H53H-1761
Tracking CO2 Geosequestration Using Downhole Gravity Gradiometry, Otway Basin, Victoria, Australia.

Friday, 18 December 2015
Poster Hall (Moscone South)
Samuel Matthews and Craig O'Neill, Macquarie University, Sydney, NSW, Australia
Abstract:
Carbon dioxide sequestration is a vital technique for the mitigation of greenhouse gas emissions and anthropogenic global warming. The viability of CO2 geosequestration, and the ability to prevent any leakage or migration depends on the capacity to monitor, and model, the CO2 reservoir. Downhole gravity gradiometry offers an additional capability to CO2 monitoring, and here we demonstrate the downhole gradient effect of COinjection at the Otway Basin, Victoria, by the CO2CRC corporation. Data from reservoir modelling has been simulated to calculate gravity gradients to gain an understanding of the behaviour of CO2 once injected into geological storage. Monte Carlo simulations were utilised to determine the uncertainties inherent in the deep subsurface. Presently; models have been created to demonstrate the response caused by the injection of CO2, and we present a statistical analysis to constrain the uncertainties posed by the results.