Greater Bongkot South (GBS) is a gas and condensate field located about 200km east of Songkhla in the Gulf of Thailand. The field is operated by PTT Exploration and Production (PTTEP), which has a stake of 44.45%. Other partners in the field include BG Group with a 22.22% stake and Total, with a stake of 33.33%.
The field started production in April 2012. The initial production was 14,000 barrels of oil equivalent a day. The field has a processing capacity of 350 million cubic feet of gas and 15,000 barrels of condensate per day.
Greater Bongkot South field development
The Greater Bongkot South (GBS) field is situated 700km away from the existing Bongkot North development. The GBS field is located within blocks B16 and B17 in the Gulf of Thailand.
The development of the field began in 2004 with a feasibility study conducted by PTTEP and Bongkot joint venture partners. The construction at the field began after four years. The test run on the processing facility was completed in March 2012.
GBS gas and condensate field facilities
The facilities at GBS field mainly comprise of four structures, which include the Wellhead Platform South (WPS), the Flare Platform South (FPS), Quarter Platform South (QPS) and the Processing Platform South (PPS).
The Processing Platform South (PPS) at the Greater Bongkot South field has a capacity of about 350 million cubic feet of gas and 15,000 barrels of condensate a day. The gas from the field is exported to the PTT grid via a newly built spur line. The condensate is exported to the existing floating, storage and offloading (FSO) vessel at the Greater Bongkot North field, located about 80km away in the north.
The three decks of the processing platform include the upper, the main or mezzanine, and the lower or emergency shutdown valve (ESDV) decks. The equipment on the upper deck includes a production separation, CO2 removal and gas compressor units. It has power generators and a heating medium system.
The main deck features equipment for gas metering and export, and a membrane pre-treatment unit. It also has a condensate stabiliser unit, a switch gear room and instrument technical room, and a condensate separation unit.
The lower deck at the platform consists of gas pipeline risers, receiving system remote wellhead platforms, and utilities. The equipment also includes a fire water system, a condensate stabiliser unit, a dehydration unit, a mercury removal unit and a gas export pipeline.
The Quarter Platform South serves as living quarters for accommodating about 160 offshore workers. The platform also has a central control and communications centre. The Flare Platform South (FPS) consists of high pressure flare, low pressure flare and permeate flare devices.
The Wellhead Platform South is a production platform around the central processing platform. The field currently has six well head platforms, including one wellhead platform at central complex and five remote wellhead platforms.
Contractors involved with the Gulf of Thailand-based field
Hyundai Heavy Industries (HHI) was awarded with a turnkey contract in October 2008, for the engineering, procurement, installation and construction of gas process platform, jacket, flare tower and three bridges.
The construction of the processing platform was completed at HHI facility in Ulsan, South Korea. The processing platforms were transported and installed at the field in August 2011.
The construction of the quarter platform was constructed at PT Gunanusa’s facility in Indonesia. The platform was transported to the Gulf of Thailand in July 2011.
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