عنوان مقاله [English]
In the present study, a geostatistic model of the Asmari reservoir based on petrographic, geophysical, and petrophysical data of 90 drilled wells in Mansuri oil field is prepared by using reservoir modeling system (RMS) software. Based on the petrophysical data and their correlation with thin sections, the Asmari reservoir in Mansuri oil field is mainly carbonate-sandstone and subdivided into 8 zones. Zone 1 is at top, below the cap rock, and zone 8 (deepest zone) overlies Pabdeh formation. Between these zones, the upper zones are less affected by destructive diagenetic processes and have a good reservoir quality. Based on geophysical data, the Mansuri oil field has not been affected by tectonic activities as seen on the underground contour map. Moreover, a statistical reservoir model correlating petrographic, petrophysical, and geophysical data was prepared. The results indicate that zones 1-3 of Asmari formation are only productive, among which zone 2 is the best reservoir zone with 65% oil in place. This can be deduced by using petrophysical properties distribution (such as porosity, water saturation, and net to gross ratio) in the oil field. Fractures density contour map shows that, in the Mansuri oil field, fractures does not affect the reservoir to increase the qualities. The reservoir quality is better in the east-north east of Mansuri oil field based on porosity and water saturation contour maps. Thus one can focus on these areas for well planning, production control, and enhanced recovery in the future.