There are approximately 250,000 tank batteries in, the U.S. Tank vent gas results from flash, standing, and working losses. Between 8,000 and 10,000 mechanical vapor-recovery units (VRUs) are installed at oil production sites, with four-tanks typically connected to each VRU. Most of these tanks are fixed-roof storage tanks. This, project demonstrated the use of an alternative method for handling low-pressure natural gas that typically is vented to the atmosphere, flared, or recovered with a mechanical compressor at oil and gas production facilities. This application uses a venturi jet ejector to compress natural-gas vapors from crude-oil and water storage tanks to an intermediate pressure for use at the location or, ultimately, delivery,into the sales pipeline.