Piñon Midstream LLC has placed its 85-MMcfd Delaware basin greenfield sour-gas treating and carbon capture site (Dark Horse) and associated pipelines, compressor stations, and acid gas sequestration infrastructure into service, with the initial capacity fully subscribed. Dark Horse is in Lea County, NM, and captures and sequesters both carbon dioxide (CO2) and hydrogen sulfide (H2S).
Dark Horse infrastructure includes a centralized amine treating plant (Plant 1), an 18,000-ft deep acid gas sequestration well (Independence AGI #1), 40,000 hp of field and plant compression, and 30 miles of high-pressure gathering and redelivery pipelines. The site is expandable to treat as much as 400 MMcfd of sour gas.
Piñon expects to complete work on its second amine treating plant (Plant 2) this month. The plant will increase Dark Horse’s treating capacity to 170 MMcfd.
Independence AGI #1 is New Mexico’s deepest and largest acid gas injection well, according to Piñon, with the capacity to permanently sequester up to 175,000 tons/year of CO2 and 75,000 tons/year of H2S. Sequestration capacity will double when Independence AGI #2 well is completed and placed into service in 2022.