ACARP ACARP ACARP ACARP
Mine Site Greenhouse Gas Mitigation

Variability in Gas Reservoir Parameters that Impact on Emissions Estimations for Australian Black Coals

Mine Site Greenhouse Gas Mitigation » Mine Site Greenhouse Gas Mitigation

Published: June 06Project Number: C13071

Get ReportAuthor: Joan Esterle, Renate Sliwa, Ray Williams, Meredith Malone | CSIRO Exploration & Mining, GeoGAS

A database of some 2000 boreholes with confidential measurements of gas reservoir parameters of various seams from mines across the Hunter Valley and Central Bowen Basin coalfield were compiled to examine the inherent variability of parameters used to estimate gas emissions from coal. The study was prompted by a need to understand this variability and its impact on estimating fugitive greenhouse gas emissions from open cut and underground mines using global emissions factors.

The results demonstrate that only one gas reservoir parameter (gas sorption capacity) follows measurable coal properties such as rank and type for differing pressures and temperatures. Actual gas contents do not always match theoretical capacity and all reservoir properties, in particular gas content, seam thickness and permeability, vary greatly at the mine scale. This in situ variability at the mine scale, coupled with varying approaches to mine gas management makes it almost impossible to develop emissions factors for coalfield or basin scales with a reasonable level of certainty, much more be extrapolotated to state and country scales. Current default fugitive emissions factors per tonne of coal mined can be considered ballpark relative to actual in-ground gas contents, which introduces high levels of uncertainty relative to the tonnages mined.  

As has been suggested by various guidelines for the estimation of fugitive greenhouse gas emissions, the most reliable estimations are made at the mine scale from measurement and monitoring. Mine scale estimations can be improved by taking a domain approach, where depth and pressure relationships are relatively stable and within which the variability of reservoir parameters is reduced to some degree.

Although it is outside the scope of this study, the next logical steps are to conduct a series of Tier 3 mine scale studies and then compare them to estimations made by applying Tier 2 formulae and/or to develop sets of calibrated emission models that take account of both the varying reservoir properties and the mining process.  For underground mining, the data are readily available from current monitoring systems. For open cut mines, this requires the development of efficient and effective measurement and monitoring systems. These types of projects are already underway.

The authors are indebted to the coal companies who provided confidential and sensitive information for use in this study and thank ACARP and its monitors for their support and patience in delivery of this project.

Underground

Health and safety, productivity and environment initiatives.

Underground

Open Cut

Safety, productivity and the right to operate are priorities for open cut mine research.

Recently Completed Projects

C19024Establishing Ecologically Sustainable Mine Water Release Criteria In Seasonally Flowing Streams

Extreme rainfall conditions in the Fitzroy Catchment over an approxi...

C25030Coal Mine Open Pit Final Void Closure And Relinquishment - Addressing Uncertainty In Coal Mine Environmental Planning

This report addresses uncertainties faced by coal mine operators whe...

C27046Estimation Of True Deformation Vector From Slope Radar Monitoring

Slope deformation radar monitors are now widely used in open cut coa...

Open Cut

Coal Preparation

Maximising throughput and yield while minimising costs and emissions.

Recently Completed Projects

C27004Improving Coal Flotation With Oscillatory Air Supply

This report provides detailed information on coal flotation with os...

C25018Improving Solids Recovery And Moisture Reduction In Ultrafine Coal Dewatering

This report provides detailed information on fine coal dewatering in...

C27028Lab Froth Flotation Testing Guide With Coal Quality

Correct outcomes from laboratory froth flotation testing in coal bor...

Coal Preparation

Technical Market Support

Market acceptance and emphasising the advantages of Australian coals.

Recently Completed Projects

C26039Nanoporosity In Cokes: Their Origin, Control And Influence On CO2 Reactivity

This project using the outcomes of previous project C24060, examine...

C28063A Comprehensive Technical Review Of High-Efficiency Low-Emission (HELE) Pulverised Coal Combustion Technologies For Power Generation

Research and development has been undertaken worldwide to realise co...

C28064Carbon Structure Transformation During Coking Of Australian Coking Coals: Better Understanding The Coke Formation

Carbon structures of coke that are formed during the plastic layer a...

Technical Market Support

Mine Site Greenhouse Gas Mitigation

Mitigating greenhouse gas emissions from the production of coal.

Recently Completed Projects

C28076Selective Absorption Of Methane By Ionic Liquids (SAMIL) - Phase 2 Demonstration In A Packed Bed Reactor

An alternative approach to high temperature oxidation of ventilation...

C26004CFD Modelling Of Reverse Thermal Oxidisers For VAM Abatement - CFD Modelling Of Fixed-Bed RTO Devices

The project is part of a larger multi‐phase program of study a...

C27058Technological Assessment Of A Recycle Reactor For VAM Abatement

Underground coal mining emits high volumes of methane, diluted in ve...

Mine Site Greenhouse Gas Mitigation

Low Emission Coal Use

Step-change technologies aimed at reducing greenhouse gas emissions.

Recently Completed Projects

C17060BGasification Of Australian Coals

Four Australian coals were trialled in the Siemens 5 MWth pilot scale ga...

C17060AOxyfuel Technology For Carbon Capture And Storage Critical Clean Coal Technology - Interim Support

The status of oxy-fuel technology for first-generation plant is indicate...

C18007Review Of Underground Coal Gasification

This report consists of a broad review of underground coal gasification,...

Low Emission Coal Use

Mining And The Community

The relationship between mines and the local community.

Recently Completed Projects

C16027Assessing Housing And Labour Market Impacts Of Mining Developments In Bowen Basin Communities

The focus of this ACARP-funded project has been to identify a number...

C22029Understanding And Managing Cumulative Impacts Of Coal Mining And Other Land Uses In Regions With Diversified Economies

The coal industry operates in the context of competing land-uses that sh...

C23016Approval And Planning Assessment Of Black Coal Mines In NSW And Qld: A Review Of Economic Assessment Techniques

This reports on issues surrounding economic assessment and analysis ...

Mining And The Community

NERDDC

National Energy Research,Development & Demonstration Council (NERDDC) reports - pre 1992.

Recently Completed Projects

1609-C1609Self Heating of Spoil Piles from Open Cut Coal Mines

Self Heating of Spoil Piles from Open Cut Coal Mines

1301-C1301Stress Control Methods for Optimised Development...

Stress Control Methods for Optimised Development and Extraction Operations

0033-C1356Commissioned Report: Australian Thermal Coals...

Commissioned Report: Australian Thermal Coals - An Industry Handbook

NERDDC