The invention discloses a soluble alkaline salt scale inhibitor and a preparation method thereof, and belongs to the technical field of oilfield
chemistry. The soluble alkaline salt scale inhibitor is prepared from amphiphilic modified
graphene oxide, a surfactant, inorganic salt and deionized water, the amphiphilic modified
graphene oxide contains a large amount of carboxyl groups,
sulfonic acid groups, hydroxyl groups and the like, and has good
metal ion chelating property; meanwhile, through the hydrophobic association effect and
hydrogen-bond interaction between modified
graphene grafted long carbon chains, the bonding probability between
sodium ions of the soluble
saline-
alkali salt and
bicarbonate radicals,
carbonate radicals and
chloride ions is further weakened, and through the synergistic effect of the amphiphilic modified graphene
oxide, the surfactant and the inorganic salt, the salt scale inhibition effect is further improved; the method is especially suitable for soluble
alkali salt water quality conditions of high temperature, high alkali and high
salinity, can solve the problems of oilfield water injection, fracturing flowback strata and
wellbore salt deposition, and has a good popularization prospect.