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Articles 3211 - 3240 of 5623
Full-Text Articles in Oil, Gas, and Energy
Study On Pore Structure And Pressure-Sensitive Effect Of Tectonic Coal In Huaibei Xutuan Mine, Dong Kui, Jia Jiancheng, Gong Zewen, Wu Yan
Study On Pore Structure And Pressure-Sensitive Effect Of Tectonic Coal In Huaibei Xutuan Mine, Dong Kui, Jia Jiancheng, Gong Zewen, Wu Yan
Coal Geology & Exploration
In order to discuss pore structure and pressure-sensitive effect of tectonic coal, coal samples of Huaibei Xutuan mine were measured by optical microscope, scanning electron microscope, mercury injection, and triaxial servo-controlled seepage equipment for thermo-fluid-solid coupling to reveal the pore structure and the influence of effective stress on permeability or permeability coefficient of structural coal. The results show that cataclastic structure of tectonic coal is regular, flat and has good connectivity; the pores of primary coal are mainly composed of micropores, micropores and transitional pores are dominant in tectonic coal has. The effective stress of ductile deformed coal has a …
Preparation Of Polished Slice Of Special Coal And Its Influence On Coal Petrology Analysis, Liu Shande
Preparation Of Polished Slice Of Special Coal And Its Influence On Coal Petrology Analysis, Liu Shande
Coal Geology & Exploration
Coal petrology analysis is widely used in coal facies research, geological exploration and coal blending test. Qualified polished coal slice is the premise of coal petrology analysis. In order to solve the preparation problem of special coal optical plates, such as brittle samples and aging coal optical plates, a complete preparation process was raised, and the feasibility of the process was verified. The results showed that Rmax was very little affected by secondary preparation, but the maceral group composition content was significantly affected, and the fluctuation of the anthracite' microcomponent was the greatest. When the maceral group composition quantification …
Reservoir-Forming Conditions Of Shale Gas In Badaowan Formation In Fukang Area, Xinjiang, Zhang Min, Li Xianqing, Zhang Jizhen, Sun Jie, Liang Wanle, Duan Zhiyou, Li Hanqing
Reservoir-Forming Conditions Of Shale Gas In Badaowan Formation In Fukang Area, Xinjiang, Zhang Min, Li Xianqing, Zhang Jizhen, Sun Jie, Liang Wanle, Duan Zhiyou, Li Hanqing
Coal Geology & Exploration
In order to evaluate the potential of shale gas of coal measures in Fukang area, Xinjiang, taking the shale of Jurassic coal measures in Badaowan Formation as an example, the study was carried out and the favorable accumulation area for shale gas was preliminarily put forward according to the drilling, core data and sample analysis results in this paper. The result shows that the accumulative thickness of Jurassic Badaowan Formation shale is big(200-400 m), the buried depth is shallow(<1 500 m), the organic carbon content is high(average TOC>2.0%), mainly of type Ⅲ and Ⅱ2, thermal evolution level is moderate(Rran is 0.8%-1.1%, mature), physical property of reservoir …
Modification Of Na-K-Mg Triangular Diagram And Selection Of Na-K Geothermometer, Wang Xin, Qi Jihong, Xu Mo, Ma Xiaoyun
Modification Of Na-K-Mg Triangular Diagram And Selection Of Na-K Geothermometer, Wang Xin, Qi Jihong, Xu Mo, Ma Xiaoyun
Coal Geology & Exploration
Na-K-Mg triangular diagram is a preliminary method of determining the water-rock equilibrium state. It does not specifically consider the effect of geothermometer equations and mineral compositions on the equilibrium state. Therefore, using the Na-K-Mg triangular diagram modified by different Na-K geothermometer equations to judge water-rock equilibrium state, and using the suitable Na-K geothermometer equation to calculate the temperature of geothermal reservoirs, is of great significance to divide the genetic types of geothermal systems and develop or utilize geothermal resources. It is found that any point in the modified Na-K-Mg triangular diagram is fully equilibrated with the curve determined by one …
Characteristics Of Height Of Water Flowing Fractured Zone Caused During Ful-Ly-Mechanized Caving Mining In Huanglong Coalfield, Li Chaofeng
Coal Geology & Exploration
In order to study the law of height of water flowing fractured zone caused by fully-mechanized caving mining in Huanglong coalfield, this paper has systematically collected the measured data in the region, and methods of mathematical statistics and regression analysis were used to study the relationship among the height of water flowing fractured zone, width of working face, depth of coal seam and height of coal mining. The results show that:When the width of working face was less than 240 m and the height of coal mining was 8.5 to 9.5 m, the height of water flowing fractured zone under …
Coal Mine Water Inrush Prediction Based On Lstm Neural Network, Dong Lili, Fei Cheng, Zhang Xiang, Cao Chaofan
Coal Mine Water Inrush Prediction Based On Lstm Neural Network, Dong Lili, Fei Cheng, Zhang Xiang, Cao Chaofan
Coal Geology & Exploration
According to the prediction of water inrush from coal seam floor, based on the summarization of existing water inrush prediction methods and theories, the feature selection experiment shows that water pressure, distance from the working surface, sandstone section thickness, coal thickness, coal seam inclination, fault throw, fissure zone, mining area, mining height and strike length are the main factors affecting the occurrence of water inrush. These factors are complex and non-linear. A water inrush prediction model based on long short-term memory(LSTM) neural network was proposed. The data of the coal mine water inrush case was used as sample data to …
Influence Of Composite Roof Structure On The Stability Of Coal Roadway, Chen Xinnian, Wang Jingchun, Xiong Xianyu, Fan Jiawei, Shen Pan
Influence Of Composite Roof Structure On The Stability Of Coal Roadway, Chen Xinnian, Wang Jingchun, Xiong Xianyu, Fan Jiawei, Shen Pan
Coal Geology & Exploration
The composite roof structure of coal roadway is rather complex. Its stability is related to lithology, thickness of strata, number of strata, location of strata and cohesive force between layers. Based on mechanics theory of simplified composite roof composite beams, a simplified mechanical test model of composite beams was established, and the effects of the structural characteristics of composite roof on the stability of composite beams were analyzed by experiments. The purpose is to provide a scientific basis for the classification and control of composite roof stability. The results show that the stability of the roof increases with the increase …
Numerical Analysis Of Temperature Field Of Underwater Dredging Artificial Frozen Plate, Wu Yuwei, Hu Jun, Wang Zhixin, Zeng Dongling, Wang Shucheng
Numerical Analysis Of Temperature Field Of Underwater Dredging Artificial Frozen Plate, Wu Yuwei, Hu Jun, Wang Zhixin, Zeng Dongling, Wang Shucheng
Coal Geology & Exploration
In order to understand the development of the temperature field of artificial freeze dredging plates and the process of the formation of frozen curtains, the finite element analysis was used to perform numerical analysis using the single factor analysis method for research of the frozen process in different circumstances of geometric size of plate and physical environment of the soil under water. The results show that the correlation between the different geometric dimensions of the frozen plate and the dredging depth is weak, and the geometric dimension of the frozen plate can only change the area of dredging; for the …
Method For Determination Of Measurent Time Of Resistivity Logging In Artificial Well Liquid, Wang Haijun, Ma Liang
Method For Determination Of Measurent Time Of Resistivity Logging In Artificial Well Liquid, Wang Haijun, Ma Liang
Coal Geology & Exploration
In order to solve the problem of determining the most critical parameter of the logging time of artificial well fluid resistivity logging, and get rid of the method that depends on the construction experience for a long time, guide logging technicians to obtain reliable logging curves, from the factors influencing the measurement time, the mass conservation law was used to build the calculation model for the best measurement time of logging, the computational formula for the best measurement time was derived, which was verified through in-site contrast experiment of boreholes. The results show that the computational formula set up by …
Properties Of Mud Cake Associated With Silica Shale Powder Intrusion Into Drilling Fluid, Mo Dingqiang, Sun Pinghe, Zhao Binkui, Wang Jingyuan, Zhang Shaohe, Cao Han
Properties Of Mud Cake Associated With Silica Shale Powder Intrusion Into Drilling Fluid, Mo Dingqiang, Sun Pinghe, Zhao Binkui, Wang Jingyuan, Zhang Shaohe, Cao Han
Coal Geology & Exploration
Drilling fluid is very important for maintaining the stability of the hole wall in shale drilling. The mud cake formed by the fluid loss also plays a decisive role in protecting the reservoir. In order to study the influence of shale rock powder intrusion into low-solid-phase drilling fluids on the basic properties of mud cakes, the paper selects the siliceous shale powders in northwestern Hunan as the research object, and designs orthogonal experiments. In addition, the test results are analyzed using variance and range, which show that the content of rock powder is the main factor affecting the thickness of …
Effect Of Pt Promotion On The Ni-Catalyzed Deoxygenation Of Tristearin To Fuel-Like Hydrocarbons, Ryan Loe, Kelsey Huff, Morgan Walli, Tonya Morgan, Dali Qian, Robert Pace, Yang Song, Mark Isaacs, Eduardo Santillan-Jimenez, Mark Crocker
Effect Of Pt Promotion On The Ni-Catalyzed Deoxygenation Of Tristearin To Fuel-Like Hydrocarbons, Ryan Loe, Kelsey Huff, Morgan Walli, Tonya Morgan, Dali Qian, Robert Pace, Yang Song, Mark Isaacs, Eduardo Santillan-Jimenez, Mark Crocker
Center for Applied Energy Research Faculty and Staff Publications
Pt represents an effective promoter of supported Ni catalysts in the transformation of tristearin to green diesel via decarbonylation/decarboxylation (deCOx), conversion increasing from 2% over 20% Ni/Al2O3 to 100% over 20% Ni-0.5% Pt/Al2O3 at 260 °C. Catalyst characterization reveals that the superior activity of Ni-Pt relative to Ni-only catalysts is not a result of Ni particle size effects or surface area differences, but rather stems from several other phenomena, including the improved reducibility of NiO when Pt is present. Indeed, the addition of a small amount of Pt to the supported Ni …
Surface And Interface Properties In Thin-Film Solar Cells: Using Soft X-Rays And Electrons To Unravel The Electronic And Chemical Structure, Lothar Weinhardt, Dirk Hauschild, Clemens Heske
Surface And Interface Properties In Thin-Film Solar Cells: Using Soft X-Rays And Electrons To Unravel The Electronic And Chemical Structure, Lothar Weinhardt, Dirk Hauschild, Clemens Heske
Chemistry and Biochemistry Faculty Research
Thin‐film solar cells have great potential to overtake the currently dominant silicon‐based solar cell technologies in a strongly growing market. Such thin‐film devices consist of a multilayer structure, for which charge‐carrier transport across interfaces plays a crucial role in minimizing the associated recombination losses and achieving high solar conversion efficiencies. Further development can strongly profit from a high‐level characterization that gives a local, electronic, and chemical picture of the interface properties, which allows for an insight‐driven optimization. Herein, the authors' recent progress of applying a “toolbox” of high‐level laboratory‐ and synchrotron‐based electron and soft X‐ray spectroscopies to characterize the chemical …
Ecological Response Of Phytoplankton To The Oil Spills In The Oceans, Danling Tang, Jing Sun, Li Zhou, Sufen Wang, Ramesh P. Singh, Gang Pan
Ecological Response Of Phytoplankton To The Oil Spills In The Oceans, Danling Tang, Jing Sun, Li Zhou, Sufen Wang, Ramesh P. Singh, Gang Pan
Mathematics, Physics, and Computer Science Faculty Articles and Research
Oil spills in oceans have substantial influence on marine ecosystems. This study investigates 21 oil spills in the world. Analyzing Chlorophyll-a (Chl-a) from Moderate Resolution Imaging Spectroradiomerer (MODIS) data after Penglai oil spills on 4 June 2011, found a bloom with peak value of Chl-a (13.66 mg m−3) spread over an area of 800 km2 during 18–25 June 2011, and a pronounced increase in the monthly Chl-a concentration (6.40 mg m−3) on June 2012 in the Bohai Sea. Out of the 21 oil spills, 14 blooms were observed, while 11 …
North Dakota's Energy Future!, University Of North Dakota. Energy And Environmental Research Center
North Dakota's Energy Future!, University Of North Dakota. Energy And Environmental Research Center
EERC Brochures and Fact Sheets
The Energy & Environmental Research Center’s (EERC’s) goals with North Dakota’s natural resources and energy production for the future. Includes information on resource sustainability, improving pipeline leaks, creating safe carbon capture methods and the EERC’s involvement with outreach and education with the University of North Dakota. [This item is an outdated or superseded version and retained for historical purposes only. It may no longer reflect current information, policies, or practices.]
Continuous Catalytic Deoxygenation Of Waste Free Fatty Acid-Based Feeds To Fuel-Like Hydrocarbons Over A Supported Ni-Cu Catalyst, Ryan Loe, Yasmeen Lavoignat, Miranda Maier, Mohanad Abdallah, Tonya Morgan, Dali Qian, Robert Pace, Eduardo Santillan-Jimenez, Mark Crocker
Continuous Catalytic Deoxygenation Of Waste Free Fatty Acid-Based Feeds To Fuel-Like Hydrocarbons Over A Supported Ni-Cu Catalyst, Ryan Loe, Yasmeen Lavoignat, Miranda Maier, Mohanad Abdallah, Tonya Morgan, Dali Qian, Robert Pace, Eduardo Santillan-Jimenez, Mark Crocker
Center for Applied Energy Research Faculty and Staff Publications
While commercial hydrodeoxygenation (HDO) processes convert fats, oils, and grease (FOG) to fuel-like hydrocarbons, alternative processes based on decarboxylation/decarbonylation (deCOx) continue to attract interest. In this contribution, the activity of 20% Ni-5% Cu/Al2O3 in the deCOx of waste free fatty acid (FFA)-based feeds—including brown grease (BG) and an FFA feed obtained by steam stripping a biodiesel feedstock—was investigated, along with the structure-activity relationships responsible for Ni promotion by Cu and the structural evolution of catalysts during use and regeneration. In eight-hour experiments, near quantitative conversion of the aforementioned feeds to diesel-like hydrocarbons was achieved. …
Understanding Greenhouse Gases, Julie M. Mueller, Laura Edwards, Madhav P. Nepal, Larry B. Browning, Matthew L. Miller, P. Troy White
Understanding Greenhouse Gases, Julie M. Mueller, Laura Edwards, Madhav P. Nepal, Larry B. Browning, Matthew L. Miller, P. Troy White
iLEARN Teaching Resources
Students will conduct hands-on experiments to see how greenhouse gases interact with the Earth’s atmosphere and how greenhouse gases affect temperature. This lesson introduces National Geographic’s Geo-Inquiry Process, where students will identify a Geo-inquiry question, collect data, and create a project around the answer to their question. Students will then present their findings to their peers and evaluate their Geo-Inquiry process.
Adsorbability Of Shale In Coal Measures And Its Influencing Factors, Zhang Baoxin, Fu Xuehai, Zhang Qinghui, Zhou Baoyan, Liu Zheng
Adsorbability Of Shale In Coal Measures And Its Influencing Factors, Zhang Baoxin, Fu Xuehai, Zhang Qinghui, Zhou Baoyan, Liu Zheng
Coal Geology & Exploration
In order to reveal the adsorption and gas-bearing characteristics of shale in coal measures, this study was based on the gas content, isotherm adsorption, high-pressure mercury injection, and liquid nitrogen adsorption of more than 200 coal shale in six major coal fields in Shanxi Province and Junggar basin. XRD diffraction and other measured data, the adsorption and gas characteristics of shale were analyzed, and the influencing factors were discussed. The results show that the measured gas content of shale is between 0-5.87 cm3/g, concentrated at 0.90-2.00 cm3/g; VL is between 0.11-6.3 cm3/g with …
Distribution Characteristics Of Associated Elements In Middle Jurassic Coal In The North Of Datong Coalfield And Their Geological Significance, Qu Xiaorong
Coal Geology & Exploration
In order to study the geochemical characteristics and geological significance of associated elements in Middle Jurassic coal of Datong coalfield, the distribution and occurrence of the associated elements in 9 coal seams in the northern Datong coalfield were analyzed by inductively coupled plasma mass spectrometry(ICP-MS), X-ray diffraction(XRD), optical electron microscopy and scanning electron microscopy(SEM). The results show that the Jurassic coal in Datong coalfield has low trace element content, and beneficial elements(Li, Ga) are far lower than the boundary grade, which has no development potential. But the harmful elements such as Co and Zn in No.2 coal, Tl in No.9, …
Storage Rule And Controlling Factors Of Coalbed Gas In Zhaoguan Mine Field Of Huanghebei Coalfiled, Song Xiaozhong
Storage Rule And Controlling Factors Of Coalbed Gas In Zhaoguan Mine Field Of Huanghebei Coalfiled, Song Xiaozhong
Coal Geology & Exploration
Storage rule and controlling factors of coalbed gas in Zhaoguan mine field were analyzed on the basis of the generation, storage and migration theory of coalbed gas in combination with the data of geological exploration and mine production. From research on the regional geological evolution, coal generating and storing capacity and lithologic characteristics, geological structure, burial depth, bedrock thickness, hydrogeological conditions and magmatic intrusion, it was found that underground hydrodynamic conditions and magmatic intrusion events are the controlling factors of coalbed gas storage in the mine. Underground hydrodynamic conditions had obvious effect, shallow hydrodynamic conditions were manifested mainly as migration …
Slope Stability Evaluation Based On Set Pair Cloud Model, Yao Jianye, Zhang Shan, Hao Guoqiang
Slope Stability Evaluation Based On Set Pair Cloud Model, Yao Jianye, Zhang Shan, Hao Guoqiang
Coal Geology & Exploration
When the set pair analysis is applied to evaluate slope stability, the connection degree is usually decided by linear function, which can't reflect the actual conditions of the engineering project objectively and comprehensively and neglect the system randomness. The set pair analysis theory is improved by application of cloud theory which is superior in dealing with the connection degree and set pair analysis-cloud model of slope stability evaluation is established. In this model, the weight matrix is obtained by using the cloud theory to improve the AHP, and the evaluation matrix is obtained by combining with the connection degree evaluation …
Microseismic Positioning Method Based On Differential Evolution Algorithm, Wang Yunhong, Wang Baoli, Duan Jianhua
Microseismic Positioning Method Based On Differential Evolution Algorithm, Wang Yunhong, Wang Baoli, Duan Jianhua
Coal Geology & Exploration
Aiming at the problem that the location accuracy of conventional time-based microseismic location method depends on the accuracy of travel time, a differential evolution microseismic location method is proposed to improve the locating target function. Based on the traditional micro-seismic P-wave travel-time location method, the error weighting coefficient was added to the localization objective function, which reduced the impact of the first-time picking accuracy on the microseismic location by reducing the effect of the microseismic signal path with low initial pick-up accuracy on the locating error. The differential evolution algorithm, through population initialization, mutation, crossover, and selection operations, solves the …
Development And Application Of Geocoal For In-Seam Seismic Data Processing, Wang Baoli, Jin Dan
Development And Application Of Geocoal For In-Seam Seismic Data Processing, Wang Baoli, Jin Dan
Coal Geology & Exploration
A data processing platform for in-seam seismic exploration(ISS) was developed, which can make ISS better serve safe production in coal mines. The software design architecture was constructed, and the function modules and the software running environment are introduced. Finally, some software interfaces and results were demonstrated.
Analysis Of Influencing Parameters Of Temperature Field In A New Pipe-Roofing Freezing Method, Wu Yuwei, Li Chunfang, Hu Jun, Wang Zhixin, Wang Shucheng
Analysis Of Influencing Parameters Of Temperature Field In A New Pipe-Roofing Freezing Method, Wu Yuwei, Li Chunfang, Hu Jun, Wang Zhixin, Wang Shucheng
Coal Geology & Exploration
The development status of the temperature field around the freezing pipe in the method of pipe roofing freezing is the technical focus of this construction method. In order to study the development of the temperature field in this method, two paths are selected in the model, and analysis points are placed on the path. By analyzing the effects of soil thermal conductivity, volumetric heat capacity, latent heat of phase change, and original ground temperature on the development law of the temperature field, the following conclusion was drawn:Compared with the method of freezing the pipe curtain of the Gongbei tunnel in …
Table Of Contents, The Editors
Present Situation And Prospect Of Drilling Equipment Technology In Coal Mine, Yao Ke, Tian Hongliang, Yao Ningping, Yin Xinsheng, Fang Peng, Yao Yafeng, Wu Di, Wang Longpeng
Present Situation And Prospect Of Drilling Equipment Technology In Coal Mine, Yao Ke, Tian Hongliang, Yao Ningping, Yin Xinsheng, Fang Peng, Yao Yafeng, Wu Di, Wang Longpeng
Coal Geology & Exploration
After over 40 years of development, the technology of underground drilling equipment, vital to guarantee safety and efficient production for coal mines, has been improved greatly. Combining with the characteristics of products, types of technology and application domains, the development of domestic and foreign of underground drilling equipment for coal mines are introduced, the application effects and existing problems of drilling machines are analyzed, especially the development experience and current situation of domestic drilling machines are summarized, detailing on technology status of the five most representative models, such as the split type drill, caterpillar drill, electro-hydraulic control drill, rubber wheel …
Coupling Relationship Between Oil And Gas Of Mesozoic Coal-Bearing Measures And Uranium Metallogenesis In Huangling Area, Si Qinghong, Cao Huifeng, Li Jianguo, Sima Xianzhang, Yu Reng‘An, Liu Houning, Liu Xiaoxue, Zhang Chao
Coupling Relationship Between Oil And Gas Of Mesozoic Coal-Bearing Measures And Uranium Metallogenesis In Huangling Area, Si Qinghong, Cao Huifeng, Li Jianguo, Sima Xianzhang, Yu Reng‘An, Liu Houning, Liu Xiaoxue, Zhang Chao
Coal Geology & Exploration
In order to clarify the coupling relationship between oil and gas of Mesozoic coal-bearing measures(reservoir) and uranium deposits(points) in Huangling area, field geology investigations of boreholes and sections, analysis and processing of borehole data and experimental data, and integration of reservoir and uranium(point) information were carried out. Collation and systematic study of tectonic-sedimentary systems of Mesozoic coal-bearing mesure, uranium geological characteristics, oil and gas geology characteristics, spatial distribution relationship between hydrocarbon reservoirs and uranium deposits, genetic relationship between hydrocarbon-bearing fluids and uranium-associated altered minerals, and the time relationship between hydrocarbons and uranium mineralization were discussed. The study shows that the …
Design And Implementation Of Information Management Platform For Big Data Of Uranium, Zhou Xiaoxi, Deng Fan, Wan Lin, Yang Jun
Design And Implementation Of Information Management Platform For Big Data Of Uranium, Zhou Xiaoxi, Deng Fan, Wan Lin, Yang Jun
Coal Geology & Exploration
In order to integrate the borehole data and geological survey data of sandstone-type uranium deposits, the unified management of the borehole database was implemented, and the efficiency of integrated application of the geological data of borehole data was improved. A comprehensive information management platform for uranium was designed and implemented. For big data platform, the four-layer framework composed of the base installation, information resources, application service, user interaction was proposed. Techniques such as virtualization of cloud computing, distributive storage and parallel computing were adopted to set up the basic environment of the big data of uranium and improve the unified …
Uranium Metallogenic Characteristics And Prospecting Significance Of Hongqingliang Area In Northeastern Ordos Basin, Wu Zhaojian, Yan Maohua, Han Xiaozhong, Yu Reng’An, Sima Xianzhang, Jiang Zhe, Yin Dongfa, Hu Hang, Deng Yutao
Uranium Metallogenic Characteristics And Prospecting Significance Of Hongqingliang Area In Northeastern Ordos Basin, Wu Zhaojian, Yan Maohua, Han Xiaozhong, Yu Reng’An, Sima Xianzhang, Jiang Zhe, Yin Dongfa, Hu Hang, Deng Yutao
Coal Geology & Exploration
A NNW trending uranium metallogenic belt was found in the northeastern Ordos basin in last 20 years. In order to evaluate further the mineralizing potential of the middle part of this uranium minerogenetic belt, we choose a typical less developed area:Hongqingliang area as a research object to analyze its ore-forming conditions on the basis of the secondary development of coalfield data. These ore-forming conditions are composed of characteristics of stratigraphic structure, sand thickness distribution, spatial morphology of roof and floor, the sedimentary-tectonic evolution of Zhiluo Formation and so on. After comprehensive analysis of uranium mineralization law and ore controlling factors, …
Lithology Characteristics And Meaning Of The Target Layer Of Sandstone-Type Uranium Deposits In Kamusite Area Of The Eastern Junggar Basin, Yin Dongfa, Han Xiaozhong, Huang Pengtao, Sima Xianzhang, Yu Reng’An, Zhou Yu, Wu Zhaojian, Hu Hang, Chen Lulu
Lithology Characteristics And Meaning Of The Target Layer Of Sandstone-Type Uranium Deposits In Kamusite Area Of The Eastern Junggar Basin, Yin Dongfa, Han Xiaozhong, Huang Pengtao, Sima Xianzhang, Yu Reng’An, Zhou Yu, Wu Zhaojian, Hu Hang, Chen Lulu
Coal Geology & Exploration
Junggar basin is an important energy exploration base in China. The exploration of its uranium resources has been difficult to break through. By secondary development of the coal exploration results of Kamusite area in eastern Junggar basin, further drilling verification, industrial uranium orebodies have been found. The Middle Jurassic Toutunhe Formation is the ore-bearing target in this area, has very good prospecting prospect and research significance. In order to understand the petrological characteristics and uranium mineralization of the target-layer sand body in this area, through the detailed field geological survey, borehole observation and other methods, with the advanced analysis and …
Method And Application Of Diagnosis Of Low Productivity Damage Of Cbm Wells, Feng Qing
Method And Application Of Diagnosis Of Low Productivity Damage Of Cbm Wells, Feng Qing
Coal Geology & Exploration
Coal reservoirs differ from conventional reservoirs, are easily damaged and the damage factors are complex. Massive papers focus on CBM damage mechanism, but fewer studies on pollution types and stimulating measures. This paper studied various factors influencing CBM and water production in a block of Qinshui basin from angle of geology, engineering and drainage, and established the typical production curve model to determine reservoir judgement method of damage types of low production wells, layer and well selection standards for reservoir with big yield-increasing potential to carry out second reconstruction. The results proved that factors influencing CBM wells productivity such as …