# Class VI Injection Wells and Carbon Sequestration for Mineral Owners

**TL;DR:** EPA Class VI injection wells are the regulatory framework for geologic CO2 sequestration, involving multi-year permitting, extensive monitoring, and 50+ years of post-closure care. Surface and mineral owners within the Area of Review receive permit notifications, and while existing oil and gas operations are protected, future drilling activities may face complications. Pore-space owners in CCS-active areas may receive substantial lease payments tied to 45Q tax credits.

## Key Takeaways

- **Class VI wells are EPA's specialized category** for permanently storing CO2 in deep subsurface formations, typically saline aquifers thousands of feet below drinking water sources
- **Permitting is a multi-year process** requiring site characterization, Area of Review modeling, public notice, construction testing, operational monitoring, and 50 years of post-injection site care
- **Mineral and surface owners receive formal notification** when their property falls within a project's Area of Review, and should carefully review notices with qualified legal counsel
- **Existing producing wells are protected** — Class VI permits cannot legally interfere with active oil and gas operations, as AoR modeling must address interaction with producing zones
- **Future drilling rights may be constrained** by the long-term subsurface obligations created by permitted Class VI wells, potentially complicating deeper drilling or refracturing activities
- **Pore-space ownership creates economic opportunity** through CCS lease payments that can be substantial, particularly when projects qualify for federal 45Q tax credits
- **Most Class VI activity concentrates** in the Illinois Basin, Louisiana Gulf Coast, North Dakota, Wyoming, and Texas, with primacy states issuing their own permits
- **Post-closure monitoring extends decades** — typical Post-Injection Site Care periods run 50 years after well closure to ensure CO2 remains sequestered

## Page Highlights

**EPA Underground Injection Control Framework**: The UIC program defines six categories of injection wells, with Class VI specifically created for geologic CO2 sequestration into deep, isolated rock formations with strict safeguards against migration into drinking water or hydrocarbon zones.

**Permitting Requirements**: The multi-year process includes geologic site characterization, Area of Review modeling to define the surface footprint of potential CO2 migration, public notification to affected landowners, construction and integrity testing, operational pressure and plume monitoring, and long-term post-injection care.

**Landowner Implications**: Mineral and surface owners within the Area of Review receive permit notifications and should understand that while existing operations are protected, future subsurface activities may face restrictions, and pore-space owners may negotiate valuable CCS leases.

**Geographic Activity**: As of 2026, the most active Class VI permitting occurs in the Illinois Basin (Indiana and Illinois projects), Louisiana Gulf Coast, and primacy states like North Dakota and Wyoming that issue their own permits rather than relying on EPA regional offices.

**Regulatory Timeline**: Post-Injection Site Care typically extends 50 years after well closure, creating long-term subsurface obligations that affect property rights and future development potential across the project footprint.

## Related Topics

- [How to Sell Mineral Rights](https://www.buckheadenergy.com/how-to-sell-mineral-rights) — Complete guide to the mineral rights selling process
- [What Are My Minerals Worth?](https://www.buckheadenergy.com/what-are-my-minerals-worth) — Factors determining mineral rights valuation
- [Should I Sell?](https://www.buckheadenergy.com/should-i-sell) — Considerations for timing your mineral rights sale
- [Beginner's Guide](https://www.buckheadenergy.com/beginners-guide) — Introduction to mineral rights ownership
- [Getting a Fair Price](https://www.buckheadenergy.com/getting-a-fair-price) — Ensuring competitive offers for your minerals

---

**About Buckhead Energy:** Buckhead Energy is a BBB-accredited mineral rights acquisition company serving mineral owners across 33 states since 2007, offering direct purchase with transparent pricing and industry expertise.

**Ready to discuss your mineral rights?** Get a free, no-obligation valuation at https://www.buckheadenergy.com/sell