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Inorganic ground-water chemistry at an experimental New Albany Shale (Devonian-Mississippian) in situ gasification site

Fuel

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Abstract

Experimental in situ gasification of New Albany Shale (Devonian-Mississippian) has been conducted in Clark County. Analyses of ground water sampled from a production well and nine nearby monitoring wells 3 months after a brief in situ gasification period revealed changes in water chemistry associated with the gasification procedure. Dissolved iron, calcium and sulphate in ground water from the production well and wells as much as 2 m away were significantly higher than in ground water from wells over 9 m away. Dissolved components in the more distant wells are in the range of those in regional ground water. Thermal decomposition of pyrite during the gasification process generated the elevated levels of iron and sulphate in solution. High concentrations of calcium indicate buffering by dissolution of carbonate minerals. While iron quickly precipitates, calcium and sulphate remain in the ground water. Trends in the concentration of sulphate show that altered ground water migrated mostly in a south-westerly direction from the production well along natural joints in the New Albany Shale. ?? 1991.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Inorganic ground-water chemistry at an experimental New Albany Shale (Devonian-Mississippian) in situ gasification site
Series title:
Fuel
Volume
70
Issue:
11
Year Published:
1991
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Fuel
First page:
1317
Last page:
1323
Number of Pages:
7