Crosslinked acids comprising derivatized xanthan and subterranean acidizing applications
Many methods are provided herein including, in one embodiment, a method comprising: providing a fluid that comprises an acid, crosslinked oxidized xanthan, and optionally, a base fluid; placing the fluid in a well bore penetrating a subterranean formation; and allowing the fluid to acidize at least a portion of the formation or damage contained therein. In another embodiment, herein provided is a fluid for subterranean uses comprising an acid and crosslinked, oxidized xanthan.
1. A fluid for subterranean uses comprising an acid and crosslinked, oxidized xanthan, wherein the crosslinked, oxidized xanthan is crosslinked with a crosslinking agent comprising a metal ion.
2. The fluid of claim 1 wherein the fluid further comprises at least one additional component chosen from the group consisting of: a gelling agent; a diverting agent; a particulate solid diverting agent; a degradable particulate diverting material; a self-degradable particulate diverting material; a mechanical diverting agent; a surfactant; a viscoelastic surfactant; a bactericide; a nonemulsifier; a second acid; a crosslinking agent; a mutual solvent; a fluid loss control agent; a proppant particulate; a pH-adjusting agent; a pH-buffer; an oxidizing agent; an enzyme; a lost circulation material; a scale inhibitor; a surfactant; a clay stabilizer; a corrosion inhibitor; a paraffin inhibitor; an asphaltene inhibitor; a penetrating agent; a clay control additive; an iron control additive; a chelator; a reducer; an oxygen scavenger; a sulfide scavenger; an emulsifier; a foamer; a gas; a breaker; an iron control additive; a derivative thereof; and a combination thereof.
3. The fluid of claim 1 wherein the acid comprises an acid chosen from the group consisting of: organic acids; inorganic acids;
hydrochloric acid; hydrofluoric acid; formic acid; lactic acid; phosphoric acid; sulfamic acid; acetic acid; derivatives thereof; and combinations thereof.
4. The fluid of claim 1 wherein the oxidized xanthan becomes crosslinked after being placed in a well bore.
5. The fluid of claim 1 wherein the oxidized xanthan becomes crosslinked before being placed in a well bore.
6. The fluid of claim 1 wherein the crosslinked oxidized xanthan has been oxidized in a process involving an oxidizer chosen from the group consisting of: salts of perborates; salts of permanganates; salts of percarbonates; salts of periodates; salts of hypochlorite; sodium perborate; sodium persulfate; potassium persulfate; ammonium persulfate; sodium permanganate; potassium permanganate; magnesium permanganate; calcium permanganate; sodium percarbonate; potassium percarbonate; sodium periodate; potassium periodate; sodium hypochlorite; hydrogen peroxide; calcium peroxide; magnesium peroxide; derivatives thereof; and combinations thereof.
7. The fluid of claim 1 wherein the crosslinked oxidized xanthan is pre-oxidized before it is taken to a well site.
8. The fluid of claim 1 wherein the crosslinked xanthan has been crosslinked by use of a crosslinking agent chosen from the group consisting of: zirconium compounds; zirconium lactate; zirconium lactate triethanolamine; zirconium carbonate; zirconium acetylacetonate; zirconium maleate; zirconium citrate; zirconium oxychloride; zirconium diisopropylamine lactate; titanium compounds; titanium lactate; titanium maleate; titanium citrate; titanium ammonium lactate; titanium triethanolamine; titanium acetylacetonate; aluminum compounds; aluminum lactate; aluminum citrate; borate compounds; sodium tetraborate; boric acid; disodium octaborate tetrahydrate; sodium diborate; ulexite; colemanite; antimony compounds; chromium compounds; iron compounds; iron chloride; copper compounds; zinc compounds; divalent ions; calcium chloride; magnesium oxide; derivatives thereof; and combinations thereof.
9. The fluid of claim 1 further comprising a base fluid wherein the base fluid comprises an aqueous-based fluid.
10. A fluid for subterranean uses comprising oxidized xanthan crosslinked with a crosslinking agent comprising a metal ion.
11. The fluid of claim 10 further comprising an acid, wherein the acid comprises an acid chosen from the group consisting of: organic acids; inorganic acids; hydrochloric acid; hydrofluoric acid; formic acid; lactic acid; phosphoric acid; sulfamic acid; acetic acid; derivatives thereof; and combinations thereof.
12. The fluid of claim 10 wherein the oxidized xanthan becomes crosslinked after being placed in a well bore.
13. The fluid of claim 10 wherein the oxidized xanthan becomes crosslinked before being placed in a well bore.
14. The fluid of claim 10 wherein the oxidized xanthan has been oxidized in a process involving an oxidizer chosen from the group consisting of: salts of perborates; salts of permanganates; salts of percarbonates; salts of periodates; salts of hypochlorite; sodium perborate; sodium persulfate; potassium persulfate; ammonium persulfate; sodium permanganate; potassium permanganate; magnesium permanganate; calcium permanganate; sodium percarbonate; potassium percarbonate; sodium periodate; potassium periodate; sodium hypochlorite; hydrogen peroxide; calcium peroxide; magnesium peroxide; derivatives thereof; and combinations thereof.
15. The fluid of claim 10 wherein the crosslinked xanthan has been crosslinked by use of a crosslinking agent chosen from the group consisting of: zirconium compounds; zirconium lactate; zirconium lactate triethanolamine; zirconium carbonate; zirconium acetylacetonate; zirconium maleate; zirconium citrate; zirconium oxychloride; zirconium diisopropylamine lactate; titanium compounds; titanium lactate; titanium maleate; titanium citrate; titanium ammonium lactate; titanium triethanolamine; titanium acetylacetonate; aluminum compounds; aluminum lactate; aluminum citrate; borate compounds; sodium tetraborate; boric acid; disodium octaborate tetrahydrate; sodium diborate; ulexite; colemanite; antimony compounds; chromium compounds; iron compounds; iron chloride; copper compounds; zinc compounds; divalent ions; calcium chloride; magnesium oxide; derivatives thereof; and combinations thereof.
16. The fluid of claim 10 further comprising a base fluid wherein the base fluid comprises an aqueous-based fluid.
17. A method of forming a viscosified fluid comprising:
providing oxidized xanthan;
adding acid to the oxidized xanthan;
optionally adding a base fluid; and
crosslinking the oxidized xanthan with a crosslinking agent comprising a metal ion so as to form a viscosified fluid.
18. The fluid of claim 17 wherein the oxidized xanthan becomes crosslinked after being placed in a well bore.
19. The fluid of claim 17 wherein the oxidized xanthan has been oxidized in a process involving an oxidizer chosen from the group consisting of: salts of perborates; salts of permanganates; salts of percarbonates; salts of periodates; salts of hypochlorite; sodium perborate; sodium persulfate; potassium persulfate; ammonium persulfate; sodium permanganate; potassium permanganate; magnesium permanganate; calcium permanganate; sodium percarbonate; potassium percarbonate; sodium periodate; potassium periodate; sodium hypochlorite; hydrogen peroxide; calcium peroxide; magnesium peroxide; derivatives thereof; and combinations thereof.
20. The fluid of claim 17 wherein the crosslinking agent is chosen from the group consisting of: zirconium compounds; zirconium lactate; zirconium lactate triethanolamine; zirconium carbonate; zirconium acetylacetonate; zirconium maleate; zirconium citrate; zirconium oxychloride; zirconium diisopropylamine lactate; titanium compounds; titanium lactate; titanium maleate; titanium citrate; titanium ammonium lactate; titanium triethanolamine; titanium acetylacetonate; aluminum compounds; aluminum lactate; aluminum citrate; borate compounds; sodium tetraborate; boric acid; disodium octaborate tetrahydrate; sodium diborate; ulexite; colemanite; antimony compounds; chromium compounds; iron compounds; iron chloride; copper compounds; zinc compounds; divalent ions; calcium chloride; magnesium oxide; derivatives thereof; and combinations thereof.