A method and system for flooding a subsea pipeline includes a high pressure/low flow pump in fluid communication with a jet pump, which pumps a pig through the subsea pipeline.

Using a liquid in a liquid reservoir corresponding to an interior volume of a pig terminal, the pig terminal enabled for fluid communication with a gas pipeline, a first liquid pump enabled for fluid communication with both the liquid reservoir and the pig terminal removes a gas from the interior volume of the pig terminal in response to the first liquid pump causing the gas to be hydraulically displaced from the pig terminal by the liquid from the liquid reservoir, while a recovery line enabled for fluid communication with the pig terminal is enabled to remove the gas from the pig terminal.