Subsea gas compression - A future option

Bjerkreim, Bernt

doi:10.4043/16561-ms

Cited by 5 publications

(1 citation statement)

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“…Similarly, the technical gaps for power distribution is summarised in Table 3. [2]) and similar programmes are essential, where there are plans to bring the subsystems or complete systems ready for prototype testing. The challenge is to get the different systems ready to be put together in an integrated process under water.…”

Section: Technical Maturity and Qualificationmentioning

confidence: 99%

Subsea Gas Compression - Challenges and Solutions

Fantoft¹

2005

Offshore Technology Conference

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractProduction of gas from remote offshore areas requires cost efficient solutions for boosting of the well-stream to maintain satisfactory flow rates throughout the field lifetime. As a result of emerging subsea processing technology, subsea gas compression has matured as a field development building block. The potential benefit of this technology is that it can eliminate the need for surface production facilities and facilitate production from r eservoirs otherwise not seen economically attractive.Development of subsea gas compression solutions is associated with substantial technical challenges. Several key components are well known from surface applications but need to be designed differently to meet the special subsea requirements.Special attention is needed for the design of the compressor and motor unit, control and power distribution system, as well as other process equipment such as for separation, cooling and pumping. All these elements are needed to successfully exploit the full benefits of subsea gas compression.This paper addresses some of the technical challenges associated with subsea gas compression and presents R&D focus for closing the technical gaps.

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Section: Technical Maturity and Qualificationmentioning

confidence: 99%

Subsea Gas Compression - Challenges and Solutions

Fantoft¹

2005

Offshore Technology Conference

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Natural convection heat transfer from three vertically arranged horizontal cylinders with dissimilar separation distance at moderately high Rayleigh numbers

Grafsrønningen

Jensen

2013

International Journal of Heat and Mass Transfer

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The Deployment of the World's First Subsea Multiphase Compression System - Enabling Increased Recovery

Hjelmeland¹,

Torkildsen²

2016

Day 3 Thu, March 24, 2016

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Subsea multiphase boosting and metering represent technologies which have been proven to provide increased recovery factors from subsea fields, and improved field development economics of projects. The experience from successful operation of subsea multiphase boosting system on a global scale has driven the next technology step - subsea multiphase compression. This paper describes the development, qualification and delivery of the world's first subsea multiphase gas compression system. The development and qualification of the world's first subsea multiphase compressor system with no requirements for an upstream separation facility or an anti- surge system will be described. The compressor is a contra- rotating machine specifically designed for pressure boosting of unprocessed well stream. This unique configuration, developed in collaboration with several oil companies, allows for a compact and robust design that is easy to install by use of light intervention vessels, and is based on the well- proven design developed for subsea booster pumps. The multiphase compressor is capable of handling high liquid contents without mechanical issues, with gas volume fractions typically in the range of 95%-100%. The application of a multiphase compressor in a subsea environment simplifies a subsea compression system significantly as there is no need for preprocessing. This enables deployment of simplified subsea systems at lower capital expenditure and field development costs. Another feature of the subsea multiphase compression system that will be described is the development of a high performance subsea process cooler. The cooler design is based on free convection to fulfill the design requirements to have a simple and robust system, as the cooler module is installed in a location with limited access for inspection, maintenance and repair. The main driver in the development of the multiphase compressor was to increase recovery rates in subsea gas fields. The Gullfaks field, operated by Statoil, located in the North Sea, sees the first deployment in the world for subsea multiphase compression. Currently the recovery rate for Gullfaks South Brent is at 62%; however, it is foreseen that the recovery rate will increase to 74%, or by 22 million barrels of oil equivalent, by using the multiphase compression system and combined with low pressure production.

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Subsea gas compression - A future option

Cited by 5 publications

References 0 publications

Subsea Gas Compression - Challenges and Solutions

Subsea Gas Compression - Challenges and Solutions

Natural convection heat transfer from three vertically arranged horizontal cylinders with dissimilar separation distance at moderately high Rayleigh numbers

The Deployment of the World's First Subsea Multiphase Compression System - Enabling Increased Recovery

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