| Title | Unlocking Geothermal Potential: Permitting Pathways for Repurposing Abandoned Oil and Gas Infrastructure |
|---|---|
| Authors | Saeed Salehi, Cesar Vivas, Jeff McCaskill, Runar Nygaard, Zeming Hu |
| Year | 2026 |
| Conference | World Geothermal Congress |
| Keywords | |
| Abstract | With growing global energy demands and heightened environmental concerns, renewable energy sources like geothermal energy are gaining increasing attention. However, the oil and gas (O&G) industry faces significant challenges in adopting green energy solutions due to cost, infrastructure limitations, and the complexities of environmental compliance. Additionally, thousands of inactive oil and gas wells require ongoing maintenance and eventual plugging, posing regulatory and financial burdens on operators. This case study outlines the permitting and regulatory processes involved in converting two inactive O&G wells in Tuttle, Oklahoma, into a direct-use geothermal energy system. The project seeks to extract geothermal heat from the Haskell Formation at a depth of approximately 6,500 feet, where subsurface temperatures reach around 135°F. The energy will provide sustainable heating for local public schools, reducing dependence on conventional, high-emission energy sources. Key to the project's viability is navigating Oklahoma’s regulatory framework, particularly with respect to well repurposing, underground injection control (UIC) permits, and operational safety standards. The Anadarko Basin, characterized by a geothermal gradient of 1.57°F per 100 feet, offers a favorable setting for geothermal development. The project utilizes two existing wells. This project illustrates a clear permitting pathway for converting end-of-life hydrocarbon assets into clean energy systems, aligning environmental stewardship with energy innovation. It offers a replicable model for similar geothermal repurposing projects nationwide. |