Abstract
Commercial quantities of hydrocarbons in the Toronto Member of the Oread Formation (Shawnee Group, Upper Pennsylvanian) were discovered in November, 1980. The field subsequently was developed to include 33 Toronto wells which produce on pump assisted by a dissolved gas drive. Estimated ultimate recovery is 1,500,000 bbls of oil, based on a recovery efficiency of 35%. Cumulative primary production to January, 1986 is 91,180 stock tank barrels (STB) of 40° API gravity oil. Initial reservoir pressure was 1,700 psi, with a maximum production rate of 1,080 barrels of oil/day (BOPD). Since then, reservoir pressure has fallen to 250 psi and production has declined to 185 BOPD.
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