Results 61 to 70 of about 5,928 (182)

Analysis of low-efficiency wells in CBM gas field of South Yanchuan and optimization of measures

, 2020
The low-yield and low-efficiency wells in the deep coal seam gas field of South Yanchuan are of high proportion and the reasons for low-yield are complex, so that it is difficult to achieve the expected development effect.
XIAO Cui, CHEN Zhenlong, JIN Xiaobo, LI Xin   +3 more
core   +1 more source

Factors influencing the production of coalbed methane from deep reservoirs

Meitian dizhi yu kantan
ObjectiveThe production characteristics of coalbed methane (CBM) from deep reservoirs differ significantly from those of CBM from shallow reservoirs.
Zhenzhi WANG, Xuehai FU, Jienan PAN, Yi JIN, Haichao WANG   +4 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

Constant volume CBM reservoirs: An important principle

, 2009
Much research and many field trials have shown that the permeability of coal seams varies inversely with the effective stress acting on coal. It was later theorized by Gray (1992) that desorption-induced matrix shrinkage may counter-act the effect of ...
Rudolph, Victor, Massarotto, Paul, Golding, Suzanne D.   +2 more
core  

Utilization strategies for deep coal-measure reservoirs with different stacking patterns in Linxing block, Ordos Basin

Shiyou shiyan dizhi
The Linxing block in the Ordos Basin has entered the stage of co-production of tight gas and coalbed methane (CBM), and the stacking patterns of tight sandstone and coal seams directly affect the production methods.
Lichun SUN, Jia LIU, Xinze LI, Le SUN, Maojun FANG, Na LI, Weipeng FAN   +6 more
doaj   +1 more source

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

Optimization Design of Deep-Coalbed Methane Deliquification in the Linxing Block, China

The production of deep-coalbed methane (CBM) wells undergoes four stages sequentially: drainage depressurization, unstable gas production, stable gas production, and gas production decline.
Wenbo Jiang, Haifeng Zhang, Yongsheng An, Bing Zhang   +3 more
core   +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

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

Table1_The primary controlling factors of the occurrence state of deep high-rank coalbed methane in eastern Ordos Basin.XLSX

Introduction: This study investigates the key controlling factors of the occurrence state of deep coalbed methane (CBM). CBM is an abundant energy resource in China, particularly in deep coal seams.
Yujiang Shi (17826140), Yufei He (2308198), Jianmeng Sun (17826146), Jinbin Wan (17826143), Ruikang Cui (17826149), Jingbo Zeng (9358586)   +5 more
core   +1 more source