Conference Proceedings
Changes in Formation Water Composition during Water Storage at Surface and Post Re-injection
HP Vu, JR Black, RR Haese
Energy Procedia | ELSEVIER SCIENCE BV | Published : 2017
Abstract
Sub-surface operations such as geological carbon storage include the production, storage at surface and re-injection of formation water. Here we present results from a field-based experiment, detailing the important role of storage conditions controlling mineral dissolution and precipitation associated with the re-injection of production water. During water storage at surface, the cooling and degassing of CO2 from produced waters and oxygenation coincides with a decrease in dissolved ions, which indicate carbonates, silicates and iron oxyhydroxides precipitate. The re-injected water is undersaturated relative to carbonate minerals under reservoir conditions leading to their dissolution in th..
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Funding Acknowledgements
We thank graduate and undergraduate students Syed Anas Ali, Cesar Castaneda Herrera, Scott Ooi for their help executing the fieldwork. The authors wish to thank the CO2CRC Ltd. for receiving regulatory approval for this experiment and for providing project oversight and management. We also thank Lawrence Berkeley National Laboratory for access to the U-tube system, the site operator (Upstream Production Solutions), Mr Rajindar Singh (CO2CRC Ltd.) and Dr Chris Spero (COSPL) for their invaluable logistical and on-site support. In addition, we thank Dr Norifumi Todaka-san (JPower) for sharing ideas and contributions to the scientific discussion. We acknowledge funding provided by the CO2CRC Ltd and Callide Oxyfuel Services Pty Ltd (COSPL). COSPL is a joint venture between Australian and Japanese companies and governments.