# Clay City Consolidated Field Mineral Rights in Wayne County, Illinois

**TL;DR:** The Clay City Consolidated field in Wayne, Clay, and Richland counties is Illinois's largest cumulative oil field, having produced over 100 million barrels since the early 1900s. The field operates under continuous waterflood maintenance across multiple Mississippian-age formations and generates long-tail royalty income typical of mature Illinois Basin operations. Many mineral interests are inherited multiple generations deep, and Buckhead Energy purchases these interests with remote closing processes for out-of-state owners.

## Key Takeaways

- Clay City Consolidated is Illinois's largest cumulative oil field with over 100 million barrels of total production, spanning Wayne, Clay, and Richland counties in the Illinois Basin
- The field operates under continuous waterflood maintenance with multiple long-tenured private operators delivering predictable long-tail production profiles
- Primary producing formations include Mississippian-age Aux Vases Sandstone, Cypress Sandstone, and McClosky Limestone reservoirs
- Mineral interests are commonly inherited multiple generations deep, with many original leases dating to the early 1900s and heirs now spread across multiple states
- Valuation uses discounted cash flow modeling with 3–7% annual decline rates, 15–30+ year reserve life, and 9–13% discount rates for stable waterflood cash flows
- Selected acreage has potential Mt. Simon Sandstone CCS sequestration value beneath producing zones (45Q optionality in the Wabash Valley Resources hub area)
- Buckhead Energy handles remote transactions for out-of-state owners with free written offers, notarized deeds, county recording, and same-day wire transfers
- Indiana's 20-year Dormant Mineral Act creates urgency for absentee owners on cross-border Illinois Basin fields

## Page Highlights

**Field Overview**: Clay City Consolidated field is a multi-county (Wayne, Clay, Richland) Illinois Basin asset distinguished as Illinois's largest cumulative oil producer with 100+ million barrels. Multiple stripper operators maintain continuous waterflood operations across the field complex, generating the long-tail royalty profile characteristic of mature Illinois Basin fields.

**Producing Formations**: Production comes from Mississippian-age reservoirs including Aux Vases Sandstone, Cypress Sandstone, and McClosky Limestone. The page references additional Illinois Basin formations (Salem Limestone, Tar Springs Sandstone) for deeper geological context.

**Mineral Interest Types**: Common ownership structures include producing royalty interests (active production revenue share), non-producing mineral interests (fee ownership outside active zones), overriding royalty interests (ORRI carved from working interests), and non-participating royalty interests (NPRI with no leasing/development rights).

**Valuation Methodology**: Direct buyers apply discounted cash flow analysis incorporating 3–7% annual decline rates, 15–30+ year remaining reserve life, operator quality assessment, 9–13% discount rates, and potential CCS/45Q value from underlying Mt. Simon Sandstone sequestration capacity in specific hub areas.

**Sales Process**: Buckhead Energy purchases Clay City Consolidated interests with fully remote processes designed for out-of-state heirs—free written offers via email, notarized deed execution in owner's home state, Wayne County clerk recording, and wire transfer on recording date.

**Regional Context**: The page positions Clay City within the top 10 Illinois Basin fields alongside Salem Consolidated, Loudon, New Harmony Consolidated, Mt. Carmel, Lawrence (with historical CO2 pilot), Main Consolidated (Marathon steam project), Bridgeport, Olney Consolidated, and Westfield.

## Related Topics

- [Illinois Basin — The Definitive 2026 Guide](https://www.buckheadenergy.com/illinois-basin)
- [Aux Vases Sandstone formation page](https://www.buckheadenergy.com/formations/aux-vases-sandstone)
- [Cypress Sandstone formation page](https://www.buckheadenergy.com/formations/cypress-sandstone)
- [McClosky Limestone formation page](https://www.buckheadenergy.com/formations/mcclosky-limestone)
- [Salem Limestone formation page](https://www.buckheadenergy.com/formations/salem-limestone)
- [Tar Springs Sandstone formation page](https://www.buckheadenergy.com/formations/tar-springs-sandstone)
- [How to Sell Mineral Rights guide](https://www.buckheadenergy.com/guides/how-to-sell-mineral-rights)
- [What Are My Minerals Worth?](https://www.buckheadenergy.com/guides/what-are-my-minerals-worth)

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**About Buckhead Energy**  
Buckhead Energy is a direct mineral rights buyer with 18+ years of experience acquiring mineral and royalty interests across major U.S. oil and gas basins. We provide transparent valuations and handle all aspects of the transaction process for mineral owners.

**Ready to discuss your Clay City Consolidated field minerals?** [Get your free valuation at Buckhead Energy](https://www.buckheadenergy.com/sell)