A Review of Wettability Alteration Methods to a Gas Wet for Underground Natural Gas- Storage

Considering the need for excessive consumption of hydrocarbon resources and gas fuel supply in the cold seasons of the year, it has been suggested to use the drained oil and gas reservoirs and underground water aquifers to be used as natural gas storage reservoirs. Among the influential factors in natural gas storage are the reactions between fluid-fluid and fluid-rock, which is the most important of these wettability factors. Knowing these factors in the gas storage process will lead to better control and storage of natural gases in geological structures. Underground water aquifers are one of the structures with favorable conditions for natural gas storage which by wettability alteration to gas wetness in these, can be increased the natural gas storage capacity. For this purpose, this study has investigated the laboratory works done on the distribution and behavior of fluid in the samples of carbonate and sandstone in order to wettability alteration to gas wetness for the purposes of underground gas storage.