DOT 2011: Steel Catenary Risers for High Pressure High Temperature Development

Steel catenary risers (SCRs) have emerged as an attractive solution for deepwater subsea field development.

Following is an abstract of a presentation that will be featured at the Deep Offshore Technology International Conference & Exhibition in New Orleans, Oct. 11-13:

Dr. Rupak Ghosh

Steel catenary risers (SCRs) have emerged as an attractive solution for deepwater subsea field development. Notable advantages are the reliability and integrity during field life with relatively low cost.

However, the recent exploration success of high pressure (up to 15 ksi) and high temperature (up to 250°F) reservoirs (HP/HT) poses design challenges in terms of fabrication of thick-walled pipes, riser hang-off system selection, and long-term fatigue design. These challenges are further enhanced when the application is associated with floaters such as semisubmersibles, FPSOs, and TLPs.

This paper presents a design philosophy for HP/HT SCR design. The issues center on fatigue design strategy of thick-walled section, realistic soil/pipe modeling, and strain-based design philosophy in survival and accidental conditions. Using case studies, the proposed design philosophies will be compared to general design philosophies adopted by offshore industry.

This presentation will be featured at the Deep Offshore Technology (DOT) Conference & Exhibition in New Orleans. It is scheduled for 10 a.m., Thursday Oct. 13, in Suite C Room 15 of the Hilton Riverside.

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