1 Introduction
1.1 Scope
In the life cycle of a project, the field development architecture and development strategy stage includes the greatest potential to impact the profitability of deepwater offshore fields.
This stage includes the following activities:
Create reservoir models
Select surface development concepts
Select sub-surface development concepts
Select the export system for the produced fluids and gas
Perform safety evaluation
Perform economic evaluation
The field architecture activity regroups the sub-surface and surface development concepts.
The purpose of this document is to review the tools and technologies available to define the possible configurations for a field development in terms of type of wellhead (i.e. subsea or surface trees), floaters, export systems, flowlines and SPS arrangements, etc., and to highlight the associated limitations, advantages and disadvantages.
This report commences ( Chapter 2, Field Development strategy) with a presentation of some project development strategies, which were recently applied with the purpose of minimising the cost of field development. It also includes a flow chart which is an attempt to provide an overall view of available ‘tools’ and technologies as part of the field architecture definition.
The Chapter 3, Floater and Development concept Selection deals with the field development concept selections. It presents the different available choices in term of production floater and related equipment (e.g. export system). The section also deals with the development nature, i.e. the pros and cons of a subsea development versus a surface tree based floater.
The possible subsea architectures for the wellheads are presented in Chapter 4, Well Architecture . This includes individual satellite wells and grouped wells, which may be in cluster or template configuration.
The flowline subsea architectures are described in Chapter 5, Flowline System Architecture , presenting in particular the single flowline versus the dual 'looped' lines configuration for the production system, including the technical issues related to these architectures.
The Chapter 6, Subsea Processing and Active Lifting summarises the available ‘subsea processing’ technologies and reviews the reasons and incentives for their applications in oil and gas reservoirs developments
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1.2 Codes, Standards, Specifications and Reference Documents
1.2.1 Deepwater Reference Books
[1] | T084-EN001 | ||
[2] | T084-EN002 | ||
[3] | T084-EN003 | ||
[4] | T084-EN004 | ||
[5] | T084-EN005 | ||
[6] | T084-EN006 | ||
[7] | T084-EN007 | ||
[8] | T084-EN008 | ||
[9] | T084-EN009 | ||
[10] | T084-EN010 | ||
[11] | T084-EN011 |
1.3 References
This study is based on the following sources
Industry available documentations, e.g. conference papers, publications, brochures
In house technical data and past experience in field architecture and systems design
1.4 Acknowledgements
We wish to thank the E&P companies, contractors, manufacturers for the provision with courtesy of technical information and photographs.
1.5 Definitions & Abbreviations
1.5.1 Definitions
1.5.2 Abbreviations
- API
American Petroleum Institute
- Bcf
Billion cubic feet
- BOP
Blow Out Preventer
- bpd
barrel per day
- CALM
Catenary Anchor Leg Mooring
- CAPEX
Capital Expenditure
- CDT
Cool Down Time
- EDP
Emergency Disconnection Package
- EDP
Emergency Depressurizastion
- EDP
Extended Draft Platform
- EPS
Early Production System
- EWT
Extended Well Test
- FLET
Flowline End Termination
- FPDSO
Floating Production Drilling Storage and Offloading
- FPSO
Floating Production Storage and Offloading
- FSU
Fluid Sampling Unit
- FSU
Floating Storage Unit
- FTL
Fluid Transfer Line
- GOR
Gas Oil Ratio
- GOM
Gulf of Mexico
- HAT
Hydrate Appearance Temperature
- ILT
In-Line Tee
- IPB
Integrated Production Bundle
- IPB
In Plane Bending
- LMRP
Lower Marine Riser Package
- MMboe
Million barrels of oil equivalent
- MMcf
Million cubic feet
- MODU
Mobile Offshore Drilling Unit
- MPP
Multi-Phase Pump
- OLS
Oil Loading System
- OPEX
Operational Expenditure
- PIP
Pipe in Pipe
- PiP
Pipe-in-Pipe
- PU
Production Unit
- PU
Pump Unit
- SCR
Steel Catenary Riser
- SHR
Single Hybrid Riser
- SPS
Subsea Production System (i.e. subsea structures such as X-mas trees, manifolds, etc.)
- SSP
Sevan Stabilized Platform
- STTR
Single Top Tension Riser
- SWHP
Surface Wellhead Platform
- TLP
Tension Leg Platform
- UFL
Umbilical and Flow Lines
- WAT
Wax Appearance Temperature
- WOA
West Of Africa