Solid paraffin inhibitor and corrosion inhibitor compositions
The present disclosure describes solid compositions comprising a paraffin inhibitor and a corrosion inhibitor. The paraffin inhibitors include polymers having various repeat units containing one or more ester moieties. The corrosion inhibitors can be imidazoline compounds, quaternary ammonium compounds, or a combination thereof. These solid compositions can be used to treat subterranean hydrocarbon-containing reservoir and can inhibit or reduce paraffin deposition in the reservoir and/or inhibit or reduce corrosion in a piece of equipment in contact with the reservoir.
1. A solid composition comprising a paraffin inhibitor and a corrosion inhibitor, the paraffin inhibitor comprising a polymer having the structure corresponding to Formulae 1, 2, or 3
wherein
R 1 and R 5 are independently hydrogen, alkyl, or alkaryl;
R 2 and R 3 are independently selected from C 10 to C 30 alkyl or C 10 to C 30 alkenyl;
R 4 and R 6 are independently selected from alkyl or alkenyl;
n1 is an integer from 2 to 200;
n2 is an integer from 30-50,000;
n3 is an integer from 50-2000;
m is an integer from 1 to 12; and
the corrosion inhibitor comprising:
(i) an imidazoline compound having the structure of Formula 4:
wherein
R 10 is C 1 to C 20 alkyl or C 10 to C 20 alkenyl;
R 12 and R 13 are independently hydrogen or C 1 to C 6 alkyl; and
R 11 is C 1 to C 6 alkyl substituted with —N(R 21 )(R 22 ) or —C(O)OR 24 ,
R 21 is hydrogen or —(CO)R 23 ;
R 22 is —(CO)R 23 ;
R 23 is C 10 to C 20 alkyl or C 10 to C 20 alkenyl; and
R 24 is hydrogen or C 1 to C 6 alkyl;
or a tautomer thereof;
(ii) an imidazole compound having the structure of Formula 5:
wherein
R 10 is C 1 to C 20 alkyl or C 10 to C 20 alkenyl;
R 12 and R 13 are independently hydrogen or C 1 to C 6 alkyl; and
R 11 and R 14 are independently C 1 -C 6 alkyl substituted with —N(R 21 )(R 22 ) or —C(O)OR 24 ;
R 21 is hydrogen, —(CO)R 23 , or C 1 -C 6 alkyl substituted with —C(O)OR 24 ;
R 22 is —(CO)R 23 or C 1 -C 6 alkyl substituted with —C(O)OR 24 ;
R 23 is C 10 to C 20 alkyl or C 10 to C 20 alkenyl; and
R 24 is hydrogen or C 1 to C 6 alkyl;
or a tautomer thereof;
(iii) a quaternary ammonium compound having the structure of Formula 6
wherein
R 25 is C 6 to C 20 alkyl or C 6 to C 20 alkyl wherein one or more —CH 2 — is replaced with —O—; or —(iv) a combination thereof.
2. The solid composition of claim 1 , wherein the solid composition is in the form of a pellet.
3. The solid composition of claim 1 , wherein the paraffin inhibitor comprises the polymer having the structure of Formula 1.
4. The solid composition of claim 3 , wherein R 1 is C 10 to C 40 alkyl and R 2 and R 3 are independently C 10 to C 30 alkyl.
5. The solid composition of claim 1 , wherein the paraffin inhibitor has the structure of Formula 2 and R 4 is C 12 to C 30 alkyl.
6. The solid composition of claim 1 , wherein the paraffin inhibitor has the structure of Formula 3; R 5 is hydrogen or methyl; and R 6 is C 12 to C 30 alkyl.
7. The solid composition of claims 1 , wherein the weight average molecular weight of the polymer having the structure of Formula 1 is from about 1000 Daltons to about 100,000 Daltons.
8. The solid composition of claims 1 , wherein the corrosion inhibitor comprises the imidazoline compound of Formula 4.
9. The solid composition of claim 8 , wherein R 10 is a C 10 to C 20 alkyl or a C 10 to C 20 alkenyl.
10. The solid composition of claim 8 , wherein R 11 is C 1 to C 6 alkyl substituted with —N(R 21 )(R 22 ); R 21 is hydrogen; R 22 is —(CO)R 23 ; and R 23 is C 10 to C 20 alkyl or C 10 to C 20 alkenyl.
11. The solid composition of claims 1 , wherein the corrosion inhibitor comprises the imidazoline compound of Formula 5.
12. The solid composition of claim 11 , wherein R 10 is a C 10 to C 20 alkyl or a C 10 to C 20 alkenyl and R 12 and R 13 are hydrogen.
13. The solid composition of claims 11 , wherein R 11 is C 1 to C 6 alkyl substituted with —N(R 21 )(R 22 ); R 21 is hydrogen; R 22 is —(CO)R 23 ; and R 23 is C 10 to C 20 alkyl or C 10 to C 20 alkenyl.
14. The solid composition of claim 13 , wherein R 14 is C 1 -C 6 alkyl substituted with —C(O)OR 24 ; and R 24 is hydrogen or C 1 to C 3 alkyl.
15. The solid composition of claims 1 , wherein the corrosion inhibitor comprises the quaternary ammonium compound having the structure of Formula 6, wherein R 25 is C 8 to C 16 alkyl.
16. The solid composition of claims 1 , wherein the paraffin inhibitor comprises the polymer of Formula 1 and the corrosion inhibitor comprises the compound of Formula 4 and the compound of Formula 5, wherein a weight ratio of the paraffin inhibitor to the corrosion inhibitor is from about 1:5 to about 5:1.
17. The solid composition of claim 16 , wherein the weight ratio of the paraffin inhibitor to the corrosion inhibitor is from about 1:2 to about 2:1.
18. The solid composition of claim 16 , wherein the weight ratio of the paraffin inhibitor to the corrosion inhibitor is about 1:1.
19. The solid composition of claim 1 , wherein the weight average molecular weight of the polymer having the structure of Formula 1 is from about 1000 Daltons to about 40,000 Daltons.
20. A method for treating a subterranean hydrocarbon-containing reservoir comprising contacting the hydrocarbon with a solid composition of claim 1 .