Abstract

This paper deals with facilities planning for Esso Production Malaysia Inc's (EPMI's) Semangkok oil field and is supplementary to the Semangkok Field Development Planning paper presented at this conference. The original plan was to develop the field with three platforms but further studies indicated that two platforms would reach all reserves utilizing higher angle wells. The production facilities include a manned central processing platform, Semangkok A, with gas re-injection facilities and an processing platform, Semangkok A, with gas re-injection facilities and an unmanned satellite platform, Semangkok B. Remote operation of the unmanned satellite platform is accomplished by a telemetry system operated from the central platform. Crude production is pumped to the onshore Trengganu Crude Oil Terminal (TCOT) via a pumping platform. Development planning had to consider the high CO2 content of Semongkok gas which required careful selection of materials in the facilities design.

Introduction

The location of Semongkok field relative to other EPMI fields in offshore Peninsular Malaysia is shown in Figure 1. Semangkok field is 87 km from Peninsular Malaysia is shown in Figure 1. Semangkok field is 87 km from the Tap is pumping platform which in turn is approximately 200 km from the onshore Trengganu Crude Oil Terminal (TCOT) near Kerteh.

The Semangkok field crude reserves will be recovered from the Group E sandstones with average depths ranging from 1000 m to 1200 m. Oil accumulation is of a rim-type which is underlain by water and overlain by gas. Although the aquifer strength varies from weak to moderate no water injection is required to maintain the reservoir pressure. Produced gas will be reinjected for purposes of reservoir pressure maintenance. Compression design capacity is 1 × 10 degrees std. m3 per day.

Field optimization studies have reduced the development of Semongkok field to two production platforms - namely Semangkok A, which is manned and to be a central processing platform and Semongkok B, which is unmanned and to be a minimum facility satellite platform.

Semangkok A platform is on eight-legged, five-module platform with 24 well-slots and is located in 64 m of water. The jacket and deck modules were installed in July 1983. Gas compression facilities will be installed in April 1984 when drilling is in progress and production has commenced. Semangkok B is a four-legged platform containing two modules and having 18 well-slots. The modules were installed in September 1983.

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