LaBarge

The Shute Creek carbon storage project is a large-scale acid gas injection and geologic sequestration operation operated by ExxonMobil at the Shute Creek Treating Facility (SCTF) in the LaBarge field of southwestern Wyoming within the Green River Basin. The project manages sour gas produced from the Madison Formation, which contains unusually high concentrations of carbon dioxide and hydrogen sulfide. After natural gas processing, residual acid gas streams consisting primarily of CO₂ and H₂S are injected into deep subsurface formations through Class II injection wells to safely dispose of and permanently store these gases. Injection operations began in 2005 and are expected to continue through the life of the field, potentially extending into the next century, with total modeled geologic storage estimated at approximately 37 million tonnes of CO₂. Injection occurs at very deep intervals within the Madison reservoir system, where thick regional confining layers provide long-term containment. ExxonMobil forecasts approximately 180 million metric tonnes of CO₂ will be stored in the dedicated CO₂ injection wells (SC 5-2 and SC 7-34) over the modeled injection period under the 2025 MRV plan. Legacy acid gas injection wells AGI 2-18 and AGI 3-14 are estimated to inject roughly ~30–35 MMSCFD of acid gas per well (approximately ~10–18 MMSCFD CO₂ equivalent depending on composition), with combined modeled storage capacity of approximately ~37–53 million tonnes CO₂. Together, the Shute Creek sequestration system represents a large-scale CO₂ storage complex integrating both acid gas disposal and dedicated CO₂ sequestration wells.