Gillis Amine Treatment: Largest in the US at 8,000 gal/min

Client:

Momentum Midstream

Project summary:

At the central treating hub for its New Generation Gas Gathering (NG3) project, Momentum Midstream required high-capacity amine treatment. The 1.75-Bscf/d Gillis plant required both operational reliability and flexibility to support the broader NG3 system in tapping the Haynesville Shale for LNG export and carbon capture.

Opero Energy brought proven amine expertise and fabrication experience to design and deliver an 8,000-gal/min amine treatment system, the largest ever in the US.

Front-end details + collaboration

Early in the project, our team supported key technology and process decisions, provided CAPEX/OPEX optimization options, and developed front-end engineering that reduced downstream execution risks. This collaborative early-phase involvement positioned Gillis for efficient engineering, procurement, and fabrication.

Equipment modularization + long-lead sequencing

With 112 pieces of equipment across the site, Opero Energy modularized the many large and complex process units, as well as tight coordination among engineering, fabrication, and procurement teams. Opero Energy applied careful sequencing and disciplined execution to maintain the project’s schedule.

Impressive speed to market for landmark amine capacity

Equipment for the Gillis plant was engineered and fabricated in house at the Opero Energy shop in Houston, Texas, enabling quick transport and streamlined site integration.

After commissioning and startup, the massive Gillis plant began treating natural gas in under 2 years from the engineering and fabrication contract award. This timeline represents a major accomplishment in modern, integrated project services for large-scale energy delivery.

Project overview:

• Greenfield treatment plant for 1.75-Bscf/d natural gas
• (2) 4,000-gal/min amine regen trains
• (10) process towers
• (30) pressure vessels + filters
• (15) integrated skids
• LNG-ready CO2 specificiations