A5072876734- Coal Properties and Utilization
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- NMR spectroscopy and applications
- Rock Mechanics and Modeling
- Hydraulic Fracturing and Reservoir Analysis
- Atmospheric and Environmental Gas Dynamics
- Geoscience and Mining Technology
- Coal and Its By-products
- Geophysical Methods and Applications
- Enhanced Oil Recovery Techniques
- Geomechanics and Mining Engineering
- Technology Assessment and Management
China University of Geosciences (Beijing)
2012-2025
China Geological Survey
2023
Using diverse geologic and geophysical data from recent exploration development, experimental results of analysis gas content, capacity, composition, this article discusses how geologic, structural, hydrological factors determine the heterogeneous distribution in Weibei coalbed methane (CBM) field. The coal rank Pennsylvanian no. 5 seam is mainly low-volatile bituminous semianthracite. total content 2.69 to 16.15 m3/t (95.00–570.33 scf/t), saturation 26.0% 93.2%. Burial coalification...
Summary Hydraulic fracturing technology has been widely used to improve the productivity of coalbed methane (CBM) reservoir, during which tons fluids infiltrate coal seam. However, effects imbibition on CBM recovery are still unclear. In this study, spontaneous and forced water experiments in methane-bearing low-volatile bituminous (LVB) were conducted at various gas adsorption equilibrium pressures, following desorption diffusion performed. These simulated complete process fluid well...
Hydraulic fracturing can significantly enhance coalbed methane production, with in-situ stress playing a crucial role in this process. Our study focuses on calculating the deep 8+9# coal seam north-central Zijinshan block. Leveraging data from acoustic logging and hydraulic tests, we developed prediction model tailored to area’s geology. We analyzed stress’s impact behavior origins of mechanical anisotropy reservoirs using μ-CT imaging. results show that Anderson-modified model, accounting...
Numerical simulation was employed to investigate the propagation speed of pressure drop at drainage stage in coalbed methane (CBM) reservoirs. A seepage model single-phase water CBM reservoirs generated with parameter from well ZS39 Zhengzhuang block southern Qinshui Basin. The effects stress sensitivity and reservoir properties on process were analysed. Moreover funnel scale index introduced quantitatively characterize process. results indicate that cause permeability form funnel, which is...
Water content, metamorphism (coal rank) particle size, and especially pore structure, strongly influence the adsorption capacity of coal to methane. To understand mechanism methane in different rank coals, its controlling factors, isothermal experiments with ranks, moisture contents sizes at temperature 303.15 K were conducted. In addition, structures coals investigated through N2 adsorption/desorption low-temperature 77 for selected from Junggar Basin NW China, Qinshui Ordos north China....
The coalbed methane (CBM) resource in the southern Qinshui Basin, North China, is abundant. Proper understanding of geological control factors on CBM enrichment Anze Block Basin critical to design efficient development plan this area. Field and laboratory data including well logging, testing, hydraulic fracturing, groundwater chemical analysis were used evaluate characteristics hydrodynamic geostress, then, combined effect geostress field was analyzed. results show that total dissolved...
China hosts rich shale gas resources. The Longmaxi Formation (LF) in the Sichuan Basin is one of important regions for exploration and extraction. Here, we investigate pore structure factors influencing gas-bearing characteristics pores reservoirs LF. We employed scanning electron microscopy (SEM), X-ray diffraction analysis (XRD), content testing, saturation testing based on nuclear magnetic resonance (NMR), overburden porosity permeability analysis, distribution size, specific surface area...
Exploring the compressibility of deeply buried marine shale matrix and its controlling factors can help achieve efficient petroleum production. Taking ten sets core samples from Ning228 wells in Yanjin area as an example, pore characteristics reservoirs were investigated by applying mercury intrusion porosimetry (MIP) nitrogen adsorption/desorption isotherms at a low temperature 77 K. Mathematical models (based on MIP isotherms) established to analyze effects TOC, mineral components,...
Coal permeability measurement is significant for research on reservoir characteristics and development of coalbed methane. In order to find a favourable method obtain exact data coal permeability, two different methods are operated investigate evolution. Steady state applied with constant upstream gas pressure downstream keep difference. Permeability measured when velocity flow constant. Pulse transient pulse increment discharge through sample reservoir. calculated the reach new equilibrium...