Unlocking seismic monitoring of stiff reservoirs with 4D OBN: A case study from Brazil pre-salt
Denis Kiyashchenko, W. Wong, Dalila Cherief, Dan Clarke, Yuting Duan, Paul Hatchell
Abstract
Time-lapse seismic monitoring is a proven technology for increasing ultimate recovery. However, small 4D changes in stiff reservoir rocks masked by noise poses limits to its use. We share our experience with tracking fluid injection signals in a Brazilian pre-salt carbonate reservoir with time-lapse OBN. The development of novel methods to characterize water velocity variations and application of advanced time-lapse matching has helped to maximize the repeatability. This new workflow reveals meaningful 4D amplitude and time-shift signals, which further consolidates 4D monitoring as a viable surveillance technique in pre-salt carbonates and similar challenging settings. Presentation Date: Wednesday, October 14, 2020 Session Start Time: 9:20 AM Presentation Time: 9:20 AM Location: Poster Station 2 Presentation Type: Poster