Patent US3822749A successfully refreshed from Google Patents.
US3822749A
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US
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Method of treating subterranean formations to improve permeability
Assignee: Texaco Inc
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Filing: 1972-10-30
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Granted: 1974-07-09
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Expires: 1992-10-30
Abstract
Abstract A method of treating wells drilled in the earth and the subterranean formation surrounding and in fluid communication with the wells by injecting into the wells and surrounding formation a gaseous mixture comprising steam and an aliphatic polyamine such as ethylenediamine, diethylenetriamine, triethylenetetramine, or piperazine, to increase the fluid permeability of the formation, especially formations which have sustained a permeability decline due to contacting water sensitive clay with fresh water.
Inventors
- 👤 A Thigpen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:41
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/84; C09K8/86
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
25 words
A method as recited in claim 1 wherein the aliphatic polyamine is selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetramine, piperazine, and mixtures thereof.
Claim 2
Dependent Claim
13 words
A method as recited in claim 1 wherein the aliphatic polyamine is ethylenediamine.
Claim 3
Dependent Claim
13 words
A method as recited in claim 1 wherein the aliphatic polyamine is diethylenetriamine.
Claim 4
Dependent Claim
13 words
A method as recited in claim 1 wherein the aliphatic polyamine is triethylenetetramine.
Claim 5
Dependent Claim
13 words
A method as recited in claim 1 wherein the aliphatic polyamine is piperazine.
Claim 6
Dependent Claim
22 words
A method as recited in claim 1 wherein said treating composition additionally contains steam having a quality of at least 80 percent.
Claim 7
Dependent Claim
22 words
A method as recited in claim 7 wherein the steam and aliphatic polyamine are in the form of a gaseous azeotropic mixture.
Claim 8
Dependent Claim
29 words
A method as recited in claim 1 wherein from about 10 to about 60 pounds of the aliphatic polyamine per foot of formation thickness are injected into the formation.
Claim 9
Dependent Claim
15 words
A method as recited in claim 1 wherein the gaseous phase displacing fluid is steam.
Claim 10
Dependent Claim
15 words
A method as recited in claim 1 wherein the gaseous phase displacing fluid is air.
Claim 11
Independent Claim
40 words
A method of increasing the permeability of a subterranean petroleum containing formation, which formation contains water sensitive clayey materials which have been contacted previously with water, comprising: a. injecting into said formation a mixture of vaporized aliphatic polyamine and steam.
Claim 12
Dependent Claim
26 words
A method as recited in claim 12 wherein the vaporized aliphatic polyamine is selected from the group consisting of ethylenediamine, diethylenetriamine, triethylenetetramine, piperazine, and mixtures thereof.
Claim 13
Dependent Claim
14 words
A method as recited in claim 12 wherein the vaporized aliphatic polyamine is ethylenediamine.
Claim 14
Dependent Claim
14 words
A method as recited in claim 12 wherein the vaporized aliphatic polyamine is diethylenetriamine.
Claim 15
Dependent Claim
14 words
A method as recited in claim 12 wherein the vaporized aliphatic polyamine is triethylenetetramine.
Claim 16
Dependent Claim
13 words
A method as recited in claim 12 wherein the aliphatic polyamine is piperazine.
Claim 17
Dependent Claim
28 words
A method as recited in claim 12 wherein from about 10 to about 60 pounds of aliphatic polyamine per foot of formation thickness are injected into the formation.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |