Geological controls on coalbed methane reservoir capacity and gas content

Colabed methane system is a natural system that consists of coal seams, coalbed methane in them and surrounding rocks. As an unconventional natural gas, reservoir and conservation of coalbed methane are different from those of conventional hydrocarbon. The Qinshui Basin, covering an area about 30,000sq.km in southeastern Shanxi Province, has abundant coalbed methane resources in the carboniferous Taiyuan formation and permian Shanxi formation, with an in-situ methane resource 3.3×1012 m3.In this study, the structural deformation and tectonic evolution of coalbed methane system in Qinshui basin were reported. Relationships between structural deformation and the formation of coalbed methane reservoir in Qinshui Basin were also discussed. The results show that Yangquan-Shouyang area in the north part of the basin and Tunliu-Xiangyuan area in the east are favorable for formation coalbed methane system. In contrast, Jincheng-Qinshui area in the south part of basin and the Qinyuan area in the middle of basin are favorable for both the formation of coalbed methane reservoirs and high yields as well.

Download Full-text

Analogy Analysis of Coalbed Methane Reservoir-Forming Conditions in Jixi Basin

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.733.96 ◽

2015 ◽

Vol 733 ◽

pp. 96-99 ◽

Cited By ~ 1

Author(s):

Yu Shuang Hu ◽

Yu Gang Hao ◽

Hui Ting Hu

Keyword(s):

Coalbed Methane ◽

The United States ◽

Gas Content ◽

Burial Depth ◽

Oil Drilling ◽

Black Warrior Basin ◽

Reservoir Conditions ◽

Coalbed Methane Reservoir ◽

Dip Angle ◽

Coal Reservoir

Based on coalbed methane geology theory, make use of coal and oil drilling data, from both of the coal reservoir characteristics and conservation conditions, Through comparative analysis of a number of geological factors of coalbed thickness, burial depth, metamorphic grade, gas content, roof and floor lithology, dip angle, etc, and found that there are many similarities between Jixi Basin and Black Warrior Basin in the United States of coalbed methane reservoir conditions. Compared to Black Warrior Basin, the advantages of Jixi Basin are that the coal metamorphism degree is high, the tired and single coalbed are thick, the closeness of roof and floor are good, the fault development and coalbed gas content are similar to it; the disadvantages of Jixi Basin are that the formation dip angle is large, the pressure gradient and permeability are small.

Download Full-text

A Methodology to Estimate Proximate and Gas Content Saturation with Lithological Classification in Coalbed Methane Reservoir, Bokaro Field, India

Natural Resources Research ◽

10.1007/s11053-021-09828-2 ◽

2021 ◽

Author(s):

Abir Banerjee ◽

Rima Chatterjee

Keyword(s):

Coalbed Methane ◽

Gas Content ◽

Coalbed Methane Reservoir

Download Full-text

Geological Characteristics of Coalbed Methane Reservoir in Southern Shizhuang Block, Southeastern Qinshui Basin

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.3209 ◽

2013 ◽

Vol 295-298 ◽

pp. 3209-3212

Author(s):

Li Ren Xing ◽

Yan Bin Yao ◽

Da Meng Liu ◽

Jun Gang Liu ◽

Lu Lu Zhou ◽

...

Keyword(s):

Coal Seam ◽

Local Structure ◽

Coalbed Methane ◽

Simple Structure ◽

Gas Content ◽

Burial Depth ◽

Coal Seams ◽

Structure Characteristics ◽

Geological Characteristics ◽

Coalbed Methane Reservoir

Southern Shizhuang Block has simple structure characteristics, relatively thick coal seams (3.1-10.5 m, 6 m in average), and favorable burial depth (450-900 m). The gas content of the No.3 coal seam in the Shanxi formation ranges from 6-20 m3/t, and it increases from the southeast to northwest area in the southern Shizhuang Block. Gas content is high in the structural low in the area, which means the gas accumulation is controlled by the geological characteristics of local structure and hydrogeologic conditions.

Download Full-text