Includes text, index map showing location of Rangely Oil Field, and 4 figures: Figure 1. Electric log of a well in the north part of the Rangely Oil Field : (after log by Schlumberger Well Surveying Corp.)--Figure 2. Sketch map of the Rangely Oil Field showing thickness of the interval between top of Dakota Sandstone and top of Weber Sandstone, as determined from electric logs - Sketch map of the Rangely Oil Field showing thickness of the redbeds (interval beween top of Chinle formation and top of Weber Sandstone), as determined from electric logs - Figure 4. Curves showing correlation indexes of crude oils in Rangely field.