--> Integrated Approaches Expedite Geologic Models and Well Planning in the Bose Deepwater Development OPL209, Nigeria, by Paul Brown, Wasiu Odufisan, Martin Eze, Earl Fashbaugh, Lincoln Foreman, Patrick Kenney, Rebecca Saltzer, and Astri Sokn; #90037 (2005)

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Integrated Approaches Expedite Geologic Models and Well Planning in the Bose Deepwater Development OPL209, Nigeria

Paul Brown1, Wasiu Odufisan1, Martin Eze1, Earl Fashbaugh2, Lincoln Foreman3, Patrick Kenney1, Rebecca Saltzer3, and Astri Sokn1
1 ExxonMobii Development Company, Houston, TX
2 Esso Exploration and Production Nigeria, Ltd, Lagos, Nigeria
3 ExxonMobil Upstream Research Company, Houston, TX

Deepwater developments require fast-track reservoir characterization and well planning to progress project timelines. New workflows have successfully integrated 3D-seismic data and limited well control at Basi Field, OPL 209, Nigeria, accelerating delivery of a robust geologic model with optimal well placement in support of a field development plan.

Spectral component geologic modeling (SCGM) provides a faster alternative than traditional map-based analysis in the Basi deepwater channel complex. SCGM separates data into three distinct frequency components, preserving the integrity of information from different sources and scales. Seismic-band data, generated by inversion, is transformed into mid-frequency lithofacies probability to guide sand distribution and depositional geometry in the model. The mid-frequency lithofacies are then merged with low and high frequency components, derived from interpreted environments of deposition, analogues, and well data. The full-band model captures stratigraphic detail while reducing high-effort mapping. SCGM components were imported into a 3D-well planning toolkit to optimize development wells for the Bosi Field.

Other data can also be integrated as needed including structural framework, offset wells, and simulation results. The toolkit readily visualizes planned well paths for testing against different sand connectivity scenarios, facilitating collaboration between well planner, interpreter, and engineers. As a result, well targeting, design, and sequencing are improved. This is critical to ensure deliverability and to determine the appropriate reservoir management strategy to meet production forecasts.