Results 171 to 180 of about 588,838 (198)

Influence of Coalbed Characteristics and Geology on Methane Drainage

SPE Unconventional Gas Recovery Symposium, 1980
ABSTRACT Methane drainage in advance of mining using horizontal holes continues to expand. Interpretation of coalbed characteristics and geology in relation to drilling procedures and gas flows will provide additional information for further development of this technique.
Gerald Finfinger, Leonard Prosser, Joseph Cervik   +2 more
openaire   +1 more source

Exploration of Coalbed Methane Exploitation and Coal Mine Gas Drainage

Applied Mechanics and Materials, 2013
Coalbed methane (CBM) resources are abundant on the earth. CBM brings man-kind harm but its also a clean type of resource. This article based on the analysis of CBM exploitation and utilization at home and abroad, analyzed the key issues for the slow development of CBM industry in China combining the domestic practical situation of coal mine gas ...
Shang Quan Ma, Jing Fu
openaire   +1 more source

Mechanism and application of pulse hydraulic fracturing in improving drainage of coalbed methane

Journal of Natural Gas Science and Engineering, 2017
Abstract Traditional hydraulic fracturing (THF) has become an effective stimulation method for the extraction of coalbed methane (CBM) and has attained many remarkable achievements in the application. However, certain problems, such as greater water pressure, larger volume of fracturing equipment, and a stricter sealing requirement, have gradually ...
Jizhao Xu, Cheng Zhai, Lei Qin
openaire   +1 more source

Drilling Long Horizontal Coalbed Methane Drainage Holes from a Directional Surface Borehole

SPE Unconventional Gas Recovery Symposium, 1980
ABSTRACT Three primary horizontal methane drainage holes totaling 2,428.4 meters (7,967 feet) have been completed in the Pittsburgh coalbed from a directional surface borehole. Directional control and sidetracking techniques developed during the project increased the horizontal drilling rate from 24.4 meters (80 feet) per day initially ...
William Diamond, David Oyler
openaire   +1 more source

Modeling and Prediction for Gas Production During Coalbed Methane Drainage Based on Two Indirect Reservoir Parameters

Energy Exploration and Exploitation, 2018
Two indirect parameters influencing coalbed methane (CBM) drainage performances are proposed in this paper, which are effective desorption radius and difference between reservoir pressure and critical desorption pressure (DRPCDP).
Mingjun Zou
exaly   +2 more sources

Methane Drainage from the Mary Lee Coalbed, Alabama, Using Horizontal Drilling Techniques

SPE Unconventional Gas Recovery Symposium, 1980
ABSTRACT The Bureau of Mines has developed several techniques for draining methane from coalbeds in advance of mining. Drilling long horizontal holes from an underground location is one of these techniques which has been successfully demonstrated in the Pittsburgh and Sunnyside coalbeds.
John Perry, Leonard Prosser Jr., Joseph Cervik   +2 more
openaire   +1 more source

Characterization and Quantification of Mining-Induced Fractures in Overlying Strata: Implications for Coalbed Methane Drainage

Natural Resources Research, 2019
Coalbed methane (CBM) production in the overlying strata of coal reservoirs is often hampered by the unknown distribution of the mining-induced fractures. Mining-induced fractures are CBM migration pathways in the fractured overlying strata, and the excavation of coal seams within a mine causes the CBM in adjacent coal seams to flow into the overlying ...
Bichuan Zhang, Haitao Sun, Yunpei Liang, Kequan Wang, Quanle Zou   +4 more
openaire   +1 more source

Drainage feature about coalbed methane wells in different hydrogeological conditions in Fanzhuang area

Journal of Coal Science and Engineering (China), 2012
It is an important guarantee to enhance the production of coalbed methane (CBM) and reduce the project investment by finding out the drainage feature about CBM wells in different hydrogeological conditions. Based on the CBM exploration and development data on the Fanzhuang block in southeast Qinshui Basin and combined with the seepage principle and ...
Xiao-ming Ni, Ran Lin, Yan-bin Wang
openaire   +1 more source

Coal Fines Migration, Deposition, and Output Simulation during Drainage Stage in Coalbed Methane Production

Energy & Fuels, 2021
Fracture and cleats development controls the permeability of coal reservoirs, while the migration of coal fines can block fractures and affect coalbed methane (CBM) production performance.
Wenlong Han, Yanbin Wang, Yong Li, Xiaoming Ni, Xiang Wu, Jianghao Yang, Shihu Zhao   +6 more
openaire   +1 more source

Optimum location of surface wells for remote pressure relief coalbed methane drainage in mining areas

Mining Science and Technology (China), 2010
Abstract Based on engineering tests in the Huainan coal mining area, we studied alternative well location to improve the performance of surface wells for remote pressure relief of coalbed methane in mining areas. The key factors, affecting location and well gas production were analyzed by simulation tests for similar material.
Huazhou HUANG, Shuxun SANG, Liangcai FANG, Guojun LI, Hongjie XU, Bo REN   +5 more
openaire   +1 more source