US4018285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling fines migrations
Assignee: ExxonMobil Upstream Research Co
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Filing: 1976-03-19
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Granted: 1977-04-19
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Expires: 1996-03-19
Abstract
Abstract A method of controlling the migration of fines in a subterranean formation comprising contacting the formation with a dilute resin solution; displacing the resin solution into the formation, preferably with an overflush oil, so as to leave behind a thin film of resin solution; extracting the diluent present in the resin, and then curing the resin to an infusible state. The preferred resin is a one-step phenolic type resin which cures at formation temperatures and which should comprise from about 5 to about 30 weight percent of the resin solution and preferably about 10 to 20 weight percent.
Inventors
- 👤 Larry A. Watkins
- 👤 John W. Graham
- 👤 William M. Salathiel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/504; C09K8/506; C09K8/508; C09K8/5086; C09K8/56; C09K8/57; C09K8/575; C09K8/5751; C09K8/5755
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
101 words
A method for controlling the migration of fine particles in a subterranean formation surrounding a well comprising: contacting said formation with a dilute resin solution, said resin solution comprising a one-step phenolic type resin dissolved in a diluent, said resin having a concentration of between about 10 and 20 weight percent in said resin solution; outwardly displacing said resin solution into said formation so as to leave behind a thin residual resin film in the area of said formation which immediately surrounds said well; extracting said diluent from said resin film; and thereafter curing said resin film to an infusible state.
Claim 2
Independent Claim
101 words
A method for controlling the migration of fine particles in a subterranean formation surrounding a well comprising: contacting said formation with a dilute resin solution, said resin solution comprising a one-step phenolic type resin dissolved in a diluent, said resin having a concentration of between about 10 and 20 weight percent in said resin solution; outwardly displacing said resin solution into said formation so as to leave behind a thin residual resin film in the area of said formation which immediately surrounds said well; extracting said diluent from said resin film; and thereafter curing said resin film to an infusible state.
Claim 3
Dependent Claim
17 words
The method defined in claim 1 wherein said one-step phenolic resin is an alkaline catalyzed phenol formaldehyde.
Claim 4
Dependent Claim
19 words
The method defined in claim 1 wherein said one-step phenolic resin cures at the normal temperature of said formation.
Claim 5
Dependent Claim
16 words
The method defined in claim 1 wherein said resin solution further includes an organo-silicon coupling agent.
Claim 6
Dependent Claim
12 words
The method defined in claim 1 wherein said diluent is an alcohol.
Claim 7
Dependent Claim
20 words
The method defined in claim 5 wherein said alcohol is selected from the group consisting of methanol, ethanol and isopropanol.
Claim 8
Dependent Claim
23 words
The method defined in claim 1 wherein said resin solution is displaced from the pore spaces of said formation with an overflush oil.
Claim 9
Dependent Claim
15 words
The method defined in claim 7 wherein said overflush oil is a refined white oil.
Claim 10
Dependent Claim
17 words
The method defined in claim 1 wherein said diluent is extracted from said resin solution with brine.
Claim 11
Dependent Claim
15 words
The method defined in claim 1 wherein said formation is first preflushed with a solvent.
Claim 12
Dependent Claim
14 words
The method defined in claim 10 wherein said preflush solvent is preferentially water soluble.
Claim 13
Dependent Claim
31 words
The method defined in claim 1 wherein said resin film, after it is cured, imparts a compressive strength of not more than about 300 pounds per square inch to said formation.
Claim 14
Independent Claim
128 words
A method for controlling the migration of fine particles in a subterranean formation surrounding a well comprising: preflushing said formation with a solvent to miscibly displace connate fluids present in said formation; injecting into said formation a dilute resin solution, said resin solution comprising a one-step phenolic type resin in a diluent, said resin having a concentration of between about 5 and 30 weight percent in said resin solution; overflushing said formation with an oil to outwardly displace said resin solution into said formation so as to leave behind a thin residual resin film in the area of said formation which immediately surrounds said well; extracting said diluent from said resin film with brine; and thereafter curing said resin film to an infusible state at normal formation temperatures.
Claim 15
Independent Claim
128 words
A method for controlling the migration of fine particles in a subterranean formation surrounding a well comprising: preflushing said formation with a solvent to miscibly displace connate fluids present in said formation; injecting into said formation a dilute resin solution, said resin solution comprising a one-step phenolic type resin in a diluent, said resin having a concentration of between about 5 and 30 weight percent in said resin solution; overflushing said formation with an oil to outwardly displace said resin solution into said formation so as to leave behind a thin residual resin film in the area of said formation which immediately surrounds said well; extracting said diluent from said resin film with brine; and thereafter curing said resin film to an infusible state at normal formation temperatures.
Claim 16
Dependent Claim
21 words
The method defined in claim 13 wherein said resin comprises between about 20 and 30 weight percent of said resin solution.
Claim 17
Dependent Claim
15 words
The method defined in claim 13 wherein said resin is an alkaline catalyzed phenol formaldehyde.
Claim 18
Dependent Claim
16 words
The method defined in claim 13 wherein said resin solution further includes an organo-silicon coupling agent.
Claim 19
Dependent Claim
12 words
The method defined in claim 13 wherein said diluent is an alcohol.
Claim 20
Dependent Claim
20 words
The method defined in claim 17 wherein said alcohol is selected from the group consisting of methanol, ethanol and isopropanol.
Claim 21
Dependent Claim
31 words
The method defined in claim 13 wherein said resin film, after it is cured, imparts a compressive strength of not more than about 300 pounds per square inch to said formation.
Claim 22
Independent Claim
157 words
A method for controlling the migration of fine particles in a subterranean formation surrounding a well comprising: preflushing said formation with a preferentially water soluble solvent to miscibly diplace connate fluids present in said formation; injecting into said formation a resin solution, said resin solution comprising a one-step phenolic type resin dissolved in a diluent and an organo-silicon coupling agent, said resin having a concentration of between about 5 and 30 weight percent in said resin solution; overflushing said formation with an oil to outwardly displace said resin solution into said formation so as to leave behind a thin residual resin film in the area of said formation which immediately surrounds said well; extracting said diluent from said resin film with brine; and thereafter curing said resin film to an infusible state at normal formation temperatures, said cured resin film imparting a compressive strength of not more than about 300 pounds per square inch to said formation.
Claim 23
Independent Claim
157 words
A method for controlling the migration of fine particles in a subterranean formation surrounding a well comprising: preflushing said formation with a preferentially water soluble solvent to miscibly diplace connate fluids present in said formation; injecting into said formation a resin solution, said resin solution comprising a one-step phenolic type resin dissolved in a diluent and an organo-silicon coupling agent, said resin having a concentration of between about 5 and 30 weight percent in said resin solution; overflushing said formation with an oil to outwardly displace said resin solution into said formation so as to leave behind a thin residual resin film in the area of said formation which immediately surrounds said well; extracting said diluent from said resin film with brine; and thereafter curing said resin film to an infusible state at normal formation temperatures, said cured resin film imparting a compressive strength of not more than about 300 pounds per square inch to said formation.
Claim 24
Dependent Claim
23 words
The method defined in claim 20 wherein said resin has a concentration of between about 10 and 20 percent in said resin solution.
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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) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |