Drilling hitch forces Don SW sidetrack

Petrofac Energy Developments has run into problems with its latest development well on the Don Southwest field in the UK North Sea.

Offshore staff

Woking, UK -- Petrofac Energy Developments has run into problems with its latest development well on the Don Southwest field in the UK North Sea. According to partner Valiant Petroleum, the horizontal production well drilled into Area 22 in the south of the field failed to flow significant quantities of oil. Following a well intervention program, the well did flow, but then weather andmechanical problems on the rig led to curtailment of the test.

Based on data collected during the test period, the partners agree that the well’s drill path - in and along the main northern bounding fault to the Area 22 compartment - may lead to oil flow problems over time. They have therefore decided to drill a sidetrack south of the current location, away from the main fault zone, to maximize productivity from the well.

The sidetrack is expected to take around 45, depending on the weather. This operation also means that for logistical reasons, water injection to Don Southwest will not be switched on until the rig has moved off location.

12/03/2009

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