This paper demonstrates how a holistic modeling approach and multidisciplinary integration were used to plan the longer-term development of a recent, promising discovery.

The Sitra field was discovered in 1983. Three subsequent appraisal wells discovered additional reservoirs. The wells also demonstrated that sand prediction and lateral connectivity would be a dominant challenge to field development..

A joint SENV/BAPETCO/EPTS multi-disciplinary project was initiated to help plan the further appraisal and development of the field. The static model was to become the backbone of the subsurface work. The model had to be useable for both immediate and longer term field development planning and had to fulfill the requirements of various departments.

Well engineering safety guidelines required the conservative 3D rendition of the main bounding fault. Petroleum engineering required the most realistic structural model for the main area of the field and boundary fault.

In the main reservoir, multi-disciplinary integration played a key role in the construction of the geological model. The background was provided by a recent regional study. AVO inversion provided results that could only be used qualitatively, but a seismic Stratigraphic interpretation integrated with sequence Stratigraphic well correlation and sedimentlogical core description did indicated the potential presence Tidal Channel/Bar system which fit in the context of all other subsurface data. The resulting conceptual model is of an Delta/Submarine depositional system in which high quality channel sands are concentrated in two NNE-trending systems. The 3D Facies model was constructed accordingly.

This static model was fully history matched and used to forecast alternative development scenarios for this Oil/Gas reservoir, providing a strong basis for future reserves reassessments.

Integration across disciplines, organizations and locations was critical in project delivery. The common 3D Grid helped in sharing information between different teams and reinforced cooperation. Remote working tools were important in the transfer, handover and sharing of information and models.

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