Integrated 3D reservoir modelling for the unconventional reservoir prospects: a case study of Upper Cretaceous Brown Limestone reservoir, South Geisum field, Gulf of Suez, Egypt

The Gulf of Suez basin (GOS) hosts over eighty conventional oilfields spanning from the Pre-Cambrian to the Recent. This research focuses on a segment of the (GOS) sequence within the territories managed by PGM Company. It outlines a methodology for evaluating unconventional resource potential within the Brown Limestone interval of Upper Cretaceous age in this region. The Brown Limestone interval serves not only as a crucial source rock but also as a fractured reservoir widespread across many oilfields. Due to intricate reservoir architecture, diverse lateral variations in facies and the heterogeneity of the reservoir quality, uncertainties prevail. These challenges impede the optimization of reservoir exploitation throughout the GOS Basin. This study employs an integrated approach utilizing diverse datasets and techniques to ascertain the precise structural setting, property attributes of the Upper Cretaceous Brown Limestone and forecast its complex geometry in three-dimensional space within the study area. The study aims to assess the reservoir and trap heterogeneity under various scenarios to create a robust 3D static model dictating the structural and property complexities. The objective of the model is to enhance the precision of reserve estimates and provide crucial support for decision-making in the development planning of the South Geisum oilfield.