How far into the panhandle does the Wolfcamp extend?

I have seen on DrillingInfo Wolfcamp wells completed by Oxy back in 2002 in the very southern part of Lamb County, but have not heard of any other Wolfcamp activity in Bailey, Lamb, Hale or other counties in that area. Anyone know if this play extends much farther into these counties? Any shale activity in these counties?

I meant 2008 is when the Oxy wells were drilled.

I have not heard of any drilling activity, planned or existing wells north of the Oxy Fields regarding Wolfcamp activity. I am hearing of many planned horizontal wells into counties west, i.e., Hockley/Cockran. There may be some speculation into areas north, but by most counts Lubbock County would be the northern border of the Wolfcamp influence.