Fluid loss control additives for drilling fluids

1 . A method for drilling a wellbore in a subterranean formation, the method comprises:

providing a drilling fluid comprising:

an aqueous base fluid,

a first fluid loss control additive that is a cross-linked polymer comprising N-vinylpyrrolidone as a monomer, and

a second fluid loss control additive that is a cross-linked copolymer comprising a first comonomer of 2-acrylamido-2-methylpropanesulfonic acid in a first comonomer concentration of at least 70 mol % of the copolymer; wherein the second fluid loss control additive additionally comprises a second comonomer comprising an N-vinyl amine-containing monomer, a terminal double bond-containing monomer, or a combination of an N-vinyl amine-containing monomer and a terminal double bond-containing monomer; wherein the second comonomer is present in a total second comonomer concentration of 30 mol % or less of the copolymer;

drilling a wellbore through at least a portion of a subterranean formation with the drilling fluid;

forming a filter cake with the drilling fluid; and

introducing a brine into the wellbore after the drilling fluid is introduced into the wellbore; wherein the brine comprises zinc, wherein the filter cake is capable of controlling fluid loss of the brine for at least 16 hours.

2 . The method of claim 1 , wherein the zinc-containing brine is a screen running fluid or a gravel packing fluid.

3 . The method of claim 1 , wherein the zinc-containing brine has a density of about 14 lb/gal to about 20 lb/gal.

4 . The method of claim 1 , wherein the subterranean formation comprises a reservoir comprising a hydrocarbon; wherein the wellbore is drilled through at least a portion of the reservoir; wherein the drilling fluid is circulated in the wellbore during the drilling of the reservoir.

5 . The method of claim 1 , wherein the second comonomer of the second fluid loss control additive is a comonomer selected from the group consisting of N-vinylpyrrolidone, N-vinylamides, acrylamide, methacrylamide, N-substituted acrylamides, N-substituted methacrylamides, acrylates, methacrylates, acrylic acid, methacrylic acid, N-allylamides, vinyl alcohol, vinyl ethers, vinyl esters, allyl alcohol, allyl ethers, allyl esters, vinylpyridine, vinyl sulfonates, allyl sulfonates, vinylimidazole, allylimidazole, allylamine, diallylamine, allyltrimethylammonium halide, diallyldimethylammonium halide, or any combination of comonomers.

6 . The method of claim 1 , wherein the second fluid loss control additive comprises a crosslinker selected from the group consisting of divinyl ether, diallyl ether, vinyl or allyl ethers of polyglycols or polyols, divinylbenzene, 1,3-divinylimidazolidin-2-one, divinyltetrahydropyrimidin-2(1H)-one, dienes, triallyl amine, triallyl alkylammonium halide, tetraallylammonium halide, tetraallylethylene diamine, N-vinyl-3(E)-ethylidene pyrrolidone, ethylidene bis(N-vinylpyrrolidone), and any combination thereof.

7 . A system for drilling a wellbore, the system comprises:

a drilling fluid comprising:

an aqueous base fluid,

a first fluid loss control additive that is a cross-linked polymer comprising N-vinylpyrrolidone as a monomer, and

a second fluid loss control additive that is a cross-linked copolymer comprising a first comonomer of 2-acrylamido-2-methylpropanesulfonic acid in a first comonomer concentration of at least 70 mol % of the copolymer; wherein the second fluid loss control additive additionally comprises a second comonomer comprising an N-vinyl amine-containing monomer, a terminal double bond-containing monomer, or a combination of an N-vinyl amine-containing monomer and a terminal double bond-containing monomer; wherein the second comonomer is present in a total second comonomer concentration of 30 mol % or less of the copolymer;

a zinc brine configured to be introduced into the wellbore after the drilling fluid is introduced into the wellbore;

mixing equipment configured to mix the aqueous base fluid, the first fluid loss control additive, and the second fluid loss control additive; and

pumping equipment configured to pump the drilling fluid and the zinc brine in the wellbore; wherein the zinc brine is pumped after the drilling fluid,

wherein the drilling fluid forms a filter cake, and wherein the filter cake is capable of controlling fluid loss of the zinc brine for at least 16 hours.

8 . The system of claim 7 , further comprising a drill string and a drill bit; wherein the drilling fluid is pumped through the drill string and the drill bit.

9 . The system of claim 7 , wherein the first fluid loss control additive is a homopolymer of cross-linked polyvinylpyrrolidone.

10 . The system of claim 7 , wherein the second comonomer of the second fluid loss control additive is selected from the group consisting of N-vinylpyrrolidone, N-vinylamides, acrylamide, methacrylamide, N-substituted acrylamides, N-substituted methacrylamides, acrylates, methacrylates, acrylic acid, methacrylic acid, N-allylamides, vinyl alcohol, vinyl ethers, vinyl esters, allyl alcohol, allyl ethers, allyl esters, vinylpyridine, vinyl sulfonates, allyl sulfonates, vinylimidazole, allylimidazole, allylamine, diallylamine, allyltrimethylammonium halide, diallyldimethylammonium halide, or any combination of comonomers.