In the Hugoton gas field in southwestern Kansas wells have been producing gas for approximately 12 years, and have declined more than 10 per cent from their initial pressure. With data from 284 wells available it is now possible to study the relation of pressure decline and well spacing to the total gas withdrawals weighted with respect to acreage in areas of equal pressure decline. The recent practice of treating the dolomitic limestone producing formations with acid has introduced a new complex factor into this study.

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