3D petroleum reservoir modelling using seismic and well-log data to assess hydrocarbon potential in Abu Roash (G) Member, Karama Oil Field, North-Western Desert, Egypt

Since 2002, the Upper Cretaceous Abu Roash (G) Member in the Karama Oil Field has been considered to be one of the most important reservoirs in the Abu Gharadig Basin in the North-Western Desert. This member is located in the Karama Oil Field. For the purpose of increasing oil production, a three-dimensional reservoir model was developed, and the area's oil resource was determined by employing thirty two-dimensional seismic lines dispersed in the north-south and east-west directions, in addition to five well logs. Within the Abu Roash Formation, which conformably overlies the Bahariya Formation and unconformably underlies the Khoman Formation, there are seven normal faults that allow for three-way dip closure for oil accumulation. These faults cut through the Abu Roash Formation. The Abu Roash (G) Member is mostly composed of limestone, shale and intercalated siltstone and sandstone, and it ranges in thickness from 54 to 168 feet (16.5 to 51.2 m) in terms of its net pay. Effective porosity ranges anywhere from 20% to 30%, shale content can be anywhere from 13% to 24%, water saturation can be anywhere from 40% to 55% and hydrocarbon saturation can be as high as 60%. Through the integration of the constructed structural and property models, two new prospect areas have been presented (in the northern part of the study area). In these areas, the petrophysical parameters are good, and the Original oil in place (OOIP) is predicted to be 1107 x 106 Stock Tank Barrels (STB), which will help with the development plans for the study area.

Automated summary

This study focuses on the Upper Cretaceous Abu Roash (G) Member in the Karama Oil Field and highlights its importance as a reservoir in the Abu Gharadig Basin. Through the development of a three-dimensional reservoir model and the analysis of seismic lines and well logs, the characteristics and properties of this member have been determined. The study reveals multiple normal faults that contribute to the accumulation of oil and identifies two new prospect areas with good petrophysical parameters. The estimated Original oil in place (OOIP) is significant, making it crucial for future development plans in the area.