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- W2082942016 abstract "Abstract The Kuito field, discovered in April 1997, lies offshore Cabinda Province in Angola's deep-water Block 14, a 1,560-square-mile concession. Kuito was Angola's first deep-water oil field to come on stream in December 1999, two and a half years after discovery. Kuito oil is produced via an FPSO chartered through SBM of Monaco and Sonangol on behalf of operator ChevronTexaco. Kuito is a heavy oil ranging from 18 – 22 API. The FPSO presently has two oil production trains with a maximum throughput of 100,000 bbls. oil per day. Three phase, horizontal, gravity separation vessels are used to separate oil and gas from unwanted produced water and solids prior to transportation. Kuito production separators were designed with traditional, single point transmitters for interface and bulk level measurement. These level transmitters were capacitance type instruments mounted inside the vessels in stilling wells. Following production start-up, separation problems began to emerge, these were manifested in numerous process upsets and shutdowns. Kuito oil can form emulsions quickly and calcium naphthenate, or ‘Kuito Gunk’ as it is referred to on the FPSO, is produced at higher temperatures and if allowed to cool solidifies. The point instrumentation was unable to detect these emulsion and naphthenate layers resulting in the instrumentation becoming fouled and ceasing to function. The separators were operated ‘blind’, utilising tri-cocks located on the side of the vessel and as the instrumentation was installed in stilling wells inside the vessel it was impossible to maintain them without shutting down and depressurising the vessels. This paper describes how nucleonic profiling instruments were retro-fitted to the vessels and shows, with the aid of real time on line screen shots how operations were able to identify the different layers within the separators. This enabled oil production uptime to be increased and chemicals, emulsion breakers and defoamers, to be pro-actively dosed before the plant became unstable." @default.
- W2082942016 created "2016-06-24" @default.
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- W2082942016 date "2004-10-10" @default.
- W2082942016 modified "2023-09-27" @default.
- W2082942016 title "Separator Profiling: Kuito FPSO Case Study" @default.
- W2082942016 doi "https://doi.org/10.2118/88647-ms" @default.
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