Methane emissions from CSG well completion activities
About the document
At present there are no public data on methane emissions from coal seam gas well completions specific to Australian operations. Accordingly, the federal Department of the Environment and Energy provided funding to CSIRO Energy to undertake a study to determine CH4 emissions from actual well completions.
The aim of this study was to measure fugitive methane emissions from well completion and workover activities at both hydraulically fractured and non-fractured wells with the view to assisting the Department of the Environment and Energy in developing Australian-specific emission factors for these operations. Due to time limitations, emission measurements were not made from hydraulic fracturing operations, although two of the selected wells had been hydraulically fractured previously. Measurements were made opportunistically on a small number of wells that were being completed or worked over at the time instrumentation was available in the field. These wells and the completion procedures used during the measurements were typical of others in these production fields.
The results of this study were used to update the methods in the National Greenhouse Accounts for Australia's 2017 submission to the United Nations Framework Convention on Climate Change (UNFCCC) and under the Kyoto Protocol.