Prediction Of Fracture Distribution And Evaluation Of Shale Gas Preservation Conditions In Longmaxi Formation In Dongxi Area,
2021
Sinopec Exploration Company, Chengdu 610041, China
Prediction Of Fracture Distribution And Evaluation Of Shale Gas Preservation Conditions In Longmaxi Formation In Dongxi Area, Xie Jiatong, Fu Xiaoping, Qin Qirong, Li Hu
Coal Geology & Exploration
Commercial development of shale gas confirmed that mature shale has great potential for exploration, southeast Sichuan is the strategic pilot area of shale gas exploration and development in southern China, cracks are the key factor of shale gas preservation and development deployment, for the structural environment complex and special basin edge area, increasing the difficulty of shale crack research, but also provides a new direction for shale gas exploration and development. As a new field of oil and gas exploration in China, shale gas exploration has not yet developed a mature crack evaluation system. Taking Dongxi area of the southeast …
Study On The Microscopic Mechanism Of The Loess Improved By Quicklime,
2021
Institute of Land Engineering and Technology, Shaanxi Provincial Land Engineering Construction Group Co., Ltd., Xi'an 710075, China; Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Natural Resources, Xi'an 710075, China; Shaanxi Provincial Land Consolidation Engineering Technology Research Center, Xi'an 710075, China
Study On The Microscopic Mechanism Of The Loess Improved By Quicklime, Xie Xiao, Wang Luyao, Deng Lejuan, Zhang Guowei
Coal Geology & Exploration
To investigate the influence of lime content on loess strength and its microscopic mechanism, different proportions of lime were used to improve loess. Through direct shear test, mercury intrusion porosimetry and scanning electron microscopy, the strength characteristics and microstructure changes of compacted loess and modified loess with different lime contents were analyzed qualitatively and quantitatively, and the microscopic mechanism of lime-improved loess was analyzed in depth. The results show that the shear strength parameters of lime-improved loess increases first and then decreases with the increase of lime contents. The cohesive force and internal friction angle reach the maximum when the …
A 3d Seismic Physical Modeling System Of Large Double Triaxial Air-Supported Positioning And Multichannel Data Acquisition And Its Application,
2021
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
A 3d Seismic Physical Modeling System Of Large Double Triaxial Air-Supported Positioning And Multichannel Data Acquisition And Its Application, Shi Xianxin, Liu Qiang, Hu Jiwu, Wang Pan, Lian Chenguang, Jia Qian, Zhang Miaomiao, Nie Ailan
Coal Geology & Exploration
As an important technology to study seismic wave propagation characteristics, 3D seismic physical simulation is an effective method to understand the propagation law and response characteristics of seismic waves in complex structures. It has the advantages of more realistic results and no limitation on calculation methods and boundary conditions over numerical simulation. Therefore, it has important applications in the research of the basic law of seismic wave propagation, verification of field seismic exploration methods, design optimization of observation systems, etc. This paper presents a 3D seismic physical modeling system of large double triaxial air-supported positioning and multichannel data acquisition, which …
Experimental Study On Transient Electromagnetic Method With A Conical Source,
2021
School of Resources and Geosciences, China University of Mining and Technology, Xuzhou 221116, China
Experimental Study On Transient Electromagnetic Method With A Conical Source, Yang Haiyan, Liu Zhixin, Zhang Hua, Chen Xiao, Lian Zhe, Wang Ling, Yang Fujie
Coal Geology & Exploration
A new transmitter device-conical source has been proved theoretically to have several advantages for transient electromagnetic sounding. To verify application ability of conical source, two kinds of transmitter devices were designed and made, and the experimental studies on surface and in mine roadway were carried out. By applying high density resistivity achievements in surface experiment, the detecting results using conical source and multi-coils were compared. The results show that the description of strata resistivity with conical source is better than that with multi-coils. One fault was identified and the strike and position of which matches the high density resistivity result …
New Method And Optimization Research On Water Sealing Outside Casing Based On Water-Swelling Rubber For Stratified Pumping,
2021
School of Intelligent Manufacturing, Chengdu Technological University, Chengdu 611730, China
New Method And Optimization Research On Water Sealing Outside Casing Based On Water-Swelling Rubber For Stratified Pumping, Zheng Xianghua, Yuan Wei, Luo Yunxiang, Cheng Cong
Coal Geology & Exploration
Stratified pumping test is a key technique for hydrogeological exploration. To solve the problems of low efficiency and poor reliability and controllability of the traditional water-sealing methods outside casing for stratified pumping, a water-swelling rubber was developed based on high water absorption of the sodium polyacrylate resin, and a new approach based on water-swelling rubber was proposed and optimized by the response surface methodology in this paper. With the water swelling ratio of the rubber as response index, a surrogate model was constructed by the Box-Behnken experimental design to study the influence of different process parameters, working condition parameters, and …
Numerical Analysis Of The Effect Of Different Soil Types And Water Content On Heat Transfer Performance Of Horizontal Buried Pipes,
2021
College of Mining, Guizhou University, Guiyang 550025, China
Numerical Analysis Of The Effect Of Different Soil Types And Water Content On Heat Transfer Performance Of Horizontal Buried Pipes, Zou Hang, Pei Peng, Hao Dingyi, Wang Chen
Coal Geology & Exploration
In order to reveal the heat transfer performance of the horizontal buried pipe heat exchanger in the ground source heat pump system in different soil types, this paper, based on the theoretical knowledge of soil capillary water, combined with the means of numerical simulation, discusses the influence of the difference of three-phase composition in different types of energy storage soil on the heat transfer characteristics of the horizontal buried pipe heat exchanger. The results show that under the cooling condition of 308.15 K, the outlet water temperature of the horizontal pipe in the loam soil decreases to 303.3 K and …
Development And Prospect Of Intelligent Drilling Technology And Equipment For Underground Coal Mines In China,
2021
Xi'an Research Institute Co., Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Development And Prospect Of Intelligent Drilling Technology And Equipment For Underground Coal Mines In China, Li Quanxin, Liu Fei, Fang Jun Xi'an Research Institute Co., Ltd., China Coal Technology And Engineering Group Corp., Xi'an 710077, China, Liu Jianlin, Chu Zhiwei
Coal Geology & Exploration
The intelligent drilling technology and equipment are important part of the intelligent construction of coal mine, and it is the advanced technology and equipment urgently needed by coal mine enterprises to further promote the work of reducing personnel and increasing efficiency. The phased achievements of underground intelligent drilling technology and equipment during the 13th five-year plan are systematically summarized, and the development status of key technical equipment such as automatic drilling rig, parameter monitoring of measurement while drilling(MWD) system, rotary steerable system are introduced. The key factors restricting the research and development (R & D) and application of intelligent drilling …
Table Of Contents,
2021
China Coal Technology and Engineering Group (CCTEG)
Geochemical Characteristics Of Marine-Continental Transitional Facies Shale And Shale Gas In Linxing Area,
2021
CNOOC Energy Technology-Drilling & Production Co., Tianjin 300452, China; CNOOC Energy Technology & Services Limited Key Laboratory for Exploration & Development of Unconventional Resources, Tianjin 300452, China
Geochemical Characteristics Of Marine-Continental Transitional Facies Shale And Shale Gas In Linxing Area, Chen Xin, Wu Peng, Gao Jixian, Hu Weiqiang, Ding Wangui, Li Yangbing, Liu Xueqing, Ma Litao, Liu Cheng, Kong Wei, Cao Di, Chen Jianqi, Li Yong
Coal Geology & Exploration
In order to reveal the geochemical characteristics of shale and shale gas on the east edge of Ordos Basin, thin section identification, full rock and clay content, scanning electron microscope, organic carbon, rock pyrolysis, kerogen macerals, and kerogen carbon isotopes were tested, and the gas component and carbon isotopes composition of shale were analyzed. The results show that the mineral component of the transitional facies shale in Linxing area is mainly quartz and clay minerals, containing a small amount of calcite, plagioclase, potassium feldspar, dolomite and pyrite. Affected by the mineral genesis and deposition environment, different mineral components and organic …
Geological Characteristics And Reservoir-Forming Potential Of Shale Gas Of Transitional Facies In Linxing Area, Eastern Margin Of Ordos Basin,
2021
China United Coalbed Methane Company Limited, Beijing 100011, China
Geological Characteristics And Reservoir-Forming Potential Of Shale Gas Of Transitional Facies In Linxing Area, Eastern Margin Of Ordos Basin, Wu Peng, Cao Di, Zhu Guanghui, Liu Xueqing, Li Yong, Li Yangbing, Hu Weiqiang, Liu Zaizhen, Kong Wei, Fei Jingliang
Coal Geology & Exploration
Shale gas of transitional facies is the important replacing area for increase of shale gas reserves and production. On the basis of the experiment and research data of shale of transitional facies of Linxing area in the eastern margin of Ordos Basin, by selecting the strata series of Shanxi Formation, Taiyuan Formation and Benxi Formation as the research object, from the sedimentary environments, shale distribution, organic geochemical characteristics, mineralogy, physical characteristics and gas-bearing characteristics, etc., the geology characteristics of the shale gas transitional facies in the study area were summarized and dissected systematically to analyze its enrichment and reservoir-forming potential. …
Qualitative-Quantitative Multi Scale Characteristics Of Shale Pore Structure From Upper Paleozoic Coal-Measures In Linxing Area,
2021
CNOOC EnerTech-Drilling & Production Co., Tianjin 300452, China; CNOOC Energy Technology & Services Limited Key Laboratory for Exploration & Development of Unconventional Resources, Tianjin 300452, China
Qualitative-Quantitative Multi Scale Characteristics Of Shale Pore Structure From Upper Paleozoic Coal-Measures In Linxing Area, Liu Cheng, Ding Wangui, Zhang Jian, Chen Xin, Wu Peng, Liu Xueqing, Li Yangbing, Ma Litao, Hu Weiqiang, Kong Wei, Li Yong
Coal Geology & Exploration
In order to reveal the micro-pore structure characteristics of marine-continental transitional shale and its main controlling factors in the eastern margin of Ordos Basin, and to enrich the understanding of pore development characteristics and pore structure of marine-continental transitional coal-bearing shale in the block, scanning electron microscope, high-pressure mercury injection and liquid nitrogen adsorption analysis were used to characterize the micro-pore structure characteristics of shale in Linxing area. Furthermore, porosity, total content of organic carbon, mineral content, clay relative content and organic matter maturity were tested to study the main controlling factors of development of shale pore structure. The results …
Characteristics Of Shallow Coal Measure Gas Reservoir And Key Technologies Of Exploration And Development In Yaojie Mining Area,
2021
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Characteristics Of Shallow Coal Measure Gas Reservoir And Key Technologies Of Exploration And Development In Yaojie Mining Area, Du Xinfeng, Yuan Chongliang, Wang Zhengxi, Wang Junde, Li Shibing, Liu Jingdan, He Xiuqing, Zhang Tianguo, Shan Yuanwei, Fang Jiawei
Coal Geology & Exploration
The exploration and development of coal measures gas can not only effectively improve the single well production of coalbed methane in coal mining areas, reduce the waste of resources, but also alleviate the energy crisis in China, reduce coal mine gas accidents, protect the atmospheric environment, and contribute to the realization of carbon peak and carbon neutralization. Based on the shallow coal measure gas development demonstration project in the third mining area of Haishiwan mine field, the characteristics of coal measure gas reservoirs in Yaojie mining area are analyzed, and the key technologies for coal-measure gas exploration and development are …
Cbm Well Drainage Data-Based Dynamic Inversion Study Of Reservoir Gas Content,
2021
College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China; State Key Laboratory of Coal and Coalbed Methane Co-Mining Technology, Jincheng 048012, China
Cbm Well Drainage Data-Based Dynamic Inversion Study Of Reservoir Gas Content, Ma Dongmin, Ji Yusong, Chen Yue, Zheng Chao, Teng Jinxiang, Ma Zhuoyuan, Xiao Jialong
Coal Geology & Exploration
The gas content of coal reservoir is the core parameter of coalbed methane production. There is an error between the measured gas content and the real gas content of coal reservoir. In this paper, based on the gas production of Haishiwan coalbed methane wells in different periods and the decrease of the "constant volume" of the gas content of coal reservoirs, the real-time gas content of coal reservoirs is inverted, and the change rule of the real-time gas content in the process of coalbed methane well drainage is explored. The results show that: (1) The gas content of coal reservoir …
Physical Modeling Of Seismic Response For The Coal Seams Of Yan'an Formation In Loess Tableland Of North China,
2021
SINOPEC Key Laboratory of Geophysics, Nanjing 211103, China; SINOPEC Geophysical Research Institute, Nanjing 211103, China
Physical Modeling Of Seismic Response For The Coal Seams Of Yan'an Formation In Loess Tableland Of North China, Xing Tingdong, Xue Shigui, Li Xiaowei, Suo Chonghui, Wang Huiming, Jiao Yanyan
Coal Geology & Exploration
A seismic physical simulation is carried out for the complex seismic response of the coal seam of Yan'an Formation in the loess tableland. First, the physical model materials for the dry layer near the surface of the loess tableland and the coal seam are developed. After several tests, a mixture of silicone rubber with silicon aerogel powder is selected to simulate the surface of the loess tableland, and the mixture with ultra-fine carbon powder added to silicone rubber is used to simulate the low-speed and low-density coal seam. Through the methods of molds control layer, layer by layer pouring, three-dimensional …
3d Seismic Physical Modeling Acquisition Technology And Its Application,
2021
Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
3d Seismic Physical Modeling Acquisition Technology And Its Application, Liu Qiang, Shi Xianxin, Hu Jiwu, Dong Ruijing, Lian Chenguang
Coal Geology & Exploration
Seismic physical modeling acts as a bridge between the research on seismic theoretical methods and actual seismic exploration, which is an important means of studying the propagation law of the elastic wave field and verifying the processing and interpretation methods. It plays an important role of theoretical supporting in the field of oil & gas seismic exploration. There is a great difference between coalfield and oil & gas in seismic exploration attributes, and no professional automatic seismic physical modeling system has been built in the field of coal field seismic exploration. Therefore, a large professional 3D seismic physical modeling system …
Design And Construction Of A Seismic Physical Model Of Room-Pillar Goafs In Shallow Coal Seams,
2021
College of Geology and Environment, Xi'an University of Science and Technology, Xi'an 710054, China; Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China
Design And Construction Of A Seismic Physical Model Of Room-Pillar Goafs In Shallow Coal Seams, Wang Pan, Zhu Shujie, Jia Qian, Jian Benqi, Lian Miaomiao, Dong Ruijing
Coal Geology & Exploration
In view of the problem of low detection accuracy of room-pillar goafs in shallow coal seams in northern Shaanxi, the seismic physical model is designed for physical simulation according to the principle of similarity ratio of geometry size and wave impedance. Through a large number of ratio tests of similar materials, the ratio of epoxy resin and silicone rubber is determined as 1 : 1.2 for similar materials of low velocity loess layer, 1 : 0.2 : 0.6 for epoxy resin, silicone rubber and talc for mudstone, 1 : 0.4 for epoxy resin and silicone rubber for coal seams, 1 …
Discussion On The Recommended Models For Resource Reuse Of Closed Coal Mines In Main Mining Areas Of Hebei Province,
2021
Coal Geology Geological Team of Hebei Province Bureau, Xingtai 054000, China
Discussion On The Recommended Models For Resource Reuse Of Closed Coal Mines In Main Mining Areas Of Hebei Province, Yin Quanzeng, Chen Zhongshan, Feng Qiyan, Geng Lijuan, Lian Lixun, Li Fang, Liu Ning
Coal Geology & Exploration
The evaluation and the utilization of the resources of the closed coal mines have dual benefits of resources and environment, and can provide a transformation and development path for coal mining enterprises. Based on the investigation of the resources of the closed coal mines in the main mining areas of Hebei Province, through the summary of the typical cases of the resources reuse of the closed coal mines at home and abroad and in Hebei Province, this paper sums up 7 types and 19 kinds of recommended modes of the resources reuse of the closed coal mines in Hebei Province, …
Plastic Deformation-Based Constitutive Relation Of Coal Damage And Permeability Model,
2021
College of Mining, Guizhou University, Guiyang 550025, China
Plastic Deformation-Based Constitutive Relation Of Coal Damage And Permeability Model, Wu Xuehai, Li Bobo, Wang Xin, Gao Zheng, Li Jianhua, Xu Jiang
Coal Geology & Exploration
Coal and gas outburst induced by mining disturbance is one of the main gas dynamic disasters in coal mine production. In order to systematically explore the evolution characteristics of coal damage and the law of gas seepage under mining disturbance, the whole stress strain–seepage experiment under different gas pressures was carried out. The generalized Hooke's law was modified by considering the effects of gas adsorption and thermal expansion, the plastic deformation-based constitutive relation of coal damage was established, and the piecewise permeability model considering the damage was further constructed. The results shown that the coal permeability can be divided into …
Prevention And Control Technology Of Goaf Water Hazard In Unauthorized Mining Areas Of Extremely Soft And Medium-Thick Coal Seams,
2021
China Coal Research Institute, Beijing 100013, China; Xi'an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi'an 710077, China; Shaanxi Key Laboratory of Prevention and Control Technology for Coal Mine Water Hazard, Xi'an 710077, China
Prevention And Control Technology Of Goaf Water Hazard In Unauthorized Mining Areas Of Extremely Soft And Medium-Thick Coal Seams, Li Zhi, Zheng Shitian, Shi Zhiyuan, Wang Yuhang
Coal Geology & Exploration
Unauthorized mining in coal pit is common in China's coal industry. As the scope of unauthorized mining and the amount of accumulated water are hard to determine, the goaf water seriously threatens the safety of mining in adjacent large coal mines. In order to explore the unauthorized boundary of coalpits quickly and accurately and prevent the threat of goaf water, the long distance drilling technology of ground bedding borehole in medium and thick coal seam is proposed based on the controllable trajectory and accurate positioning of ground directional drilling, which mainly includes precise drilling in extremely soft and medium-thick coal …
Prediction Model Of Water Inrush From Coal Floor Based On Ga-Bp Neural Network Optimized By Ssa And Its Application,
2021
College of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, China
Prediction Model Of Water Inrush From Coal Floor Based On Ga-Bp Neural Network Optimized By Ssa And Its Application, Yin Huiyong, Zhou Xinlong, Lang Ning, Zhang Lifeng, Wang Mingli, Wu Tao, Li Xin
Coal Geology & Exploration
With the increase of coal mining depth, coal production process is faced with complex water inrush mechanism and variable water inrush main control factors, and the uncertainties among the factors make the prediction of floor water inrush more difficult. In order to accurately predict the risk of floor water inrush, aiming at the small sample and non-linear problem of floor water inrush, firstly, genetic Algorithm is used to optimize the initial weights and thresholds of network random assignment, and then Sparrow Search Algorithm with strong search ability and good stability is selected to optimize the weights and thresholds for the …
