Formation permeability can be compromised by sludge deposits. NRG-MS inhibits the formation of sludge and emulsions that can occur during acidizing operations. During these operations, certain acids such as HCL acid solutions encounter crude oils. It is when the acid reacts to the oil that dense, asphaltene sludge deposits can form. NRG-MS prevents sludge formation, maintain formation permeability, and promotes rapid return of the treating fluid to the wellbore.