Feasibility Study to Implement Steam Assisted Gravity Drainage (SAGD) For Fula North East (FNE) Sudanese Oil Field

Abstract

When the oil recovery comes to its lower level at which production of oil in economical amount not possible; the need for tertiary methods will be necessary. Steam Assisted Gravity Drainage (SAGD) one of the thermal enhanced oil recovery methods it increase the recovery by using horizontal wells; one for continued steam injection and the other for continued production. This method frequently is used when the oil has very high viscosity and low API degree. SAGD method depend on many factors; such as steam quality " for viscosity reduction", the horizontal wells to cover a large space for recovery as much as possible and the gravity to facilitate oil moving from injection well to production one. Fula North East Sudanese oil field is selected as case study, the study proposed to investigate the SAGD method it can be used to increase the recovery in FNE oil field, which revealed low recovery rate. Using simulator (CMG-STARS) to estimate various values for certain factors such as steam quality, temperature and injection rate, then predict the results for five years starting from 1st Jan 2015. The simulation model of SAGD has shown a promising implantation where a successful result is achieved in the FNE field, so that provide opportunities for more studies about other fields, if it has desired geological data are given for the future.