Fracture corridor identification through 3D multifocusing to improve well deliverability, an Algerian tight reservoir case study

Abstract

It is important to fully understand faulted systems in E&P, whether for a proper understanding of prospects, optimizing well locations or enhancing field development. The identification of fractured zones within a reservoir, usually characterized by sub-seismic faults, is often neglected but can add significant value to a project. This case study focuses on the very prolific Algerian Upper Ordovician tight reservoir target. It discusses a structure at the end of an appraisal well campaign, where an integrated fracture reservoir study has been performed in order to track subtle fault corridors. The use of advanced seismic attributes from 3D multifocusing has proven invaluable when identifying fracture corridors within the reservoir. Results match reasonably well with the fracture orientation and density interpretation from cores, borehole images, and DST interpretations. This approach has proven to be of great value when planning well trajectories and predicting production. In the future, it will be used to locate development wells.