Distributed Acoustic Sensing for Reservoir and CO2 Storage Monitoring

Abstract

Summary Distributed Acoustic Sensing (DAS) is a fibre optic technology with numerous applications in oil and gas. DAS data can be acquired from fibres deployed downhole, in seafloor cables, or in cables buried in the shallow subsurface. Today, DAS is commercially available for recording active and passive seismic data (e.g., VSP and Microseismic), and Noise and Flow logging data, and for these applications new developments are focusing more into better processing, more quantitative methods, big data management, automation, integration, and visualization. In parallel, the industry continues maturing more complex DAS applications, such as those related to monitoring deformation, well integrity, and reservoir pressure. In parallel to these developments, we are now adapting distributed fibre optics for monitoring Carbon Capture and Storage (CCS) projects, which have many similarities but also important differences in terms of sensitivity, cost and data availability requirements, among others. In this talk, I intend to show examples of the use of DAS in reservoir monitoring, and examples of the role that distributed fibre optics in general is having in the MMV (Measuring, Monitoring and Verification) plan of current CCS projects.