Deepwater Floating Production Systems in Harsh Environment - a Look at a Field Development Offshore Norway and Need for Technology Qualification

2013 ◽  
Author(s):  
Trond Stokka Meling
Keyword(s):  
Production Systems ◽  
Harsh Environment ◽  
Field Development

Offshore Gas Field Development Strategy and Flow Assurance Prediction and Optimization in Harsh Environment

2018 ◽  
Author(s):  
Humoud Almohammad ◽  
Abdullah Al-Derbass ◽  
Abdulaziz Alsubaie ◽  
Mohammed Bumajdad ◽  
Abdulaziz Al-Khamis ◽  
...  
Keyword(s):  
Development Strategy ◽  
Harsh Environment ◽  
Flow Assurance ◽  
Gas Field ◽  
Field Development

Interference of Top Tensioned Risers for Tension Leg Platforms

2017 ◽  
Author(s):  
Hanqing Zhang ◽  
Derek Smith
Keyword(s):  
Production Systems ◽  
Selection Process ◽  
Combined Effects ◽  
Direct Impact ◽  
Interference Analysis ◽  
Field Development ◽  
Strong Current ◽  
Induced Velocity ◽  
Oscillating Motion ◽  
Wave Induced

Dry tree top-tensioned risers (TTRs) are widely used on floating production systems such as TLPs and Spars for drilling, completion, workover and production. The interference between neighboring TTRs is an important consideration which has a direct impact on the total TTR payload budget and the wellbay size for floater sizing and cost. Since the realistic sizing of a floater is essential towards the concept selection process for a field development, TTR interference should be addressed at the early stages of an offshore oilfield development. If the floater is a tension leg platform (TLP) and the field has strong current with associated extreme waves, riser interference may be very challenging and can have direct impact on riser design and the sizing and layout of the TLP. The waves and the oscillating motions of the TLP will have effects on riser interference. The oscillating motion of the TLP can excite the vibrational motion of the risers, and the wave-induced velocity of water particles and the motions of the risers with the movement of the TLP increases the relative flow acting on each riser. The combined effects will increase the deflection of the risers and thus the likelihood of riser interference. The industry has not seen an acceptable interference analysis approach yet which can account for the combined effects of current, waves, and TLP motions. This paper proposes two engineering approaches for the interference analysis of top tensioned risers for tension leg platforms with the combined effects of current, surface waves, and associated floater motions being addressed.

Design Considerations of a Subsea Shuttle Tanker System for Liquid Carbon Dioxide Transportation

2020 ◽  
Author(s):  
Yihan Xing ◽  
Muk Chen Ong ◽  
Tor Hemmingsen ◽  
Kjell Einar Ellingsen ◽  
Lorents Reinås
Keyword(s):  
Carbon Dioxide ◽  
Production Systems ◽  
Electrical Power ◽  
Weather Conditions ◽  
Co2 Injection ◽  
Field Development ◽  
Design Considerations ◽  
Liquid Co2 ◽  
Carbon Dioxide Co2 ◽  
Subsea Pipelines

Abstract Subsea pipelines and umbilicals are used for the transportation of fluids and electrical power between subsea installations and floating production systems (FPUs). The installation and maintenance of these systems can be expensive. In a conventional subsea field development, the produced fluids can be transported from the well to a FPU where they can be offloaded to a tanker (surface ship). In the case of carbon dioxide (CO2) injection into the well, the direction of flow is reversed, i.e., CO2 flows from the tanker to the FPU, down the riser base and through the subsea pipelines to the well. This offloading process is weather-dependent and cannot be performed in severe weather conditions, i.e., strong winds and large waves. This paper presents a novel subsea shuttle tanker system proposed by Equinor ASA designed to be a possible alternative to subsea pipelines, umbilicals and tanker ships. The subsea shuttle is intended to operate submerged under the sea surface to transport liquid CO2 from an existing offshore/land facility where CO2 is captured to a subsea well where the CO2 is injected into the reservoir. As the shuttle is subsea, it can operate under any type of weather conditions. Even though the subsea shuttle is proposed as a vehicle for liquid CO2 transport, it can also transport other types of cargo such as hydrocarbons, injection fluids, electrical power or subsea tools. The paper will discuss the most important design considerations surrounding the subsea shuttle tanker.

Design of Steel Lazy Wave Riser for Disconnectable FPSO in the Gulf of Mexico

2013 ◽  
Author(s):  
Jingyun Cheng ◽  
Peimin Cao
Keyword(s):  
Gulf Of Mexico ◽  
Water Injection ◽  
Integrated Design ◽  
Cost Effective ◽  
Performance Criteria ◽  
Harsh Environment ◽  
Effective Solution ◽  
Field Development ◽  
Integrated Design Approach ◽  
Preferred Solutions

The disconnectable Floating Production Storage and Offloading system (FPSO) is one of the preferred solutions for the deepwater field in the harsh environment and far away from existing pipeline infrastructures. This paper presents a design of steel lazy wave riser (SLWR) system for an internal turret moored disconnectable FPSO in the Gulf of Mexico. The integrated systems of FPSO, disconnectable buoy, riser, and mooring are discussed while focusing on the design challenges of SLWR system. Due to the complexity of SLWR geometry, a systematic configuration approach is introduced based on buoy payload and riser performance criteria. The study includes the strength and fatigue analysis of production, gas export and water injection risers for the connected, disconnecting, and disconnected conditions. The sensitivity of buoy disconnecting due to vessel offset is also presented. It concludes that SLWR with disconnectable FPSO is a feasible and cost effective solution for deepwater field development in the Gulf of Mexico. The study demonstrates the importance of an integrated design approach, and provides guidance for configuring and design of future disconnectable systems with SLWRs.

scholarly journals Optimization approach for Arctic field development design using subsea production systems

2021 ◽  
Vol 1201 (1) ◽  
pp. 012071
Author(s):  
V V Beskhizhko
Keyword(s):  
Production System ◽  
Production Systems ◽  
Design Method ◽  
3D Models ◽  
General Nature ◽  
Optimization Approach ◽  
Field Development ◽  
Well Location ◽  
Subsea Production System ◽  
Offshore Field

Abstract Russian experience in the design of trunk pipelines and Arctic studies have been used to develop an efficient model and method for Arctic field development design using the subsea production system (SPS). Compared to 2D models used in the past, the new design technique offers an opportunity to make 3D models and can be used for optimization of offshore field development projects. The proposed optimization model is based on the Bellman - Ford algorithm developed for 3D networks. This approach has been used for the first time to capture key features and specific subsea production system design processes. The algorithm and block diagrams developed for the proposed SPS design method is universal. This method can be used to address tasks of a more general nature. Optimization of the particular case between a single start point (well location) and single end point (SPS facility) is implemented as a separate software package, but the scope of applications is not limited by such cases and may be extended even further. It can also be very efficient for Arctic subsea field development.

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