Yanjun Meng
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View article: Effects of High-Pressure Water Injection on Surface Functional Groups and Wettability in Different Rank Coals: Implications for Hydraulic Fracturing in CBM Wells
Effects of High-Pressure Water Injection on Surface Functional Groups and Wettability in Different Rank Coals: Implications for Hydraulic Fracturing in CBM Wells Open
Hydraulic fracturing is a widely used stimulation technology in coalbed methane (CBM) fields. However, the coal reservoir damage caused by high-pressure hydraulic fracturing seriously affects the production effects, and the mechanism is no…
View article: The Main Controlling Factors of Coalbed Methane Productivity Based on Reservoir Structure—A Case Study of the Jiaozuo Block
The Main Controlling Factors of Coalbed Methane Productivity Based on Reservoir Structure—A Case Study of the Jiaozuo Block Open
In the process of CBM development, the fracturing effect has always been a major controlling factor for CBM productivity. The coal fragmentation degree is a special geological feature in the process of CBM development and research, and oth…
View article: Aquifer Leakage Recharge Controls on CBM Production: A Case Study in the Sanjiao Block, Eastern Ordos Basin, China
Aquifer Leakage Recharge Controls on CBM Production: A Case Study in the Sanjiao Block, Eastern Ordos Basin, China Open
Aquifer leakage recharge poses a prevalent challenge in coalbed methane (CBM) development, severely impeding its efficient production. This study focuses on the Sanjiao Block, located on the eastern margin of the Ordos Basin, and provides …
View article: A Semianalytical Model for Advanced Description of Pressure Drop Funnel during Coalbed Methane Production
A Semianalytical Model for Advanced Description of Pressure Drop Funnel during Coalbed Methane Production Open
Advanced description of pressure drop funnel is crucial in coalbed methane (CBM) production because of dewatering and depressurization methods. Improving the precision of the pressure drop funnel description facilitates obtaining the actua…
View article: Research and Application of Treatment Measures for Low-Yield and Low-Efficiency Coalbed Methane Wells in Qinshui Basin
Research and Application of Treatment Measures for Low-Yield and Low-Efficiency Coalbed Methane Wells in Qinshui Basin Open
China is rich in high-grade coalbed methane resources, accounting for one-third of the total amount of coalbed methane resources. Qinshui Basin is the main high ranking coalbed methane mining basin in China. In the early stage of CBM devel…
View article: Multichannel Sandstone Thin Sections Identification Based on Improved DeepLab V3 Plus Neural Network
Multichannel Sandstone Thin Sections Identification Based on Improved DeepLab V3 Plus Neural Network Open
As an unconventional natural gas resource, tight sandstone gas is primarily stored in the minuscule pores between rocky sand grains. A thorough understanding of the pore structure characteristics of tight sandstone reservoirs is essential …
View article: Research on Fracturing Optimization of Coalbed Methane Wells Aiming at Economic Benefit—A Case Study of Liulin Block
Research on Fracturing Optimization of Coalbed Methane Wells Aiming at Economic Benefit—A Case Study of Liulin Block Open
Hydraulic fracturing is an essential technology in the development of coalbed methane reservoirs. Hydraulic fracturing can create a highly conductive fracture in the reservoir and increase its permeability. At present, the focus of coalbed…
View article: Evaluation of Favorable Area for Coalbed Methane Development Based on Local Variable Weight Theory
Evaluation of Favorable Area for Coalbed Methane Development Based on Local Variable Weight Theory Open
The evaluation of a favorable area is crucial for the exploration and exploitation of coalbed methane (CBM) resources. In traditional evaluation methods, the weight of controlling factors for the evaluation of favorable area is often obtai…
View article: A Method for Evaluating Coalbed Methane Reservoir Productivity Considering Drilling Fluid Damage
A Method for Evaluating Coalbed Methane Reservoir Productivity Considering Drilling Fluid Damage Open
In the process of coalbed methane development, drilling fluid and fracturing fluid cannot achieve absolute compatibility with formation. The incompatibility between the working fluid and reservoir will lead to the intrusion of working flui…
View article: Optimization Method of Production System for Coalbed Methane Wells throughout Life Cycle
Optimization Method of Production System for Coalbed Methane Wells throughout Life Cycle Open
Different from conventional gas reservoirs, the permeability of coalbeds is affected by stress sensitivity and matrix shrinkage during production. These two conditions lead to lower permeability in the reservoir and affect the production e…
View article: Influence of Fracturing on a Coal Structure during Coalbed Methane Stimulation
Influence of Fracturing on a Coal Structure during Coalbed Methane Stimulation Open
The impact of fracturing on coal seams includes not only mechanical alterations but also physical and chemical alterations. The coupling of these alterations plays an important role in the recovery of coalbed methane (CBM). 13C nuclear mag…
View article: The Molecular Model of Organic Matter in Coal-Measure Shale: Structure Construction and Evaluation Based on Experimental Characterization
The Molecular Model of Organic Matter in Coal-Measure Shale: Structure Construction and Evaluation Based on Experimental Characterization Open
To investigate the molecular structure and micropore structure of organic matters in coal-measure shale, the black shale samples of the Shanxi formation were collected from Xishan Coalfield, Taiyuan, and a hybrid experimental–simulation me…
View article: Advances in Unconventional Oil and Gas
Advances in Unconventional Oil and Gas Open
This book focuses on the latest progress in unconventional oil and gas (such as coalbed methane, shale gas, tight gas, heavy oil, hydrate, etc.) exploration and development, including reservoir characterization, gas origin and storage, acc…
View article: Study on the Effect of Salinity and Water Content on CBM Adsorption/Desorption Characteristics of Coal Reservoir in Baode Block
Study on the Effect of Salinity and Water Content on CBM Adsorption/Desorption Characteristics of Coal Reservoir in Baode Block Open
The adsorption/desorption characteristics of a coal reservoir play an important role in coalbed methane (CBM) development. The proximate analysis, maceral analysis and methane isothermal adsorption/desorption experiment are carried out bas…
View article: A Novel Method for the Intelligent Recognition of Lattice Fringes in Coal HRTEM Images Based on Semantic Segmentation and Fuzzy Superpixels
A Novel Method for the Intelligent Recognition of Lattice Fringes in Coal HRTEM Images Based on Semantic Segmentation and Fuzzy Superpixels Open
High-resolution transmission electron microscopy (HRTEM) can directly obtain the lattice fringes and structure parameters of coal. Aiming at present problems in extracting lattice fringes in HRTEM images, such as unlocated fringe regions, …
View article: Coalbed Methane Potential Evaluation and Development Sweet Spot Prediction Based on the Analysis of Development Geological Conditions in Yangjiapo Block, Eastern Ordos Basin, China
Coalbed Methane Potential Evaluation and Development Sweet Spot Prediction Based on the Analysis of Development Geological Conditions in Yangjiapo Block, Eastern Ordos Basin, China Open
The evaluation and prediction of favorable coalbed methane (CBM) sweet spot play an important role in well location deployment and recovery prediction in CBM blocks. This work investigates the CBM geology and accumulation characteristics o…
View article: Brittleness Index of High-Rank Coal Reservoir and Its Influencing Factors in Mabidong Block, Qinshui Basin, China
Brittleness Index of High-Rank Coal Reservoir and Its Influencing Factors in Mabidong Block, Qinshui Basin, China Open
Brittleness index is an important mechanical index to evaluate the fracturability of conventional oil and gas reservoirs. However, the brittleness index of an organic coal reservoir is more complex. In this study, based on array sonic logg…
View article: Application of a Modified Low-Field NMR Method on Methane Adsorption of Medium-Rank Coals
Application of a Modified Low-Field NMR Method on Methane Adsorption of Medium-Rank Coals Open
Methane adsorption capacity is an important parameter for coalbed methane (CBM) exploitation and development. Traditional examination methods are mostly time-consuming and could not detect the dynamic processes of adsorption. In this study…
View article: Research on influencing factors of coal price based on improved principal component analysis and grey correlation method
Research on influencing factors of coal price based on improved principal component analysis and grey correlation method Open
As an important basic energy in China, the price fluctuation of coal is related to the operation of China’s coal market and the whole energy market and coal price analysis has always been the focus of the industry. By establishing an impro…
View article: Study on the process control of AH36 high strength ship plate
Study on the process control of AH36 high strength ship plate Open
There are amounts of surplus in the performance of A 36 high strength ship plate at present. The optimal control of smelting process and method of controlled rolling and controlled cooling parameters was used to in order to higher the effi…
View article: Experimental study on the porosity and permeability of coal in net confining stress and its stress sensitivity
Experimental study on the porosity and permeability of coal in net confining stress and its stress sensitivity Open
The porosity and permeability of coal in net confining stress were analyzed through experiment using the coal samples in the Southern Qinshui Basin. The relationship between porosity and permeability of coal samples and effective stress an…