Some aspects of increase of liquid hydrocarbons removal from underground gas storage tanks built in depleted gas-condensate fields
It is commonly known that one of gas storage methods is building of gas-condensate underground storage tanks. Some of these storage tanks are built in depleted gas-condensate fields. When pumping gas into these reservoirs with the purpose of its further removal, the old methods applied don’t allow its complete removal. The article suggests a two-stage method of such wells operation. The first stage envisages dry gas injection into the upper layers of formations and the second stage realizes gas and the remaining gas-condensate removal from the lower layers of the reservoir. The proposed method will allow increasing the oil recovery from a formation at the expense of the remaining condensate removal, located in the lower layers of the reservoir.