The Challenge
Oil and gas storage tanks vent methane as vaporized hydrocarbons are released during normal production and storage, with emissions fluctuating as tank pressures and flow rates change. These dynamic conditions make vent control difficult and increase the risk of vacuum or overpressure events, while maintaining blanket gas integrity and integrating with existing site controls remains critical. Uncontrolled venting also results in lost gas value and increased exposure to carbon pricing.
The Solution
Spartan Controls implemented two LCO Vapor Recovery Units (VRUs) to capture methane emissions from oil and gas production tanks while maintaining stable tank pressure under fluctuating flow conditions. The VRUs automatically responded to changing vent rates, preventing vacuum or overpressure events and preserving blanket gas integrity. Full integration with the site’s Allen‑Bradley PLC ensured reliable, optimized operation without process disruptions.
The solution also converted previously vented gas into a usable resource. Recovered vapors were redirected for on‑site heat generation or recompressed for sale, eliminating atmospheric venting while delivering measurable carbon and fuel gas savings.
The solution also converted previously vented gas into a usable resource. Recovered vapors were redirected for on‑site heat generation or recompressed for sale, eliminating atmospheric venting while delivering measurable carbon and fuel gas savings.
The Value
Following installation, the site achieved clear environmental and economic benefits:
- Methane emissions from tank venting were eliminated, significantly reducing greenhouse gas emissions
- Over $246,000 in carbon tax savings projected over 10 years
- Annual fuel gas savings of $7,070 by 2034 through recovered gas reuse
- Zero process upsets, with no vacuum conditions or vented gas observed after startup