Abstract: With the disclosed device, some or all of the available oil tank vent gas in a production system can be utilized to augment the primary fuel gas needed by a heater treater unit to separate the gas, oil, and water fractions from raw natural gas extracted at the wellhead. Augmenting the primary fuel gas with vent gas reduces the demand for primary fuel gas, which thereby increases the amount of gas traversing a meter. The disclosed device also provides for an auxiliary burner unit that can directly address any available oil tank vent gas that is not utilized to augment fuel gas as waste gas. A method and apparatus for reducing the venting of raw natural gas emissions from an oil storage tank is described.