Dry gas injected to the subsurface reservoir via gas injectors to support reservoir pressure and improve oil displacement
The source of Dry gas is usually a processed solution gas produced from oil reservoir which is more economic to reinject to support the oil offtakes rather than sell it on the market.
See also
Natural Science / Physics / Chemistry / Chemical Substance / Water
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum reservoir fluids