Research on Coal Bed Methane (Gas) Occurrence Controlled by Geological Tectonics in the Southern Margin of North China Plate: A Case Study of the Pingdingshan Coalfield, China

The geological structure is complex in the plate margin zone, and the occurrence of coal bed methane (CBM) is nonuniform with an obvious zoning phenomenon. It plays an important role to reveal the spatial distribution of CBM and its influence factors in plate margin zone for CBM exploitation and gas disaster prevention in coal mines. Based on the data of gas emission during mining, CBM content, and gas pressure in the Pingdingshan Coalfield, lying on the south edge of North China plate, the distribution characteristics of CBM and its influence factors using theories of CBM (gas) geology and statistical analysis method are investigated. The research area is divided into four CBM occurrence belts. There are its own CBM occurrence feature and control structural type in each CBM belt. Likou syncline is the structure that controls the overall distribution of CBM. NW-trending fold-fault belt, Guodishan fault, and Jiaxian fault are the structures that control the CBM occurrence in CBM belt IV, CBM belt II, and CBM belt I, respectively. And the difference in structural types is the main factor of CBM zoning.

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Coal-bed methane geology of the No. 2 coal seam in Fengfeng Coalfield, North China

Arabian Journal of Geosciences ◽

10.1007/s12517-019-4703-7 ◽

2019 ◽

Vol 12 (16) ◽

Cited By ~ 1

Author(s):

Dawei Lv ◽

Changyong Lu ◽

Zhijie Wen ◽

Hongzhu Song ◽

Shuai Yin

Keyword(s):

Coal Seam ◽

North China ◽

Coal Bed ◽

Coal Bed Methane

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Controlling Factors, Accumulation Model and Target Zone Prediction of the Coal-bed Methane in the Huanghebei Coalfield, North China

Resource Geology ◽

10.1111/rge.12044 ◽

2014 ◽

Vol 64 (4) ◽

pp. 332-345 ◽

Cited By ~ 10

Author(s):

Dawei Lv ◽

Jitao Chen ◽

Zengxue Li ◽

Guiqiang Zheng ◽

Cuiyu Song ◽

...

Keyword(s):

North China ◽

Controlling Factors ◽

Coal Bed ◽

Coal Bed Methane ◽

Target Zone ◽

Accumulation Model

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Study on Well Logging Technology with Methods of Evaluating Gas Content of Coal-Bed Methane Reservoir

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1003.183 ◽

2014 ◽

Vol 1003 ◽

pp. 183-187

Author(s):

Huai Jie Yang ◽

He Ping Pan

Keyword(s):

Statistical Analysis ◽

Coal Seam ◽

Well Logging ◽

Langmuir Equation ◽

Gas Content ◽

Coal Bed ◽

High Yield ◽

Coal Bed Methane ◽

Analysis Method ◽

Statistical Analysis Method

In this study, the well logging response of CBM reservoir have been analyzed, and discussing the factors that affect the gas content of coal seam. The well logging technology has been employed in connection with log data and gas content. Take one oilfield’s well logging data for example, statistical analysis method and Langmuir equation method are selected to calculate the gas content of one coal seam, the two calculated results are basically the same, the highest value are about 26 cm3/g, is a high-yield coal seam.

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Evaluation Research on the Hydrogeology Conditions of Coal Bed Methane Row Production

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.295-298.3200 ◽

2013 ◽

Vol 295-298 ◽

pp. 3200-3204

Author(s):

Sheng Li ◽

Xue Hai Fu ◽

Yan Yan Ge

Keyword(s):

Evaluation Research ◽

Indicator System ◽

Geological Structure ◽

System Structure ◽

Coal Bed ◽

Coal Bed Methane ◽

Evaluation Indicator ◽

Condition Evaluation ◽

Evaluation Indicator System

This paper confirms that the mining of the coal bed methane (CBM) are most significantly influenced by the hydrogeology parameters of the reservoir itself, the hydrogeology parameters, the supply properties and the geological structure of the roof and floor and other neighboring water-bearing rocks hydraulically associated with the coal bed as well as the difficulty degree of CBM mining; a evaluation indicator system structure of the hydrogeology conditions are established based on the foresaid conclusions and the CBM mining hydrogeology conditions are divided into “beneficial, moderate and adverse” grades; this paper finally divides the threshold to grade the hydrogeology condition evaluation indicators and a complete CBM mining hydrogeology conditions evaluation indicator system is founded to evaluate the hydrogeology conditions.

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BIO-ENHANCEMENT OF COAL BED METHANE RESOURCES IN THE SOUTHERN SYDNEY BASIN

The APPEA Journal ◽

10.1071/aj02033 ◽

2003 ◽

Vol 43 (1) ◽

pp. 595 ◽

Cited By ~ 16

Author(s):

M. Faiz ◽

L. Stalker ◽

N. Sherwood ◽

A. Saghafi ◽

M. Wold ◽

...

Keyword(s):

Carbon Dioxide ◽

Late Cretaceous ◽

Geological Structure ◽

Gas Content ◽

Coal Bed ◽

Coal Bed Methane ◽

Gas Generation ◽

Biogenic Methane ◽

High Production ◽

Cbm Production

Coals in the Sydney Basin contain large amounts of gas ranging in composition from pure methane (CH4) to pure carbon dioxide (CO2). These gases are derived from thermogenic, magmatic and biogenic sources and their present-day distribution is mainly related to geological structure, depth and proximity to igneous intrusions.A coal bed methane (CBM) study of the Camden area of the Sydney Basin has been jointly conducted by Sydney Gas Company NL (SGC) and the Commonwealth Scientific and Industrial Research Organisation (CSIRO). The delineation of high production fairways is vital for any CBM project development to be commercially successful. An integrated research project employing various methods of reservoir characterisation, including geological, geochemical, geomechanical and gas storage analyses contribute to this delineation for the Camden area, where SGC is currently developing the 300-well Camden Gas Project.In particular, accurate determinations of gas content, saturation levels, composition and origin, as well as interpretations about distribution, are essential for identifying sweet spots for CBM production optimisation. The extent of gas saturation is a function of numerous factors, including amounts of gas generated between the Permian and Late Cretaceous, amounts expelled from the system during Late Cretaceous-Tertiary uplift and amounts of subsequent secondary biogenic methane generated and absorbed in the coals. The extent of this secondary biogenic gas generation appears to be greatest in coals proximal to the basin margins, where meteoric waters carrying bacteria and nutrients had ready access. Significant enhancement of methane content also occurs, however, in deeper parts of the basin where permeable structures exist.The integrated study shows that high production CBM wells drilled to date by SGC are located in zones of enhanced permeability. In these locations original thermogenic wet gases have been removed and additional secondary biogenic methane has been generated due to microbial alteration of coal, hydrocarbons and carbon dioxide. This process has replenished the coals by enhancing the methane contents of the respective seams and this phenomenon can be termed ‘bio-enhancement’ in the context of CBM production.

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