Influence Of Coal Lithotypes On Adsorption/Desorption Characteristics In Coal Reservoirs And Its Practical Significance: A Case Study In Baode Block,
2022
China United Coalbed Methane National Engineering Research Center Co., Ltd., Beijing 100095, China; PetroChina Coalbed Methane Company Limited, Beijing 100028, China
Influence Of Coal Lithotypes On Adsorption/Desorption Characteristics In Coal Reservoirs And Its Practical Significance: A Case Study In Baode Block, Hou Wei, Xu Fengyin, Zhang Lei, Zhang Wei, Meng Yanjun, Liu Qihu, Li Yongchen, Fan Hongbo, Wang Hongya, Zhang Shuangyuan, Zhang Wen
Coal Geology & Exploration
The difference of coal lithotypes is an important factor affecting the adsorption/desorption characteristics of coalbed methane (CBM) and the productivity of CBM wells. According to four coal samples of different lithotypes from No. 8+9 Coal Seam in Well BX-2, proximate analysis, maceral, wettability and isothermal adsorption/desorption experiments are carried out, and the influence of coal lithotypes on CBM adsorption/desorption characteristics and its mechanism is discussed. The results show that vitrinite content in dull, semi-dark, semi-bright and bright coal samples increases gradually, water and ash content decreases gradually, hydrophilicity decreases gradually, and the Langmuir volume increases gradually. Bright and semi-bright coal …
Table Of Contents,
2022
China Coal Technology and Engineering Group (CCTEG)
Progress Of Coalbed Methane Exploration And Development In China During The 13th Five-Year Plan Period And The Next Exploration Direction,
2022
China National Offshore Oil Co., Ltd., Beijing 100010, China
Progress Of Coalbed Methane Exploration And Development In China During The 13th Five-Year Plan Period And The Next Exploration Direction, Ye Jianping, Hou Songyi, Zhang Shouren
Coal Geology & Exploration
Based on survey data of coalbed methane exploration and development projects in China, the production status of coalbed methane fields and scientific & technological achievements, this paper analyzes the comprehensive control technical measures for stable and increasing production of coalbed methane fields, and the geological conditions and potential of deep coalbed methane exploration breakthrough. The coalbed methane horizontal well technology and the matching well pattern optimization and drainage technology are also summarized. The results show that the most effective technical measures for the comprehensive control of stable production of coalbed methane fields and low production wells in China are four …
Research Progress And Development Direction Of Key Technologies For Efficient Coalbed Methane Development In China,
2022
China United Coalbed Methane National Engineering Research Center Co., Ltd., Beijing 100095, China; PetroChina Coalbed Methane Company Limited, Beijing 100028, China;
Research Progress And Development Direction Of Key Technologies For Efficient Coalbed Methane Development In China, Xu Fengyin, Yan Xia, Lin Zhenpan, Li Shuguang, Xiong Xianyue, Yan Detian, Wang Hongya, Zhang Shuangyuan, Xu Borui, Ma Xinyuan, Bai Nan, Mei Yonggui
Coal Geology & Exploration
During the 13th Five Year Plan period, the major problem of the low output of a single well of coalbed methane (CBM) has restricted the efficient development of CBM in China. Through Major National Science and Technology Projects and other technical researches, significant progress has been made in the theoretical understanding and engineering technology of CBM exploration and development. It is manifested in four aspects as follows. Firstly, the exploration concept has changed from looking for rich dessert areas to high-yield dessert areas, and the extensive development deployment has become finer. Secondly, in terms of efficient stimulation technology, with the …
Exploration And Development Process Of Coalbed Methane In Eastern Margin Of Ordos Basin And Its Enlightenment,
2022
PetroChina Coalbed Methane Company Limited, Beijing 100028, China; China United Coalbed Methane National Engineering Research Center Co., Ltd., Beijing 100095, China
Exploration And Development Process Of Coalbed Methane In Eastern Margin Of Ordos Basin And Its Enlightenment, Yang Xiuchun, Xu Fengyin, Wang Hongya, Li Shuguang, Lin Wenji, Wang Wei, Hao Shuai
Coal Geology & Exploration
The buried depth of coal seam in the eastern margin of Ordos Basin changes greatly, and the characteristics of coalbed methane reservoir formation and reservoir reconstruction methods vary greatly with different buried depths. At present, coalbed methane exploration gradually extends from a shallow area of 1 000 m to a deeper area of 2 000 m. To study the theory and technology of efficient exploration and development of coalbed methane resources under different burial depths, this paper reviews the exploration and development practices in the eastern margin of Ordos Basin in the past 30 years. According to the changes of …
Review Of The Progress Of Geological Research On Coalbed Methane Co-Production,
2022
College of Geology and Environment, Xi’an University of Science and Technology, Xi’an 710054, China; Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation, Xi’an 710054, China; Geological Research Institute for Coal Green Mining, Xi’an University of Science and Technology, Xi’an 710054, China
Review Of The Progress Of Geological Research On Coalbed Methane Co-Production, Guo Chen, Qin Yong, Yi Tongsheng, Ma Dongmin, Wang Shengquan, Shi Qingmin, Bao Yuan, Chen Yue, Qiao Junwei, Lu Lingling
Coal Geology & Exploration
Coalbed methane (CBM) co-production is an important way to improve the efficiency of CBM development in multi-seam areas, but the special nature of reservoir formation makes the co-mining method and production effect complex and variable, which presents challenges for efficient development. Experts in the field of CBM from China have carried out a lot of basic research and engineering practice on CBM reservoir formation and the feasibility of co-production in multiple seams, which have gained fruitful results, providing strong support for deepening the CBM geological theory and promoting industrial development. To provide reference for subsequent research, engineering implementation and industrial …
Research Progress Of Multi-Source And Multi-Stage Genesis Of Co2-Enriched Cbm And The Enlightenments For Its Exploration And Development,
2022
School of Energy Resource, China University of Geosciences(Beijing), Beijing 100083, China; Coal Reservoir Laboratory of National Engineering Research Center of CBM Development & Utilization, Beijing 100083, China; Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China
Research Progress Of Multi-Source And Multi-Stage Genesis Of Co2-Enriched Cbm And The Enlightenments For Its Exploration And Development, Tang Shuling, Tang Dazhen, Sun Bin, Tao Shu, Zhang Taiyuan, Pu Yifan, Zhang Aobo, Zhi Yuanhao
Coal Geology & Exploration
CO2-enriched coalbed methane(CBM) carries important geological information on CBM genesis and accumulation, and is closely related to the exploration and evaluation of CBM resources. On the basis of the systematic summary of the current research progress of CBM genesis, the current research status of the genetic mechanism of CO2-enriched CBM reservoirs was scientifically analyzed by dissecting the special geological examples of CO2-enriched CBM reservoirs in the southern Junggar Basin, and the problems in the research process of CBM genesis were comprehensively pointed out. The study shows that the generation of CBM has multiple sources …
Enrichment Theory Of Large Area And High Abundance Marine Shale Gas And Its Geological Evaluation Technology Progress And Application,
2022
PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China; National Energy Shale Gas R & D(Experiment)Center, Beijing 100083, China
Enrichment Theory Of Large Area And High Abundance Marine Shale Gas And Its Geological Evaluation Technology Progress And Application, Wang Hongyan, Liu Dexun, Yu Yuanjiang, Zhao Qun, Qiu Zhen, Dong Dazhong, Shi Zhensheng, Sun Shasha, Jiang Zhenxue, Liu Honglin, Zhou Shangwen, Bai Wenhua
Coal Geology & Exploration
The enrichment characteristics and main controlling factors of marine shale gas, geological evaluation and comprehensive area selection of sweet spots are the core content and key to the breakthrough of shale gas exploration and development in Sichuan Basin and its periphery. On the basis of intensive study of geology and geophysical multidisciplinary joint research, field investigation, survey and sampling analysis of key outcrops, core observation and fine description of key exploration wells, this paper presents the enrichment theory and connotation of geological evaluation technology of large area and high abundance shale gas as well as its recent advances, field applications …
Theoretical Basis Of Dredging And Efficient Development Of High−Rank Coalbed Methane In China: A Case Study Of The Qinshui Basin,
2022
PetroChina Huabei Oilfield Company, Renqiu 062552, China
Theoretical Basis Of Dredging And Efficient Development Of High−Rank Coalbed Methane In China: A Case Study Of The Qinshui Basin, Zhu Qingzhong
Coal Geology & Exploration
China is rich in high-rank coalbed methane(CBM) resources, which accounts for more than 90% of the total production of CBM in China. The efficient development and utilization of high-rank coal and coalbed methane(CBM) resources is of great practical significance for ensuring national energy strategic security and helping to achieve the strategic goals of “carbon peak and carbon neutrality”. The coalbed methane industry in China is generally characterized by low exploration and development degree, poor adaptability of main technology, low rate of return on investment and small development scale. The large-scale and efficient development of coalbed methane is faced with great …
Accumulation Model And Exploration And Development Suggestions Of Coal Measure Gas Hydrates In Sanlutian Area Of Muli Coalfield, Qinghai Province,
2022
College of Geoscience & Surveying Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China
Accumulation Model And Exploration And Development Suggestions Of Coal Measure Gas Hydrates In Sanlutian Area Of Muli Coalfield, Qinghai Province, Cao Daiyong, Qin Rongfang, Wang Anmin, Chen Limin, Li Jing, Wei Yingchun
Coal Geology & Exploration
The Natural Gas Hydrate(NGH) is known as the most promising strategic resource in the 21st century because of its huge energy density, convenient use, high combustion value, and cleanness, and it is an alternative energy source with huge potential for conventional oil and gas resources. The occurrence of the NGH in the Sanlutian area of Muli Coalfield in Qinghai Province is the result of the interaction between the abundant gas sources and the hydrate stability zone in cold highland areas. The NGH in coal-bearing strata is defined as the coal measure gas hydrate, belonging to unconventional coal measure gases. To …
Difference Analysis Of Methane Diffusion Properties Between Tectonic Coal And Primary Coal,
2022
School of Geosciences and Surveying Engineering, China University of Mining & Technology(Beijing), Beijing 100083, China; State Key Laboratory of Coal and CBM Co-mining, Jincheng 048012, China
Difference Analysis Of Methane Diffusion Properties Between Tectonic Coal And Primary Coal, Meng Zhaoping, Zhang Kun, Shen Zhen
Coal Geology & Exploration
Primary coal destroyed by geological stresses will form different types of coal structures, and the accumulation and migration of coalbed methane(CBM) are affected by the changes in pore structures, adsorption/desorption, diffusion and permeability. In this paper, the methane isothermal adsorption experiment, and low-temperature liquid nitrogen and carbon dioxide adsorption experiment were carried out on the samples of primary coal and tectonic coal of No.3 coal seam of Zhaozhuang Coal Mine in Qinshui Basin, so as to analyze the adsorption/desorption properties and pore structure characteristics of primary coal and tectonic coal. The methane diffusion difference and control mechanism of primary coal …
Physical Simulation Of In-Situ Microbial Methanation In Coal Reservoirs With The Participation Of Supercritical Co2,
2022
Unconventional Gas Research Institute, Henan Polytechnic University, Jiaozuo 454003, China; School of Energy Resources, China University of Geosciences(Wuhan), Wuhan 430074, China; Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region, Jiaozuo 454003, China
Physical Simulation Of In-Situ Microbial Methanation In Coal Reservoirs With The Participation Of Supercritical Co2, Su Xianbo, Wang Lufei, Zhao Weizhong, Xia Daping, Zhou Yixuan, Wang Qian
Coal Geology & Exploration
Supercritical CO2 can destroy the molecular structure of coal and increase the production of biomethane. To investigate the gas production potential under the in-situ conditions of coal reservoirs with the participation of supercritical CO2, the original reservoir pressure, reservoir temperature, and gas composition of the target coal seam in a coalbed methane block in Xinjiang were used as the in-situ reservoir conditions. The self-designed anaerobic fermentation device for coal reservoirs was used to simulate the in-situ anaerobic fermentation process, and the biogas production, coal surface functional groups and microbial community structure under the in-situ conditions were analyzed. …
Gas Content And Productivity Controlling Factors Of Coal Reservoir In Sijiazhuang Area, Qinshui Basin,
2022
State Key Laboratory of Coal and Coalbed Methane Co-mining, Jincheng 048000, China; Yi’an Lanyan Coal and Coalbed Methane Co-mining Technology Co. Ltd., Taiyuan 030000, China; Jinneng Holding Equipment Manufacturing Group Co., Ltd., Jincheng 048000, China
Gas Content And Productivity Controlling Factors Of Coal Reservoir In Sijiazhuang Area, Qinshui Basin, Li Guofu, Zhang Wei, Li Meng, Pan Jienan, Liu Liangliang, Chen Zhaoying, Zhang Yongcheng, Bai Yang
Coal Geology & Exploration
In order to study the characteristics of coalbed methane accumulation and production controlling factors in the northeastern Qinshui Basin, based on the data of coalbed methane drilling and drainage in the Sijiazhuang area, the geological structure, coal seam thickness and buried depth, maceral of the Sijiazhuang coals are analyzed. The geological control mechanism of gas-bearing coal reservoirs is studied, combined with the fracturing and drainage technology of coal-bed methane wells, the production characteristics of coal-bed methane and its influencing factors are discussed. The results show that: (1) The gas-bearing properties of coal reservoirs in the study area are greatly affected …
Characteristics Of Coal Reservoirs And Favorable Areas Classification And Optimization Of Cbm Planning Blocks In Guizhou Province,
2022
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
Characteristics Of Coal Reservoirs And Favorable Areas Classification And Optimization Of Cbm Planning Blocks In Guizhou Province, Xiang Wenxin, Sang Shuxun, Wu Zhangli, Tu Bin, Guo Zhijun, Han Sijie, Zhou Xiaozhi, Zhou Peiming
Coal Geology & Exploration
The scientific evaluation of favorable CBM blocks concerns the deployment of CBM exploration and development and the maximization of benefits. On the basis of the existing geological and engineering data, the geological background, resource characteristics, occurrence characteristics and reservoir characteristics of CBM are studied in the 18 blocks with unregistered mining rights in Guizhou Province. According to the principle of coal rank classification and evaluation, the optimum block among the 18 blocks is selected by using the multi-level fuzzy comprehensive evaluation method. The results are as follows. (1) The coal seams of Longtan Formation in the 18 planning blocks of …
Multi-Scale Prediction Of Coal Seam Fracture Development In Mg Block, Eastern Margin Of Ordos Basin,
2022
China United Coalbed Methane Corporation Ltd., Beijing 100016, China
Multi-Scale Prediction Of Coal Seam Fracture Development In Mg Block, Eastern Margin Of Ordos Basin, Zhu Guanghui, Li Zhongcheng, Shi Suzhen, Shi Hao, Lin Liming, Liu Yancheng, Zhang Xin
Coal Geology & Exploration
Finding out the development characteristics of coal seam fractures is of great significance for coalbed methane exploitation and safe production of underground coal mines. Logging and seismic are effective means of geophysical identification of coal seam fractures. Electrical imaging, resistivity, density, sonic differential time, natural gamma, neutron porosity and array acoustic logs are used to describe the small scale fracture morphology of No.8 and No.9 coal seams of MG block in the eastern margin of Ordos Basin. The middle-scale fracture of No.8 and No.9 coal seams was predicted by prestack Azimuth AVO inversion in OVT domain. And the large-scale fracture …
Geological Adaptability Analysis And Operational Parameter Optimization For Staged Fracturing Horizontal Wells In Coal Seam Roof,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Geological Adaptability Analysis And Operational Parameter Optimization For Staged Fracturing Horizontal Wells In Coal Seam Roof, Jiang Zaibing, Li Haozhe, Xu Yaobo, Zhang Qun, Li Guihong, Fan Yao, Jiang Wenping, Shu Jiansheng, Pang Tao, Cheng Bin
Coal Geology & Exploration
The technique of staged fracturing horizontal wells in coal seam roof is effective for efficient extraction of coalbed methane (CBM) in broken soft and low-permeability coal seams. With the help of the major national science and technology projects of the 13th Five Year Plan for National Economic and Social Development, the efficient extraction technology of CBM by staged fracturing horizontal wells in coal seam roof was studied. By using theoretical analysis and numerical simulation, the fracture propagation patterns in different in-situ stress states were compared, and the influence of the angle between the horizontal well layout orientation and the minimum …
Production Characteristics Of Deep Coalbed Methane Gas Reservoirs In Daning-Jixian Block And Its Development Technology Countermeasures,
2022
China United Coalbed Methane National Engineering Research Center Co., Ltd., Beijing 100095，China; PetroChina Coalbed Methane Company Limited, Beijing 100028，China
Production Characteristics Of Deep Coalbed Methane Gas Reservoirs In Daning-Jixian Block And Its Development Technology Countermeasures, Nie Zhihong, Shi Xiaosong, Sun Wei, Yan Xia, Huang Hongxing, Liu Ying, Feng Yanqing
Coal Geology & Exploration
The Ordos Basin is rich in deep coalbed methane resources with a depth of more than 2 000 m, which is an important coalbed methane exploration and development area. A number of tests on deep coalbed methane have been carried out in Daning-Jixian Block, and preliminary results have been achieved, but the main technology of scale-efficient development needs to be studied. On the basis of the analysis of experimental data, production data and fracture monitoring data, and by the evaluation of the characteristics, production performance and fracturing effect of deep coalbed methane reservoirs in Daning-Jixian Block, the production characteristics of …
ETH Zürich
Skip Nav Destination Research Article| March 16, 2022 Assessing The Effect Of Melt Extraction From Mushy Reservoirs On Compositions Of Granitoids: From A Global Database To A Single Batholith, J. Cornet, O. Bachmann, J. Ganne, A. Fiedrich, C. Huber, C. D. Deering, X. Feng
Michigan Tech Publications, Part 1
Mafic and ultramafic plutonic rocks are often considered to be crystal cumulates (i.e., they are melt-depleted), but such a classification is much more contentious for intermediate to silicic granitoids (e.g., tonalite, granodiorite, granite, and syenite). Whether or not a given plutonic rock has lost melt to feed shallower subvolcanic intrusive bodies or volcanic edifices has key implications for understanding igneous processes occurring within the crust throughout the evolution of the Earth. We use statistical analyses of a global volcanic and plutonic rock database to show that most mafic to felsic plutonic rock compositions can be interpreted as melt-depleted (i.e., most …
Electro‐Driven Materials And Processes For Lithium Recovery—A Review,
2022
Edith Cowan University
Electro‐Driven Materials And Processes For Lithium Recovery—A Review, Anna Siekierka, Marek Bryjak, Amir Razmjou, Wojciech Kujawski, Aleksandar N. Nikoloski, Ludovic F. Dumée
Research outputs 2022 to 2026
The mass production of lithium‐ion batteries and lithium‐rich e‐products that are required for electric vehicles, energy storage devices, and cloud‐connected electronics is driving an unprecedented demand for lithium resources. Current lithium production technologies, in which extraction and purification are typically achieved by hydrometallurgical routes, possess strong environmental impact but are also energy‐intensive and require extensive operational capabilities. The emergence of selective membrane materials and associated electro‐processes offers an avenue to reduce these energy and cost penalties and create more sustainable lithium production approaches. In this review, lithium recovery technologies are discussed considering the origin of the lithium, which can be …
Comprehensive Correlation Technology Of Coal And Rock Layers In Mines For Intelligent Mining,
2022
Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
Comprehensive Correlation Technology Of Coal And Rock Layers In Mines For Intelligent Mining, Wang Haijun, Liu Shande, Ma Liang, Zhu Yuying, Shu Jiansheng, Wang Xiangye
Coal Geology & Exploration
The coal-rock correlation runs through the whole process of the coal geological exploration and the mine production stage. In view of the difficult problems of the coal-rock correlation in the mine production stage, such as short distance, multi-coal seams and complex structure, taking Huoshaopu Coal Mine in Panxian Coalfield of Guizhou Province as the research object, through the analysis of the geological exploration data, combined with the surface gas investigation boreholes, the underground geological survey, the gas parameter test, the marker layer suitable for the mine production stage was extracted from the coal-rock correlation marker layers established during the geological …
