Results 71 to 80 of about 588,838 (198)

Sweet-spot prediction about coalbed methane development in the areas with complex hydrogeological conditions

Meikuang Anquan
In the area with complex hydrogeological conditions, the water abundance of surrounding rock and the amount of replenishment to the coal seam is of an important impact on the propagation speed of pressure in the coal seam during drainage, and are the key
Yafei ZHANG, Fengfeng DU, Zhiyu DENG, Baojiang DUAN, Dong HAN   +4 more
doaj   +1 more source

Chemical enhanced oil recovery from shale‐rich tight carbonate reservoirs using 2‐butoxyethanol as a mutual solvent and diluted seawater

The Canadian Journal of Chemical Engineering, Volume 103, Issue 5, Page 2119-2135, May 2025.
This graphical abstract shows the experiments conducted, including interfacial tension, contact angle, oil swelling and production under imbibition, along with graphs presenting the results. Abstract Oil production from tight reservoirs due to their very low permeability and high capillary pressure requires complex operations and materials, so that ...
Iman Nowrouzi, Amir H. Mohammadi, Abbas Khaksar Manshad   +2 more
wiley   +1 more source

Methane and dust controls for longwalls : Pocahontas no.3 coalbed, Grundy, Virginia [PDF]

"The periphery of longwall panels in the Pocahontas No. 3 Coalbed is characterized by a zone of reduced permeability that inhibits the natural drainage of methane. A residual gas pressure of 105 psig was measured after 1 year in an isolated block of coal

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Pathways for Potential Exposure to Onshore Oil and Gas Wastewater: What We Need to Know to Protect Human Health

GeoHealth, Volume 9, Issue 4, April 2025.
Abstract Produced water is a chemically complex waste stream generated during oil and gas development. Roughly four trillion liters were generated onshore in the United States in 2021 (ALL Consulting, 2022, https://www.gwpc.org/wp‐content/uploads/2021/09/2021_Produced_Water_Volumes.pdf). Efforts are underway to expand historic uses of produced water to
Ayusha Ariana, Isabelle Cozzarelli, Cloelle Danforth, Bonnie McDevitt, Anna Rosofsky, Donna Vorhees   +5 more
wiley   +1 more source

Drilling a horizontal coalbed methane drainage system from a directional surface borehole [PDF]

"Three long horizontal holes were drilled from a directionally drilled surface hole at the Emerald Mine near Waynesburg, Pennsylvania. The purpose was to adapt the technique of directional drilling for use in draining methane from coalbeds.

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Methane control for underground coal mines [PDF]

"Ventilation has long been the primary means of controlling methane emissions in underground coal mines. However, as mining has progressed into gassier areas of U.S.

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Methane migration characteristics of the Pocahontas No. 3 coalbed [PDF]

"Methane-flow and pressure data taken from a mine in the Pocahontas No. 3 Coalbed are compared with flow rates from lump coal obtained in laboratory experiments.

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Target Area Selection for Residual Coalbed Methane Drainage in Abandoned Multi-Seam Mines

Applied Sciences
To optimize the location optimization of the coalbed methane (CBM) extraction target area in abandoned mines, based on the background of the Songzao mining area in Chongqing, theoretical analysis and numerical simulation research methods were comprehensively used to systematically evaluate the potential of residual CBM resources in the goaf of the ...
Gen Li, Yaxin Xiu, Qinjie Liu, Bin Zhang, Minke Duan, Youxing Yang, Chenye Guo   +6 more
openaire   +1 more source

Prediction of productivity and co-drainage trial of bilayer vertical coalbed methane wells: Cases study of the southwest of Zhengzhuang Block, Qinshui Basin

Youqicang pingjia yu kaifa, 2022
The bilayer or multilayer co-drainage is an important approach to improve the single well production. In order to improve the drainage efficiency of bilayer drainage wells in Zhengzhuang Block of southern Qinshui Basin, the drainage data and co-drainage ...
JIA Huimin, HU Qiujia, ZHANG Cong, ZHANG Wensheng, LIU Chunchun, MAO Chonghao, WANG Yan   +6 more
doaj  

Coal and Coalbed Methane Co-Extraction Technology Based on the Ground Movement in the Yangquan Coalfield, China

Energies, 2015
The Yangquan coalfield is one of the typical highly gassy mining areas in China. However, its coal seams are of lower permeability, which are not conductive to coalbed methane (CBM) drainage.
Guozhong Hu, Jialin Xu, Fuxi Zhang, Changchun Zhao, Wei Qin, Yiran Zhu   +5 more
doaj   +1 more source