A review of laboratory study on enhancing coal seam permeability via chemical stimulation

H Li, J He, J Lu, B Lin, Y Lu, S Shi, Q Ye - Fuel, 2022‏ - Elsevier
Chemical stimulation is a potential technology for coal permeability enhancement.
Develo** chemical stimulation techniques and understanding its mechanism are …

Experimental study on erosion mechanism and pore structure evolution of bituminous and anthracite coal under matrix acidification and its significance to coalbed …

J He, H Li, W Yang, J Lu, Y Lu, T Liu, S Shi - Energy, 2023‏ - Elsevier
Acid fracturing is a potential method to resolve the mineralization restriction around wellbore
and enhance the permeability in coalbed methane extraction. The previous study mainly …

Spectroscopic (FTIR, 1H NMR) and SEM investigation of physicochemical structure changes of coal subjected to microwave-assisted oxidant stimulation

H Li, C Xu, G Ni, J Lu, Y Lu, S Shi, M Li, Q Ye - Fuel, 2022‏ - Elsevier
Owing to the sub-economic permeability, coalbed methane (CBM) reservoir usually requires
stimulation. Novel CBM stimulation approaches have been proposed such as CO 2 …

The effect of anionic surfactant (SDS) on pore-fracture evolution of acidified coal and its significance for coalbed methane extraction

NI Guanhua, X Hongchao, L Shang, S Qian… - Advanced Powder …, 2019‏ - Elsevier
Adding the compound solution included hydrochloric acid and hydrofluoric acid into coal
seam, the pore structure of coal can be destroyed by acidizing treatment, and the …

Study on the microstructural characteristics of coal and the mechanism of wettability of surfactant solutions at different pH levels

Z Liu, L Jiao, H Yang, M Zhu, M Zhang, B Dong - Fuel, 2023‏ - Elsevier
The effect of acidity and alkalinity of mine water on the ability of surfactants to wet coal was
studied with contact angle measurements to determine the optimal aqueous surfactant …

Effects of acid-based fracturing fluids with variable hydrochloric acid contents on the microstructure of bituminous coal: An experimental study

W Zepeng, G Zhaolong, L Ruihui, L **anfeng… - Energy, 2022‏ - Elsevier
Acid based fracturing fluid (AFF) with appropriate hydrochloric acid (HCl) content is not only
conducive to the exploitation of coalbed methane (ECBM), but also can reduce the cost and …

Evolution of the pore structure and fractal characteristics of coal under microwave-assisted acidification

J Lu, C Zheng, W Liu, H Li, S Shi, Y Lu, Q Ye, Y Zheng - Fuel, 2023‏ - Elsevier
Coal reservoir usually requires stimulation to enhance coalbed methane (CBM) production.
As a novel stimulation method, microwave heating contributes to methane desorption and …

Effects of acid solution of different components on the pore structure and mechanical properties of coal

S Li, G Ni, H Wang, M Xun, Y Xu - Advanced Powder Technology, 2020‏ - Elsevier
To explore the influence of acid solution with different components on the pore structure and
mechanical properties of coal, nuclear magnetic resonance (NMR), scanning electron …

Effects of different concentrations of weak acid fracturing fluid on the microstructure of coal

G Rui, Z Shaojie, S Junting, L Chengwei… - Natural Resources …, 2024‏ - Springer
As a crucial factor that influences the hydraulic fracturing effectiveness of coal seams,
fracturing fluids have garnered increasing attention. Among them, acid fracturing fluids have …

Variations in the pore structure and fluid mobility under anionic surfactant assisted matrix acidification of coal based on nuclear magnetic resonance T1-T2 spectra

J He, H Li, J Lu, W Yang, B Lin, M Liu, Y Lu, S Shi… - Fuel, 2024‏ - Elsevier
Matrix acidification is a potential method for increasing the permeability of coalbed methane
reservoirs. However, current research on the acid corrosion process is still unclear, and acid …