U.S. Geological Survey Open-File Report 03-041
Figure 3B
Figure 3. The hydrocarbon composition, shown as gas dryness, C1/C2+, plotted as a function of depth for the three major stratigraphic sequences on the North Slope. 3A: Brookian reservoirs (green), 3B: Beaufortian reservoirs (blue), 3C: Ellesmerian reservoirs (red). Subsequent figures will use this color coding to distinguish samples from different stratigraphic sequences. Samples are from wells in known fields and individual wells outside of known accumulations. In each plot, vertical red and green lines mark C1/C2+ ratios of 100 (approx. 1% C2+) and 30 (approximately 3% C2+), respectively.
[an error occurred while processing this directive]