The Phoenix Development project was sanctioned to rejuvenate wells and reservoirs historically associated with the Typhoon and Boris fields. These fields sit in approximately 2,000 feet of water in OCS blocks Green Canyon 236 & 237 (Typhoon), 238 (Little Burn), & 282 (Boris). Cumulative production of 50 million barrels of oil equivalent was produced through the Typhoon tension leg platform (" TLP??) from start-up in July 2001 through September 2005. Damage to the Typhoon TLP, sustained during Hurricane Rita, forced the field to be shut-in. Final production averaged 13,000 barrels equivalent per day from four historical completions. Two additional wells were finalizing rig activity to restore field production levels to peak rates of over 35,000 barrels equivalent per day. A full economic evaluation was performed to determine the feasibility of a redevelopment project. Key indicators included the state of the subsea infrastructure and debris, analysis of subsurface performance along with host facility options. The details within this paper will give background information into the evaluation through sanction, install activities on site and results from initial production through the Helix Producer 1 (" HP 1??) host facility. Ownership of the Phoenix Development project is Energy Resource Technology GOM (WI- 70%) and Sojitz Energy Venture, Inc. (WI- 30%).
The original operators, Chevron and BHP, performed inspections during the early response phase to assess damage to the subsea infrastructure. Inspections using both direct ROV intervention, as wells as side scan sonar were used to observe the subsea trees, flow lines and export pipelines as well as map the seafloor debris field. The 10?? × 12?? oil export steel catenary riser (" SCR??) and 18?? × 20?? gas export SCR were severed from the TLP along with four flexible Typhoon flow lines, five umbilicals and the Boris bulk oil gathering line. No gross damage was observed at the wellhead or trees for the previously producing wells. No leakage was observed at any of the severed pipeline ends and though the subsea distribution unit for the Boris field was off location by some fifteen hundred feet, it was in good condition. The debris field was largely disassociated with the lay routes as the TLP exited the basin in a north westerly direction. With the exception of the remaining umbilical and pipeline damage the debris field was entirely confined to the GC 236 and GC 237 blocks.