ABSTRACT
The adsorption–desorption surface chemistry principles of gases on solid surfaces have been investigated in the literature. The science of surface chemistry has been applied in various technologies such as geology, geophysics, geochemistry, hydrology, reservoir engineering, petroleum exploration, biochemistry, paper and ink, and cleaning and polishing. The surface chemistry aspects have been recognized to be helpful in understanding the fundamental forces involved in gas recovery. For instance, in the case of a shale gas reservoir, one may depict this system as Different Surface Phases in a Shale Gas Reservoir: Solid Phase—Liquid Phase Gas Phase. Gas desorption is dependent on the equilibrium between the adsorbed and desorbed states of the system. Surface tension is the differential change of free energy with change of surface area. From surface chemistry principles, this means that the fracture formation energy is related to the surface force.
