Evolution of seismic responses due to CO2 injection in carbonates including chemical reactions and rock-physics model

L. G. Rodrigues, J. P. Nunes, Dominique Guerillot

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The increase in worldwide activities related to CO2 injection in geological formations, for both EOR/CO2 and CCS projects, has pushed oil companies and universities to enhance the modeling of these processes for their better designing and monitoring. This paper describes new improvements for these aspects through a multi-disciplinary methodology incorporating rock physics into flow simulations to predict the changes in petrophysical and elastic parameters of the reservoir rock. When injecting CO2 in carbonates, one of the critical aspects is to understand the chemical reactions occurring between the CO2, the in-situ water and the carbonate matrix. The mathematical formulation of the simultaneous thermodynamic equilibrium and the chemical reactions will be described. An application of effective medium theory is described to model the seismic response of the flow. This paper demonstrates the practicality of the modeling and software tools to address the design and monitoring of CO2 injected in geological formations for CO2/EOR or CCS. It helps the geophysicists and reservoir engineers to define injection plans and seismic campaigns. Technical contributions: -Multi-phase flows on carbonate reservoirs with multi-phase thermodynamic equilibrium and geochemical reaction, -Petroelastic modeling to construct synthetic seismograms, -Integrated methodology to improve the quality of the full-field forecast including time-lapse feasibility.

Original languageEnglish
Title of host publicationECMOR 2012 - 13th European Conference on the Mathematics of Oil Recovery
PublisherEuropean Association of Geoscientists and Engineers, EAGE
Publication statusPublished - 2012
Externally publishedYes
Event13th European Conference on the Mathematics of Oil Recovery, ECMOR 2012 - Biarritz, France
Duration: 10 Sep 201213 Sep 2012

Other

Other13th European Conference on the Mathematics of Oil Recovery, ECMOR 2012
CountryFrance
CityBiarritz
Period10/9/1213/9/12

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ASJC Scopus subject areas

  • Geophysics

Cite this

Rodrigues, L. G., Nunes, J. P., & Guerillot, D. (2012). Evolution of seismic responses due to CO2 injection in carbonates including chemical reactions and rock-physics model. In ECMOR 2012 - 13th European Conference on the Mathematics of Oil Recovery European Association of Geoscientists and Engineers, EAGE.