From the article;
[Operators have coined the term “Wolfberry” to denote the combined Spraberry and Wolfcamp target intervals of interbedded shales and carbonates encountered at depths ranging from 7,000 to 10,500 ft, Fig. 2.]
Is this close to the Ranger field you describe?
Not much technology being used there. I had the tell the pumper two months ago that my buddy's well had a casing leak and needed a squeeze job. The pumper said it may just be old drilling mud oozing from the head. *That well was completed in the early 50's.
A week later the work-over rig was up and waiting for the cementing crew to come in.