Enzyme destabilizers for destabilizing enzymes producing sulfur containing compounds in downhole fluids

Patent metadata

Field	Value
Publication number	US-2017233628-A1
Application number	US-201715431200-A
Country	US
Kind code	A1
Filing date	Feb 13, 2017
Priority date	Feb 15, 2016
Publication date	Aug 17, 2017
Grant date	—

Abstract

Methods and fluid compositions are provided for decreasing an amount of sulfur-containing compounds in downhole fluids and/or subterranean reservoir wellbores by including at least one enzyme destabilizer in a fluid composition. The fluid composition may then be circulated into a subterranean reservoir wellbore. The fluid composition may further include a base fluid and at least one sulfur producing enzyme. The base fluid may be or include, but is not limited to, drilling fluids, servicing fluids, production fluids, completion fluids, injection fluids, refinery fluids, and combinations thereof. The enzyme destabilizer(s) may be destabilize the sulfur producing enzymes and thereby decrease an amount of sulfur-containing compounds produced vis-à-vis the sulfur producing enzyme(s).

First claim

What is claimed is:

1 . A fluid composition comprising:
a base fluid selected from the group consisting of drilling fluids, servicing fluids, production fluids, completion fluids, injection fluids, refinery fluids, and combinations thereof; and at least one sulfur producing enzyme; at least one enzyme destabilizer selected from the group consisting of a denaturant, an active site inhibitor, an allosteric inhibitor, and combinations thereof; wherein the fluid composition comprises a decreased amount of sulfur-containing compounds in the presence of the at least one enzyme destabilizer as compared to an otherwise identical fluid absent the at least one enzyme destabilizer.

2 . The fluid composition of claim 1 , wherein the concentration of the at least one enzyme destabilizer within the fluid composition ranges from about 1 nM to about 1 mM as compared to the total base fluid.

3 . The fluid composition of claim 1 , wherein the fluid composition further comprises an additional component selected from the group consisting of pH altering agents, pH buffering agents, salts for altering the electrostatic stability of the enzyme, and combinations thereof.

4 . The fluid composition of claim 1 , wherein the at least one sulfur producing enzyme is selected from the group consisting of ATP: sulfate adenylyltransferase, adenoside-5′-phosphosulfonate reductase, sulfite reductase, sulfite:oxygen oxidoreductase, hydrogensulfite reductase, sulfite reductase, O-phosphoserine sulfhydrolase, cysteine synthase, and combinations thereof.

5 . The fluid composition of claim 1 , wherein at least one sulfur-species bacteria comprises the at least one sulfur producing enzyme; wherein the at least one sulfur-species bacteria is selected from the group consisting of Desulfovibrio vulgaris, Desulfovibrio desulfuricans, Desulfovibrio aespoeensis, Thermodesulfobium narugense, Desulfotomaculum carboxydivorans, Desulfotomaculum ruminis, Desulfovibrio africanus, Desulfovibrio hydrothermalis, Desulfovibrio piezophilus, Desulfobacterium corrodens , Sulfate-reducing bacterium QLNR1 , Desulfobacterium catecholicum, Desulfobacterium catecholicum, Desulfobulbus marinus, Desulfobulbus, Desulfobulbus propionicus, Desulfocapsa thiozymogenes, Desulfocapsa sulfexigens, Desulforhopalus vacuolatus, Desulforhopalus, Desulfofustis glycolicus strain, Desulforhopalus singaporensis, Desulfobacterium, Desulfobacterium zeppelinii strain, Desulfobacterium autotrophicum, Desulfobacula phenolica, Desulfobacula toluolica Tol2, Sulfate-reducing bacterium JHA1 , Desulfospira joergensenii, Desulfobacter, Desulfobacter postgatei, Desulfotignum, Desulfotignum balticum, Desulforegula conservatrix, Desulfocella, Desulfobotulus sapovorans, Desulfofrigus, Desulfonema magnum, Desulfonema limicola, Desulfobacterium indolicum, Desulfosarcina variabilis, Desulfatibacillum, Desulfococcus multivorans, Desulfococcus, Desulfonema ishimotonii Desulfococcus oleovorans Hxd3 , Desulfococcus niacini, Desulfotomaculum, Desulfotomaculum nigrificans, Desulfotomaculum ruminis, Desulfotomaculum halophilum, Desulfotomaculum acetoxidans, Desulfotomaculum gibsoniae, Desulfotomaculum sapomandens strain, Desulfotomaculum thermosapovorans, Desulfotomaculum, Desulfotomaculum geothermicum, Desulfotomaculum, Desulfosporosinus meridiei, Delta proteobacterium, Thermodesulforhabdus norvegica, Desulfacinum infernum, Desulfacinum hydrothermale, Desulforhabdus amnigena, Desulforhabdus, Desulforhabdus, Desulfomonile tiedjei, Desulfarculus baarsii , Sulfate-reducing bacterium, Sulfate-reducing bacterium, Sulfate-reducing bacterium, Desulfobacterium anilini, Delta proteobacterium, Desulfovibrio profundus strain, Desulfomicrobium baculatum, Desulfocaldus hobo, Desulfovibrio, Desulfovibrio piger, Desulfovibrio ferrophilus, Desulfonatronovibrio hydrogenovorans, Desulfovibrio, Desulfovibrio acrylicus, Desulfovibrio salexigens, Desulfovibrio oxyclinae, Desulfonauticus submarinus, Desulfothermus naphthae, Thermodesulfobacterium, Thermodesulfobacterium hveragerdense, Thermodesulfobacterium thermophilum, Thermodesulfatator indicus, Thermodesulfovibrio yellowstonii, Desulfosporosinus orientis, Desulfotomaculum thermobenzoicum, Desulfotomaculum, Desulfotomaculum, Desulfotomaculum solfataricum, Desulfotomaculum luciae strain, Desulfobacca acetoxidans, Desulfovibrio vulgaris, Desulfovibrio desulfuricans, Desulfovibrio alaskensis, Desulfovibrio magneticus, Desulfosporosinus acidiphilus, Desulfotomaculum kuznetsovii, Desulfotomaculum kuznetsovii, Desulfovibrio sulfodismutans, Desulfomicrobium baculatum, Desulfonatronum lacustre, Desulfohalobium retbaense, Desulfonauticus autotrophicus, Thermodesulfobacterium commune, Thermodesulfobacterium hveragerdense, Thermodesulfovibrio islandicus, Thermodesulfovibrio, Thermodesulfobacterium, Desulfotomaculum thermobenzoicum, Desulfotomaculum thermoacetoxidans, Desulfotomaculum thermocisternum, Desulfotomaculum australicum, Desulfotomaculum kuznetsovii, Desulfovibrio desulfuricans, Desulfovibrio alaskensis, Desulfovibrio vulgaris, Desulfovibrio salexigens, Desulfosporosinus acidiphilus, Desulfosporosinus meridiei, Desulfosporosinus orientis, Desulfotomaculum reducens , and combinations thereof.

6 . The fluid composition of claim 1 , wherein the at least one enzyme destabilizer is selected from the group consisting of malimide, sodium flurophosphate, iodoacetamide, sodium dodecyl sulfate, sodium chromium tetrahydrate, 5,5′-dithiobis(2-nitrobenzoic acid), sodium molybdate, and combinations thereof.

7 . The fluid composition of claim 1 , wherein the at least one sulfur containing compound is selected from the group consisting of hydrogen sulfide, mercaptans, thiols, polysulfide, sulfide, cysteine, thioethers, elemental sulfur, and combinations thereof.

8 . A method comprising:
circulating a fluid composition into a subterranean reservoir wellbore; wherein the fluid composition comprises at least one enzyme destabilizer in an effective concentration to decrease an amount of at least one sulfur producing enzyme; wherein the at least one enzyme destabilizer selected from the group consisting of a denaturant, an active site inhibitor, an allosteric inhibitor, and combinations thereof; and decreasing an amount of the sulfur-containing compounds produced with the at least one sulfur producing enzyme in the subterranean reservoir wellbore and/or downhole fluids recovered therefrom as compared to an identical fluid composition absent the at least one enzyme destabilizer.

9 . The method of claim 8 , wherein the concentration of the at least one enzyme destabilizer within the fluid composition ranges from about 1 nM to about 1 mM as compared to the total fluid composition.

10 . The method of claim 8 , wherein the fluid composition further comprises an additional component selected from the group consisting of pH altering agents, pH buffering agents, salts for altering the electrostatic stability of the enzyme, and combinations thereof.

11 . The method of claim 8 , wherein the at least one sulfur producing enzyme is selected from the group consisting of ATP: sulfate adenylyltransferase, adenoside-5′-phosphosulfonate reductase, sulfite reductase, sulfite:oxygen oxidoreductase, hydrogensulfite reductase, sulfite reductase, O-phosphoserine sulfhydrolase, cysteine synthase, and combinations thereof.

12 . The method of claim 8 , wherein at least one sulfur-species bacteria comprises the at least one sulfur producing enzyme; wherein the at least one sulfur-species bacteria is selected from the group consisting of Desulfovibrio vulgaris, Desulfovibrio desulfuricans, Desulfovibrio aespoeensis, Thermodesulfobium narugense, Desulfotomaculum carboxydivorans, De

Assignees

• Baker Hughes Inc

Inventors

• Armstrong Charles David

Classifications

• C12Y108/99003

  Hydrogensulfite reductase (1.8.99.3) · CPC title

• C09K2208/20

  Hydrogen sulfide elimination · CPC title

• C12N9/1085

  transferring alkyl or aryl groups other than methyl groups (2.5) · CPC title

• C09K8/035 Primary

  Organic additives · CPC title

• C12Y108/99002

  Adenylyl-sulfate reductase (1.8.99.2) · CPC title