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Title: Inert Gas Applications In Natural Gas Storage: Studies In The Michigan Stray Sandstone
Author: Stephen F. Nowaczewski
Source: American Gas Association 2001
Year Published: 2001
Abstract: During the past decade, there has been a market drive for competitive storage services at competitive costs. One of the major costs associated with storage is that of base gas. In 1986, the Gas Research Institute (GRI) and the Institute of Gas Technology (IGT) began research efforts to demonstrate inert gas technology applications in natural gas storage, and in the early 1990s ANR Pipeline systematically reviewed the storage fields it operated to determine likely economic applications of the technology. The Austin field, a natural reservoir in the Michigan Formation Stray Sandstone, was selected as the best candidate for an initial application: 2 Bcf of base gas would be produced from a discrete part of the field and replaced by 2 Bcf of nitrogen. The project at Austin is now underway, with over one-half of the targeted base gas produced, and nitrogen injection is slated to begin in 2002. In addition, ANR Pipeline also has studied the use of nitrogen as a pressure enhancement production tool in the Croton field, a small Michigan Stray Sandstone reservoir that ANR is abandoning from storage service. This paper discusses the screening studies for candidate reservoir selection, the study and planning processes for the Austin project, the implementation at Austin, and the study and implementation of the technology at Croton.

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