Results 61 to 70 of about 588,838 (198)
Energy Science &Engineering, Volume 13, Issue 11, Page 5198-5217, November 2025.ABSTRACT The permeability of coal reservoirs is predominantly controlled by the present tectonic stress field. This study systematically integrates macro‐ and micro‐scale analytical methods to investigate the controlling mechanisms of tectonic stress on pore‐fracture characteristics and permeability in the Longtan Formation coal reservoirs.
Guoqing He +6 more
wiley +1 more source
A Rapid Method for the Determination of Coal Seam Gas Pressure Based on Raw Coal Adsorption
Energy Science &Engineering, Volume 13, Issue 10, Page 4660-4673, October 2025.The method flow of coal seam gas pressure measurement based on raw coal gas adsorption is introduced. ABSTRACT The residual gas pressure of pre‐pumped coal seams is one of the key indices to check the effect of regional outburst prevention. The success rate in direct measurement is low, and it is generally obtained indirectly by use of the Langmuir ...
Kuan Wu +7 more
wiley +1 more source
Investigation of Similarities Between Methane Drainage Potential of Utah's Sunnyside Coalbed and Eastern U.S. Coalbeds [PDF]
An investigation of the effectiveness of methane drainage in the lower Sunnyside coalbed at Kaiser Steel Corp. Sunnyside No. 1 Mine in Utah. Most previous attempts to drain methane gas using long horizontal holes were conducted in the eastern coal provi..
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Evaluation of coalbed methane drainage effect for multi-target seams in Jincheng region
, 2019 The study of the multi-target seams drainage effect on coalbed methane wells has great value, including coal safe mining, underground gas control, determination of development technical indicators, single well production, rational division of development
Chaoshuai, WANG +5 more
core +1 more source
Energy Science &Engineering, Volume 13, Issue 7, Page 3631-3643, July 2025.ABSTRACT To investigate the hydraulic fracturing mechanism of high‐fluid wells in the Yangquan mining area, coal seams from the Xinyuan and Xinjing mines were selected as research subjects. Experiments were conducted using the TCQT‐III low‐permeability coalbed gas‐phase displacement and production enhancement apparatus, along with the FINESORB‐3120 ...
Zhou Zhang +7 more
wiley +1 more source
ChemistryOpen, Volume 14, Issue 7, July 2025.This review explores the integration of biomass‐derived carbon nanomaterials in green enhanced oil recovery (GEOR) techniques. It highlights the challenges of conventional chemical EOR, emphasizing the environmental benefits of carbon dots, carbon nanotubes, and graphene derivatives.
Ruhul Amin Foisal +2 more
wiley +1 more source
Degasification Study from an Air Shaft in the Beckley Coalbed [PDF]
"The Bureau of Mines conducted research to degasify a virgin block of coal in the Beckley coalbed using long horizontal holes drilled in an array from the bottom of a ventilation air shaft. Eight horizontal holes and an in situ pressure hole were drilled
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Energy Science &Engineering, Volume 13, Issue 6, Page 2842-2855, June 2025.ABSTRACT Extracting gas from low‐permeability coal seams is essential for mine safety and efficiency. To address this challenge, a novel technique combining hydraulic fracturing and dissolution was proposed. The feasibility of this method was verified through simulations based on the distinct element method.
Yun Lei +3 more
wiley +1 more source
Rotary drilling techniques used in the Beckley coalbed [PDF]
"The U.S. Bureau of Mines used a contact drilling strategy with short- collared assemblies in order to rotary drill long horizontal methane drainage holes in the Beckley coalbed near Glen Daniel, West Virginia. By decreasing the thrust and increasing the
core +2 more sources