Results 61 to 70 of about 24,392 (174)

Distribution characteristics and exploration and development prospects of coalbed methane resources in Sinopec

Meitan kexue jishu
Exploration breakthroughs of deep coalbed methane (CBM) in the Ordos Basin have driven rapid industry development since 2019. Based on the characteristics of complex coalbed methane (CBM) resource types and strong spatial heterogeneity of reservoir ...
Dehua ZHOU, Gang CHEN, Shihu ZHAO, Baojian SHEN, Zengqin LIU, Jincheng YE, Xinjun CHEN, Jiaqi ZHANG   +7 more
doaj   +1 more source

Quantitative Mechanisms of Long-Term Drilling-Fluid–Coal Interaction and Strength Deterioration in Deep CBM Formations

Processes
During deep coalbed methane (CBM) drilling, wellbore stability is significantly influenced by the interaction between drilling fluid and coal rock. However, quantitative data on mechanical degradation under long-term high-temperature and high-pressure conditions are lacking.
Qiang Miao, Hongtao Liu, Yubin Wang, Wei Wang, Shichao Li, Wenbao Zhai, Kai Wei   +6 more
openaire   +1 more source

Schottky barrier formation and band bending revealed by first principles calculations

, 2015
An atomistic insight into potential barrier formation and band bending at the interface between a metal and an n-type semiconductor is achieved by ab initio simulations and model analysis of a prototype Schottky diode, i.e., niobium doped rutile titania ...
Fang, Yurui, Gao, Shiwu, Hellman, Anders, Jiao, Yang, Käll, Mikael   +4 more
core   +1 more source

Multi-Field Coupling Models of Coal and Gas and Their Engineering Applications to CBM in Deep Seams: A Review

Energies
In the process of deep coal seam mining, the problem of coal–gas compound disasters is increasingly prominent, with the safe and efficient extraction of gas serving as the key to disaster reduction. A deep coal seam gas extraction project is a complex coupled system involving multiple physical fields, such as stress fields, gas flow fields, and energy.
Xingying Ma, Aitao Zhou, Xiaoyu Cheng, Cheng Cheng, Wei Zhao   +4 more
openaire   +2 more sources

Gas Content and Gas Occurrence Mechanism of Deep Coal Seams in the Shenfu-Linxing Block

Energies
The Shenfu-Linxing block in the Ordos Basin holds abundant deep coalbed methane (CBM) resources, which can alleviate gas shortages and aid dual carbon target achievement. Considering isothermal adsorption traits and parameters like vitrinite reflectance,
Litao Ma, Fan Yang, Jianghao Yang, Yi Cui, Wei Wang, Cheng Liu, Bo Zhang, Jiang Yang, Shu Tao   +8 more
doaj   +1 more source

Evaluation of geological engineering factors for productivity of deep CBM well after fracturing based on grey correlation method

Youqicang pingjia yu kaifa, 2023
Coal-bed methane reservoirs are characterized by low porosity, low permeability and low pressure, making their industrial exploitation primarily reliant on techniques like hydraulic fracturing. Currently, more than 50 percent of the gas wells in the Shizhuang block in the Qinshui Basin currently produce less than 500 m3/d of coal bed methane.
openaire   +1 more source

Research progress and breakthrough directions of the key technical fields for large scale and efficient exploration and development of coalbed methane in Xinjiang

Meitan xuebao
The Xinjiang Uygur Autonomous Region has presented the expected resource conditions and work foundations for a large-scale coalbed methane (CBM) exploration and development, which shows that its CBM resources below the depth of 2000 m are 7.5 trillion m3,
Shuxun SANG, Ruiming LI, Shiqi LIU, Xiaozhi ZHOU, Bo WEI, Sijie HAN, Sijian ZHENG, Fansheng HUANG, Tong LIU, Yuejiang WANG, Shuguang YANG, Dapeng QIN, Zixin ZHOU   +12 more
doaj   +1 more source

Geological characteristics of deep coal rock and main geological factors controlling coalbed methane enrichment: a case study of the M area in the eastern Ordos Basin

Shiyou shiyan dizhi
The 8# thick coal seam is widely distributed with high organic matter thermal maturity at the top of the Upper Carboniferous Benxi Formation in the M area of the Ordos Basin.
Xiaojiao GUO, Lei WANG, Xianzhou YAO, Xu LI, Linke ZHANG, Xiaoshuang WANG   +5 more
doaj   +1 more source

Evaluation of recoverable potential of deep coalbed methane in the Linxing Block, Eastern Margin of the Ordos Basin

Scientific Reports
The deep coalbed methane (CBM) resources are widely developed in the Linxing Block. However, the evaluation of CBM geological areas suitable for CBM exploitation remains unexplored, hindering further development.
Bo Chen, Song Li, Dazhen Tang, Yifan Pu, Guanghao Zhong   +4 more
doaj   +1 more source

Analysis of Occurrence of Deep Coalbed Methane and Its “Desorption–Diffusion–Seepage” Process

Separations
China has abundant deep coalbed methane (CBM) resources; however, high temperature, stress, and reservoir pressure complicate the gas adsorption–desorption–diffusion–seepage processes, severely restricting the development of deep CBM.
Bingwen Zhang, Tao Jiang, Li Niu, Sha Li, Shu Tao   +4 more
doaj   +1 more source