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A method for pre-emptively reducing the production of water in an oil and gas well is provided. In one embodiment, a drill-in fluid having a relative permeability modifier (RPM) capable of impeding the production of water is introduced into the wellbore during drilling operations. In a second embodi

A method for pre-emptively reducing the production of water in an oil and gas well is provided. In one embodiment, a drill-in fluid having a relative permeability modifier (RPM) capable of impeding the production of water is introduced into the wellbore during drilling operations. In a second embodiment, a completion fluid having a relative permeability modifier (RPM) capable of impeding the production of water is introduced into the wellbore during completion operations. The drill-in fluid or completion fluid may further include an organosilicon compound to increase flow resistance and extend the effective RPM permeability application range.

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1. A method for pre-emptively reducing the production of water in an oil or gas well, comprising: (a) preparing a drill-in fluid comprising a relative permeability modifier (RPM) capable of impeding the production of water;(b) circulating the drill-in fluid in the well while drilling through the pro

1. A method for pre-emptively reducing the production of water in an oil or gas well, comprising: (a) preparing a drill-in fluid comprising a relative permeability modifier (RPM) capable of impeding the production of water;(b) circulating the drill-in fluid in the well while drilling through the production zone of a subterranean formation penetrated by the well and flowing the drill-in fluid into the drilled production zone;(c) binding the RPM to pore surfaces of the subterranean formation within the drilled production zone and forming a filter cake prior to the onset of water production; and(d) reducing water production in the well while maintaining or enabling an increase in the production of hydrocarbons from the wellwherein steps (a), (b) and (c) occur prior to producing oil or gas from the well. 2. The method of claim 1, wherein the concentration of the RPM in the drill-in fluid is between from about 100 ppm to about 80,000 ppm. 3. The method of claim 1, wherein the concentration of the RPM in the drill-in fluid is between from about 500 ppm to about 20,000 ppm. 4. The method of claim 1, wherein the formation permeability in the oil or gas well is between from about 0.1 to about 10,000 md. 5. The method of claim 1, wherein the drill-in fluid further comprises an organosilicon compound. 6. The method of claim 1, wherein the RPM has a molecular weight between from about 50,000 to about 20,000,000 g/mole. 7. The method of claim 6, wherein the RPM has a molecular weight between from about 100,000 to about 5,000,000 g/mole. 8. The method of claim 6, wherein the RPM has a molecular weight between from about 250,000 to about 2,000,000 g/mole. 9. The method of claim 1, wherein the RPM is derived from acrylamide. 10. The method of claim 9, wherein the RPM is a homopolymer or copolymer of acrylamide which has been sulfonated or quaternized. 11. The method of claim 7, wherein the RPM is a copolymer of acrylamide and at least one monomer is selected from acrylic acid, (meth)acrylic acid, dimethyldiallylammonium chloride, acrylamidoethyltrimethylammonium chloride, methacrylamidoethyltrimethylammonium chloride, acrylamidomethylpropanesulfonic acid, N-vinyl pyrrolidone, N-vinyl formamide, N-vinyl acetamide, N-vinylmethylacetamide, acrylamidoethyltrimethylammonium chloride, vinyl sulfonic acid, maleic acid, itaconic acid, styrene sulfonic acid, vinylsulfonic acid, methylenebisacrylamide and vinylphosphonic acid and sulfonate monomers thereof. 12. The method of claim 1, wherein the RPM is a polyvinyl alcohol or polysiloxane. 13. The method of claim 12, wherein the polyvinyl alcohol has a degree of hydrolysis between from about 50% to about 100%. 14. The method of claim 1, wherein the RPM is a hydrophilic polymer selected from natural gums and a chemically modified derivative thereof. 15. The method of claim 14, wherein the RPM is guar, carrageenan, gum Arabic, gum ghatti, karaya, tragacanth, pectin, starch, locust bean gum, scleroglucan, tamarind, xanthan gums or a hydroxyethyl, hydroxypropyl, hydroxypropylcarboxymethyl, hydroxyethylcarboxymethyl, carboxymethyl or methyl cellulose derivative. 16. A method for pre-emptively reducing the production of water in an oil or gas well, comprising: (a) preparing a drill-in fluid comprising a relative permeability modifier (RPM) capable of impeding the production of water;(b) circulating the drill-in fluid in the well while drilling through the production zone of a subterranean formation penetrated by the well and contacting flow pathways in the subterranean formation in the drilled production zone with the drill-in fluid;(c) depositing a filter cake at the surface of the production zone of the subterranean formation prior to the onset of water production; and(d) impeding water production in the wellwherein steps (a), (b), (c) and (d) occur prior to producing oil or gas from the well. 17. The method of claim 16, wherein the concentration of the RPM in the drill-in fluid is between from about 100 ppm to about 80,000 ppm. 18. The method of claim 16, wherein the RPM is a copolymer of acrylamide and at least one monomer is selected from acrylic acid, (meth)acrylic acid, dimethyldiallylammonium chloride, acrylamidoethyltrimethylammonium chloride, methacrylamidoethyltrimethylammonium chloride, acrylamidomethylpropanesulfonic acid, N-vinyl pyrrolidone, N-vinyl formamide, N-vinyl acetamide, N-vinylmethylacetamide, acrylamidoethyltrimethylammonium chloride, vinyl sulfonic acid, maleic acid, itaconic acid, styrene sulfonic acid, vinylsulfonic acid, methylenebisacrylamide and vinylphosphonic acid and sulfonate monomers thereof. 19. The method of claim 16, wherein the RPM is guar, carrageenan, gum Arabic, gum ghatti, karaya, tragacanth, pectin, starch, locust bean gum, scleroglucan, tamarind, xanthan gums or a hydroxyethyl, hydroxypropyl, hydroxypropylcarboxymethyl, hydroxyethylcarboxymethyl, carboxymethyl or methyl cellulose derivative. 20. The method of claim 16, wherein the RPM is a polyvinyl alcohol or polysiloxane. 21. The method of claim 16, wherein the drill-in fluid further comprises an organosilicon compound.