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- W2108103667 abstract "CO2 sequestration in the underground is a valid alternative approach for mitigat- ing the greenhouse effect. Nevertheless, very little is known about the effectiveness of CO 2 storage over very long periods. In this work we introduce a methodology to model the gas flow and monitor the storage. For this purpose, we integrate numerical simulators of CO 2- brine flow and seismic wave propagation. The simultaneous flow of brine and CO 2 is modeled with the Black-Oil formulation for two-phase flow in porous media, using PVT data as a sim- plified thermodynamic model. Wave propagation is based on an equivalent viscoelastic model that considers dispersion and attenuation effects. Densities and bulk and shear moduli are assumed to be dependent on pressure and saturation. The spatial pressure and CO 2 satura- tion distributions computed with the flow simulator are used to determine the phase velocities and attenuation coefficients of the P and S waves from White's model. Numerical examples of CO2 injection and time-lapse seismograms are analyzed. The proposed methodology is able to identify the spatio-temporal distribution of CO 2 after its injection, and constitutes an important tool to monitor the CO2 plume and analyze storage integrity, providing an early warning in case should any leakage may occur." @default.
- W2108103667 created "2016-06-24" @default.
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- W2108103667 date "2012-01-01" @default.
- W2108103667 modified "2023-09-28" @default.
- W2108103667 title "NUMERICAL MODELING OF FLUID FLOWAND TIME-LAPSE SEISMOGRAMS APPLIED TO CO2 STORAGE AND MONITORING" @default.
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