Method and composition for inhibiting asphaltene deposition in a hydrocarbon mixture

Patent metadata

Field	Value
Publication number	US-9150472-B2
Application number	US-201214366828-A
Country	US
Kind code	B2
Filing date	Dec 17, 2012
Priority date	Dec 21, 2011
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

A method of inhibiting the deposition of asphaltene in a mixture comprising hydrocarbons, the method comprising contacting the mixture with a composition which comprises at least one poly(hydroxycarboxylic acid) amide salt derivative.

First claim

The invention claimed is:

1. A method of inhibiting the deposition of asphaltene in a mixture comprising hydrocarbons, the method comprising contacting the mixture with a composition which comprises at least one poly(hydroxycarboxylic acid) amide salt derivative having the chemical formula [Y—CO[O-A-CO] n —Z r —R + ] m pX q− ,
wherein Y is hydrogen or optionally substituted hydrocarbyl group, A is a divalent optionally substituted hydrocarbyl group, n is from 1 to 100, m is from 1 to 4, q is from 1 to 4 and p is an integer such that pq=m, Z is an optionally substituted divalent bridging group which is attached to the carbonyl group through a nitrogen atom, r is 0 or 1, R + is an ammonium group and X q− is an anion.

2. The method of claim 1 wherein the poly(hydroxycarboxylic acid) amide salt derivative is injected into the well head or an injection well.

3. The method of claim 1 wherein the poly(hydroxycarboxylic acid) amide salt derivative is injected into the pipeline transporting the crude oil.

4. The method of claim 1 wherein the poly(hydroxycarboxylic acid) amide salt derivative is injected into the near wellbore region of a hydrocarbon containing formation.

5. A composition for inhibiting the deposition of asphaltenes in a hydrocarbon mixture which comprises at least one poly(hydroxycarboxylic acid) amide salt derivative having the chemical formula [Y—CO[O-A-CO] n —Z r —R + ] m pX q− ,
wherein Y is hydrogen or optionally substituted hydrocarbyl group, A is a divalent optionally substituted hydrocarbyl group, n is from 1 to 100, m is from 1 to 4, q is from 1 to 4 and p is an integer such that pq=m, Z is an optionally substituted divalent bridging group which is attached to the carbonyl group through a nitrogen atom, r is 0 or 1, R + is an ammonium group and X q− is an anion.

6. An asphaltene inhibited mixture comprising hydrocarbons and a composition comprising at least one poly(hydroxycarboxylic acid) amide salt derivative having the chemical formula [Y—CO[O-A-CO] n —Z r —R + ] m pX q− ,
wherein Y is hydrogen or optionally substituted hydrocarbyl group, A is a divalent optionally substituted hydrocarbyl group, n is from 1 to 100, m is from 1 to 4, q is from 1 to 4 and p is an integer such that pq=m, Z is an optionally substituted divalent bridging group which is attached to the carbonyl group through a nitrogen atom, r is 0 or 1, R + is an ammonium group and X q− is an anion.

7. The mixture of claim 6 wherein the hydrocarbons comprise crude oil produced from a hydrocarbon containing formation.

Assignees

• Huo Zhongxin
• Shea Timothy Michael
• Kuijvenhoven Cornelis Antonius Theodorus
• Zhang Ying
• Shell Oil Co

Inventors

• Huo Zhongxin
• Shea Timothy Michael
• Kuijvenhoven Cornelis Antonius Theodorus
• Zhang Ying

Classifications

• C10G75/04 Primary

  by addition of antifouling agents · CPC title

• C09K8/524 Primary

  organic depositions, e.g. paraffins or asphaltenes · CPC title

• E21B43/25

  Methods for stimulating production {(by vibrating earth formations E21B43/003)} · CPC title

• C07C7/20 Primary

  Use of additives, e.g. for stabilisation · CPC title