Drill-in fluid compositions and methods

1. A drill-in slurry comprising:

(a) an aqueous base fluid;

(b) a solid particulate material comprising a metal salt, a metal oxide, or a metal hydroxide in an amount of about 5 wt. % to about 25 wt. %; and

(c) a hygroscopic chelating agent in a range of about 0.5 wt. % to about 5 wt. %;

wherein the chelating agent binds to at least one particle of the solid particulate material;

wherein the plastic viscosity of the drill-in slurry under standard conditions of about 20° C. and 101 kilopascal (kPa) is about 10 centipoise (cP) to about 75 cP and under harsh conditions of about 121° C. and about 3447 kPa is about 5 cP to about 50 cP; and

wherein the drill-in slurry is adapted for drilling through a reservoir section of a subterranean formation.

2. The drill-in slurry of claim 1 , wherein the solid particulate material comprises calcium carbonate.

3. The drill-in slurry of claim 1 , wherein the hygroscopic chelating agent comprises a polyamine.

4. The drill-in slurry of claim 3 , wherein the hygroscopic chelating agent comprises at least one compound of Formula (I):

or a salt thereof, wherein:

R 1 , R 2 and R 4 are independently selected from the group consisting of H, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, Cy 1 , C(O)R b , C(O)NR c R d , C(O)OR a , S(O) 2 R b , S(O) 2 NR c R d ; wherein the C 1-6 alkyl, C 2-6 alkenyl and C 2-6 alkynyl are each optionally substituted with 1, 2, 3, or 4 substituents independently selected from the group consisting of halo, Cy 2 , CN, NO 2 , OR a1 , SR a1 , C(O)R b1 , C(O)NR c1 R d1 , C(O)OR a1 , OC(O)R b1 , OC(O)NR c1 R d1 , NR c1 R d1 , NR c1 C(O)R b1 , NR c1 C(O)OR b1 , NR c1 C(O)NR c1 R d1 , NR c1 S(O) 2 R b1 , NR c1 S(O) 2 NR c1 R d1 , S(O) 2 R b1 , and S(O) 2 NR c1 R d1 ;

each R 3 , R 5a , R 5b , R 6a and R 6b is independently selected from the group consisting of H, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, Cy 1 , C(O)R b , C(O)NR c R d , C(O)OR a , S(O) 2 R b , S(O) 2 NR c R d and a group of formula (i):

wherein the C 1-6 alkyl, C 2-6 alkenyl and C 2-6 alkynyl are each optionally substituted with 1, 2, 3, or 4 substituents independently selected from the group consisting of halo, Cy 2 , CN, NO 2 , OR a1 , SR a1 , C(O)R b1 , C(O)NR c1 R d1 , C(O)OR a1 , OC(O)R b1 , OC(O)NR c1 R d1 , NR C1 R d1 , NR c1 C(O)R b1 , NR c1 C(O)OR b1 , NR c1 C(O)NR c1 R d1 , NR c1 S(O) 2 R b1 , NR c1 S(O) 2 NR c1 R d1 , S(O) 2 R b1 , and S(O) 2 NR c1 R d1 ;

or alternatively, when x is 1, 2, or 3, any two R 3 and R 5a groups together with the carbon atom to which R 5a is attached, the carbon atom to which R 6a and R 6b are attached and the nitrogen atom to which R 3 is attached form a 5-10 membered heterocycloalkyl, which is optionally substituted with 1, 2, or 3 independently selected R g substituents;

or alternatively, when n is an integer between 2 and 100, any two adjacent R 3 groups together with the nitrogen atoms to which they are attached, the carbon atom to which R 5a and R 5b are attached and the carbon atom to which R 6a and R 6b are attached form a 5-10 membered heterocycloalkyl, which is optionally substituted with 1, 2, or 3 independently selected R g substituents;

each R 7 , R 8 , R 9a , R 9b , R 10a and R 10b is independently selected from the group consisting of H, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, Cy 1 , C(O)R b , C(O)NR c R d , C(O)OR a , S(O) 2 R b , S(O) 2 NR c R d ; wherein the C 1-6 alkyl, C 2-6 alkenyl and C 2-6 alkynyl are each optionally substituted with 1, 2, 3, or 4 substituents independently selected from the group consisting of halo, Cy 2 , CN, NO 2 , OR a1 , SR a1 , C(O)R b1 , C(O)NR c1 R d1 , C(O)OR a1 , OC(O)R b1 , OC(O)NR c1 R d1 , NR c1 R d1 , NR c1 C(O)R b1 , NR c1 C(O)OR b1 NR c1 C(O)NR c1 R d1 , NR c1 S(O) 2 R b1 , NR c1 S(O) 2 NR c1 R d1 , S(O) 2 R b1 , and S(O) 2 NR c1 R d1 ;

or alternatively, when y is 1, 2, or 3, any two R 7 and R 9a groups together with the carbon atom to which R 9a is attached, the carbon atom to which R 10a and R 10b are attached and the nitrogen atom to which R 7 is attached form a 5-10 membered heterocycloalkyl, which is optionally substituted with 1, 2, or 3 independently selected R g substituents;

or alternatively, when m is an integer between 2 and 100, any two adjacent R 7 groups together with the nitrogen atoms to which they are attached, the carbon atom to which R 9a and R 9b are attached and the carbon atom to which R 10a and R 10b are attached form a 5-10 membered heterocycloalkyl, which is optionally substituted with 1, 2, or 3 independently selected R g substituents;

each n and m is independently an integer between 1 and 100;

each x and y is independently an integer between 0 and 10;

each Cy 1 and Cy 2 is independently selected from the group consisting of C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, 6-12 membered aryl, and 5-14 membered heteroaryl, each of which is optionally substituted with 1, 2, 3, or 4 substituents independently selected from R Cy ;

each R Cy is independently selected from the group consisting of C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, halo, CN, OR a2 , SR a2 , C(O)R b2 , C(O)NR c2 R d2 , C(O)OR a2 , OC(O)R b2 , OC(O)NR c2 R d2 , NR c2 R d2 , NR c2 C(O)R b2 , NR c2 C(O)OR a2 , NR c2 C(O)NR c2 R d2 , NR c2 S(O)R b2 , NR c2 S(O) 2 R b2 , NR c2 S(O) 2 NR c2 R d2 , S(O) 2 R b2 , and S(O) 2 NR c2 R d2 ; wherein the C 1-6 alkyl, C 2-6 alkenyl, and C 2-6 alkynyl are each optionally substituted with 1, 2, or 3 substituents independently selected from halo, CN, OR a3 , SR a3 , C(O)R b3 , C(O)NR c3 R d3 , C(O)OR a3 , OC(O)R b3 , OC(O)NR c3 R d3 , NR c3 R d3 , NR c3 C(O)R b3 , NR c3 C(O)OR a3 , NR c3 C(O)NR c3 R d3 , NR c3 S(O) 2 R b3 , NR c3 S(O) 2 NR c3 R d3 , S(O) 2 R b3 , and S(O) 2 NR c3 R d3 ;

each R a , R b , R c , R d , R a1 , R b1 , R c1 , R d1 , R a2 , R b2 , R c2 , R d2 , R a3 , R b3 , R c3 , and R d3 is independently selected from H, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, 6-12 membered aryl, and 5-14 membered heteroaryl; wherein each C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, 6-12 membered aryl, and 5-14 membered heteroaryl is optionally substituted with 1, 2, or 3 independently selected substituents R g ;

or alternatively, any R c and R d attached to the same N atom, any R c1 and R d1 attached to the same N atom, any R c2 and R d2 attached to the same N atom, and any R c3 and R d3 attached to the same N atom, together with the with the N atom to which they are attached, form a 4-6 membered heterocycloalkyl group or a 5-6 membered heteroaryl group, each optionally substituted with 1, 2, or 3 independently selected R g groups;

each R g is independently selected from the group consisting of OH, NO 2 , CN, halo, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-4 haloalkyl, C 1-6 alkoxy, C 1-6 haloalkoxy, cyano—C 1-3 alkyl, HO—C 1-3 alkyl, amino, C 1-6 alkylamino, di(C 1-6 alkyl)amino, thio, C 1-6 alkylthio, C 1-6 alkylsulfinyl, C 1-6 alkylsulfonyl, carbamyl, C 1-6 alkylcarbamyl, di(C 1-6 alkyl)carbamyl, carboxy, C 1-6 alkylcarbonyl, C 1-6 alkoxycarbonyl, C 1-6 alkylcarbonylamino, C 1-6 alkylsulfonylamino, aminosulfonyl, C 1-6 alkylaminosulfonyl, di(C h6 alkyl)aminosulfonyl, aminosulfonylamino, C 1-6 alkylaminosulfonylamino, di(C 1-6 alkyl)aminosulfonylamino, aminocarbonylamino, C 1-6 alkylaminocarbonylamino, and di(C 1-6 alkyl)aminocarbonylamino.

5. The drill-in slurry of claim 4 , wherein n is an integer between 1 and 20.

6. The drill-in slurry of claim 5 , wherein each of R 1 , R 2 , R 4 , R 5a , R 5b , R 6a and R 6b is independently selected from the group consisting of H and C 1-3 alkyl.

7. The drill-in slurry of claim 4 , wherein n is an integer between 2 and 20, and at least at one occurrence any two adjacent R 3 groups together with the nitrogen atoms to which they are attached, the carbon atom to which R 5a and R 5b are attached and the carbon atom to which R 6a and R 6b are attached form a 5-10 membered heterocycloalkyl, which is optionally substituted with 1, 2, or 3 independently selected R g substituents.

8. The drill-in slurry of claim 6 , wherein each R 3 is selected from the group consisting of H, C 1-6 alkyl and a moiety of formula (i):

wherein each R 8 , R 9a , R 9b , R 10a and R 10b is independently selected from the group consisting of H and C 1-3 alkyl; and each R 7 is selected from the group consisting of H and C 1-6 alkyl;

wherein the C 1-6 alkyl is optionally substituted with 1 or 2 amino groups.

9. The drill-in slurry of claim 6 , wherein R 3 is selected from the group consisting of H, CH 3 and a moiety of formula (i-a):

wherein m is an integer between 1 and 5.

10. The drill-in slurry of claim 5 , wherein the compound of Formula (I) is selected from the group consisting of:

11. The drill-in slurry of claim 1 , wherein the hygroscopic chelating agent is selected from the group consisting of:

or a mixture thereof.

12. The drill-in slurry claim 1 , wherein an amount of the hygroscopic chelating agent in the drill-in slurry is in a range of about 1 wt. % to about 4 wt. %.

13. The drill-in slurry of claim 12 , wherein the amount of the hygroscopic chelating agent in the drill-in slurry is in a range of about 1 wt. % to about 2 wt. %.

14. The drill-in slurry of claim 1 , comprising at least one alkali formate.

15. The drill-in slurry of claim 14 , wherein an amount of the at least one alkali formate in the drill-in slurry is from about 20 wt. % to about 60 wt. %.

16. The drill-in slurry of claim 1 , comprising an additional ingredient selected from the group consisting of a defoamer, a viscosity modifier, a stabilizer, soda ash, sodium bicarbonate, or a combination thereof.

17. The drill-in slurry of claim 1 , wherein the pH of the drill-in slurry is in the range of about 9 to about 11, the density of the drill-in slurry is in a range of about 50 pcf to about 150 pcf, and the plastic viscosity of the drill-in slurry is in a range of about 5 to about 50 cP.

18. The drill-in slurry of claim 1 , wherein the plastic viscosity of the slurry under standard conditions is about 20 cP to about 50 cP.

19. The drill-in slurry of claim 1 , wherein the plastic viscosity of the slurry under harsh conditions is about 10 cP to about 30 cP.