3D Petrophysical Model for Mansouriya Gas Field/Jeribe Formation by using Petrel

Abstract

Mansuriya Gas field is an elongated anticlinal structure aligned from NW to SE about 25km long and 5-6 km wide. The Jeribe formation considered the main reservoir, contains gascondensate fluid, has a uniform thickness about 60 m. The reservoir is significantly overpressured.In this study, the 3D geological model for Jeribe Formation in Mansuriya Gas Field is setupby using Petrel. Jeribe Formation represents the most important reservoir in MansuriyaGas Field. Four vertical wells (Mn-1, Mn-2, Mn-3 and Mn-4) were drilled in MansuriyaGas Field and used to set-up water saturation and porosity models represented by a 3Dstatic geological model in three dimensions. The main reservoir, Jeribe Formationcarbonate, is subdivided into 8 zones namely J1 to J8, according mainly to porosity log(RHOB and NPHI) trend, DT trend and saturation trend. Petrophysical model (porosity andwater saturation) for Jeribe Formation was set-up from values of porosity and watersaturation using Sequential Gaussian Simulation algorithm. According to data analyses andthe results from modeling the units (J1, J3, J4, J5, J6 and J8) are considered as high-qualityreservoir units due to the high PHIE, low water saturation and no shale content. Units (J2and J7) are considered as non-pay units because of very high-water saturation. Crosssections of petrophysical model were conducted to show the vertical and horizontaldistribution of porosity and water saturation between wells in the field.