We started continuous gravity monitoring using superconducting gravimeter at the Farnsworth CO2-EOR field. During the baseline measurements we detected the obvious decreasing trend, which is attributed to changes in the local water table. The CO2-EOR process will result in the redistribution of mass which may result in gravity signals, which is the principal signal of interest for this study. We must revise the observation plan to detect the subtle signals as precious as possible. With two SGs located in near sites making parallel SG and SG measurements can provide improved accuracy and sensitivity.
Sugihara, M., Nawa, K., Soma, N., Ishido, T., Miyakawa, A., & Nishi, Y. (2014). Continuous gravity monitoring for CO2 geo-sequestration (2) a case study at the Farnsworth CO2-EOR field. In Energy Procedia (Vol. 63, pp. 4404–4410). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2014.11.475