What level of geological detail is required to give a meaningful representation of a reservoir model? Is it worthwhile to spend the time, money and effort to assemble a high-resolution geological model or will simpler models suffice? How coarse can a model be to provide the fastest possible execution while simultaneously preserving enough geological detail for realistic performance predictions?
To answer the holistic question of how much resolution needs to be preserved, a high resolution geological model of an outcrop of the Khuff formation (Oman) is used to develop a methodology to assess the impact of the preservation of geological heterogeneities. Sensitivity tests to various grid sizes have been carried out to determine what level of detail needs to be retained to achieve representative well production forecasts.