AWE Fails to Resolve Mechanical Drill String Difficulties at Pateke Well

AWE Limited reported Tuesday that as at 06:00 hours (6.00am NZDT) today, the Pateke-4H development well in petroleum mining permit (PMP) 38158 off New Zealand was preparing to sidetrack a short section of lower wellbore. The mechanical drill string difficulties experienced in the original hole were unable to be fully resolved and the lower part of the hole has been abandoned. It is now proposed to sidetrack with a 12.25 inch drilling assembly from a measured depth of 11,073 feet (3,375 meters), drill into the F10 reservoir at a horizontal angle of approximately 90 degrees, and then set the 9.625 inch casing at approximately 13,484 feet (4,110 meters) as planned. The well will then be drilled horizontally through the F10 reservoir to a total measured depth of 17,588 feet (5,361 meters).

The Kapuni F10 sandstone objective has already been intersected on prognosis with oil shows and real time logging measurements indicating the likely presence of an oil bearing reservoir, which is very encouraging. However, the commercial significance of the oil shows will not be clear until the horizontal drilling has been completed.

The Pateke-4H development well is in PMP 38158 and AWE is the Operator. Located in the offshore Taranaki Basin, New Zealand, PMP 38158 contains the Tui, Amokura and Pateke fields and has been producing since 2007.

Pateke-4H is targeting a mapped northern extension of the currently producing Pateke field. The well is being drilled in water depth of approximately 406 feet (124 meters) with a planned total measured depth of 17,588 feet (5,361 meters), including a 4,173 feet (1,272 meters) horizontal section. If successful, the well will be completed for subsequent tie-back to the Tui FPSO (Umuroa) for production in 2015.

The Joint Venture partners in PMP 38158 are:

  • AWE Limited (via subsidiaries) (Operator): 57.5 percent
  • New Zealand Oil & Gas (via subsidiaries): 27.5 percent
  • Pan Pacific Petroleum (via subsidiaries): 15.0 percent


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