Success Story to Implement Well Operation and Operational Excellence By Maintaining Well Integrity and Production Optimization in Offshore Field

Abstract

This paper describes the method to keep wells in operation according to industrial code and Well Integrity Management System (WIMS), in order to continue supporting gas supply and demand in the field,. It includes identifying tubing/ annulus communication, mitigating excessive annulus pressure, and corrective action against tubing casing leaks. In one of the wells in the field a leak was found between the production tubing and production casing (“A” annulus) and no excessive pressure from “B” & “C” annulus. There was no way to shut-in the well due to the field’s contribution to gas supply and demand. The well had to be operated safely by conducting annulus pressure monitoring, pressure limit calculation, regular bleed-off program, and modifying surface facilities. We provided technical recommendations, specified mitigating engineering solutions to reduce risks, and changed surface facilities to keep wells in operation. Based on job results, we operated “W” well safely with efficient technology, delivered fluid from 3 ½” production tubing to surface facilities, performed cost optimization, and minimized production loss. Furthermore, in this particular case no serious hazards occurred in offshore field conditions. The paper shares a well integrity implementation success story, methods, and detailed procedures to keep wells in operation in the offshore field by maintaining annulus casing pressure. We have done this method by efficient technology/ solution, with lower operating and construction costs, and with no production loss during operation.