US4802533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling permeability damage of hydrocarbon formations during steam injection while preventing pipe corrosion
Assignee: Chevron USA Inc
•
Filing: 1988-05-24
•
Granted: 1989-02-07
•
Expires: 2008-05-24
Abstract
Abstract The present invention provides a method for inhibiting permeablility damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetrating the formation while inhibiting pipe corrosion. It comprises: (1) injecting a wet steam comprising (a) an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of the wet steam effective to inhibit the permeability damage of the formation in the vicinity of the vapor phase, and (b) an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, effective to raise the pH of the liquid phase of the wet steam within the range of from about 7.5 to about 10.5; and (2) monitoring the pH of the residual liquid phase and continually adjusting the addition of the bicarbonate salt to maintain the pH within the range of from about 7.5 to about 10.5.
Inventors
- 👤 Liming Hsueh
- 👤 Marion G. Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:58
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; C; C09; C09K; C09K8/00; C09K8/60; C09K8/607; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
136 words
A method for inhibiting permeability damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetration said formation, comprising: (a) injecting a wet steam including an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation in the vicinity of the vapor phase, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, sufficient to raise the pH of the liquid phase of said wet steam to within the range of from about 7.5 to about 10.5; and (b) monitoring the pH of the residual liquid phase and continually adjusting the addition of said bicarbonate salt to maintain the pH within the range of from about 7.5 to about 10.5.
Claim 2
Independent Claim
136 words
A method for inhibiting permeability damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetration said formation, comprising: (a) injecting a wet steam including an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation in the vicinity of the vapor phase, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, sufficient to raise the pH of the liquid phase of said wet steam to within the range of from about 7.5 to about 10.5; and (b) monitoring the pH of the residual liquid phase and continually adjusting the addition of said bicarbonate salt to maintain the pH within the range of from about 7.5 to about 10.5.
Claim 3
Dependent Claim
25 words
A method, according to claim 1, wherein the ammonium ion concentration in the vapor phase condensate of said wet steam is less than 2 N.
Claim 4
Dependent Claim
28 words
A method, according to claim 2, wherein the ammonium ion concentration in the vapor phase condensate of said wet steam is of from 0.01 N to 0.5 N.
Claim 5
Dependent Claim
37 words
A method, according to claim 1, wherein the source of said ammonium ion is selected from the group consisting of ammonium bicarbonate, ammonium carbonate, ammonium sulfate, ammonium chloride, ammonium hydroxide, ammonium acetate, ammonium nitrate, and mixtures thereof.
Claim 6
Dependent Claim
31 words
A method, according to claim 1, wherein the source of said ammonium ions is added into the boiler feedwater used to generate said wet steam or into the wet steam itself.
Claim 7
Dependent Claim
30 words
A method, according to claim 1, wherein said source of bicarbonate ions is added into the boiler feedwater used to generate said wet steam or into the wet steam itself.
Claim 8
Dependent Claim
26 words
A method, according to claim 1, wherein the pH ranges in steps (a) and (b) of claim 1 are both from about 8.5 to about 9.5.
Claim 9
Dependent Claim
64 words
A method, according to claim 1, wherein said steam further comprises: an amount of a salt of an alkali metal selected from the group consisting of potassium, rubidium, and cesium to form an alkali metal ion concentration in the liquid phase of said wet steam effective to inhibit permeability damage of said formation in the vicinity of the liquid phase of said wet steam.
Claim 10
Dependent Claim
28 words
A method, according to claim 8, wherein said alkali metal ion concentration in the liquid phase of said wet steam ranges from about 0.01 to about 1 N.
Claim 11
Dependent Claim
14 words
A method, according to claim 8, wherein said alkali metal ion comprises potassium ions.
Claim 12
Dependent Claim
32 words
A method, according to claim 10, wherein said source of potassium ions is selected from the group consisting of potassium sulfate, potassium chloride, potassium acetate, potassium nitrate, potassium carbonate, and mixtures thereof.
Claim 13
Dependent Claim
31 words
A method, according to claim 8, wherein said source of alkali metal ion is added into the boiler feedwater used to generate said wet steam or into the wet steam itself.
Claim 14
Independent Claim
171 words
A method for inhibiting permeability damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetrating said formation, comprising: (a) injecting a wet steam including an amoutt of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation in the vicinity of the vapor phase, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, effective to raise the pH of the liquid phase of said wet steam to with in the range of from about 8.5 to about 9.5, and an amount of a potassium salt in the liquid phase of said wet steam effective to inhibit permeability damage of said formation in the vicinity of the liquid phase of said wet steam; and (b) monitoring the pH of the residual liquid phase and continually adjusting the addition of said bicarbonate salt to maintain the pH within the range of from about 9.5 to about 9.5.
Claim 15
Independent Claim
171 words
A method for inhibiting permeability damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetrating said formation, comprising: (a) injecting a wet steam including an amoutt of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation in the vicinity of the vapor phase, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, effective to raise the pH of the liquid phase of said wet steam to with in the range of from about 8.5 to about 9.5, and an amount of a potassium salt in the liquid phase of said wet steam effective to inhibit permeability damage of said formation in the vicinity of the liquid phase of said wet steam; and (b) monitoring the pH of the residual liquid phase and continually adjusting the addition of said bicarbonate salt to maintain the pH within the range of from about 9.5 to about 9.5.
Claim 16
Independent Claim
136 words
A method for inhibiting permeability damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetration said formation, comprising; (a) injecting a wet steam including an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation in the vicinity of the vapor phase, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, sufficient to raise the pH of the liquid phase of said wet steam to within the range of from about 7.5 to about 10.5; and (b) monitoring the pH of the residual liquid phase and adjusting the addition of said bicarbonate salt to continually maintain the pH within the range of from about 7.5 to about 10.5.
Claim 17
Independent Claim
136 words
A method for inhibiting permeability damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetration said formation, comprising; (a) injecting a wet steam including an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation in the vicinity of the vapor phase, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, sufficient to raise the pH of the liquid phase of said wet steam to within the range of from about 7.5 to about 10.5; and (b) monitoring the pH of the residual liquid phase and adjusting the addition of said bicarbonate salt to continually maintain the pH within the range of from about 7.5 to about 10.5.
Claim 18
Independent Claim
145 words
A method for inhibitig permeability damage of a hydrocarbon formation containing clay minerals, and formation penetrated by an injection well and a production well, comprising: (a) injecting through an injection well a wet steam including an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, sufficient to raise the pH of the liquid phase of said wet steam to within the range of from about 7.5 to about 10.5; (b) monitoring the pH of the residual liquid phase and continually adjusting the addition of said bicarbonate salt to maintain the pH within the range of from about 7.5 to about 10.5, and (c) recovering hydrocarbons from said formation through said production well.
Claim 19
Independent Claim
145 words
A method for inhibitig permeability damage of a hydrocarbon formation containing clay minerals, and formation penetrated by an injection well and a production well, comprising: (a) injecting through an injection well a wet steam including an amount of ammonium ions to produce an ammonium ion concentration in the vapor phase condensate of said wet steam effective to inhibit the permeability damage of said formation, and an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, sufficient to raise the pH of the liquid phase of said wet steam to within the range of from about 7.5 to about 10.5; (b) monitoring the pH of the residual liquid phase and continually adjusting the addition of said bicarbonate salt to maintain the pH within the range of from about 7.5 to about 10.5, and (c) recovering hydrocarbons from said formation through said production well.
Claim 20
Dependent Claim
25 words
A method, according to claim 15, wherein the ammonium ion concentration in the vapor phase condensate of said wet steam is less than 2 N.
Claim 21
Dependent Claim
37 words
A method, according to claim 15, wherein the source of said ammonium ion is selected from the group consisting of ammonium bicarbonate, ammonium carbonate, ammonium sulfate, ammonium chloride, ammonium hydroxide, ammonium acetate, ammonium nitrate, and mixtures thereof.
Claim 22
Dependent Claim
31 words
A method, according to claim 15, wherein the source of said ammonium ions is added into the boiler feedwater used to generate said wet steam or into the wet steam itself.
Claim 23
Dependent Claim
30 words
A method, according to claim 15, wherein said source of bicarbonate ions is added into the boiler feedwater used to generate said wet steam or into the wet steam itself.
Claim 24
Dependent Claim
26 words
A method, according to claim 15, wherein the pH ranges in steps (a) and (b) of claim 1 are both from about 8.5 to about 9.5.
Claim 25
Dependent Claim
64 words
A method, according to claim 15, wherein said steam further comprises: an amount of a salt of an alkali metal selected from the group consisting of potassium, rubidium, and cesium to form an alkali metal ion concentration in the liquid phase of said wet steam effective to inhibit permeability damage of said formation in the vicinity of the liquid phase of said wet steam.
Claim 26
Dependent Claim
28 words
A method, according to claim 21, wherein said alkali metal ion concentration in the liquid phase of said wet steam ranges from about 0.01 to about 1 N.
Claim 27
Dependent Claim
14 words
A method, according to claim 21, wherein said alkali metal ion comprises potassium ions.
Claim 28
Dependent Claim
32 words
A method, according to claim 23, wherein said source of potassium ions is selected from the group consisting of potassium sulfate, potassium chloride, potassium acetate, potassium nitrate, potassium carbonate, and mixtures thereof.
Claim 29
Dependent Claim
31 words
A method, according to claim 21, wherein said source of alkali metal ion is added into the boiler feedwater used to generate said wet steam or into the wet steam itself.
References Cited (Backward Citations)
US3193009A
Cited
US3237692A
Cited
US3476183A
Cited
US3543858A
Cited
US3807500A
Cited
US4068716A
Cited
US4475595A
Cited
US4476930A
Cited
US4549609A
Cited
US4580633A
Cited
US4522263A
Cited
US4625802A
Cited
US4572296A
Cited
US4714112A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |