Source: Adapted from Christopher J. Schenk and Richard M. Pollastro, “Natural Gas Production in the United States: National Assessment of Oil and Gas Fact Sheet,” U.S. Geological Survey, January 2002, Figure 1. Artwork prepared by Ira G. Liss.

Plate 1. The Structure of Oil and Gas Reservoirs


Source: Slightly adapted from Stephen A. Holditch, “Tight Gas Sands,” Journal of Petroleum Technology, June 2006, 84–90. Figure 1, p. 84.

Plate 2. The Natural Gas Resource Triangle

Source: Adapted from U.S. Energy Information Administration, “Review ...

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