Tuesday, March 18, 2008 - 9:20 AM
Convention Center, Second Level, 210 (Ernest N. Morial Convention Center)
08354

Barium Sulfate Scale Management Redefined: The A14(A8) Success Story

Jonathan J. Wylde, Clariant Oil Services; Alistair W. Duthie and Brian Cornock, BP Exploration and Operating Company Ltd.; Ian MacRae, BP Exploration and Operating Company Ltd; Damir Bertovic, Concept Integrated Production Resources Ltd

In October 2006 the Bruce platform successfully brought A14(A8) online after no less than 7¾ years of dormancy and lost production. The well had remained shut in for so long due to the substantial increase in scale risk that this well would have introduced to the process plant, and particularly the main oil line booster pumps. The produced water from this well contained more than 1,600 mg/l barium and if allowed to commingle with seawater coming from other wells and systems would have disastrous consequences. Bringing the well online was made possible due to a significant review and redefinition of not only the scale management but also on the way the plant was operated and reaction to changing conditions.

 An in depth pre-start assurance checklist was developed that involved changing out the topside scale inhibitor to a newly developed blend as well as modifying aspects of the chemical injection system. Use of an on-site scale detection method was introduced and the philosophy of managing all the water handling plant systems reviewed. In depth procedures for operating the well were developed and a contingency scale inhibitor delivery system put in place. A significant workload was completed in preparing the well to flow, this did uncover a few surprises that were managed successfully. The well was brought on at 4.17 MBOED a production gain that could not have been realised without this change in scale management philosophy.