Validating 4D seismic with reservoir surveillance data: A practical example offshore Equatorial Guinea, West Africa

摘要

This case study describes the impact of integrating time-lapse (4D) seismic data with reservoir surveillance and production data for the Oveng field area of Okume Complex Field, located offshore Equatorial Guinea, West Africa. Aging assets on production decline can greatly benefit from 4D seismic to determine infill drilling locations as well as support reservoir management practices, but only when the seismic data has been validated against multiple other datasets to produce a robust interpretation. This case study describes a multi-disciplinary, collaborative effort towards validating 4D seismic with historical production data along with field surveillance data such as repeat saturation logs, and highlights examples of providing new information for building a more accurate geomodel as well as influencing infill well planning and drilling. The key message is that once all data have been screened and integrated, informed decisions can be made to optimize the value of the asset.