The Subsurface Library, founded in 1962, is the premier petroleum data library for the Permian Basin, the largest oil and gas basin in the United States.

The Library's well log index, Amerada scout tickets and Kroenlein scout cards are searchable online by location.

Our files contain both current and historical well data and include many unique and hard to find data sets that cannot be found anywhere else. 

The Library also has an office inside the Bureau of Economic Geology in Austin for access to statewide well data at the Texas Railroad Commission and the General Land Office.