A5007245685- Hydrocarbon exploration and reservoir analysis
- Coal Properties and Utilization
- Methane Hydrates and Related Phenomena
- NMR spectroscopy and applications
- Rock Mechanics and Modeling
- Atmospheric and Environmental Gas Dynamics
- Hydraulic Fracturing and Reservoir Analysis
- Coal and Coke Industries Research
- Microstructure and Mechanical Properties of Steels
- Advanced Materials Characterization Techniques
- Petroleum Processing and Analysis
- CO2 Sequestration and Geologic Interactions
- High-Temperature Coating Behaviors
Anhui University of Science and Technology
2023-2025
China University of Mining and Technology
2019-2024
Xiangtan University
2022
Heriot-Watt University
2022
Great Wall Motors (China)
2018
Low-field nuclear magnetic resonance has become one of the main methods to characterize static parameters and dynamic changes in unconventional reservoirs. The research focus this paper is process simulation coalbed methane (CBM) production. variation pore volume with different sizes during pressure drop, desorption-diffusion process, methane-water interaction migration discussed. Moreover, calculation principles NMR single multifractal models are systematically described, applicability...
Heterogeneity of adsorption pore volume distribution affects desorption and diffusion processes coal reservoirs. In this paper, N2 CO2 experiment tests were used to study the structure middle high rank reservoirs in area. The fractal theory surface area is achieve a full-scale pores (pore diameter less than 100 nm) Firstly, adaptability control factors fractals within same aperture scale range are studied. Secondly, characteristics micro-pores meso-pores Thirdly, different scales influencing...
Abstract Nuclear magnetic resonance (NMR) T 2 cutoff value is an important parameter for pore structure evaluation. It complicated and uneconomical to obtain by experimental method; therefore, it necessary explore a prediction method of value. In this paper, 10 samples tight gas reservoirs in the eastern Ordos Basin were selected, then saturation centrifugal experiments nuclear carried out. On basis, multifractal theory was introduced calculate characteristics NMR spectrum each sample,...
There exists differential swelling during the pure and competitive adsorption of CO2-CH4, whose mechanism was broad interest to CO2-ESGR (CO2 enhanced shale gas recovery) CCUS (carbon capture, utilization, storage) engineering. However, kerogen CO2-CH4 has been rarely reported, so is its significance. Here, atomic representation investigated using molecular simulation poromechanical model. Results indicated that ratios for systems CO2, CH4, a binary mixture CO2 + CH4 (mole ratio = 1:1)...
Methane adsorption of coal is essentially a process energy and material state transformation. It complex especially for tectonically deformed coals (TDCs). In order to clarify this process, 12 middle-rank TDCs were screened the experimental theoretical study. On basis liquid nitrogen experiment methane isothermal experiment, nanopore structure capacity TDC samples analyzed. Using theories Polanyi potential surface free reduction (SFER), variation in nanopores was explored. The following...
Water migration and methane desorption characteristics directly affect the performance of coalbed wells. In this paper, variability water in adsorption pores, seepage fractures were studied by laboratory simulation using an improved nuclear magnetic resonance displacement device. The results are as follows: Both adsorbed bulk decreased logarithmically with increase time under condition one-stop desorption. process can be divided into early rapid decline stage later slow stage. comparison to...
Abstract In this paper, the heterogeneity of adsorption pores in middle and high rank coal samples were analyzed by using low temperature N 2 CO technology fractal theory. The following results achieved. 1) According to volume surface dimension, meso‐pores can be classified into Mep‐1, Mep‐2, Mep‐3, respectively. Micro‐pore Mip‐1, Mip‐2, Mip‐3, 2) Pore types play an important role affecting meso‐pores. (VHY) Mep‐1 is simpler than that Mep‐2 Mep‐3 type A samples. However, VHY becomes...
The influence of the depressurization rate on coalbed methane desorption and percolation was studied using physical experiment numerical simulation. First, low-field nuclear magnetic resonance technology provided a new approach to conduct experiments with different schemes obtain compressibility (Cf) coal samples. Then, productivity calculation carried out via results showed that first-slow-then-fast (FSTF) scheme had highest efficiency (94%), followed by one-stop (85%), first-fast-then-slow...
In this paper, 12 sandstone samples are collected from the Taiyuan Formation in Qinshui Basin, and sample types using T2 spectral under LF-NMR saturation centrifugation conditions classified. Moreover, single multifractal models were used to calculate fractal parameters of saturated centrifugal spectra, correlation between different parameters, pore structure, T2cutoff value, permeability was studied. The results as follows. (1) According spectrum curves conditions, all can be divided into...
The process of coal measure gas accumulation is relatively complex, involving multiple physicochemical processes such as migration, adsorption, desorption, and seepage multiphase fluids (e.g., methane water) in strata. This constrained by factors, including geological structure, reservoir physical properties, fluid pressure, temperature. study used Well Z-7 the Qinshui Basin research object well numerical simulations to reveal generation, accumulation, dissipation history. results indicate...
The relevant literature indicates that coal facies have a significant impact on the pore structure and adsorption properties of deep reservoirs. content submicroscopic components is used to calculate parameters facies. Based traditional phase ash content, phases samples in study area were divided. potential theory, differences methane energy changes between different compared. results are as follows. wet herbaceous swamp (type A) could be divided into two subtypes by using yield: subtype A-1...