Results 21 to 30 of about 79 (60)

Evaluation of the Accumulation Conditions and Favorable Areas of Shale Gas in the Upper Palaeozoic Marine‐Continental Transitional Facies in the Daning‐Jixian Area, Ordos Basin

Geofluids, Volume 2022, Issue 1, 2022., 2022
This study focuses on the organic‐rich mud shale in the Upper Palaeozoic transitional facies in the southeastern margin of the Ordos Basin. It systematically analyzes the shale gas accumulation conditions of the organic‐rich mud shale in the Lower Permian Shanxi‐Taiyuan Formation, including the thickness, distribution, organic matter type and content ...
Xu Zeng, Wei Wang, Qian Cao, Shangwen Zhou, Guodong Dong, Aiming Wang, Zhixin Chen, Hua Mei, Afshin Davarpanah   +8 more
wiley   +1 more source

Study on Downhole Throttling Characteristics of High Water Content Gas

Geofluids, Volume 2022, Issue 1, 2022., 2022
In order not to hinder gas production, we usually hope that the bottom hole effusion can be discharged to the surface with high‐pressure natural gas. For the production data of high water content gas wells, the problems of insufficient water content and liquid‐carrying capacity affecting gas well production should be considered.
Jie Zheng, Zhenzhen Li, Yihua Dou, Yarong Zhang, Cheng Bi, Xu Yang, Jiahui Li, Steffen Berg   +7 more
wiley   +1 more source

A Comparative Study of the Micropore Structure between the Transitional and Marine Shales in China

Geofluids, Volume 2021, Issue 1, 2021., 2021
To compare the micropore structure of marine‐continental transitional shale with marine shale, organic geochemical, field emission scanning electron microscopy, and low‐temperature nitrogen adsorption experiments were conducted on shale samples from the Shanxi Formation in the eastern Ordos Basin and the Longmaxi Formation in the southern Sichuan Basin.
Pengfei Jiao, Genshun Yao, Shangwen Zhou, Zhe Yu, Shiluo Wang, Zhiye Gao   +5 more
wiley   +1 more source

Characteristics Evolution of Multiscale Structures in Deep Coal under Liquid Nitrogen Freeze‐Thaw Cycles

Geofluids, Volume 2021, Issue 1, 2021., 2021
Liquid nitrogen freeze‐thaw fracturing has attracted more and more attention in improving the coal reservoir permeability. In order to reveal the impact of liquid nitrogen freeze‐thaw on the multiscale structure of deep coal, the multiscale structure evolution law of deep and shallow coal samples from the same seam in the Qinshui coalfield during the ...
Yingfeng Sun, Yixin Zhao, Yulin Li, Nima Noraei Danesh, Zetian Zhang, Yong liu   +5 more
wiley   +1 more source

Factors influencing productivity and production system optimization for deep coalbed methane in the Daning-Jixian block, Ordos Basin

Meitian dizhi yu kantan
ObjectiveDeep coalbed methane (CBM) reservoirs are characterized by ultra-low porosity, ultra-low permeability, and super saturation, rendering it impractical to copy the productivity models of shallow coalbed methane and shale gas.
Haifeng ZHAO, Zhaojie JIA, Mengqi CHEN, Ziyi YANG, Bin WANG, Hongliang LIN, Yanfeng YANG   +6 more
doaj   +1 more source

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

Prediction of Influencing Factors on Estimated Ultimate Recovery of Deep Coalbed Methane: A Case Study of the Daning–Jixian Block

Processes
China has vast amounts of deep coalbed methane resources but is still in the early stage of deep coalbed methane development; thus, it lacks mature gas exploitation and development theories and technologies, particularly effective methods for evaluating final recoverable reserves.
Feng Wang, Mansheng Wu, Yuan Wang, Wei Sun, Guohui Chen, Yanqing Feng, Xiaosong Shi, Zengping Zhao, Ying Liu, Shuangfang Lu   +9 more
openaire   +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

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