# Heidelberg East Field Unit Mineral Rights Guide — Jasper County, Mississippi

**TL;DR:** The Heidelberg East field in Jasper County, Mississippi, is a long-tenured CO2 enhanced oil recovery (EOR) operation with 83+ years of continuous production since 1943. Operated by Denbury Onshore (now part of ExxonMobil), the field produced 49,508 barrels of oil in January 2026 across 46 historic wells. CO2 supply from the Jackson Dome pipeline system is the primary constraint on production economics, and many mineral interests are multi-generational inherited ownership.

## Key Takeaways

- Heidelberg East field has produced continuously since 1943 (83+ years), with 46 historic wells currently operated by Denbury Onshore
- Recent monthly production reached 49,508 barrels of oil (January 2026), making it one of the highest-rate CO2 EOR fields in Mississippi
- Denbury Onshore operates the field as part of the Jackson Dome CO2 EOR portfolio, with CO2 supplied via the "Green Pipeline" / NEJD CO2 system
- Mississippi's top 20 producing fields collectively generate approximately 237,000 barrels per month — roughly one-third the production volume of Texas's top 20 fields
- Mineral interests are commonly multi-generational inherited ownership, with many heirs located out-of-state
- Valuation factors include 3–8% annual decline rates, 15–30+ year remaining reserve life, and 9–13% discount rates for stable unitized cash flows
- CO2 supply from Jackson Dome is the binding economic constraint on long-term EOR economics and reserve life projections
- Buckhead Energy purchases mineral rights and royalty interests remotely, with the entire transaction handled without in-person meetings

## Page Highlights

**Field Overview:** Heidelberg East is a mature oil field in Jasper County, Mississippi, with continuous production since 1943. Denbury Onshore (acquired by ExxonMobil in 2023) operates the field using CO2 enhanced oil recovery technology, with supply from the Jackson Dome CO2 pipeline system.

**Mississippi Production Context:** Mississippi's top producing fields are dominated by long-life waterflood and CO2 EOR operations. The state's production is concentrated in fields supplied by Denbury's Jackson Dome CO2 system, with aggregate production substantially smaller than comparable Texas operations.

**Mineral Interest Types:** Common ownership forms include producing royalty interests (revenue share from active wells), non-producing mineral interests (fee ownership outside active zones), overriding royalty interests (carved from working interests), and non-participating royalty interests (royalty without leasing rights).

**Valuation Methodology:** Direct buyers use discounted cash flow models incorporating field-specific decline rates (3–8% annually), remaining reserve life (15–30+ years), operator quality, CO2 supply constraints, and discount rates (9–13%). The Jackson Dome CO2 supply constraint is a critical factor in long-term economic projections.

**Sales Process:** Buckhead Energy handles remote transactions for out-of-state owners, providing free written offers, remote notarization, deed recording with Jasper County, and same-day wire transfers upon recording.

## Related Topics

- [How to Sell Mineral Rights](https://www.buckheadenergy.com/sell)
- [What Are My Minerals Worth?](#) (linked from page)
- [Should I Sell?](#) (linked from page)
- [Beginner's Guide](#) (linked from page)
- [Getting a Fair Price](#) (linked from page)

---

**About Buckhead Energy**  
Buckhead Energy is a direct buyer of mineral rights and royalty interests with 18+ years of experience. We provide fair, transparent offers and handle the entire transaction process remotely.

**Ready to sell your mineral rights?** [Get a free, no-obligation valuation today →](https://www.buckheadenergy.com/sell)