This is a log from an oil or gas well in the Bureau of Economic Geology's Geophysical Log Facility. API Number: 424173666200 Top Depth: 47 Ft. Bottom Depth: 1684 Ft. lease_name: HOLSTEIN ESTATE #20 reservoir_name: PETRANOL (BLUFF CREEK) operator_name: NUEVE OPRG CO OF TX INC log_source_name: RRC datum_name: Unknown state_name: Texas county_name: Shackelford