The original fluid(s) contained in a storage reservoir: either natural gas, water, or oil, as reported in either IGS Special Report 01, Underground storage of natural gas in Indiana, 1963 or <IGS Special Report 59, Underground storage of natural gas in Indiana (revised), 1998> .
The Original Reservoir Contents is manually entered in the Gas Storage Field Summary.
Dawson, T. A. and G. S. Carpenter,1963, Underground storage of natural gas in Indiana: Indiana Geological Survey, Special Report 01, 29 p.
Keller, S. J., 1998, Underground storage of natural gas in Indiana: Indiana Geological Survey, Special Report 59, 77 p.