PROPERTIES OF UTAH TAR SANDS--FLAT ROCK MESA AREA, HILL CREEK DEPOSIT

摘要

This report presents the results of analyses of three cores from the Flat Rock Mesa area in the Hill Creek tar sand deposit in north-eastern Utah. Two major tar sand zones exist in the Flat Rock Mesa area and have net thicknesses ranging from 55 to 81 ft. The overall tar sand section has good porosity, averaging 20.2 pct of bulk volume;fair permeability before and after oil extraction, averaging 150 and 325 md, respectively;and low average oil saturation, 29.7 pct of pore volume. Average gravity of the oil is 9.4° API. Average sulfur and nitrogen content are 0.45 and 0.73 weight pct, respectively.