Tejon Treating and Carbon Solutions LLC has finalized the Phase 2 expansion of its Mongoose amine treating plant and associated gas gathering network to accommodate rising production of sour gas by third-party producers in the Midland basin of the West Texas Permian (OGJ Online, Feb. 12, 2024).
Completed as of May 29, the Phase 2 expansion included increasing capacity of the Mongoose amine treatment plant in Westbrook, Mitchell County, Tex., by 53 MMcfd from its Phase 1 capacity of 17 MMcfd, Tejon said.
As part of the expansion project, Tejon confirmed it also added multiple downstream delivery points, including connection to a new substation in Howard County, Tex., that enables 100% electrification of the Mongoose plant and its associated compressor station, both of which will contribute to reduced emissions along the system.
With the completed expansion, Tejon now operates more than 90 miles of pipeline and 70 MMcfd of amine treating capacity to handle sour gas volumes it receives from multiple Midland basin producers that collectively represent more than 137,000 dedicated acres, the midstream provider said.
The newly completed Phase 2 growth project “reflects the strong need for reliable sour gas gathering and treating infrastructure in this region of the Midland [b]asin,” said Mike Solomon, Tejon’s president.
“With new plant capacity, expanded takeaway options, and electrified operations, we are uniquely positioned to fill a much-needed gap in the market as the sole sour gas treating plant in this region,” Solomon added.
Formed in 2023 by Bayswater Management Co. LP and Bayswater Exploration & Production (E&P) LLC, Denver, Tejon previously operated the Mongoose gas plant to exclusively accommodate production from Bayswater E&P’s 35,000 dedicated acres, according to the company’s website.
Linked to the Mongoose plant, affiliate Bayswater Operating Co. LLC (Bayswater) also operates an acid gas injection (AGI) well (AGI #1) in Mitchell County that was permitted by the Texas Railroad Commission (TRRC) in March 2023 for injection of up to 6.9 MMcfd of CO2 and H2S into the Ellenburger formation at a depth of 8,300-9,000 ft with a maximum allowable surface pressure of 2,500 psig.
To accommodate the Phase 2 expansion, Bayswater Operating in second-half 2024 was seeing TRRC approval to increase the permitted maximum quantity of injected treated acid gas into AGI #1 by 12.6 MMcfd from the original permit to 19.5 MMcfd for a duration of about 40 years, according to a September 2024 filing with the US EPA.
To accommodate anticipated production growth in the region, the operator also is currently in the process of performing front-end engineering and design studies for the addition of a third treatment train (Phase 3) at the Mongoose gas plant, Tejon said on its website.
Further details regarding the AGI #1 and Train 3 expansions, however, have yet to be disclosed.
Both EPA and TRRC documents list Bayswater Operating as direct owner of the Mongoose gas treatment plant and the associated AGI #1.
