A Mississippian-age limestone producer in central and southern Illinois, with emerging interest as a CO2 sequestration reservoir for selected CCS projects.
Quick answer
The Salem Limestone is a Mississippian-age limestone formation that produces oil and gas across central and southern Illinois. The formation gives its name to the historic Salem oil field in Marion County, Illinois — one of the largest fields in the Illinois Basin. Salem Limestone production sits at typically 1,500 to 2,800 feet depth and is co-developed with the Aux Vases and Cypress in many fields.
The Salem has additionally drawn interest as a potential CO2 sequestration reservoir in selected Illinois Basin CCS projects, particularly where its porosity and confinement characteristics support storage modeling.
Marion County's Salem field was discovered in 1938 and at peak production exceeded 100,000 barrels of oil per day. Cumulative production from the Salem field has exceeded 250 million barrels. Many Marion County mineral interests trace back to original 1930s landowners and continue to receive royalty income from waterflood operations on the field.
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