- © 2001. AAPG/DEG
The GEODISC research program is being jointly funded by the Australian government and several of the nation’s gas producers. It is designed to address key technical, commercial, and environmental issues associated with geological sequestration of CO2 in Australia. Some of the largest point source emitters of CO2 in Australia are liquefied natural gas (LNG) plants. As some of the gas fields to be developed in the near future have higher CO2 content than currently producing fields, emissions are projected to increase. GEODISC is currently in year two of its planned 4-year program. The results of the research will have application both within Australia and internationally. The work is being done initially at a regional scale, examining all potential sedimentary basins in Australia, followed by detailed analysis at the most promising sites. Comparison of the sites at the regional scale is being done using deterministic risk analysis. Data from Australian reservoirs show large variance to that used in the published reservoir simulations from Europe. As such, research is being focused into topics, such as storage efficiency, that are considered critical to the successful implementation of the findings from GEODISC. Results to date indicate that there is excellent potential to sequester CO2 in all of the major sedimentary basins of Australia. Estimates to date from only 49 sites (ignoring the specific economic viability of individual sites), indicate that there is a risked total pore volume capacity to store 1000 times the annual (1998) emissions of CO2 for Australia. The actual total capacity value of sedimentary basins to sequester CO2 is likely to be several orders of magnitude higher than this figure.
Key Words: Australia, GEODISC, sequestration, CO2, storage efficiency, risk.
John Bradshaw is project manager of Project 1 (Regional Analysis) in the GEODISC research project at the Australian Petroleum Cooperative Research Centre. He has a B.Sc. (Honors) and Ph.D. in Applied Geology from the University of New South Wales. John is an exploration technologist with a regional knowledge of Australian sedimentary basins and is employed as a principal research scientist at the Australian Geological Survey Organisation. He has also worked for Esso (Aust.) and on staff exchange for a year with WMC Petroleum and Ampolex/Mobil. He has extensive fieldwork experience throughout central Australia and Papua New Guinea, where he consulted for several years. John has previously run major industryfunded research projects examining the petroleum systems of Australia. He is a member of GSA, PESA, and AAPG.
Andy Rigg is the program manager for the GEODISC research program with the Australian Petroleum Cooperative Research Centre (APCRC) and is based in Sydney. He has a B.Sc. andB.Sc. (Honors) in Geology (University of Sydney and University of Tasmania). He has 30 years of experience in the oil and gas industry. He was geological manager for Esso Australia before becoming general manager of exploration with Santos. From 1985 to 1997 he was general manager of exploration for Ampolex Limited. He has been nonexecutive director for several listed Australian oil and gas companies and occupies this position for Timor Sea Petroleum NLNatural Gas Australia Ltd. and Methanol Australia Pty Ltd. He is a member of PESA (past federal president and distinguished member).