CN112251201A - Resin plugging agent based on emulsion deformation, preparation method and application - Google Patents
Resin plugging agent based on emulsion deformation, preparation method and application Download PDFInfo
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- CN112251201A CN112251201A CN202011132628.9A CN202011132628A CN112251201A CN 112251201 A CN112251201 A CN 112251201A CN 202011132628 A CN202011132628 A CN 202011132628A CN 112251201 A CN112251201 A CN 112251201A
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- epoxy resin
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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
- C09K8/5086—Compositions based on water or polar solvents containing organic compounds macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
Abstract
The invention provides a resin plugging agent based on emulsion modification, a preparation method and application; consists of an epoxy resin system, an emulsifier system and a brine system; 40% of an epoxy resin system; 10% of an emulsifier system; the brine system is 50%. The invention also relates to a preparation method and application of the resin plugging agent. The resin profile control system based on the emulsion modification is used for profile control operation of a fractured oil reservoir. The invention has the following advantages: at room temperature, the system is a stable resin-in-water type emulsion, the viscosity of the system is low, and the injectability is good; at high temperature, the system is inverted into a water-in-resin emulsion, and the system has high overall strength after being cured and good profile control effect.
Description
Technical Field
The present invention relates to the field of oilfield chemistry; in particular to a resin plugging agent based on emulsion modification, a preparation method and application.
Background
In the process of developing the fractured oil reservoir, injected water is easy to flow along the fractures, and ineffective water injection is caused. Therefore, a profile control operation is required.
The resin profile control agent has the advantage of high strength, and is an excellent profile control agent for channels requiring a high strength profile control agent.
However, when the resin is used as a profile control agent, the resin is severely limited in application as a profile control agent due to its high viscosity and poor injection performance. In addition, the use of resin alone as a profile control agent is costly due to the high price of the resin. Both of these aspects severely limit the field application of the resin as a profile control agent.
Disclosure of Invention
The invention aims to provide a resin plugging agent based on emulsion modification, a preparation method and application.
The invention is realized by the following technical scheme:
in a first aspect, the present invention relates to a resin plugging agent based on emulsion modification, consisting of an epoxy resin system, an emulsifier system and a brine system;
wherein: the components are composed of the following weight percentages:
40% of an epoxy resin system;
10% of an emulsifier system;
the brine system is 50%.
Preferably, the epoxy resin system consists of an epoxy resin and a high temperature curing agent;
wherein the content of the first and second substances,
the epoxy resin is epoxy resin E44, and the mass of the epoxy resin accounts for 85% of that of an epoxy resin system;
the high-temperature curing agent is methyl tetrahydrophthalic anhydride and 2,4, 6-tri (dimethylaminomethyl) -phenol; the methyl tetrahydrophthalic anhydride accounts for 12-14% of the epoxy resin system, and the 2,4, 6-tris (dimethylaminomethyl) -phenol accounts for 1-3% of the epoxy resin system.
Preferably, the emulsifier system consists of sodium dodecyl diphenyl ether disulfonate, castor oil polyoxyethylene ether EL-80 and dodecyl hydroxysulfobetaine;
wherein the content of the first and second substances,
the mass of the sodium dodecyl diphenyl ether disulfonate accounts for 50 to 60 percent of the emulsifier system;
the mass of the castor oil polyoxyethylene ether EL-80 accounts for 20-30% of that of the emulsifier system;
the balance being dodecyl hydroxysulfobetaine.
Preferably, the saline water system is a mixed solution of sodium chloride and calcium chloride (mixed in any proportion) with the mineralization degree not higher than 250000 mg/L.
In a second aspect, the present invention also relates to a method for preparing the aforementioned resin plugging agent based on emulsion modification, comprising the following steps:
step 1: mixing the emulsifier system with the epoxy resin system, and stirring by using a stirrer until the emulsifier system is completely dissolved in the epoxy resin system;
step 2: heating the system to 50 ℃;
step 3: stirring the above system with a stirrer at 1000 rpm;
step 4: injecting a saline water system into the system at a constant speed by using a syringe pump so as to form a resin-in-water emulsion;
step 5: placing the resin-in-water emulsion in a thermostat at 130 ℃, converting into resin-in-water type emulsion after 24 hours, and curing the resin;
the weight percentage of each component is as follows:
40% of an epoxy resin system;
10% of an emulsifier system;
50% of a saline system;
the epoxy resin system consists of epoxy resin and a high-temperature curing agent;
wherein the content of the first and second substances,
the epoxy resin is epoxy resin E44, and the mass of the epoxy resin accounts for 85% of that of an epoxy resin system;
the high-temperature curing agent is methyl tetrahydrophthalic anhydride and 2,4, 6-tri (dimethylaminomethyl) -phenol; the methyl tetrahydrophthalic anhydride accounts for 12-14% of the epoxy resin system, and the 2,4, 6-tris (dimethylaminomethyl) -phenol accounts for 1-3% of the epoxy resin system;
the emulsifier system consists of sodium dodecyl diphenyl ether disulfonate, castor oil polyoxyethylene ether EL-80 and dodecyl hydroxysulfobetaine;
wherein the content of the first and second substances,
the mass of the sodium dodecyl diphenyl ether disulfonate accounts for 50 to 60 percent of the emulsifier system;
the mass of the castor oil polyoxyethylene ether EL-80 accounts for 20-30% of that of the emulsifier system;
the balance being dodecyl hydroxysulfobetaine.
The saline water system is a mixed solution of sodium chloride and calcium chloride (mixed in any proportion) with the mineralization degree not higher than 250000 mg/L.
In a third aspect, the invention also relates to the application of the resin plugging agent based on the emulsion modification, which is used for the profile control operation of a fractured reservoir.
The invention has the following advantages:
(1) at room temperature, the system is a stable resin-in-water type emulsion, the viscosity of the system is low, and the injectability is good;
(2) at high temperature, the system is inverted into a water-in-resin emulsion, and the system has high overall strength after being cured and good profile control effect.
Detailed Description
The present invention will be described in detail with reference to specific examples. It should be noted that the following examples are only illustrative of the present invention, but the scope of the present invention is not limited to the following examples.
Example 1
The embodiment relates to a resin plugging agent based on emulsion modification, which consists of an epoxy resin system, an emulsifier system and a brine system;
wherein: the components are composed of the following weight percentages:
40% of an epoxy resin system;
10% of an emulsifier system;
the brine system is 50%.
1. Epoxy resin system
The epoxy resin system consists of epoxy resin and a high-temperature curing agent, wherein the epoxy resin is epoxy resin E44, the mass of the epoxy resin accounts for 85% of that of the epoxy resin system, the high-temperature curing agent is methyl tetrahydrophthalic anhydride and 2,4, 6-tris (dimethylaminomethyl) -phenol, the methyl tetrahydrophthalic anhydride accounts for 12% -14% of the epoxy resin system, and the 2,4, 6-tris (dimethylaminomethyl) -phenol accounts for 1% -3% of the epoxy resin system.
In this example, 34g of epoxy resin, 5.6g of methyl tetrahydrophthalic anhydride and 0.4g of 2,4, 6-tris (dimethylaminomethyl) phenol were used.
2. Emulsifier system
The emulsifier system consists of sodium dodecyl diphenyl ether disulfonate, castor oil polyoxyethylene ether EL-80 and dodecyl hydroxysulfobetaine, wherein the mass of the sodium dodecyl diphenyl ether disulfonate accounts for 50-60 percent of the emulsifier system, the mass of the castor oil polyoxyethylene ether EL-80 accounts for 20-30 percent of the emulsifier system, and the balance is the dodecyl hydroxysulfobetaine.
In this example, 5g of sodium dodecyl diphenyl ether disulfonate, 803g of castor oil polyoxyethylene ether EL-803 and 2g of dodecyl hydroxysulfobetaine were taken.
3. Salt water system
The saline water system is a mixed solution of sodium chloride and calcium chloride with the mineralization degree not higher than 250000 mg/L.
Secondly, the embodiment relates to a preparation method of a resin plugging agent based on emulsion modification;
the method comprises the following steps:
step 1: mixing
Mixing the emulsifier system with the epoxy resin system, and stirring by using a stirrer until the emulsifier system is completely dissolved in the epoxy resin system;
step 2: heating of
Heating the system to 50 ℃;
step 3: stirring the mixture
Stirring the above system with a stirrer at 1000 rpm;
step 4: emulsification
Injecting a saline water system into the system at a constant speed by using a syringe pump so as to form a resin-in-water emulsion;
step 5: modification of heated emulsions
And (3) placing the resin-in-water emulsion in a constant temperature box at 130 ℃, performing phase inversion to obtain a resin-in-water type emulsion after 24 hours, and curing the resin.
The preparation method adopts the following components:
1. epoxy resin system
The epoxy resin system consists of epoxy resin and a high-temperature curing agent, wherein the epoxy resin is epoxy resin E44, the mass of the epoxy resin accounts for 85% of that of the epoxy resin system, the high-temperature curing agent is methyl tetrahydrophthalic anhydride and 2,4, 6-tris (dimethylaminomethyl) -phenol, the methyl tetrahydrophthalic anhydride accounts for 12% -14% of the epoxy resin system, and the 2,4, 6-tris (dimethylaminomethyl) -phenol accounts for 1% -3% of the epoxy resin system.
In this example, 34g of epoxy resin, 5.6g of methyl tetrahydrophthalic anhydride and 0.4g of 2,4, 6-tris (dimethylaminomethyl) phenol were used.
2. Emulsifier system
The emulsifier system consists of sodium dodecyl diphenyl ether disulfonate, castor oil polyoxyethylene ether EL-80 and dodecyl hydroxysulfobetaine, wherein the mass of the sodium dodecyl diphenyl ether disulfonate accounts for 50-60 percent of the emulsifier system, the mass of the castor oil polyoxyethylene ether EL-80 accounts for 20-30 percent of the emulsifier system, and the balance is the dodecyl hydroxysulfobetaine.
In this example, 5g of sodium dodecyl diphenyl ether disulfonate, 803g of castor oil polyoxyethylene ether EL-803 and 2g of dodecyl hydroxysulfobetaine were taken.
3. Salt water system
The saline water system is a mixed solution of sodium chloride and calcium chloride with the mineralization degree not higher than 250000 mg/L.
Third, application
The resin profile control system based on emulsion modification prepared by the method provided by the invention is mainly used for profile control operation of a fracture oil reservoir.
The using method comprises the following steps: mixing a resin system and an emulsifier system according to a mass ratio of 4:1, stirring the mixture by using a stirrer in a room until the emulsifier system is completely dissolved in the epoxy resin system, heating the system to 50 ℃, stirring the system by using the stirrer at a speed of 1000 revolutions per minute, and injecting a saline water system into the system at a constant speed by using a syringe pump, thereby forming a resin-in-water emulsion. The above plug system was injected into a metal tube with an inner diameter of 3mm using an advection pump at a flow rate of 0.5ml/min, then both ends of the metal tube were sealed and placed in an oven at 130 ℃ to heat, and after 24h the system was deformed and cured.
And then, continuously injecting water at the flow rate of 0.5ml/min by using a constant flow pump, and measuring the pressure difference when the injected water breaks through to be 4 MPa.
Thus, the method provided by the invention can be used for generating a high-strength profile control agent.
The invention has the following advantages:
(1) at room temperature, the system is a stable resin-in-water type emulsion, the viscosity of the system is low, and the injectability is good;
(2) at high temperature, the system is inverted into a water-in-resin emulsion, and the system has high overall strength after being cured and good profile control effect.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (9)
1. The resin plugging agent based on emulsion modification is characterized by consisting of an epoxy resin system, an emulsifier system and a brine system;
wherein: the components are composed of the following weight percentages:
40% of an epoxy resin system;
10% of an emulsifier system;
the brine system is 50%.
2. The emulsion-variant-based resin plugging agent of claim 1, wherein the epoxy resin system consists of an epoxy resin and a high temperature curing agent;
wherein the content of the first and second substances,
the epoxy resin is epoxy resin E44, and the mass of the epoxy resin accounts for 85% of that of an epoxy resin system;
the high-temperature curing agent is methyl tetrahydrophthalic anhydride and 2,4, 6-tri (dimethylaminomethyl) -phenol; the methyl tetrahydrophthalic anhydride accounts for 12-14% of the epoxy resin system, and the 2,4, 6-tris (dimethylaminomethyl) -phenol accounts for 1-3% of the epoxy resin system.
3. The emulsion-variant-based resin plugging agent of claim 1, wherein the emulsifier system consists of sodium dodecyl diphenyl ether disulfonate, castor oil polyoxyethylene ether EL-80, and dodecyl hydroxysulfobetaine;
wherein the content of the first and second substances,
the mass of the sodium dodecyl diphenyl ether disulfonate accounts for 50 to 60 percent of the emulsifier system;
the mass of the castor oil polyoxyethylene ether EL-80 accounts for 20-30% of that of the emulsifier system;
the balance being dodecyl hydroxysulfobetaine.
4. The emulsion-based resinous plugging agent of claim 1 wherein the saline system is a mixed solution of sodium chloride and calcium chloride having a degree of mineralization of not more than 250000 mg/L.
5. The method for preparing the resin plugging agent based on the emulsion modification according to claim 1, comprising the steps of:
step 1: mixing the emulsifier system with the epoxy resin system, and stirring by using a stirrer until the emulsifier system is completely dissolved in the epoxy resin system;
step 2: heating the system to 50 ℃;
step 3: stirring the above system with a stirrer at 1000 rpm;
step 4: injecting a saline water system into the system at a constant speed by using a syringe pump so as to form a resin-in-water emulsion;
step 5: placing the resin-in-water emulsion in a thermostat at 130 ℃, converting into resin-in-water type emulsion after 24 hours, and curing the resin;
the weight percentage of each component is as follows:
40% of an epoxy resin system;
10% of an emulsifier system;
the brine system is 50%.
6. The method of claim 5, wherein the epoxy resin system comprises an epoxy resin and a high temperature curing agent;
wherein the content of the first and second substances,
the epoxy resin is epoxy resin E44, and the mass of the epoxy resin accounts for 85% of that of an epoxy resin system;
the high-temperature curing agent is methyl tetrahydrophthalic anhydride and 2,4, 6-tri (dimethylaminomethyl) -phenol; the methyl tetrahydrophthalic anhydride accounts for 12-14% of the epoxy resin system, and the 2,4, 6-tris (dimethylaminomethyl) -phenol accounts for 1-3% of the epoxy resin system.
7. The method for preparing a resin plugging agent based on emulsion modification according to claim 5, wherein the emulsifier system is composed of sodium dodecyl diphenyl ether disulfonate, castor oil polyoxyethylene ether EL-80, and dodecyl hydroxysulfobetaine;
wherein the content of the first and second substances,
the mass of the sodium dodecyl diphenyl ether disulfonate accounts for 50 to 60 percent of the emulsifier system;
the mass of the castor oil polyoxyethylene ether EL-80 accounts for 20-30% of that of the emulsifier system;
the balance being dodecyl hydroxysulfobetaine.
8. The method for preparing the resin plugging agent based on the emulsion modification of claim 5, wherein the saline system is a mixed solution of sodium chloride and calcium chloride with a mineralization degree of not more than 250000 mg/L.
9. The use of the creamy resin plugging agent according to claim 1, wherein the creamy resin plugging agent is used for profile control of fractured reservoirs.
Priority Applications (1)
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| CN202011132628.9A CN112251201A (en) | 2020-10-21 | 2020-10-21 | Resin plugging agent based on emulsion deformation, preparation method and application |
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| CN202011132628.9A CN112251201A (en) | 2020-10-21 | 2020-10-21 | Resin plugging agent based on emulsion deformation, preparation method and application |
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| CN113025293A (en) * | 2021-05-20 | 2021-06-25 | 天津硕泽工程技术有限公司 | Epoxy resin self-generated particle profile adjusting system and application thereof |
| CN113322058A (en) * | 2021-06-30 | 2021-08-31 | 中国石油大学(华东) | Phase change proppant applied to sea area environment and preparation method thereof |
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