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 25
km long and 5-6 km wide. The Jeribe formation considered the main reservoir, contains gas
condensate 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 setup
by using Petrel. Jeribe Formation represents the most important reservoir in Mansuriya
Gas Field. Four vertical wells (Mn-1, Mn-2, Mn-3 and Mn-4) were drilled in Mansuriya
Gas Field and used to set-up water saturation and porosity models represented by a 3D
static geological model in three dimensions. The main reservoir, Jeribe Formation
carbonate, 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 and
water saturation) for Jeribe Formation was set-up from values of porosity and water
saturation using Sequential Gaussian Simulation algorithm. According to data analyses and
the results from modeling the units (J1, J3, J4, J5, J6 and J8) are considered as high-quality
reservoir units due to the high PHIE, low water saturation and no shale content. Units (J2
and J7) are considered as non-pay units because of very high-water saturation. Cross
sections of petrophysical model were conducted to show the vertical and horizontal
distribution of porosity and water saturation between wells in the field.