Installation of a Submerged Buoy for Supporting Risers (BSR) System in Campos Basin Site

́jo, Jairo Bastos de Arau; Almeida, Jose ́ Carlos Lima de; Fernandes, Antonio Carlos

doi:10.1115/omae2011-50167

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“… The artificial seabed is designed in the same way as an anchored submerged buoy of the hybrid riser system, such as Tension Leg Riser (TLR) [12], Grouped SLOR [13]. The feasibility of the hybrid riser system has been proved by the trial well tests.…”

Section: Reality Versus Unknownsmentioning

confidence: 99%

New risk control mechanism for innovative deepwater artificial seabed system through online risk monitoring system

Zhen

Vinnem

Han

et al. 2020

Applied Ocean Research

View full text Add to dashboard Cite

The current offshore field development concepts (dry tree or subsea tree) have limitations for petroleum production in ultra-deep water (more than 1500 m), where the challenges are characterized by the depth of water, remoteness and harsh environmental conditions. A new alternative offshore field development solution, termed as Deepwater Artificial Seabed (DAS) system, is proposed. The new DAS system offers improved technical and commercial performance, higher levels of safety, reduced interface complexity and improved development flexibility for field development in deep and ultra-deep water. Central to the evaluation and application of the new DAS system is the inherent risk relative to the acceptance level. Hence, barriers in the new DAS system are established and maintained to prevent, control or mitigate undesired events or accidents. This paper investigates a new risk control mechanism for the innovative DAS system in accordance with the online risk monitoring and decision support principle. Firstly, main characteristics and design principle of the DAS system are presented. On this basis, the main hazards for the DAS system are identified, which includes well incident/ loss of well control, mooring system failure, ballast system failure, leak from riser, flexible jumper and subsea production facilities, and damage to riser, flexible jumper and subsea production facilities. The risk level of the identified hazards related to offshore petroleum systems already in use is analyzed and presented by the results from the risk assessment for the Norwegian Continental Shelf (NCS) in the period of 2008-2017. It has been demonstrated that the risk associated with the key sub-systems including the ballast system, mooring system, well system and external impact protection system is at a level that calls for further risk reduction. This is followed by the barrier management principles as well as a discussion of existing and potential barriers in the DAS system. Improved barrier functions in the key sub-systems are analyzed systematically and proposals for alternative barrier functions are suggested based on the online risk modelling and decision support principle. Further, a case study in regard to the DAS mooring system failure event is conducted to demonstrate how the new risk control mechanism works. The proposed new risk control mechanism could improve the safety of the DAS system and convince the offshore petroleum industry for application significantly.

show abstract

Section: Reality Versus Unknownsmentioning

confidence: 99%

New risk control mechanism for innovative deepwater artificial seabed system through online risk monitoring system

Zhen

Vinnem

Han

et al. 2020

Applied Ocean Research

View full text Add to dashboard Cite

show abstract

Parametric analysis on the global design of flexible riser under different environmental conditions using OrcaFlex

Amaechi,

Butler,

Beddu

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

The application of flexible risers has led to increased production of fluid contents in the marine industry. This paper presents the design challenges of a flexible riser subjected to internal pressure under deep-water conditions, at a water depth of 2000 m. Parametric variations with extensive dynamic analysis were carried out. The study highlights include the global analysis of lazy-wave configuration for the design of flexible risers, to understand the failure of flexible risers and application of hybrid configurations on flexible pipes. For the global analysis, the design of the riser was modelled in OrcaFlex by considering different sections and then analysed for the influence of effective tension, bending moment and environmental conditions. This riser model is multi-layered and was mainly subjected to the fluid pressure load and the environmental load. Model validations were performed with existing lazy-wave models. In the global design, the riser was assessed when connected to the vessel, but vessel motion was not included, additionally, three different environmental conditions were applied on the model. Also, the suitability of the adopted configuration for the proposed flexible riser was adopted considering it as a sustainable marine structure. Stress profile, tension profile and bending moment for the risers were presented and conclusions were made on the study. Some fatigue study is recommended in future study to be undertaken on the riser.

show abstract

Installation of a Submerged Buoy for Supporting Risers (BSR) System in Campos Basin Site

Cited by 2 publications

References 0 publications

New risk control mechanism for innovative deepwater artificial seabed system through online risk monitoring system

New risk control mechanism for innovative deepwater artificial seabed system through online risk monitoring system

Parametric analysis on the global design of flexible riser under different environmental conditions using OrcaFlex

Contact Info

Product

Resources

About