About This Item
- Full TextFull Text(subscription required)
- Pay-Per-View PurchasePay-Per-View
Purchase Options Explain
Share This Item
The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
AAPG Bulletin, V.
2014. The American Association of Petroleum Geologists. All rights reserved.
DOI: 10.1306/03241413134
Compressibility of sorptive porous media: Part 2. Experimental study on coal
Shimin Liu1 and Satya Harpalani2
1 Pennsylvania State University, Department of Energy and Mineral Engineering, University Park, Pennsylvania 16802; [email protected]
2 Southern Illinois University, Department of Mining and Mineral Resources Engineering, Carbondale, Illinois 62901; [email protected]
ABSTRACT
This paper, second of a two-part series, discusses the results of the experimental work conducted to estimate the different compressibilities of coal under both unconstrained and constrained conditions. Under unconstrained conditions, the shrinkage or swelling compressibility (C m) was measured, which was found with certainty to be a pressure-dependent parameter. The model proposed to estimate 
was able to effectively predict the variation trend, although the modeled values were larger than those calculated using experimental results. The pore-volume compressibility 
under uniaxial strain conditions for helium depletion was found to be a constant positive value. The value of 
for methane depletion, however, was found negative, indicating that the pore volume (cleat) increases with depletion. Moreover, its absolute value increased with decreasing methane pressure. Consistent with field permeability observations, the permeability increases with methane depletion, and the rate of increase at lower pressures is higher than at high pressures. The proposed pore-volume compressibility model was well able to predict the variation.
Pay-Per-View Purchase Options
The article is available through a document delivery service. Explain these Purchase Options.
| Watermarked PDF Document: $14 | |
| Open PDF Document: $24 |
AAPG Member?
Please login with your Member username and password.
Members of AAPG receive access to the full AAPG Bulletin Archives as part of their membership. For more information, contact the AAPG Membership Department at [email protected].