A Mississippian-age carbonate producer of the Illinois Basin. Active waterflood operations across southeastern Illinois and Western Kentucky.
Get Your Free Mineral ValuationTL;DR McClosky Limestone royalties across the Illinois Basin. The Mississippian-age carbonate producer supports active waterflood operations in southeastern Illinois and Western Kentucky.
The McClosky Limestone (sometimes called the McClosky "sand" by older operators despite being a carbonate) is a Mississippian-age carbonate interval producing oil across the central and southeastern Illinois Basin. The McClosky typically sits at 1,800 to 2,800 feet depth and is co-developed with the Aux Vases and Cypress in many fields.
The McClosky's productivity depends heavily on local porosity development through dolomitization and karstification — the formation can be highly productive in some fields and tight in others over short geographic distances.
Age: Mississippian (Valmeyeran/Chesterian)
Depth: 1,800–2,800 feet TVD across producing area
Lithology: Limestone with dolomitic and karstic porosity development
Stacked context: Below the Renault Limestone and Aux Vases; co-developed with both