Abstract
In 2003, the Company in Oman, produced 700,000 bbl/day net oil and 4,000,000 bbl/day water from a large number of widely geographically spread mature fields. The produced fluids in the gathering system are becoming more aggressive resulting in high corrosion rates of carbon steel flowlines. In order to manage flowline corrosion, the Company has long had the leading edge in the Arabian Gulf Region in the application of a range of non-metallic pipe materials. Glass Reinforced Epoxy (GRE) pipe and polyethylene (PE) liners are widely applied and products such as reelable Reinforced Thermoplastic Pipe (RTP) and spoolable GRE have been developed, qualified, trialed and are now being applied. This paper describes the operating envelopes as applied by the Company of the various materials used and discusses the minimum life-cycle cost based materials selection strategy developed by the Company for the gathering systems.