Offshore staff

(West Africa) - Pioneer participated in the drilling of the Pina 1-X well on block 256 (25% working interest) in the deepwater of Nigeria.

The 631,000-acre block is operated by Devon Energy.

The well tested multiple objectives on a large thrust structure located near the western edge of the block.

It was was drilled to a total depth of 16,645 ft and found two non-commercial gas reservoirs.

The partners plan to drill a well in early 2007 to test a different play type.

04/10/06