Results 51 to 60 of about 246,283 (173)

Hydrological control mode and production characteristics of coalbed methane field in Shouyang Block

Meitan kexue jishu, 2023
The relationship between groundwater replenishment, runoff and discharge to the coal seam affects not only the degree of coalbed methane (CBM) enrichment, but also the gas production characteristics of CBM wells.
Fengfeng DU, Xiaoming NI, Yafei ZHANG, Wensheng WANG, Kai WANG   +4 more
doaj   +1 more source

Methodologies for Gas Content Evaluation in Deep Coal/Shale Formations: Assessment, Improvement, and Comparison

Journal of GeoEnergy, Volume 2026, Issue 1, 2026.
Gas‐in‐place (GIP) content is a critical indicator for evaluating deep coal/shale resource potential, typically categorized into lost gas content, desorbed gas content, and residual gas content. The lost gas content cannot be directly quantified and requires specific methods for assessment.
Lingqi Liu, Jun Wang, Shuangfang Lu, Shengxian Zhao, Yongyang Liu, Feng Wang, Hongcheng He, Jihua Xie, Guohui Chen, Nengwu Zhou, Pengfei Zhang, Wenbiao Li, Sun Mengdi   +12 more
wiley   +1 more source

Coalbed methane: resources and recovery [PDF]

, 2013
Gas produced from coal can be subdivided into three categories: coalbed methane (CBM), coal mine methane (CMM) and abandoned mine methane (AMM). CBM is extracted from virgin coal using wells drilled from the surface.
Wójcik, I., Hadro, J.
core  

Evaluation of Present Tectonic Stress Field and Permeability of Coalbed Methane Reservoirs by Inversion of Logging Data From Longtan Formation, Dahebian Block

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, Zhonghu Wu, Wenjibin Sun, Xianchao Yang, Jintao Zhou, Jun Yu, Baofeng Lan   +6 more
wiley   +1 more source

Optimization Design Method and Application of Nitrogen Horizontal Well Drilling Technology in Coalbed Methane Reservoirs

Energy Science &Engineering, Volume 13, Issue 11, Page 5702-5712, November 2025.
Through the independent research and development of nitrogen drilling software, the calculation model of gas injection parameters and friction torque calculation model suitable for coalbed methane nitrogen drilling are established, and the calculation methods of construction parameters such as gas injection volume and injection pressure, friction ...
Hu Jiachen, Tan Zhanglong, Yang Fan, Hao Zhaobing, Yang Qi, Feng Lei, Wang Peng   +6 more
wiley   +1 more source

Discussion on influence of coal body structure on characteristics of methane adsorption−desorption and production in low-rank coal

Meitan kexue jishu
Coalbed methane（CBM） resources are very abundant in China, and the study of CBM reservoir physical properties is of great significance to the and development of low-rank coal coalbed methane.
Wenping JIANG, Xianglan JIN
doaj   +1 more source

A Study on the Heterogeneity Characteristics of Geological Controls on Coalbed Methane Accumulation in Gujiao Coalbed Methane Field, Xishan Coalfield, China

Geofluids, 2021
Commercial exploration and exploitation of coalbed methane (CBM) in Gujiao coalbed methane (CBM) field, Xishan coalfield, have rapidly increased in recent decades. The Gujiao CBM field has shown strong gas distribution heterogeneity, low gas content, and
Taotao Yan, Shan He, Yadong Bai, Zhiyong He, Dameng Liu, Fangui Zeng, Xiaozhen Chen, Xinyu Fu   +7 more
doaj   +1 more source

Quantitative Identification and Distribution Pattern of Macrolithotype of Coal in Deep Coal Seams of the Daji Block

Energy Science &Engineering, Volume 13, Issue 10, Page 4839-4852, October 2025.
ABSTRACT The construction of a logging response model for macrolithotypes in coal has been successfully completed. This model has enabled delineation of vertical and planar distribution patterns of coal macrolithotypes within the #5 and #8 coal seams of the Daji block, as well as to forecast the distribution of favorable reservoir conditions.
Wei Zhang, Liheng Bian, Mingqing Hu, Peng Wu, Tim A. Moore, Jian Shen   +5 more
wiley   +1 more source

Mechanisms behind the controlling effects of temperature-pressure conditions on the dynamic CH4−H2O production from bituminous coal

Meitian dizhi yu kantan
Background For deep coalbed methane (CBM) exploitation, the temperature-pressure synergistic effect in the CH4-H2O two-phase flow remains poorly understood, restricting the establishment of efficient CBM production systems.MethodsThis study investigated ...
Hewei ZHANG, Jian SHEN, Kexin LI, Caifang WU   +3 more
doaj   +1 more source

Bonding-strengthening technology in coalbed cementing through wettability improvement

Natural Gas Industry B, 2018
Coalbeds are characterized by high organic matter content, presence of joints and smooth joint surface, which lead to weak bonding between coal and set cement and poor cementing quality of coalbeds, and consequently the economic and effective development
Chengwen Wang, Fei Zheng, Hansen Sun, Degui Wang, Ruihe Wang, Hongtao Ma   +5 more
doaj   +1 more source