Offshore Technology Conference

Technical Session - Taking a Deeper Look at the Offshore Industry

Arup presents: Design and Installation of the Malampaya Depletion Compression Platform - Paper #27302

Brian Raine, Arup Energy

uesday 3rd May 2016

10:30 - 11:00

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Taking a Deeper Look at the Offshore Industry

For more information visit: http://2016.otcnet.org/Content/Join-us-for-OTC-2016

Come join us at OTC 2016!

We invite you to join Brian on Tuesday May 3rd at OTC 2016 at 10:30 during the session 'Taking a Deeper Look at the Offshore Industry'

Brian Raine has prepared a paper on the Malampaya Depletion Compression Platform which has been selected for presentation during OTC 2016. The paper describes the design and installation of the platform inspite of the unusual ground conditions.

Arup - Malampaya

The Depletion Compression Platform (DCP) was concieved by Shell Philippines Exploration B.V (SPEX) to provide additional gas compression to account for the future expected decrease in well pressure from Malampaya field. The Malampaya project is very important to the ongoing prosperity of the Philippines, with the exported gas feeding three power stations which have a combined output providing up to 45% of the power needs of Luzon, the largest and most populous island in the Philippines.

The DCP consists of a sealed barge structure which is rigidly connected to four cylindrical legs, each of which is supported on individiual strut-linked hexagonal pad footings. The DCP arrangement used cylindrical rather than truss legs and the base comprised a series of linked pad footings rather then a skirted baseplate. The leg configuration was selected in an attepmt to simplify the leg fabrication; whilst the use of pad footings was a result of the site geotechnial conditions.

Installation of the DCP commenced after the arrival at the Malampaya site following the wet tow from Subic Bay. On the morning of 12 February 2015 base lowering commenced with touchdown occurring on the seabed some 26 hours later. Barge raising commenced immediately thereafter with the barge clearing the water around midday on 13 February 2015. Barge raising to the required elevation was completed in the early hours of 14 February 2015, a total of less than 2 days.

The presentation will describe the unusual ground conditions, innovative geotechnical and structural design undertaken, offshore work performed during both seabed preperation and DCP installation to ensure a successful outcome to the project.