From Liquipedia StarCraft 2 Wiki
- This article covers the current multiplayer version of this building. For another version see Refinery (Wings of Liberty and Heart of the Swarm).
The Refinery is the gas extraction building for Terran. When constructed on top of a Vespene Gas Geyser, it allows the Terran player to collect Vespene Gas by sending SCVs into it. SCVs collect 4 gas at a time and return it to the nearest Command Center until the geyser is depleted. Refineries can only be built on Vespene Gas Geysers and are the only way a Terran player can mine Vespene Gas.