A new approach for modeling adsorption kinetics and transport of methane and carbon dioxide in shale

In this article, a new approach is proposed to investigate adsorption kinetics and transport of gases in shale. Due to co‐existence of pores with different size in the shale, a set of adsorption processes happened in pores of different sizes are considered. A first‐order multi‐process model is devel...

Full description

Saved in:
Bibliographic Details
Published in:AIChE journal 2022-04, Vol.68 (4), p.n/a
Main Authors: Gu, Min, Xian, Xue‐fu, Miao, Beizeng, Chen, Xusong, Du, Xidong, Liu, Zhengyang, Xu, Ran
Format: Article
Language:English
Subjects:
Adsorption
adsorption kinetics
Carbon dioxide
Diffusion
Gas seepage
Gaseous diffusion
Kinetics
Methane
modeling
Modelling
pore size distribution
Pores
Seepage
Shale
Shale gas
Shales
transport
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this article, a new approach is proposed to investigate adsorption kinetics and transport of gases in shale. Due to co‐existence of pores with different size in the shale, a set of adsorption processes happened in pores of different sizes are considered. A first‐order multi‐process model is developed, which can perfectly fit the adsorption kinetic data of CH4 and CO2 obtained at different temperatures. The modeling and pore characterization results indicate that an adsorption process happens in micropores/mesopores (50 nm) in the Wufeng shale. Gas diffusion mechanism is dominant in micropores/mesopores, and gas seepage mechanism is dominant in macropores. The effective diffusivity of CO2 is smaller than that of CH4, because the adsorption of large amount of CO2 in the pores hinders its diffusion. The coefficients related to the diffusion and seepage have no obvious trend with temperature.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.17578