GEOLOGICAL STUDY OF THE EXTENSION OF THE BENKAHLA AREA: THE GEOLOGICAL MODEL OF THE DEPOSIT

Abstract

Benkahla’s reservoir is located in the depression of the Wade Myawhich is the center of the Triassic province, situated south-eastern Berkaoui’s reservoir. The sedimentary structure consists of deepunderground clay Silurian.The trap is structural joint. The rock cover is provided at the regional level by the thick evaporate sequence of Triassic salifère S4 and S3 to S1 Lias levels. Clays intercalated between the Triassic reservoirs maylocally constitute blankets.The region of Benkahala is a large reservoir of Ouargla region, having been the subject of exploitation for years; recent studies show the presence of several reservoirs to the south of Benkahala’s field. Several prospecting was done with the objective of assessing the reserves The purpose of this research is to provide a three-dimensional image of the underlying geological formations, in this case the reservoir rock. Reservoirs geological model is constructed using Petrel software by integrating all available data; or data obtained by direct petrophysical methods or interpretation of the logging logs (clay volume, porosity, saturation, reservoir thickness ……). It includes the following elements:  The implementation of geological maps and petro-physical evaluation for TAGI reservoir.  To build a structural model of the study area.  Build the geological model of the area.  Calculate amount of in place oil. The superposition of available data shows that point for the development of the field.