GHGT-16 – FRUGAL CALIBRATION AND SURVEILLANCE OF CO2 UNDERGROUND STORAGE WITH SEISMIC

Paper presented at the GHGT-16 Lyon, France September 2022, presented by Habib AL KHATIB Written by: Jean-Luc Mari  V. Brun¹, J. Costa De Sousa¹, E. Morgan¹ – ¹ SpotLight

Abstract

CO2 underground storage should reach 1.6 Gt CO2 per year by 2030 to be aligned with the Green House gas control objectives [1]. This development is opening a massive need for Monitoring,
Measurement and Verification (MMV) methods.

Driven by regulation, Carbone Capture Storage (CCS) projects will have to rely on long term monitoring strategy (50-100 years) [2] that need to be :
• Operationally VIABLE
• Economically VIABLE
• Environmentally VIABLE

D seismic images have been proven to be the technically most appropriate technology for CO2 storage monitoring [4]. The paradox appears: even if frequent full 4D monitoring is technically doable, the more often new images are acquired, the more cost and environmental footprint are increasing. Therefore frequent full-scale 4D seismic are too heavy to represent a viable solution [2].

In this paper we will present a focus seismic monitoring approach that capitalizes on existing data & the capability of seismic to accurately detect CO2 to propose frequent detection on key area to validate or invalidate the reservoir model.