www.optimusaberdeen.com T+44 (0)1224 264500 BP ETAP – ALQ review Background The ETAP platform is an integrated development of nine oil and gas reservoirs, with six fields operated by BP and three operated by Shell/Esso. In order to maintain current and future performance on the Eastern Trough Area Project (ETAP), the number of personnel on board (POB) had to be increased from 117 to 160. Accommodation structures and architectural layout are one of Optimus’ areas of specialist knowledge, with experience gained from FEED to detail design and offshore implementation through working with various operators and fabricators. Review process BP commissioned an assessment of the available options for creating additional living quarters (ALQ) with a base case increase of 40 POB. BP then commissioned Optimus to carry out a review of the assessment and identify areas where further study could increase the knowledge required to allow the project to progress. As part of the review, Optimus looked at a comparison between the installation of a single structure using an HLV and the installation of a modular structure using the platform crane. Optimus also considered options for installing an ALQ for both 30 and 20 POB if 40 POB was deemed infeasible. On completion of the review, BP requested that Optimus carry out further work to develop a more detailed structural and architectural weight. To provide BP with this information, Optimus developed a conceptual design of the ALQ structure and associated requirements. A preliminary weight estimate was calculated as 480 tonnes.