# Main Consolidated Field Mineral Rights — Crawford County, Illinois

## TL;DR

The Main Consolidated Field in Crawford County, Illinois, is one of the few Illinois Basin fields using steam injection alongside waterflood for enhanced oil recovery, a legacy of Marathon Oil's operations. The field produces from Robinson and Cypress Sandstones and exhibits the long-tail royalty profile typical of mature Illinois Basin operations—small monthly checks spanning decades. Many mineral interests trace back to original 1900s-era leases and have been inherited through multiple generations.

## Key Takeaways

- **Main Consolidated is one of the few Illinois Basin steam-injection projects**, historically operated by Marathon Oil, using enhanced recovery techniques uncommon in the region
- **Produces from Mississippian-age reservoirs** including Robinson Sandstone and Cypress Sandstone with typical 3-7% annual decline rates
- **Many mineral interests are inherited multiple generations deep**, with original lease bonuses paid in the early 1900s and current owners often spread across multiple states
- **Valuation uses discounted cash flow modeling** with 9-13% discount rates, factoring in 15-30+ year reserve life and potential Mt. Simon Sandstone CCS sequestration value beneath producing zones
- **Out-of-state owners are common and can sell remotely**, with the entire transaction process handled via email, remote notarization, and county recording
- **Field exhibits long-tail royalty cash flow profile** characteristic of mature Illinois Basin waterflood operations with small but consistent monthly payments over decades
- **Cross-border fields face Indiana's 20-year Dormant Mineral Act**, creating urgency for absentee owners on fields spanning the Illinois-Indiana border
- **Direct buyers value operator quality heavily**, as long-tenured Illinois Basin operators typically deliver predictable production from actively-maintained units

## Page Highlights

**Field Overview**: The Main Consolidated Field is located in Crawford County within the Illinois Basin, one of North America's longest-producing regions with continuous oil production since the late 1800s. Marathon Oil historically operated the field using steam injection alongside waterflood—a distinctive recovery method rarely employed in Illinois Basin fields.

**Producing Formations**: The field produces from Mississippian-age reservoirs including Robinson Sandstone and Cypress Sandstone, with related Illinois Basin formations including Aux Vases, McClosky Limestone, Salem Limestone, and Tar Springs Sandstone.

**Mineral Interest Types**: Interests typically include producing royalty (monthly revenue contribution), non-producing mineral ownership (fee minerals outside active zones), overriding royalty (ORRI carved from working interest), and non-participating royalty (NPRI with no leasing rights). Many interests trace to original early-1900s leases.

**Valuation Methodology**: Direct buyers use discounted cash flow with key inputs of 3-7% annual decline rates, 15-30+ year reserve life, operator quality assessment, 9-13% discount rates for stable waterflood cash flows, and potential CCS/45Q value from Mt. Simon Sandstone sequestration opportunities beneath producing zones.

**Sales Process**: Buckhead Energy handles remote transactions for out-of-state owners common to multi-generational Illinois Basin interests, providing free written offers, remote notarization, county recording with Crawford County clerk, and same-day wire transfer upon recording.

**Related Illinois Basin Fields**: Other major fields include Clay City Consolidated, Salem Consolidated, Loudon, New Harmony Consolidated, Mt. Carmel, Lawrence (with historical CO2 pilot), Bridgeport, Olney Consolidated, and Westfield.

## Related Topics

- [Illinois Basin — The Definitive 2026 Guide](https://www.buckheadenergy.com/illinois-basin)
- [How to Sell Mineral Rights](https://www.buckheadenergy.com/how-to-sell-mineral-rights)
- [What Are My Minerals Worth?](https://www.buckheadenergy.com/what-are-my-minerals-worth)
- [Should I Sell?](https://www.buckheadenergy.com/should-i-sell)
- [Beginner's Guide](https://www.buckheadenergy.com/beginners-guide)
- [Getting a Fair Price](https://www.buckheadenergy.com/getting-a-fair-price)
- [US Drilling Activity Index](https://www.buckheadenergy.com/us-drilling-activity-index)
- [Oil & Gas Market Data Hub](https://www.buckheadenergy.com/oil-gas-market-data-hub)

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**About Buckhead Energy**: Buckhead Energy is a BBB-accredited direct buyer of mineral rights and royalty interests operating across 33 states since 2007, purchasing with its own capital and handling remote transactions for out-of-state mineral owners.

**Ready to get a fair offer?** Visit https://www.buckheadenergy.com/sell to start your free valuation today.