Gas field development
The Kasawari gas development project is located in the South China Sea, offshore Sarawak in Malaysia. The project is being developed by Petronas and the first gas from the field is expected to be produced in 2020.
The field is estimated to contain 3.2 trillion cubic feet (tcf) of natural gas resources and is expected to produce 660 million standard cubic feet per day (mmscfd) of gas and 3.5 million barrels of condensate per day.
The project is being developed to meet the National Key Economic Area’s (NKEA) oil, gas and energy (OGE) sector target of 5% annual growth between 2010 and 2020.
The Kasawari gas field is located at a water depth of approximately 108m in block SK316 in Central Luconia Province, Malaysia.
The field is situated approximately 200km away from the coast of Bintulu, Sarawak.
Block SK316 in the Sarawak region also holds the NC3 and NC8 fields.
The Kasawari gas field was discovered by Petronas in November 2011. The block SK316 hosts large scale proven gas discoveries and exploration prospects with comparatively higher levels of carbon dioxide content.
Development of the field involves the usage of advanced technologies to address the issue of high CO2 levels during production.
The Kasawari field development will comprise an 8,600t KSDP-A drilling platform with nine slots, a 47,000t eight-legged central processing platform (KSCPP) and Sarawak riser platform (SKR-D). Other components will include an 85km-long export pipeline connecting to an E11R-A platform, inter-platform bridges linking the CPP to the KSDP-A and flare tripod.
The full well stream (FWS) produced from the drilling wells will be transported to the KSCPP via a 100m bridge-linked piping system. The KSCPP will separate water, condensate and gas, and send back the gas to the drilling platform.
Gas and condensate from the KSCPP will be transported to the SKR-D collector platform via the 80km-long pipeline, before being sent to onshore facilities.
The gas produced will be processed to remove H2S and CO2 and will undergo dehydration offshore before reaching the SKR-D platform.
Wastewater accumulated during the separation process will be treated to an oil content of 30mg/l and released into the sea.
The project is being developed in four phases, including the installation phase, pre-commissioning and commissioning phase, operations phase and project decommissioning.
The pre-commissioning works will include cleaning, gauging and hydro-testing prior to the commissioning of pipelines.
The offshore installation works will include the transportation of materials and components, installation of the platform, flare tripod and bridge-link, and installation of pipeline and hook up to facilities.
During decommissioning, the pipelines are expected to be abandoned in accordance with the guidelines issued by Petronas for the decommissioning of oil and gas installations.
The Kasawari field along with NC3 and NC8 fields will supply gas to the ninth train of the existing MLNG terminal owned by PL9SB, a subsidiary of Petronas.
The ninth LNG liquefaction train is located in the Petronas LNG Complex in Bintulu, Sarawak. Commissioned in 2017, the train has a production capacity of 3.6 million tonnes per annum (mtpa).
Petronas will supply up to 1.2mtpa for a period of 15 years under the LNG sale and purchase agreement signed with Thailand’s PTT Public Company.
MMC Oil & Gas Engineering (MMCOG) was contracted to provide engineering design services for the facilities.
In October 2019, Malaysia Marine and Heavy Engineering Holdings Berhad (MHB) was contracted by PETRONAS Carigali to deliver engineering, procurement, construction, installation and commissioning (EPCIC) services for the project.
White Quest Synergy was contracted to design safety case and performance standards for the Front-End Engineering Design (FEED) project, while Golden Ecosystem was appointed as the EIA consultant to conduct the environmental study.
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