Subsea Compression – Project Overview

Vinterstø, Torstein; Birkeland, Bjørn; Ramberg, Rune Mode; Davies, Simon; Hedne, Pål Eirik

doi:10.4043/27172-ms

Cited by 5 publications

(1 citation statement)

References 5 publications

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“…TheÅsgard subsea compression system in Norway 33 inspires the case study, where two protection systems (process control and safety) exist independently of each other. The integration of process control & safety concept is a novel technology applied as an alternative solution to reduce the complexity of the physical architecture 9,34 .…”

Section: Case Studymentioning

confidence: 99%

A comparison of hazard analysis methods capability for safety requirements generation

Zikrullah

Kim

Meulen

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part O:

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A safety-critical system comprising several interacting and software-intensive systems must be carefully analyzed to detect whether new functional requirements are needed to ensure safety. This involves an analysis of the systemic properties of the system, which addresses the effect of the interaction between systems and system parts. The paper compares two hazard analysis methods, which are often considered well-suited for such software-intensive systems: the Functional Hazard Analysis (FHA) and Systems-Theoretic Process Analysis (STPA). The focus is on the selection and improvement of the best methods, based on the lesson learned from the comparison of FHA and STPA. The analyses cover the hazard analysis processes, systemic properties, and the criteria of requirements. The paper concludes that STPA is the better choice over FHA. Insights are obtained to align both STPA and FHA methods with the broader topic on risk management, that is, hazard analysis method improvement, cautionary thinking, uncertainty management, and resilience management.

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Section: Case Studymentioning

confidence: 99%

A comparison of hazard analysis methods capability for safety requirements generation

Zikrullah

Kim

Meulen

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part O:

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Water Dew-Pointing with Subsea Gas Dehydration to Improve Pipeline and Flow Assurance Economics

Yeaw¹,

Gyllenhammar²

2016

All Days

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A prolonged period of relatively low oil prices has resulted in an industry-wide push to utilise field development technologies that provide better returns on investment. For deepwater and long distance tieback developments, both pipeline and flow assurance related expenses constitute the major components of both CAPEX and OPEX figures for the development. This paper presents how subsea dehydration technology could be used as a novel solution to reduce development costs by solving pipeline issues related to multiphase flow. It also outlines the two potential application scenarios for subsea dehydration, with Specific focus on the hybrid topsides-subsea development scenario. Key features of the subsea dehydration system are provided, with descriptions of the main subsea technology components.

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Novel Pseudo Dry Gas System for Extended Subsea Tie-Backs

Rafty

Thomas

Liebana

et al. 2019

Day 1 Tue, March 26, 2019

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The ‘Pseudo’ Dry Gas (PDG) subsea concept is being developed to dramatically improve the efficiency of subsea gas transportation by removing fluids at the earliest point of accumulation. The technology will increase the geographical reach from receiving gas terminals, allowing asset owners to prolong production life without the need for more expensive design solutions. This paper will provide an overview of the innovative technology, demonstrating that a 200 km plus tie back can be achieved, without compression. Increasing the distance of subsea tie-backs increases the liquid inventory, with constraints on pipeline diameter for slug free flow. The PDG concept is based on a main gas line integrated with piggable gravity powered drain liquid removal unit and pumps (a smaller fluid line transports separated liquid). Multiple units are specified to drain liquids as they condense in the line, maintaining near dry service. Liquid free operation removes the constraint on pipeline diameter. Specification of a large diameter pipe (within installation limits) reduces backpressure on the wells, enhancing recovery. Minimum stable flow limits are removed, improving tail end recovery. Current stranded gas development options (subsea compression, floating facilities, FLNG) generate a step change in costs which can make a project uneconomic. This is even more acute in mature and semi-mature basins where existing gas processing facilities / LNG terminals already exist offshore or onshore along with sunk costs from the exploration. A case study for a 185 km pseudo dry gas subsea tie-back to shore demonstrates the PDG concept feasibility. This result is used to argue that the PDG concept should be included in the suite of subsea processing options considered by Operators in early field development planning.

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Subsea Compression – Project Overview

Cited by 5 publications

References 5 publications

A comparison of hazard analysis methods capability for safety requirements generation

A comparison of hazard analysis methods capability for safety requirements generation

Water Dew-Pointing with Subsea Gas Dehydration to Improve Pipeline and Flow Assurance Economics

Novel Pseudo Dry Gas System for Extended Subsea Tie-Backs

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