US3851171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for tracing the flow of water in subterranean formations
Assignee: Union Oil Company of California
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Filing: 1973-10-10
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Granted: 1974-11-26
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Expires: 1993-10-10
Abstract
Abstract A method for tracing the flow of water through a subterranean formation in which a water-soluble substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene is added to the water at a selected point and samples of water are withdrawn from the formation at one or more points remote from the point of addition and analyzed for the presence of this agent.
Inventors
- 👤 B Saniford
- 👤 R Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:29
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/11; G; G01; G01V; G01V9/00; G01V9/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
43 words
A METHOD FOR TRACING THE FLOW OF WATER WHICH COMPRISES ADDING A WATER-SOLUBLE SUBSTITUTED POLY(HYDROXYALKYL) BIS (TRIAZINYLAMINO)STILBENE TO THE WATER AT AN ORIGIN POINT, RECOVERING A SAMPLE OF WATER AT A RECOVERY POINT, AND ANALYZING THE SAMPLE FOR THE PRESENCE OF SAID AGENT.
Claim 2
Independent Claim
43 words
A METHOD FOR TRACING THE FLOW OF WATER WHICH COMPRISES ADDING A WATER-SOLUBLE SUBSTITUTED POLY(HYDROXYALKYL) BIS (TRIAZINYLAMINO)STILBENE TO THE WATER AT AN ORIGIN POINT, RECOVERING A SAMPLE OF WATER AT A RECOVERY POINT, AND ANALYZING THE SAMPLE FOR THE PRESENCE OF SAID AGENT.
Claim 3
Dependent Claim
18 words
The method defined in claim 1 wherein said substituted poly(hydroxalkyl) bis(triazinylamino)stilbene is characterized by the following generalized formula:
Claim 4
Dependent Claim
18 words
The method defined in claim 1 wherein said substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene is a 4,4''-bis(4-(3-sulfoanilino)-6-((bis-2-hydroxyethyl)-amino)-1,3,5-triazin-2 -ylamino)stilbene-2,2''-disulfonic acid tetrasodium salt.
Claim 5
Dependent Claim
27 words
The method defined in claim 1 wherein sufficient of said water-soluble agent is added at the origin point to produce a detectable concentration at a recovery point.
Claim 6
Dependent Claim
25 words
The method defined in claim 1 wherein about 20 ppm to 500 ppm of said agent is added to the water at the origin point.
Claim 7
Dependent Claim
34 words
The method defined in claim 1 wherein said recovered water is analyzed for the presence of said water-soluble substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene by determining the luminosity of the aqueous solution when exposed to ultraviolet light.
Claim 8
Independent Claim
66 words
A method for tracing the flow of an aqueous media through a subterranean petroleum reservoir from an input well to an output well, which comprises: ADDING a water-soluble substituted poly(hydroxylalkyl) bis(triazinylamino)stilbene to the aqueous media at the input well; recovering a sample of water at the output well; and analyzing the recovered water for said agent as an indication of water derivation from the input well.
Claim 9
Independent Claim
66 words
A method for tracing the flow of an aqueous media through a subterranean petroleum reservoir from an input well to an output well, which comprises: ADDING a water-soluble substituted poly(hydroxylalkyl) bis(triazinylamino)stilbene to the aqueous media at the input well; recovering a sample of water at the output well; and analyzing the recovered water for said agent as an indication of water derivation from the input well.
Claim 10
Dependent Claim
28 words
The method defined in claim 7 wherein a slug of aqueous substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene is injected into the input well and followed by the injection of aqueous media.
Claim 11
Dependent Claim
18 words
The method defined in claim 7 wherein said substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene is characterized by the following generalized formula
Claim 12
Dependent Claim
18 words
The method defined in claim 7 wherein said substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene is a 4,4''-bis(4-(3-sulfoanilino)-6-((bis-2-hydroxyethyl)-amino)-1,3,5-triazin-2 -ylamino)stilbene-2,2''-disulfonic acid tetrasodium salt.
Claim 13
Dependent Claim
27 words
The method defined in claim 7 wherein sufficient of said water-soluble agent is added at the input well to produce a detectable concentration at the output well.
Claim 14
Dependent Claim
25 words
The method defined in claim 7 wherein about 20 ppm to 500 ppm of said agent is added to the water at the input well.
Claim 15
Dependent Claim
34 words
The method defined in claim 7 wherein said recovered water is analyzed for the presence of said water-soluble substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene by determining the luminosity of the aqueous solution when exposed to ultraviolet light.
Claim 16
Independent Claim
93 words
A method for tracing the flow of aqueous flooding medium through a petroleum reservoir from an input well to an output well, which comprises: adding a water-soluble substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene to the aqueous media at the input well in sufficient quantity to produce a detectable concentration at the output well; thereafter injecting aqueous flooding medium into said input well; obtaining a sample of recovered water from a spaced output well; and analyzing said sample of recovered water for the presence of said substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene by determining its luminosity under ultra violet light.
Claim 17
Independent Claim
93 words
A method for tracing the flow of aqueous flooding medium through a petroleum reservoir from an input well to an output well, which comprises: adding a water-soluble substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene to the aqueous media at the input well in sufficient quantity to produce a detectable concentration at the output well; thereafter injecting aqueous flooding medium into said input well; obtaining a sample of recovered water from a spaced output well; and analyzing said sample of recovered water for the presence of said substituted poly(hydroxyalkyl) bis(triazinylamino)stilbene by determining its luminosity under ultra violet light.
Claim 18
Dependent Claim
25 words
The method defined in claim 14 wherein about 20 ppm to 500 ppm of said agent is added to the water at the input well.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |