US4819729A
Expired / Lapsed
US
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Method for recovering petroleum using oligomeric surfactants
Assignee: Chevron USA Inc
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Filing: 1987-06-24
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Granted: 1989-04-11
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Expires: 2007-06-24
Abstract
Abstract A method for recovering petroleum from a subterranean, petroleum-containing formation. It includes injecting into said formation a formulation comprising an oligomeric surfactant wherein said oligomeric surfactant has the following formula: R--X--(CH.sub.2 --CR.sub.1 Y).sub.a --(CH.sub.2 --CR.sub.2 Z).sub.b --H wherein R is a linear or branched alkyl or alkylaryl radical having from 6 to 24 carbon atoms; R 1 is selected from the group consisting of hydrogen, methyl, and ethyl; R 2 is selected from the group consisting of hydrogen, methyl, ethyl, and a hydrocarbon having the formula CH 2 COOH; X is selected from the group consisting of sulfides, sulfones, and sulfoxides; Y is selected from the group consisting of hydrocarbons having the formulas CN, CONH 2 , CH 2 CONH 2 , CONHCH 3 , CONHC 2 H 5 , COOCH 3 , COOC 2 H 5 , COOC 2 H 4 OH, COOC 3 H 6 OH, CONHCH 2 OH; Z is selected from the group consisting of hydrocarbons having the formulas COOH, CH 2 COOH, OCH 3 , OC 3 H 5 , CH 2 OH, and salts thereof; a+b is from 2 to 50; and a/(a+b) is from 0 to 0.8.
Inventors
- 👤 J. H. Bae
- 👤 S. I. Chou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:38
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/584; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
201 words
A method for recovering petroleum from a subterranean, petroleum-containing formation comprising: (a) injecting into said formation a formulation comprising a surfactant wherein said surfactant has the following formula: R--X--(CH.sub.2 --CR.sub.1 Y).sub.a --(CH.sub.2 --CR.sub.2 Z).sub.b --H wherein R is a linear or branched alkyl or alkylaryl radical having from 6 to 24 carbon atoms; R 1 is selected from the group consisting of hydrogen, methyl, and ethyl; R 2 is selected from the group consisting of hydrogen, methyl, ethyl, and a hydrocarbon having the formula CH 2 COOH; X is selected from the group consisting of --S--, sulfonyl, or sulfinyl; Y is selected from the group consisting of hydrocarbons having the formulas CN, CONH 2 , CH 2 CONH 2 , CONHCH 3 , CONHC 2 H 5 , COOCH 3 , COOC 2 H 5 , COOC 2 H 4 OH, COOC 3 H 6 OH, and CONHCH 2 OH; Z is selected from the group consisting of hydrocarbons having the formulas COOH, CH 2 COOH, OCH 3 , OC 3 H 5 , CH 2 OH, and salts thereof; a+b is from 2 to 50; and 1/(a+b) is from 0 to 0.8; and (b) recovering said petroleum from said formation.
Claim 2
Independent Claim
201 words
A method for recovering petroleum from a subterranean, petroleum-containing formation comprising: (a) injecting into said formation a formulation comprising a surfactant wherein said surfactant has the following formula: R--X--(CH.sub.2 --CR.sub.1 Y).sub.a --(CH.sub.2 --CR.sub.2 Z).sub.b --H wherein R is a linear or branched alkyl or alkylaryl radical having from 6 to 24 carbon atoms; R 1 is selected from the group consisting of hydrogen, methyl, and ethyl; R 2 is selected from the group consisting of hydrogen, methyl, ethyl, and a hydrocarbon having the formula CH 2 COOH; X is selected from the group consisting of --S--, sulfonyl, or sulfinyl; Y is selected from the group consisting of hydrocarbons having the formulas CN, CONH 2 , CH 2 CONH 2 , CONHCH 3 , CONHC 2 H 5 , COOCH 3 , COOC 2 H 5 , COOC 2 H 4 OH, COOC 3 H 6 OH, and CONHCH 2 OH; Z is selected from the group consisting of hydrocarbons having the formulas COOH, CH 2 COOH, OCH 3 , OC 3 H 5 , CH 2 OH, and salts thereof; a+b is from 2 to 50; and 1/(a+b) is from 0 to 0.8; and (b) recovering said petroleum from said formation.
Claim 3
Dependent Claim
36 words
A method, according to claim 1, wherein R 1 is hydrogen; R 2 is hydrogen; X is --S--; Z has the formula COOM wherein M is a monovalent cation; and a+b is from 8 to 24.
Claim 4
Dependent Claim
21 words
A method, according to claim 2, wherein M is selected from the group consisting of Na, K and NH 4 .
Claim 5
Dependent Claim
13 words
A method, according to claim 1, wherein a/(a+b) varies from 0.05 to 0.6.
Claim 6
Independent Claim
131 words
A method of recovering petroleum from a subterranean, petroleum-containing formation comprising: (a) injecting into said formation a formulation including a surfactant wherein said surfactant has the following formula: R--S--(CH.sub.2 --CHY).sub.a --(CH.sub.2 --CHCOOM).sub.b --H wherein R is a linear or branched alkyl or alkylaryl radical having from 6 to 24 carbon atoms; Y is selected from the group consisting of CN, CONH 2 , CH 2 CONH 2 , CONHCH 3 , CONHC 2 H 5 , COOCH, COOC 2 H 5 , COOC 2 H 4 OH, COOC 3 H 6 OH, and CONHCH 2 OH; M is selected from the group consisting of Na, K and NH 4 ; a+b is from 8 to 24; and a/(a+b) is from 0.05 to 0.6; and (b) recovering said petroleum from said formation.
Claim 7
Independent Claim
131 words
A method of recovering petroleum from a subterranean, petroleum-containing formation comprising: (a) injecting into said formation a formulation including a surfactant wherein said surfactant has the following formula: R--S--(CH.sub.2 --CHY).sub.a --(CH.sub.2 --CHCOOM).sub.b --H wherein R is a linear or branched alkyl or alkylaryl radical having from 6 to 24 carbon atoms; Y is selected from the group consisting of CN, CONH 2 , CH 2 CONH 2 , CONHCH 3 , CONHC 2 H 5 , COOCH, COOC 2 H 5 , COOC 2 H 4 OH, COOC 3 H 6 OH, and CONHCH 2 OH; M is selected from the group consisting of Na, K and NH 4 ; a+b is from 8 to 24; and a/(a+b) is from 0.05 to 0.6; and (b) recovering said petroleum from said formation.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
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