Abstract
Summary The Mars installation consists of a four-block unit with a tension leg platform (TLP) installed in Mississippi Canyon Block 807. The discovery well was drilled in 1989. Development studies were conducted from 1990 through 1992 with project-fabrication funding occurring in the fall of 1993. A 24-well dual-casing-riser TLP in 2,933 ft of water was approved. The facility was designed originally to process 100,000 B/D oil and 110 MMscf/D gas. Maximum individual well rates were estimated at 11,000 B/D oil. During the fabrication phase of the project in 1995, it became clear that completion technology advances had increased individual well production potential far beyond the 11,000-B/D-oil benchmark, and the ultimate TLP production potential would exceed the topsides nameplate capacity. A study was undertaken to debottleneck the topsides to handle unconstrained production rates. The study evaluated all phases of the production facility impacted by increased production. This paper presents evaluated phases of the production facility debottleneck, summarizes modifications to the facilities at the TLP integration site, and reviews the use of several new and innovative technologies. Facilities systems debottlenecked included high-rate production flowlines, oil treating, compression units, dry-oil sales pumps, utility, flare, and gas dehydration.
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