Multiphase Pump Implementation at Tembungo-B platform for Petronas Carigali Sabah Operation (SBO), Malaysia (Sharing Best Practices)
- Sharifah Nor A'shikin (Petronas Carigali Sdn Bhd) | Royan Rakam (Petronas Carigali Sdn Bhd)
- Document ID
- Society of Petroleum Engineers
- Abu Dhabi International Petroleum Exhibition and Conference, 3-6 November, Abu Dhabi, UAE
- Publication Date
- Document Type
- Conference Paper
- 2008. Society of Petroleum Engineers
- 4.1.5 Processing Equipment, 4.2 Pipelines, Flowlines and Risers, 4.5.5 Installation Equipment and Techniques, 4.3 Flow Assurance, 4.1.2 Separation and Treating
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Tembungo-B (TBG-B), an unmanned platform of Tembungo field, is located in the northern part of East Malaysia, about 80km north west of Kota Kinabalu This platform was designed as unmanned platform which uses natural flow to transport the oil from all wells to the main platform, Tembungo-A. It contributes to more than 80% of overall Tembungo field production where, the reserves mainly consist of low pressure (LP) wells. However, the decrease in production was observed over time due to the backpressure imposed on the LP wells. The LP wells flow intermittently and when the trunkline pressure exceeds the flow tubing head pressures (FTHP), these wells quit. Multiphase pumping technology, being the first implementation in Malaysia at offshore installation, has been installed at TBG-B as a mitigation measure to help these wells
Multiphase pumping technology is capable of handling multiphase crude oil, which in the form of liquid and gas, without going through separation. The technology has benefited the production processes as TBG-B is transporting the crude using natural flow from wells directly to the receiving trunkline. This eliminates the need of having separation equipments to cater for the separation processes of gas and liquid which further reduce the capital and operating expenses cost in oil production.
This paper discusses the overview of multiphase pumping technology and the gain in oil production after the implementation of the technology at the field.
Tembungo-B field is fully operated by Petronas Carigali Sabah and has been producing since 1993. The decrease of production by low pressure wells due to high differential pressure between the low and high pressure wells has triggered the decision to opt multiphase pumping technology at the field. Separation processes are not available at Tembungo-B as initially all wells are capable of being transferred using natural flow to Tembungo-A for separation processes. Study has been made where indicates the multiphase pump is capable of ensuring:
1. Flow assurance of low pressure wells.
2. Reduction in backpressure thereby increasing drawdown and production.
3. High pressure wells can be connected to this pump when the flow tubing head pressure starts declining.
To accommodate multiphase pumping technology in order to have continuous production from the LP wells, minor deck extension was done compare to having major deck extension to locate bulky equipments for separation processes. The following figures show the difference between conventional and multiphase pumping technology. Preserverance of environment can be achieved in the new technology as there is no flaring involved in the process of crude transfer. The differences between the installations are simplified in Table 1.
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