CI – MUS 11
Mutual solvent, commonly known as glycol ether, that is soluble in both hydrocarbon and aqueous solutions. As a mutual it is soluble in oil, acid and water.
It will effectively penetrate as deep in the formation as the treating fluid. It tends to dissolve the oil film on fines released by the reaction of the acid on the formation. This leaves the fines and formation pore surfaces water wet. Formations that are water wet have little tendency to stabilize emulsions.
It typically is used in acid stimulation applications as a surface tension reducer and water-wetting agent. The recommended concentration is 2%-20% in HCl acid systems.
This also helps to prevent excessive adsorption of surfactants and corrosion inhibitors by keeping them in solution.