Investigation of thermal stimulation of coal seam gas fields for accelerated gas recovery

Shahtalebi, Ali, Khan, Chawarwan, Dmyterko, Anastasia, Shukla, Pradeep and Rudolph, Victor (2016) Investigation of thermal stimulation of coal seam gas fields for accelerated gas recovery. Fuel, 180 301-313. doi:10.1016/j.fuel.2016.03.057


Author Shahtalebi, Ali
Khan, Chawarwan
Dmyterko, Anastasia
Shukla, Pradeep
Rudolph, Victor
Title Investigation of thermal stimulation of coal seam gas fields for accelerated gas recovery
Journal name Fuel   Check publisher's open access policy
ISSN 0016-2361
Publication date 2016-09-15
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.fuel.2016.03.057
Open Access Status Not Open Access
Volume 180
Start page 301
End page 313
Total pages 13
Place of publication Oxford, United Kingdom
Publisher Elsevier
Collection year 2017
Language eng
Formatted abstract
In coal seam gas production, interventions to increase well productivity from poorly performing wells need to be matched to the nature of the coal, which may include: fracture stimulation if the permeability is low; and matrix stimulation if gas flow is restricted by the matrix diffusion. Increasing the coal bed temperature will assist in matrix stimulation by increasing the diffusion flux and in-turn enhance the well productivity.

Four different coal samples were studied against the temperature influence on methane storage as well as its transport inside the pores. It is found that a change in temperature, for e.g. ΔT ∼ 40 °C, may be expected to cause a three to four fold improvement in diffusivity. The experimental data was utilized in theoretical simulation of coal seam bed. By increasing the bed temperature, the total amount of methane recovered is higher, however, the economic benefit of extra methane produced is too small to justify the thermal stimulation of the bed. The true benefit of thermal stimulation lies in the enhanced rate of recovery which results in improving the NPV of the produced gas. Several production-well case scenarios were examined to determine the favourable conditions for implementing thermal stimulation technique and to determine if such a method could be commercially implemented on the field.
Keyword Thermal stimulation
Coal seam gas
Diffusion
Permeability
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
School of Chemical Engineering Publications
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Created: Thu, 21 Apr 2016, 11:30:21 EST by Charwarwan Khan on behalf of School of Chemical Engineering