Pioneer Spuds Bison Well

Woodside reports that the Bison #1 exploratory well located in the Gulf of Mexico on Mustang Island Area Block A 81 was spudded on June 6, 2003. Ensco International's jackup, Ensco 64 will be used to drill the well. Water depth at the location is approximately 290 feet. Planned total depth is approximately 6,650 feet (referenced to the rig rotary table).

The Bison #1 well is the third of an eight well program that Woodside Energy (USA) Inc. and Pioneer Natural Resources USA, Inc. have agreed to drill in 2003 and 2004. Woodside and Pioneer are equal participants in the well.