Borehole gravity surveys in native-sulfur deposits, Culberson and Pecos counties, Texas

Native-sulfur deposits in west Texas are heterogeneous, with sulfur content and formation properties varying significantly over small vertical and horizontal distances. The zone of recovery of the Frasch process extends tens or even hundreds of feet around each recovery well, but the investigation depth of most wire-line logs is measured in inches. Consequently, the analysis of drill cores is still the primary method for the evaluation of sulfur deposits.