Results 41 to 50 of about 1,009,618 (111)

Reservoir Properties and Gas Potential of the Carboniferous Deep Coal Seam in the Yulin Area of Ordos Basin, North China

Energies
In comparison to shallow coal seams, deep coal seams exhibit characteristics of high temperature, pressure, and in-situ stress, leading to significant differences in reservoir properties that constrain the effective development of deep coalbed methane ...
Xianglong Fang, Feng Qiu, Longyong Shu, Zhonggang Huo, Zhentao Li, Yidong Cai   +5 more
doaj   +1 more source

Economic evaluation and investment decision-making process of deep coalbed methane exploration and development projects

Meitan kexue jishu
Deep coalbed methane is a high-quality natural gas resource that has seen rapid exploration and development progress in recent years and holds an extremely promising future.
Youjin DAI, Fengyin XU, Feng WANG, Pengfei MA, Yun YANG, Jian YUN, Jie XU, Xiaoyi SUN, Shan CHENG, Yuxin LI   +9 more
doaj   +1 more source

Characteristics and key technologies of multi-round fracturing transformation of deep coal in Daning-Jixian Block

Meitan xuebao
In the deep coalbed methane (CBM) development in Daning-Jixian block, the application of multi-stage fracturing has significantly increased the gas production and EUR (Estimated Ultimate Recovery) of vertical wells, achieving stable production along with
Chuanqing LIU, Xiaochen WEI, Kunsen BAI, Tong LIU, Weiping ZHU, Lixi LIANG, Huaibin ZHEN, Hanlin TANG   +7 more
doaj   +1 more source

Collapse Pressure Distribution along a Deep Horizontal Coalbed Methane Well in the Daning-Jixian Block

Collapse-pressure estimation is essential for managing wellbore instability in coalbed methane (CBM) drilling, where weak, stress-sensitive coal formations present major operational risks.
Zhao Haifeng, Noshad, Farzand Ali, Sohail Nawab, Muhammad Azam Khan   +4 more
core   +1 more source

Development and Application of Dual-Tubing Jet Pump Full-Process Pressure-Maintained Drainage String in Deep Coal-Rock Gas Wells

Shiyou jixie
Deep coal-rock gas reservoir is sensitive to downhole pressure variation， and implementing kill operation may cause damage to gas production. Consequently， a full-process pressure-maintained operation technique of dual-tubing jet pump for deep coal-rock ...
Wu Jianjun, Wang Yubin, Ma Wentao, Liu Yinhua, Yin Decai, Ma Zhao, Yan Yongwei   +6 more
doaj   +3 more sources

Multi-round diverting fracturing technology and its application in deep coalbed methane in the Daning-Jixian block

The Daning-Jixian block on the eastern margin of the Ordos Basin exhibits high-abundance deep coalbed methane (CBM) resources, well-developed natural fractures of coal reservoirs, well-developed cleats and fractures in coals themselves, coals with ...
Gaojie, CHEN, Wei, SONG, Huaibin, ZHEN, Xianyue, XIONG, Fengyin, XU, Lei, ZHANG, Hai, LIN, Chengwang, WANG, Weiping, ZHU, Shuguang, LI, Zhongbai, LI, Hongna, WANG   +11 more
core   +1 more source

Research on working condition analysis and parameter optimization of hydraulic jet pumps in deep coalbed methane wells: a case study of Daning-Jixian block on eastern margin of Ordos Basin

Youqicang pingjia yu kaifa
Hydraulic jet pumping is a widely used drainage and production technique in the artificial lift stage of deep coalbed methane (CBM) wells. In the early stage of deep CBM development in the Daning-Jixian block, there was generally a lack of systematic ...
WU JIANJUN, MA WENTAO, HAO PENGCHENG, LIU CHENWEI, LIU YINHUA, FENG YANQING, YIN DECAI, ZHANG KANG   +7 more
doaj  

Responses of phytoplankton functional groups to the hydrologic regime in the Daning River, a tributary of Three Gorges Reservoir, China

, 2013
Daning River is a deep tributary of Three Gorges Reservoir (TGR) in China, with water level fluctuations of 30 m annually. It was assumed that the hydrologic regime would be the main driving force in the self-assembling of the phytoplankton community in ...
Zhu, Kongxian, Hu, Zhengyu, Bi, YH (reprint author), Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China., Bi, Yonghong   +3 more
core   +1 more source

Application of five seismic attributes in natural fracture prediction for deep coalbed methane production along the eastern margin of the Ordos Basin

Meitian dizhi yu kantan
BackgroundNatural fractures serve as both the primary storage space for free gas of deep coalbed methane (CBM) and pathways for hydrocarbon migration. Furthermore, these fractures can enhance the porosity and permeability of strata under the deep, high ...
Jiangnan TONG, Feng WANG, Feng ZHANG, Wei HOU, Zhongbai LI, Liang JI, Yanan JIANG, Wei SUN   +7 more
doaj   +1 more source

Supersaturation effect and its characterization in gas-rich intervals of deep coal seams

Meitian dizhi yu kantan
Objective and MethodHigh free gas content serves as a key factor controlling the enrichment and high productivity of deep coalbed methane (CBM). However, its direct determination is challenging, making the accurate identification of free gas-rich coal ...
Lihong ZHOU, Yong LI, Rong DING, Yun LI, Yongzhou LI, Jintao KONG   +5 more
doaj   +1 more source