OCTOPLUS: A New Generation of FPSO for Deepwater

2006 ◽  
Author(s):  
Guillaume Geoffroy ◽  
Franc¸ois Pe´trie´ ◽  
Michel Vache´ ◽  
Karl Mitchell ◽  
C. Guedes Soares ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Process Equipment ◽  
Execution Plan ◽  
Oil Storage ◽  
Deep Waters ◽  
Gas Standards ◽  
Offshore Oil And Gas ◽  
The Cost ◽  
New Generation ◽  
Offshore Oil

Today, FPSOs are usually converted tankers (VLCCs) or box-shaped new-built vessels. In either case, the hull provides oil storage capacity whereas process equipment, utilities and accommodation are spread over the deck area. The hull is built or converted following conventional shipyard practices before the topside are installed as small pre-assembled units built to offshore oil and gas standards. The OCTOPLUS is a new concept Floating Production Storage and Offloading (FPSO) vessel designed for deep and ultra-deep waters. This new generation FPSO vessel allows the hull and the topsides to be built and transported independently, and then mated at the field location. To provide confidence in the concept to potential end users, the integrity of the OCTOPLUS design has been evaluated over a three year EC development study, which included model testing. The cost, schedule, execution plan and operation of a development based on the OCTOPLUS were also established and compared to a standard FPSO. This paper presents the results and conclusions of this three year study and the current development status of the OCTOPLUS concept.

SUBSEA PRODUCTION FOR WELLS DRILLED FROM JACKUP DRILLING UNITS

1987 ◽  
Vol 27 (1) ◽  
pp. 357
Author(s):  
M. Thatcher ◽  
D.B. Marietta
Keyword(s):  
Oil And Gas ◽  
Production Systems ◽  
Oil And Gas Fields ◽  
Offshore Oil And Gas ◽  
The Cost ◽  
Gas Fields ◽  
Offshore Oil

Subsea production systems have been an accepted method of developing offshore oil and gas fields since the installation of the first subsea trees in the early 1960s offshore California. Generally subsea completions have been done from floating drilling vessels on wells with subsea wellhead equipment. A number of wells have been completed subsea by bottom supported jackup rigs on wells drilled using mudline suspension equipment. The subsea completion equipment and methods utilised to adapt mudline suspension wells for a subsea production tree are described. This method of completion offers important benefits as it allows completion of wildcat or delineation wells, it can be used in areas of small, scattered reservoirs, and it can be used in conjunction with floating production systems. The cost associated with these subsea completions is roughly equivalent to those of standard subsea completions from floating vessels. An overview of a typical completion system is presented and compared.

scholarly journals An In-depth Analysis for Optimal Cable Tray Support Span

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Erkan Oterkus ◽  
Sung Wuk Jung
Keyword(s):  
Finite Element ◽  
Oil And Gas ◽  
Element Analysis ◽  
Depth Analysis ◽  
Manual Handling ◽  
Offshore Oil And Gas ◽  
The Cost ◽  
Optimal Span ◽  
Offshore Oil ◽  
Modelling Approach

Nowadays, it is crucial to reduce the cost of the overall project so that the competitiveness of offshore oil and gas without compromising on quality or safety can be achieved. This study investigates how to define the longest cable tray support span considering constructability in order to reduce the number of supports which is a chief cost of a cable tray system. This study presents not only material and geometry frequently used for cable tray but also the formula to estimate the maximum cable load which can be installed within cable tray. To verify the longest span without increasing the strength(thickness) of cable tray, finite element modelling approach was employed based on ANSYS and comparisons were made between numerical analysis and simplified hand calculation. The constructability for the longer span obtained from finite element analysis has been validated in view of manual handling of the cable tray. It is shown that the optimal span suggested in this paper can lead to a better economic benefit without degrading the constructability. For instance, as the span is longer, the cost of material as well as construction manpower can be saved. It is also expected that this approach will contribute to enhance the competitiveness of offshore oil and gas.

Risk Assessment Study for a Floating, Production, Storage and Offloading Vessel (FPSO) in Deep Waters

2014 ◽  
Vol 700 ◽  
pp. 495-500
Author(s):  
Bruna C. de S. Lima ◽  
Lucas G. de Goes ◽  
Natália P.M. Silva ◽  
Paola C. Almeida ◽  
Erick B.F. Galante ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Oil And Gas ◽  
Gas Production ◽  
Quantitative Risk Assessment ◽  
Storage Unit ◽  
Oil And Gas Production ◽  
Deep Waters ◽  
Assessment Study ◽  
Offshore Oil And Gas ◽  
Offshore Oil

This paper presents a quantitative risk assessment study on a Floating, Production, Storage and Offloading Vessel that operate in Brazilian offshore oil and gas production waters. In particular a study of the risks applied to a Storage Unit and Transfer Oil, focusing on the physical, especially in operations involving storage and handling of flammable liquids. The results showed that the unit must take safety measures process, because a failure in the system can affect other units; the level of security for the population of the ship is within the acceptable.

Autonomous Underwater Vehicles: The Latest Tool for Archaeological Investigations

2002 ◽  
Vol 36 (3) ◽  
pp. 45-50 ◽  
Author(s):  
Robert A. Church ◽  
Daniel J. Warren
Keyword(s):  
Cost Effectiveness ◽  
Gulf Of Mexico ◽  
Oil And Gas ◽  
Autonomous Underwater Vehicles ◽  
Underwater Vehicles ◽  
First Year ◽  
Archaeological Investigation ◽  
Offshore Oil And Gas ◽  
The Cost ◽  
Offshore Oil

In 2001, C&C Technologies, Inc. of Lafayette, Louisiana began using the HUGIN 3000 AUV in the Gulf of Mexico for offshore oil and gas surveys. This new survey vehicle is faster, more accurate, and more maneuverable than conventional deep-tow systems and has raised the bar for deepwater geophysical and hydrographic surveys. Although archaeology was not the primary purpose for developing the vehicle, archaeologists are and will continue to benefit from its use. Archaeological investigation with a conventional deep-tow system is seldom conducted during industry surveys because of the cost and time involved in operating such a system. However, during the first year of operation with the HUGIN 3000, four shipwrecks were investigated as a result of the HUGIN's cost effectiveness. The use of the HUGIN 3000 directly led to the discovery of the long sought after German submarine, U-166, which was located near its last victim, the passenger freighter SS Robert E. Lee. This AUV also helped document two additional newly discovered shipwrecks: The cargo freighter SS Alcoa Puritan and a small wooden sailing vessel known as the Mica wreck.

Dynamic Behavior of a Vertical Riser and Service Life Reduction

2005 ◽  
Author(s):  
Celso K. Morooka ◽  
Fa´bio M. Coelho ◽  
Elton J. B. Ribeiro ◽  
Jose´ A. Ferrari ◽  
Ricardo Franciss
Keyword(s):  
Service Life ◽  
Dynamic Behavior ◽  
Oil And Gas ◽  
Bending Moments ◽  
Floating Platform ◽  
Deep Waters ◽  
Vortex Induced Vibrations ◽  
Steel Catenary Risers ◽  
Offshore Oil And Gas ◽  
Offshore Oil

In the last years, the most of offshore oil and gas reserves discoveries in Brazil are placed in ultra-deep water depths. Petroleum production from these offshore fields needs developments with novel solutions in terms of necessary technologies and economical viability. The use of vertical rigid risers such as top tensioned risers (TTR) and others like combined systems as self standing hybrid risers and steel catenary risers for ultra-deep waters have shown viable from both, technical and economical aspects. However, there are needs for detailed studies on their dynamic behavior in order to improve, particularly, the understanding of influence of the environment as wave and current, and floating platform oscillations at the riser top. The present work presents studies on vertical top tensioned riser dynamic behavior through time domain simulations of its displacements and respective, bending moments and stresses. Influences of the vortex induced vibrations (VIV) and waves on the riser service life reduction are analyzed. Maximum and minimum envelops for displacements and stresses along riser length are shown.

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