Geologic Sequestration: Modeling and Monitoring Injected CO2

Abstract

TX 75083-3836, U.S.A., fax 01-972-952-9435.Abstract CO 2 Sequestration has been proposed as a possible means of achieving sustainable development objectives and calls upon petroleum industry technology and expertise. Commercial application of long-term CO 2 sequestration depends in large part on the ability to effectively model and verify the movement of injected gas. Software has been developed to both simulate CO 2 migration and to predict seismic responses as a function of time. The co-simulation of fluid flow and reservoir geophysical parameters during the life of the reservoir provides useful information about the feasibility and optimal timing of 3D time-lapse (4D) seismic surveys. When CO 2 sequestration is combined with EOR processes, the integrated flow model has the potential to help locate bypassed reserves, and to aid the reservoir characterization process by decreasing seismic processing time. The purpose of this paper is to demonstrate the applicability of the integrated flow model to CO 2 sequestration. An example using a dome-structured aquifer illustrates the technology.

A multiscale algorithm for the mineralization process during supercritical carbon dioxide injection into a deep saline aquifer

“…The purpose was to determine the optimal point of injection to maximize CO 2 storage during an oil-recovery procedure. Fanchi (2001) conducted a study of the coupling between CO 2 motion and seismic response. Pruess et al (2003) and Xu et al (2003) used a detailed geochemical model to study the interactions between the fluid and the rock during a radial flow.…”

Acoustic, elastic and poroelastic simulations of CO2 sequestration crosswell monitoring based on spectral-element and adjoint methods

“…However, a common strategy is to perform time-lapse seismic imaging in acoustic or elastic models, using Gassmann's formulae (Gassmann 1951) to account for saturation effects (e.g. Brinks & Fanchi 2001;Arts et al 2004). To our knowledge, in this context the only work based on Biot's poroelastic theory (Biot 1956a) is by Carcione et al (2006), who present an extensive study describing the physics of the CO 2 storage zone, taking the Sleipner field in the North Sea as an example.…”