# Westfield Field Mineral Rights in Clark County, Illinois

## TL;DR

Westfield Field is a mature Illinois Basin waterflood operation in Clark County, Illinois—one of the northernmost producing fields in the Basin. The field produces from Mississippian-age Cypress and Aux Vases sandstones and is characterized by long-tail royalty cash flows typical of mature Illinois Basin operations. Many mineral interests are inherited multiple generations deep, with original leases dating to the early 1900s, and out-of-state heirs are common.

## Key Takeaways

- Westfield Field operates under continuous waterflood with multiple long-tenured private operators in Clark County, Illinois
- Primary producing formations are Mississippian-age Cypress Sandstone and Aux Vases Sandstone
- The field exhibits typical Illinois Basin characteristics: small monthly royalty checks extending over decades (15-30+ year reserve life)
- Many mineral interests are inherited across multiple generations with original lease bonuses paid in the early 1900s, creating dispersed out-of-state ownership
- Direct buyers value interests using 3-7% annual decline rates, 9-13% discount rates, and assess operator quality and potential CCS/45Q optionality
- Indiana's 20-year Dormant Mineral Act creates urgency for absentee owners on cross-border Illinois Basin fields
- Buckhead Energy facilitates remote sales for out-of-state owners with free written offers, notarized deed execution, and same-day wire transfer upon recording

## Page Highlights

**Field Overview**: Westfield Field is operated by multiple private operators in Clark County, part of the Illinois Basin producing region with continuous oil production since the late 1800s. The field runs on continuous waterflood and delivers the long-tail royalty profile characteristic of mature Basin operations.

**Producing Formations**: Production comes from Mississippian-age Cypress Sandstone and Aux Vases Sandstone reservoirs, which are common producing intervals throughout the Illinois Basin.

**Mineral Interest Types**: Interests typically include producing royalty interests (tract contributions to monthly revenue), 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 rights). Multi-generational inheritance is common with heirs dispersed across states.

**Valuation Factors**: Direct buyers use discounted cash flow models incorporating 3-7% annual decline rates, 15-30+ year remaining reserve life, operator quality assessment, 9-13% discount rates for stable waterflood cash flows, and potential CCS/45Q optionality from underlying Mt. Simon Sandstone sequestration potential near the Wabash Valley Resources hub.

**Sale Process**: Buckhead Energy handles remote transactions for out-of-state owners through free written offers, state-notarized deeds, recording with Clark County clerk, and wire transfer on recording day.

**Regional Context**: The page lists ten other major Illinois Basin fields including Clay City Consolidated, Salem Consolidated, Loudon, New Harmony Consolidated, Mt. Carmel, Lawrence, Main Consolidated, Bridgeport, and Olney Consolidated fields.

## Dataset Information

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## Related Topics

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

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

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