Enhancing the Injection Profile in Rahama Field - First Time in Egypt

Abstract

Water Injection is considered to be one of the most important ways to enhance oil recovery. Although all of the Injector wells in Rahma field in Egypt were stimulated before using hydraulic fracturing however, they were still suffering from severe decrease in the injection rates which are far below the target. As a first time to be done for Qarun Petroleum Company (QPC), a full technical study has been done to the field in order to identify the main reason for the severe decrease in the injection profile which was formation damage and high increase in the skin value. Based on the study done, a technical treatment was designed and Matrix Stimulation Engineering was implemented to the well Rahma-12 as the first candidate for Matrix Stimulation. The results were successful, the injection rate increased in the well Rahma −12 from 280 bwpd to 3000 bwpd and in the well Rahma-10 from 300 bwpd to 2800 bwpd. These successful results encouraged QPC to implement the Matrix Stimulation treatment in all the injector wells in the Rahma field which resulted in great enhancement to the injection profile in the field. This paper discusses the full technical study done to the field and the chemical tests done in the lab in order to design the best treatment to the formation. It shares the experience gained during the execution phase and new best practices that were implemented first time which resulted in a great success. Finally it provides a useful data base for the field and the Matrix Stimulation Operations which were done first time in QPC fields.