Gas Diffusion Coefficient in Tight Sandstones: An Experimental Approach Under Various Controlling Factors.
Saved in:
| Title: | Gas Diffusion Coefficient in Tight Sandstones: An Experimental Approach Under Various Controlling Factors. |
|---|---|
| Authors: | Zhao, Zhongying1 (AUTHOR) zhaozhongying@petrochina.com.cn, Lu, Shan1 (AUTHOR), Zhang, Lijun1 (AUTHOR), Pan, Shouxu2 (AUTHOR) cumtpsx@126.com, Chen, Tao (AUTHOR) pmishra@wiley.com |
| Source: | Geofluids. 3/20/2026, Vol. 2026, p1-24. 24p. |
| Subject Terms: | *Diffusion kinetics, *Temperature effect, *Clay minerals, *Sandstone, *Permeability, *Porosity |
| Abstract: | This study investigates the natural gas diffusion coefficients in tight sandstones, emphasizing the Sulige area′s geological conditions. Through experimental measurements and the simulation of natural gas diffusion processes, we explore the impact of various geological factors—including temperature, pressure, porosity, permeability, pore throat radius, and clay content—on gas diffusion coefficients. Our findings reveal that temperature and porosity positively influence diffusion, aligning with molecular collision theory, and displaying a linear relationship with the diffusion coefficient, respectively. Conversely, pressure and clay content negatively affect diffusion, with coefficients showing exponential decreases under higher pressures and increased clay content. Permeability and pore throat radius enhance diffusion in a logarithmic manner. Building on these individual relationships, we developed a multifactor model to accurately predict the gas diffusion coefficients in tight sandstones under diverse geological settings. Validation with the actual sample measurements confirms the precision of our model and its applicability across different geological periods and conditions. Our research offers valuable insights into understanding natural gas diffusion in tight sandstones, providing a solid foundation for further exploration and exploitation strategies in similar geological settings. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| Abstract: | This study investigates the natural gas diffusion coefficients in tight sandstones, emphasizing the Sulige area′s geological conditions. Through experimental measurements and the simulation of natural gas diffusion processes, we explore the impact of various geological factors—including temperature, pressure, porosity, permeability, pore throat radius, and clay content—on gas diffusion coefficients. Our findings reveal that temperature and porosity positively influence diffusion, aligning with molecular collision theory, and displaying a linear relationship with the diffusion coefficient, respectively. Conversely, pressure and clay content negatively affect diffusion, with coefficients showing exponential decreases under higher pressures and increased clay content. Permeability and pore throat radius enhance diffusion in a logarithmic manner. Building on these individual relationships, we developed a multifactor model to accurately predict the gas diffusion coefficients in tight sandstones under diverse geological settings. Validation with the actual sample measurements confirms the precision of our model and its applicability across different geological periods and conditions. Our research offers valuable insights into understanding natural gas diffusion in tight sandstones, providing a solid foundation for further exploration and exploitation strategies in similar geological settings. [ABSTRACT FROM AUTHOR] |
|---|---|
| ISSN: | 14688115 |
| DOI: | 10.1155/gfl/3513630 |
