Video: Improving Cost Efficiency in Floating Production Facilities: Semi-Submersible Design Standardization
- David Hodapp (Chevron Energy Technology Company, ETC) | Wei Ma (Chevron Energy Technology Company, ETC) | David Wisch (Chevron Energy Technology Company, ETC) | Ming-Yao Lee (Chevron Energy Technology Company, ETC)
- Document ID
- Offshore Technology Conference
- Publication Date
- Document Type
- 2017. Copyright is retained by the author. This presentation is distributed with the permission of the author. Contact the author for permission to use material from this video.
- 2.1.3 Completion Equipment, 4.5 Offshore Facilities and Subsea Systems, 4.2.4 Risers, 4.2 Pipelines, Flowlines and Risers, 4.5 Offshore Facilities and Subsea Systems, 4 Facilities Design, Construction and Operation
- Deepwater, Facility Design Standardization, Standardization and Repetition, Cost Efficiency, Semi-Submersible
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The cost of deepwater field developments has risen over the past decade owing to cost escalation, operator self-imposed requirements, long schedule delays, etc. High oil prices during this period made it easy to overlook these underlying inefficiencies. With the current price of oil, however, these inefficiencies result in deepwater developments which have a difficult time competing with other opportunities for the same capital. As an industry, we cannot continue on the current path and expect to be successful going forward.
The vast majority of current deepwater facilities represent ‘one-of-a-kind’ designs. The current engineering workflow effectively starts with a ‘blank-sheet-of-paper’, and after much churn, tends to produce complex designs owing to preferential engineering and sub-optimization. These ‘one-of-a-kind’ designs, while frequently nominally cheaper on paper, often give rise to increased rework, deviation requests, change orders, etc. resulting in project cost and schedule overruns. For the hull, mooring, and riser design of deepwater platforms, a strategy of standardization and repetition is viewed as a promising opportunity for improving cost efficiency going forward.
A successful strategy of standardization needs to encompass standard designs, standard procurement specifications, standard contracting strategies, standard fabrication workflows, standard QA/QC processes, etc. Current industry efforts like JIP33 and the Unified JIP focus on common procurement specifications for equipment, components, and bulk material. These efforts are an important step toward reducing cost and schedule, but are only one aspect of the solution. A first step is to move away from ‘one-of-a-kind’ design practices and replace them with scalable, standard designs which enable follow-on standardization opportunities. Often, regional differences, e.g., variations in facility requirements and metocean conditions, etc. were thought to rule out any sort of facility standardization on both a regional and worldwide basis. Based on the authors' experience, a semi-submersible platform is feasible for a wide range of payloads; the introduction of deep-draft semi-submersibles and lazy wave risers in the last decade allows target riser performance criteria to be met in many regions around the world for wet tree applications. For these reasons, a semi-submersible platform emerges as an ideal candidate for floating facility design standardization.