◽  
Burial Depth ◽  
Critical Depth ◽  
Coal Seams ◽  
Reservoir Properties ◽  
Qinshui Basin ◽  
Geological Conditions ◽  
Change Characteristics

Coalbed methane (CBM) reservoir properties and relationship of properties with burial depth were studied based on the data derived from 204 deep CBM production wells in Qinshui Basin, China. Through the study, it is found that permeability and porosity decrease with the increase of burial depth and the decreasing trend shows step-change characteristics at a critical burial depth. They also show divisional characteristics at certain burial depth. Gas content, geostress, and geotemperature increase with the increase of burial depth, and the increasing trend shows step-change characteristics and also have divisional characteristics at certain burial depth. Based on the previous study on the reservoir property changes with burial depth, three series of critical depth using different parameters are obtained through simulating the critical depth using the BP neural network method. It is found that the critical depth is different when using different parameters. Combined the previous study with the normalization of three different parameter types, the critical depth in Qinshui Basin was defined as shallow coal seam is lower than 650 m and transition band is 650–1000 m, while deep coal seam is deeper than 1000 m. In deep coal seams, the geological conditions and recovery becomes poor, so it can be defined as unfavorable zones. Therefore, other development means, for example, CO2 injection, need to be used to accelerate the deep coal methane development.

Geological Controls of the Coalbed Methane (CBM) Enrichment in the Zhengzhuang Coal Zone, Southern Qinshui Basin, China

2012 ◽  
Vol 616-618 ◽  
pp. 234-239 ◽  
Author(s):  
Jun Qian Li ◽  
Da Meng Liu ◽  
Yan Bin Yao ◽  
Yi Dong Cai ◽  
Xiao Qain Guo ◽  
...  
Keyword(s):  
Coal Seam ◽  
Coalbed Methane ◽  
Adsorptive Capacity ◽  
Qinshui Basin ◽  
Coalbed Gas ◽  
Southern Qinshui Basin ◽  
Exploration And Development

For finding out favorable coalbed methane development districts, the evaluation of geological controls of CBM distribution and accumulation is essential during CBM exploration and development. In this paper, the No. 3 coal seam in the Zhengzhuang coal zone located at southern Qinshui Basin, China, was selected as a focus for comprehensively evaluating geological controls of CBM. The findings of this study are: (1) Coalbed gas contents increase with increasing mudstone roof thickness (ranging from 0-9 m), and will always be as high as 20 m3/t in the coal reservoirs with the mudstone roof thickness greater than about 9 m. (2) The weak transmission and stagnant coalbed water are favorable for CBM accumulation in coal reservoirs resulting from the typical hydraulic preservation of CBM. (3) High coalbed gas contents will commonly occur in vitrinite-rich and low-ash yield coals with high CH4 adsorptive capacity.

A Study on the Occurrence Law of Coal Seam Gas in Shanxi

2012 ◽  
Vol 594-597 ◽  
pp. 2244-2250 ◽  
Author(s):  
Guang Wu Xue ◽  
Hong Fu Liu ◽  
Jing Lin Guo
Keyword(s):  
Coal Seam ◽  
Mining Area ◽  
Magmatic Rock ◽  
Gas Content ◽  
Control Factor ◽  
Coal Seam Gas ◽  
Qinshui Basin ◽  
Mining Areas ◽  
Control Factors ◽  
Open Structures

The thickness of overlaying bedrock is the main control factor of preservation, in addition, magmatic activities, different structural types and hydrogeological conditions are also control factors. Regional magmatic thermometamorphism appeared as a kind of superimposed effect on the background of deep metamorphism. Two Eastwest （EW）metamorphic belts in Shanxi tallied with the distribution of magmatic rock masses, resulting in coal seam gas exploitation and utilization bases of Yangquan and Jincheng mining areas. From gas-accumulation structural setting, closed type structures make high gas content in coal reservoir such as Qinnan, Gujiao, Xingjiashe, Dongshe areas in the Qinshui Basin, Shilou, Daning-Jixian and Sanjiao-Liulin areas in the Hedong Basin, gas content is 10-15 m³/t or even higher. There are convenient channels for coal seam gas effusion in the open structures; with lower gas content, such as Lishi mining area in Hedong Basin, Huoxi structural area in Qinshui Basin, Hunyuan, and Wutai coal districts.

Sign in / Sign up

Export Citation Format

Share Document