The paper deals with the effect of pressure and temperature fluctuation characteristic in underground gas storage facilities on gas permeability of natural sandstone cores. Primary aim of the laboratory studies was to develop an appropriate method which might simultaneously restrict water imbibition and improve rock stability in vicinity of both producing and injection gas wells. The hypothetical method is based on hydrophobization of rock surface by different silicone compounds and asphaltenes or asphaltene-containing natural hydrocarbons. The paper provides new information for behavior of treated and non-treated cores, particularly for their gas permeability as a function of cycle number, absolute gas permeability and type of treating agents. It is also demonstrated that water content (saturation) of the porous media fundamentally influences the adsorption of asphaltenes, and hence, the efficiency of hydrophobization, wettability alteration. Despite substantial progress in the topic, some questions remained open and these "white spots" must be answered if a reliable and efficient well treatment methods should be developed for stabilization of gas wells operating in gas fields and underground gas storage facilities.

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