This paper presents the relative economics to develop and produce non-associated gas from nine field sizes at four depths in eight U.S. regions. Exploration costs are excluded. In general, for a given field size it requires roughly twice the price to yield the same discounted cash flow rate of return as depth increases from 7,500 to 12,500 feet. The price roughly doubles again in going from 12,500 feet to 17,500 feet. At each depth, a large increase in price was required for economic development as field size decreases. Regional factors can also have a significant bearing on field economics especially where drilling and operating costs are exceptionally high.

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