The invention relates to the technical field of drag
reducer preparation, and in particular to a method for producing a salt-resistant drag
reducer for
oil well fracturing. S1.1, weighing the following raw materials in parts by weight: 27-32 parts by weight of a modified
polymer, 0.6-1.1 parts by weight of a cross-linking agent, 0.1-0.3 parts by weight of an
antioxidant, 2-6 parts by weight of an acetate buffer, 0.6-0.8 parts by weight of a surfactant, 0.02-0.04 parts by weight of a
benzalkonium chloride biocide, and 0.2-0.4 parts by weight of a
bentonite suspending agent; wherein, the modified The
polymer is prepared by copolymerization of
acrylamide,
crotonic acid and
acrylic acid phosphonate in a
mass ratio of 7:2 to 4:10 to 13; S1.2, adding the above raw materials and continuously stirring to obtain a salt-resistant drag
reducer;
crotonic acid,
acrylic acid phosphonate and
acrylamide are used to prepare a modified
polymer, and carboxyl and phosphonic acid groups are introduced into the
polyacrylamide, thereby enhancing the water
solubility of the polymer and, at the same time, improving the coordination ability of the modified polymer with the
zirconium ions in the cross-linking agent, thereby improving the
salt resistance and drag reduction effect of the modified polymer.