CN105331345A - Retarded foam gel for profile modification of oil field - Google Patents
Retarded foam gel for profile modification of oil field Download PDFInfo
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- CN105331345A CN105331345A CN201510683200.6A CN201510683200A CN105331345A CN 105331345 A CN105331345 A CN 105331345A CN 201510683200 A CN201510683200 A CN 201510683200A CN 105331345 A CN105331345 A CN 105331345A
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- agent
- oil field
- profile control
- gel
- slow
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
- C09K8/518—Foams
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Lubricants (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
The invention concretely provides a retarded foam gel for profile modification of oil field. The retarded foam gel is characterized in that the foam gel comprises the following compositions in percent by weight: 0.1-0.3 wt% of a thickening agent, 0.01-0.03 wt% of a cross-linking agent A, 0.1-0.3 wt% of a cross-linking agent B, 0.2-3.0 wt% of an auxiliary agent, 0.6-9.0 wt% of a gas generation agent, and 87.37-98.99 wt% of water. The foam gel is easily-available in raw material and simple in technology, and solves the problems that a conventional foam profile modifier is large in viscosity, large in friction and not easy to inject during injection, and after the foam profile modifier is crosslinked, viscosity loss is severe and the half life is short. The retarded foam gel is good in salt resistance and temperature resistance, and possesses wide application prospect.
Description
Technical field
The invention belongs to frothy gel research field, be specifically related to the slow frothy gel of a kind of oil field profile control.
Background technology
Current Some Domestic oil field enters high water-cut stage, and chemical water plugging profile control and technology of reservoir sweep are the effective means improved Development Response of Oilfield, realize oil reservoir stable yields, and foam profile control is wherein important measures.The amendment that foam profile control agent is mainly made up of suds-stabilizing agent high molecular polymer and gas or the auxiliary agent such as gas-evolution agent that produces gas, the shortcoming that ubiquity is following:
1, because gas in foam profile control agent mostly adopts injection gas or gas-evolution agent auxiliary agent speed of response comparatively fast, make amendment frictional resistance in injection process large, improve injection pressure, the reliability of impact construction.
2, amendment forms high sticky foam in injection process, affects in the earth formation, can only enter macropore and hypotonic immediate vicinity of wellbore, and can not enter hypotonic well area far away by Jamin effect etc.
3, suds-stabilizing agent salt-resistant temperature poor performance, make suds-stabilizing agent viscosity loss under high salinity serious, cause the foam that foam profile control agent is formed, intensity is little, and the transformation period is short, easily breaks.
Summary of the invention
The object of the invention is to overcome that existing foam profile control agent injection process medium viscosity is large, frictional resistance injects greatly, not easily, in the earth formation with cross-linking agents after viscosity loss is serious, the transformation period is short problem.
For this reason, the invention provides the slow frothy gel of a kind of oil field profile control.Described frothy gel, by weight percentage, following component is comprised: viscosifying agent: 0.1 ~ 0.3wt%, linking agent A:0.01 ~ 0.03wt%, crosslinking agent B: 0.1 ~ 0.3wt%, auxiliary agent: 0.2 ~ 3.0wt%, gas-evolution agent: 0.6 ~ 9.0wt%, water: 87.37 ~ 98.99wt%.
Above-mentioned viscosifying agent is selected from polyacrylamide and derivative thereof.
Above-mentioned polyacrylamide and derivative thereof, its molecular weight is positioned at 5 × 10
6~ 2 × 10
7between.
Above-mentioned linking agent A is selected from phenol or Resorcinol.
Above-mentioned crosslinking agent B is selected from formaldehyde or hexamethylenetetramine.
Above-mentioned auxiliary agent is selected from citric acid capsule or Hydroxycitric acid capsule.
Above-mentioned gas-evolution agent is selected from sodium carbonate.
Beneficial effect of the present invention:
(1) profile control slow frothy gel raw material in this oil field of the present invention is easy to get, and technique is simple, has broad prospect of application.
(2) this oil field of the present invention profile control prepare with slow frothy gel after base fluid viscosity≤100mPas, viscosity is lower, and frictional resistance is little, improves the room for promotion of injection well pressure, can enter low permeability formation well area far away, has ensured the validity of construction.
(3) this oil field of the present invention profile control slowly broken glue of slow frothy gel due to citric acid capsule, extend the gelation time of gel greatly, also delayed the rise time of gas simultaneously, reduce the frictional resistance of construction process, be conducive to frothy gel and enter space, improve sweep area, finally realize stable yields.
(4) this oil field of the present invention profile control with slow frothy gel pump into stratum crosslinked after, viscosity promotes greatly, and in salinity compared with high and well temperature is large compared with gas release time high, greatly, Increased Plasma Half-life, salt-resistant temperature performance is good for foamy body.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further details.
Embodiment 1:
In order to overcome, existing foam profile control agent injection process medium viscosity is large, frictional resistance injects greatly, not easily, in the earth formation with cross-linking agents after viscosity loss is serious, the transformation period is short problem.Present embodiments provide the slow frothy gel of a kind of oil field profile control, described frothy gel, by weight percentage, following component is comprised: viscosifying agent: 0.1 ~ 0.3wt%, linking agent A:0.01 ~ 0.03wt%, crosslinking agent B: 0.1 ~ 0.3wt%, auxiliary agent: 0.2 ~ 3.0wt%, gas-evolution agent: 0.6 ~ 9.0wt%, water: 87.37 ~ 98.99wt%.
Preparation method is as follows for this frothy gel: add water in a reservoir, when stirring with pump circulation or agitator, slowly add polyacrylamide CQS-3, then phenol, formaldehyde, citric acid capsule, sodium carbonate is added respectively, continue circulation or stir 120 minutes, so that liquid mixing is abundant, form solution.During profile control construction, directly solution is pumped into stratum.This oil field of the present invention slow frothy gel raw material of profile control is easy to get, technique is simple, solve that existing foam profile control agent injection process medium viscosity is large, frictional resistance injects greatly, not easily, in the earth formation with cross-linking agents after viscosity loss is serious, the transformation period is short problem, there is broad prospect of application.
This oil field of the present invention profile control is as follows by the principle of work of slow frothy gel:
Citric acid capsule is stressed in the earth formation, the impact of temperature etc. is broken, slowly release citric acid, make its liquid system gradually become acid, linking agent A and crosslinking agent B under acid conditions condensation reaction generate many hydroxymethyl phenols, and many hydroxymethyl phenols and viscosifying agent condensation form gel; Citric acid and sodium carbonate react and generate carbonic acid gas simultaneously.The slowly broken glue of citric acid capsule, extends the gelation time of gel greatly, has also delayed the rise time of gas simultaneously, reduced the frictional resistance of construction process, be conducive to frothy gel and enter space, improve sweep area, finally realize stable yields.
Embodiment 2:
Present embodiments provide the slow frothy gel of a kind of oil field profile control, prepare each component by following weight percent meter: polyacrylamide CQS-3:0.3wt%, phenol: 0.03wt%, formaldehyde: 0.3wt%, citric acid capsule: 3.0wt%, sodium carbonate: 9.0wt%, water: 87.37wt%.
Become base fluid by above-mentioned formulated, base fluid viscosity≤100mPas, at test temperature constant temperature 60min, evaluate, as table 1 according to " mensuration of 5.1.2 lather volume, half foam life period " in QSH0269-2009 " displacement of reservoir oil foaming agent method of evaluating performance ".
Table 1 frothy gel performance
As can be seen from Table 1, this frothy gel is when well temperature rise and well water salinity increase, and viscosity loss is less, and foam volume change is little, and foamy body is large, long half time.
Embodiment 3:
Present embodiments provide the slow frothy gel of a kind of oil field profile control, prepare each component by following weight percent meter: polyacrylamide CQS-3:0.2wt%, dihydroxy-benzene: 0.02wt%, hexamethylenetetramine: 0.2wt%, Hydroxycitric acid capsule: 1.6wt%, sodium carbonate: 4.8wt%, water: 93.18wt%.
Preparation method is as follows for this frothy gel: add water in a reservoir, when stirring with pump circulation or agitator, slowly add polyacrylamide CQS-3, then dihydroxy-benzene, hexamethylenetetramine, Hydroxycitric acid capsule, sodium carbonate is added respectively, continue circulation or stir 120 minutes, so that liquid mixing is abundant, form solution.During profile control construction, directly solution is pumped into stratum.
Become base fluid by above-mentioned formulated, base fluid viscosity≤100mPas, at test temperature constant temperature 60min, evaluate, as table: 2 according to " mensuration of 5.1.2 lather volume, half foam life period " in QSH0269-2009 " displacement of reservoir oil foaming agent method of evaluating performance ".
Table 2 frothy gel performance
As can be seen from Table 2, this frothy gel is when well temperature rise and well water salinity increase, and viscosity loss is less, and foam volume change is little, and foamy body is large, long half time.
Embodiment 4:
Present embodiments provide the slow frothy gel of a kind of oil field profile control, prepare each component by following weight percent meter: polyacrylamide CQS-3:0.1wt%, dihydroxy-benzene: 0.01wt%, hexamethylenetetramine: 0.1wt%, Hydroxycitric acid capsule: 0.2wt%, sodium carbonate: 6.0wt%, (should be 0.6) water: 98.99wt%.
Preparation method is as follows for this frothy gel: add water in a reservoir, when stirring with pump circulation or agitator, slowly add polyacrylamide CQS-3, then dihydroxy-benzene, hexamethylenetetramine, Hydroxycitric acid capsule, sodium carbonate is added respectively, continue circulation or stir 120 minutes, so that liquid mixing is abundant, form solution.During profile control construction, directly solution is pumped into stratum.
Become base fluid by above-mentioned formulated, base fluid viscosity≤100mPas, at test temperature constant temperature 60min, evaluate, as table 3 according to " mensuration of 5.1.2 lather volume, half foam life period " in QSH0269-2009 " displacement of reservoir oil foaming agent method of evaluating performance ".
Table 3 frothy gel performance
As can be seen from Table 3, this frothy gel is when well temperature rise and well water salinity increase, and viscosity loss is less, and foam volume change is little, and foamy body is large, long half time.
In sum, base fluid viscosity≤100mPas after this oil field of the present invention profile control prepares with slow frothy gel, viscosity is lower, and frictional resistance is little, improves the room for promotion of injection well pressure, can enter low permeability formation well area far away, has ensured the validity of construction.Meanwhile, the slowly broken glue of citric acid capsule, extends the gelation time of gel greatly, has also delayed the rise time of gas simultaneously, reduced the frictional resistance of construction process, be conducive to frothy gel and enter space, improve sweep area, finally realize stable yields.After this frothy gel pumps into stratum, in the earth formation with cross-linking agents, viscosity promotes greatly, thus improve foamy body, can see from table 1, table 2, table 3, this frothy gel is large compared with gas release time high with well temperature compared with high in salinity, and foamy body is large, Increased Plasma Half-life, salt-resistant temperature performance is good.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (7)
1. the slow frothy gel of oil field profile control, it is characterized in that: described frothy gel, by weight percentage, following component is comprised: viscosifying agent: 0.1 ~ 0.3wt%, linking agent A:0.01 ~ 0.03wt%, crosslinking agent B: 0.1 ~ 0.3wt%, auxiliary agent: 0.2 ~ 3.0wt%, gas-evolution agent: 0.6 ~ 9.0wt%, water: 87.37 ~ 98.99wt%.
2. the slow frothy gel of a kind of oil field profile control as claimed in claim 1, is characterized in that: described viscosifying agent is selected from polyacrylamide and derivative thereof.
3. the slow frothy gel of a kind of oil field profile control as claimed in claim 2, it is characterized in that: described polyacrylamide and derivative thereof, its molecular weight is positioned at 5 × 10
6~ 2 × 10
7between.
4. the slow frothy gel of a kind of oil field profile control as claimed in claim 1, is characterized in that: described linking agent A is selected from phenol or Resorcinol.
5. the slow frothy gel of a kind of oil field profile control as claimed in claim 1, is characterized in that: described crosslinking agent B is selected from formaldehyde or hexamethylenetetramine.
6. the slow frothy gel of a kind of oil field profile control as claimed in claim 1, is characterized in that: described auxiliary agent is selected from citric acid capsule or Hydroxycitric acid capsule.
7. the slow frothy gel of a kind of oil field profile control as claimed in claim 1, is characterized in that: described gas-evolution agent is selected from sodium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683200.6A CN105331345A (en) | 2015-10-21 | 2015-10-21 | Retarded foam gel for profile modification of oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510683200.6A CN105331345A (en) | 2015-10-21 | 2015-10-21 | Retarded foam gel for profile modification of oil field |
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| Publication Number | Publication Date |
|---|---|
| CN105331345A true CN105331345A (en) | 2016-02-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510683200.6A Pending CN105331345A (en) | 2015-10-21 | 2015-10-21 | Retarded foam gel for profile modification of oil field |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753305A (en) * | 2016-11-21 | 2017-05-31 | 石亮亮 | A kind of low permeability oil field low damage compound displacement system and preparation method thereof |
| CN106867486A (en) * | 2017-04-21 | 2017-06-20 | 西南石油大学 | A kind of frothy gel well workover method for increasing made with water blockoff connection and its application |
| CN106928945A (en) * | 2017-03-13 | 2017-07-07 | 西南石油大学 | A kind of self-generating foam well killing fluid and preparation method thereof and self-generating foam composition |
| CN110846012A (en) * | 2019-11-25 | 2020-02-28 | 中国石油大学(北京) | Temperature-resistant foam gel and preparation method and application thereof |
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| CN102838978A (en) * | 2012-09-18 | 2012-12-26 | 济南大学 | Preparation method and application of autogeneration gas foam composite oil-displacing agent under shaft |
| CN103834376A (en) * | 2014-02-24 | 2014-06-04 | 中国石油大学(华东) | Self gas generation foam-gel profile control agent prepared from oilfield reinjection water as well as preparation method and application thereof |
| CN104232040A (en) * | 2014-08-15 | 2014-12-24 | 中国地质大学 | Plugging agent for postponing colloid foam and method thereof for oilfield high-water-content aquifer profile modification water plugging |
| CN104342095A (en) * | 2014-11-10 | 2015-02-11 | 中国石油大学(华东) | Expandable self-generated gas foam gel and preparation method and application thereof |
| CN104927817A (en) * | 2014-03-20 | 2015-09-23 | 中国石油化工股份有限公司 | Three-phase self-foaming water-plugging agent |
-
2015
- 2015-10-21 CN CN201510683200.6A patent/CN105331345A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838978A (en) * | 2012-09-18 | 2012-12-26 | 济南大学 | Preparation method and application of autogeneration gas foam composite oil-displacing agent under shaft |
| CN103834376A (en) * | 2014-02-24 | 2014-06-04 | 中国石油大学(华东) | Self gas generation foam-gel profile control agent prepared from oilfield reinjection water as well as preparation method and application thereof |
| CN104927817A (en) * | 2014-03-20 | 2015-09-23 | 中国石油化工股份有限公司 | Three-phase self-foaming water-plugging agent |
| CN104232040A (en) * | 2014-08-15 | 2014-12-24 | 中国地质大学 | Plugging agent for postponing colloid foam and method thereof for oilfield high-water-content aquifer profile modification water plugging |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106753305A (en) * | 2016-11-21 | 2017-05-31 | 石亮亮 | A kind of low permeability oil field low damage compound displacement system and preparation method thereof |
| CN106928945A (en) * | 2017-03-13 | 2017-07-07 | 西南石油大学 | A kind of self-generating foam well killing fluid and preparation method thereof and self-generating foam composition |
| CN106867486A (en) * | 2017-04-21 | 2017-06-20 | 西南石油大学 | A kind of frothy gel well workover method for increasing made with water blockoff connection and its application |
| CN110846012A (en) * | 2019-11-25 | 2020-02-28 | 中国石油大学(北京) | Temperature-resistant foam gel and preparation method and application thereof |
| CN110846012B (en) * | 2019-11-25 | 2020-09-08 | 中国石油大学(北京) | Temperature-resistant foam gel and preparation method and application thereof |
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Application publication date: 20160217 |