# Enhanced Oil Recovery (EOR) Fields and Mineral Rights

## TL;DR

Enhanced Oil Recovery (EOR) extends mature oil field production by 20-30 years using CO2 flooding, waterflooding, chemical injection, or thermal methods to extract an additional 10-20% of original oil in place. Mississippi leads the nation in CO2 EOR thanks to the Jackson Dome natural CO2 source, while Texas's Permian Basin hosts the largest EOR production volume. EOR operations create extended royalty streams for mineral owners and are increasingly tied to Carbon Capture, Utilization, and Storage (CCUS) projects that generate additional revenue through federal 45Q tax credits.

## Key Takeaways

- **EOR recovers 10-20% additional oil** after primary and secondary methods are exhausted, extending field life by 20-30 years and creating secondary production peaks that renew royalty income
- **Mississippi is the national CO2 EOR leader** with the Jackson Dome natural CO2 source feeding a 925-mile pipeline network serving Tinsley, Heidelberg, Little Creek, Cranfield, and other major fields
- **ExxonMobil acquired all Mississippi EOR infrastructure** in 2023 through its $4.9 billion Denbury Resources purchase, signaling long-term commitment to the region
- **Permian Basin hosts the largest U.S. EOR volume** with CO2 sourced from Colorado's McElmo Dome and transported via Kinder Morgan's 1,500+ mile pipeline network to fields like SACROC, Wasson, and Seminole
- **CCUS creates dual revenue streams** through federal 45Q tax credits ($60/ton for EOR use, $85/ton for dedicated storage) plus oil production, fundamentally changing EOR economics
- **Pore space rights are separate from mineral rights** in most states—surface owners typically control subsurface CO2 storage rights, creating complex legal considerations
- **EOR fields command premium valuations** due to predictable long-term production, established infrastructure, and major operator commitment, though production rates are lower than unconventional plays
- **Existing unit agreements govern EOR economics** including cost allocation, royalty calculations, and CO2 cost recovery, making lease review essential before acquisition

## Page Highlights

**What Is Enhanced Oil Recovery?** — EOR refers to tertiary recovery techniques that extract remaining oil after primary (natural pressure) and secondary (waterflooding) methods are exhausted, typically recovering only 20-40% of original oil in place. The four main EOR methods are CO2 flooding (most common in U.S.), waterflooding (oldest and most widespread), chemical flooding (surfactants/polymers), and thermal/steam injection (for heavy oil).

**Mississippi EOR Leadership** — Mississippi leads the nation in CO2 EOR due to the Jackson Dome natural CO2 reservoir near Jackson, which feeds a 925-mile pipeline network eliminating costly industrial capture. Key fields include Tinsley (Yazoo County), Heidelberg (Jasper County), Little Creek and Mallalieu (Lincoln County), Cranfield (Adams County, also a major CCUS research site), and McComb (Pike County). ExxonMobil's 2023 acquisition of Denbury Resources gave them control of the entire Mississippi CO2 infrastructure.

**Texas Permian Basin Operations** — Texas hosts the largest EOR production volume in the U.S., concentrated in Permian Basin fields including SACROC Unit (Scurry County, one of the world's first large-scale CO2 floods since 1970s), Wasson Field (Yoakum/Gaines Counties), Seminole Unit, Salt Creek Field, Means Field, and North Ward Estes. Occidental Petroleum is the largest CO2 EOR operator in the Permian, and Kinder Morgan operates 1,500+ miles of CO2 pipeline moving 1.3 billion cubic feet per day from Colorado sources.

**Wyoming, Oklahoma & Kansas EOR** — Wyoming has significant EOR history in the Big Horn Basin and Powder River Basin, with Salt Creek Field (Natrona County) serving as a long-term EOR testing ground. Oklahoma has select waterflood and CO2 pilot projects in the Anadarko Basin and Sooner Trend. Kansas operates active waterflood operations in central Kansas uplift and Hugoton area fields, with some CO2 and chemical flood experiments.

**CCUS Integration** — Carbon Capture, Utilization, and Storage creates dual revenue streams through federal 45Q tax credits (currently $60/ton for EOR use, $85/ton for dedicated geological storage) while producing additional oil. Industrial CO2 capture from power plants and ethanol facilities is opening new regions to EOR where natural CO2 sources don't exist. Pore space rights (typically owned by surface owners, not mineral owners) are becoming increasingly valuable as CCUS expands.

**Mineral Rights Valuation Impacts** — EOR operations extend field life by 20-30 years, creating secondary production peaks that can approach original primary production rates before settling into long gradual decline. Infrastructure stability (major pipelines, processing facilities, experienced operators) reduces operational risk. EOR fields command premium valuations due to predictable long-term production despite lower per-well rates compared to unconventional plays. Existing unit agreements govern cost allocation, royalty calculations, and CO2 cost recovery terms.

**Due Diligence Considerations** — Mineral owners should review unit agreements for EOR cost allocation provisions, CO2 cost recovery clauses, and waterflood vs. tertiary royalty treatment. Field-specific questions include EOR method type, operator identity, infrastructure proximity, remaining oil in place estimates, production history trends, planned expansion phases, and CCUS participation potential. State-specific regulations (particularly Mississippi's favorable EOR regulatory framework) significantly impact operations.

**Market Outlook** — Long-term oil demand expectations support continued EOR investment despite energy transition concerns. CCUS policy support through tax credits and carbon markets strengthens EOR economics. Operator consolidation (like ExxonMobil's Denbury acquisition and Occidental's Permian dominance) indicates major companies view EOR as strategically valuable. New CO2 sources from industrial capture are expanding geographic reach beyond traditional natural CO2 regions.

## Related Topics

- [Mississippi EOR & CCUS Basin Guide](https://www.buckheadenergy.com/mississippi-eor-ccus)
- [Texas Mineral Rights Guide](https://www.buckheadenergy.com/texas-mineral-rights)
- [Wyoming Mineral

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