Integrated Formation Evaluation of South Annajma Field, Muglad Basin,Sudan

Abstract

In petroleum engineering and, formation Evaluation is used to determine the ability of borehole to produce petroleum. Essentially, it is the process of 'recognizing a commercial well when you drill one. The most common petrophysical exercises used in evaluating reservoirs and assessing reserves are log analysis, core measurements. In this research the special core analysis (SCAL) and well logging data was used to evaluate Bentiu Formation from Muglad Basin in Sudan which is shelly sand reservoirs. A prelude of this research was containing introduction ,and then the well logging data (from three wells (south Annajma 3, south Annajma 7, south Annajma 17 ) used to calculate the petrophysical properties by using Interactive Petrophysics "IP" and then compared with relative permeability and capillary pressure analysis from core samples data. The calculated petrophysical properties include porosity, Volume of shale, and water saturation, and core analysis data include porosity, water saturation, residual oil saturation ,water permeability at residual oil saturation, oil permeability at initial water saturation and transition zone height . Capillary pressure analyses confirm that the production from these formations will be two phase (Oil + Water) from the beginning of the production.