EVALUATION OF WATER ALTERNATING GAS INJECTION PILOT IN ZONE 19 IN HASSI MESSAOUD FIELD IN ALGERIA

Abstract

This thesis is about the application of the Water Alternating Gas (WAG) technique pilot in Hassi Messaoud field in zone 19. It’s an effective technique that has been successfully applied in May 2005 to maintain or increase the production oil rate and decrease the amount of gasflood simultaneously. This study is focused on the efficiency of this technique which did not show any definitive evidence for its success. Moreover, between May 2005 and April 2010 the monthly gasflood injection in zone 19 has decreased by 56%, while the oil production rate had a slight rising by 6 M scm. However, the new technologies of the WAG technique used all around the world are discussed using Prosper software to propose the most applicable one that will enhance the residual oil recovery in the mentioned zone