Division of Spill Prevention and Response


Incident Description
Location Kuparuk River Unit, Drill Site 1-D, Well 132
Product/Quantity ConocoPhillips Alaska, Inc. (CPAI) originally estimated that 1050 gallons (25 barrels) of diesel fuel and an unknown quantity of produced water was released. CPAI then reported that a review of well records indicated that this well was never freeze protected with diesel but was freeze protected with brine instead, and leaked only a small amount of diesel and an unknown amount of brine. On July 18, 2005, CPAI reported that a critical piece of information had been missing from the well file and CPAI discovered that the well had indeed been freeze protected with diesel and that an estimated 1386 to 1596 gallons (33 to 38 barrels) was spilled along with an unknown amount of produced water from the formation.
Cause Leaking well casing. It has been determined that down hole communication between the production casing, inner annulus, surface casing, and outer annulus caused the diesel and produced water to be forced up into the well cellar.
Time/Date of Spill The spill was discovered on July 12, 2005 at 3:00 PM. ConocoPhillips reported the spill to the ADEC on July 13, 2005 at 11:15 am.
Situation Reports
07/13/2005 (PDF 33K)  
07/14/2005 (PDF 33K) -- FINAL
(NOTE: This is a revised version of the 7/14/2005 situation report.)
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