CN104212423A - Oil well compound plugging agent and preparation method thereof - Google Patents
Oil well compound plugging agent and preparation method thereof Download PDFInfo
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- CN104212423A CN104212423A CN201410402649.6A CN201410402649A CN104212423A CN 104212423 A CN104212423 A CN 104212423A CN 201410402649 A CN201410402649 A CN 201410402649A CN 104212423 A CN104212423 A CN 104212423A
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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
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/18—Bridging agents, i.e. particles for temporarily filling the pores of a formation; Graded salts
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Abstract
The invention relates to an oil well compound plugging agent and a preparation method thereof, and belongs to the technical field of oil exploitation. The plugging agent comprises the following components by weight: 19-22 parts of acryloyloxyethyl trimethyl ammonium chloride, 1-2 parts of N, N '-methylene bisacrylamide, 40-45 parts of N-isopropylacrylamide, 0.5-2 parts of sodium borohydride, 0.5-1 part of methyl ethyl ketone peroxide, 5-8 parts of nano silica, 1-2 parts of nano titanium dioxide, 2-3 parts of lignin sulfonate, 20-30 parts of a foaming agent, 0.5-1 part of sodium sulfide and 1000-1200 parts of water,. The oil well compound plugging agent is temperature resistant and salt tolerant, the various components are interactive, so that the oil well compound plugging agent has good thixotropy and good mobility, can quickly form network structures in micro cracks and small pores, and can be effectively trapped in a blocking layer; at the same time, the oil well compound plugging agent is simple in preparation method, can realize the reservoir deep profile section, and can be used to improve the oil recovery efficiency.
Description
Technical field
The invention belongs to technical field of petroleum extraction, be specifically related to compound plugging agent of a kind of oil well and preparation method thereof.
Background technology
In oil extraction process, because water layer alters groove, bottom water coning or inject water, limit Shuitu, make some oil well premature water breakthrough or water loggings.In order to remove or reduce water logging, in water production control layer water flowing and change the flow direction of water drive W/O, improve water displacing oil recovery ratio, recovery well or Injection Well carry out the chemical processing agent that Plugging Water Zones section adopts and is called plugging agent.
The oilwell water shutoff agent of current employing mainly contains oil well cement class plugging agent and organic plugging agent.But because the particle of oil well cement can not enter slit passage greatly, and blocking radius is little, and success ratio only has about 30%; Adopt the shutoff of organic plugging agent, due to the impact by himself character, often weather resistance is low, intensity is low, catabiosis is serious, cost is high, and use is restricted.Therefore how overcoming the deficiencies in the prior art is problems that current technical field of petroleum extraction needs solution badly.
Summary of the invention
The object of the invention is to solve the deficiencies in the prior art, providing a kind of oil well compound plugging agent, this plugging agent temperature resistance, salt tolerant, stable system, preparation method is simple, and result of use is good, can realize the deep profile controlling of oil reservoir, in order to improve oil recovery.
The technical solution used in the present invention is as follows:
The compound plugging agent of a kind of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 19-22 part, N, N'-methylene bisacrylamide 1-2 part, NIPA 40-45 part, sodium borohydride 0.5-2 part, methylethyl ketone peroxide 0.5-1 part, nano silicon 5-8 part, nano titanium oxide 1-2 part, sulfonated lignin 2-3 part, pore forming material 20-30 part, sodium sulphite 0.5-1 part, water 1000-1200 part.
Pore forming material described in technical solution of the present invention is α-terpenol.
In technical solution of the present invention, the further preferably described compound plugging agent of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 21 parts, N, N'-methylene bisacrylamide 1.5 parts, NIPA 44 parts, sodium borohydride 0.8 part, methylethyl ketone peroxide 0.9 part, nano silicon 6 parts, nano titanium oxide 1.6 parts, sulfonated lignin 2.5 parts, pore forming material 28 parts, 0.7 part, sodium sulphite, 1100 parts, water.
The present invention also provides the preparation method of the compound plugging agent of a kind of oil well, comprises the steps:
Step (1), in a kettle., NIPA is soluble in water, then add N wherein, the sodium borohydride of N'-methylene bisacrylamide and half, stir at 5-10 DEG C and cause it and dissolve completely;
Step (2), acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide is added in reactor, stir 20-30min at 50-60 DEG C after, standing 30-35min is cooled to 5-10 DEG C, then add nano silicon, sulfonated lignin and second half sodium borohydride more wherein, at 50-60 DEG C, stir 10-15h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 20-30min, then adds pore forming material, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present invention.
In technical solution of the present invention, the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, and the control joining day is 4-6min.
compared with prior art, its beneficial effect is in the present invention:plugging agent temperature resistance of the present invention, salt tolerant, stable system, various interaction between component, makes plugging agent have good thixotropy and mobility, can form spatial grid structure fast, be effectively trapped in plugged zone in microfracture, little duct; Meanwhile, preparation method of the present invention is simple, and result of use is good, can realize the deep profile controlling of oil reservoir, in order to improve oil recovery.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
The compound plugging agent of a kind of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 19 parts, N, N'-methylene bisacrylamide 1 part, NIPA 40 parts, sodium borohydride 0.5 part, methylethyl ketone peroxide 0.5 part, nano silicon 5 parts, nano titanium oxide 1 part, sulfonated lignin 2 parts, α-terpenol 20 parts, 0.5 part, sodium sulphite, 1000 parts, water.
The preparation method of the compound plugging agent of above-mentioned oil well, comprises the steps:
Step (1), in a kettle., NIPA is soluble in water, then add N wherein, the sodium borohydride of N'-methylene bisacrylamide and half, stir at 5 DEG C and cause it and dissolve completely;
Step (2), in reactor, add acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide, stir 20min at 50 DEG C after, standing 30min is cooled to 5 DEG C, then add nano silicon, sulfonated lignin and second half sodium borohydride more wherein, at 50 DEG C, stir 10h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 20min, then adds α-terpenol, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present embodiment;
Wherein, the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, and the control joining day is 4min.
Embodiment 2
The compound plugging agent of a kind of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 22 parts, N, N'-methylene bisacrylamide 2 parts, NIPA 45 parts, sodium borohydride 2 parts, methylethyl ketone peroxide 1 part, nano silicon 8 parts, nano titanium oxide 2 parts, sulfonated lignin 3 parts, α-terpenol 30 parts, 1 part, sodium sulphite, 1200 parts, water.
The preparation method of the compound plugging agent of above-mentioned oil well, comprises the steps:
Step (1), in a kettle., NIPA is soluble in water, then add N wherein, the sodium borohydride of N'-methylene bisacrylamide and half, stir at 10 DEG C and cause it and dissolve completely;
Step (2), in reactor, add acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide, stir 30min at 60 DEG C after, standing 35min is cooled to 10 DEG C, then add nano silicon, sulfonated lignin and second half sodium borohydride more wherein, at 60 DEG C, stir 15h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 30min, then adds α-terpenol, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present embodiment;
Wherein, the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, and the control joining day is 6min.
Embodiment 3
The compound plugging agent of a kind of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 21 parts, N, N'-methylene bisacrylamide 1.5 parts, NIPA 44 parts, sodium borohydride 0.8 part, methylethyl ketone peroxide 0.9 part, nano silicon 6 parts, nano titanium oxide 1.6 parts, sulfonated lignin 2.5 parts, pore forming material 28 parts, 0.7 part, sodium sulphite, 1100 parts, water.
The preparation method of the compound plugging agent of above-mentioned oil well, comprises the steps:
Step (1), in a kettle., NIPA is soluble in water, then add N wherein, the sodium borohydride of N'-methylene bisacrylamide and half, stir at 8 DEG C and cause it and dissolve completely;
Step (2), in reactor, add acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide, stir 25min at 58 DEG C after, standing 32min is cooled to 7 DEG C, then add nano silicon, sulfonated lignin and second half sodium borohydride more wherein, at 56 DEG C, stir 13h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 26min, then adds α-terpenol, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present embodiment; Wherein, the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, and the control joining day is 5min.
Comparative example 1
Comparative example 1 is with the difference of embodiment 3: not containing N, N'-methylene bisacrylamide.
The compound plugging agent of a kind of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 21 parts, NIPA 44 parts, sodium borohydride 0.8 part, methylethyl ketone peroxide 0.9 part, nano silicon 6 parts, nano titanium oxide 1.6 parts, sulfonated lignin 2.5 parts, pore forming material 28 parts, 0.7 part, sodium sulphite, 1100 parts, water.
The preparation method of the compound plugging agent of above-mentioned oil well, comprises the steps:
Step (1), in a kettle., NIPA is soluble in water, then add the sodium borohydride of half wherein, stir at 8 DEG C and cause it and dissolve completely;
Step (2), in reactor, add acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide, stir 25min at 58 DEG C after, standing 32min is cooled to 7 DEG C, then add nano silicon, sulfonated lignin and second half sodium borohydride more wherein, at 56 DEG C, stir 13h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 26min, then adds α-terpenol, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present embodiment; Wherein, the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, and the control joining day is 5min.
Comparative example 2
Comparative example 2 is with the difference of embodiment 3: not containing nano silicon.
The compound plugging agent of a kind of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 21 parts, N, N'-methylene bisacrylamide 1.5 parts, NIPA 44 parts, sodium borohydride 0.8 part, methylethyl ketone peroxide 0.9 part, nano titanium oxide 1.6 parts, sulfonated lignin 2.5 parts, pore forming material 28 parts, 0.7 part, sodium sulphite, 1100 parts, water.
The preparation method of the compound plugging agent of above-mentioned oil well, comprises the steps:
Step (1), in a kettle., NIPA is soluble in water, then add N wherein, the sodium borohydride of N'-methylene bisacrylamide and half, stir at 8 DEG C and cause it and dissolve completely;
Step (2), in reactor, add acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide, stir 25min at 58 DEG C after, standing 32min is cooled to 7 DEG C, then add sulfonated lignin and second half sodium borohydride more wherein, at 56 DEG C, stir 13h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 26min, then adds α-terpenol, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present embodiment; Wherein, the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, and the control joining day is 5min.
Comparative example 3
Comparative example 3 is with the difference of embodiment 3: not containing sulfonated lignin.
The compound plugging agent of a kind of oil well, comprises the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 21 parts, N, N'-methylene bisacrylamide 1.5 parts, NIPA 44 parts, sodium borohydride 0.8 part, methylethyl ketone peroxide 0.9 part, nano silicon 6 parts, nano titanium oxide 1.6 parts, pore forming material 28 parts, 0.7 part, sodium sulphite, 1100 parts, water.
The preparation method of the compound plugging agent of above-mentioned oil well, comprises the steps:
Step (1), in a kettle., NIPA is soluble in water, then add N wherein, the sodium borohydride of N'-methylene bisacrylamide and half, stir at 8 DEG C and cause it and dissolve completely;
Step (2), in reactor, add acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide, stir 25min at 58 DEG C after, standing 32min is cooled to 7 DEG C, then add nano silicon and second half sodium borohydride more wherein, at 56 DEG C, stir 13h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 26min, then adds α-terpenol, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present embodiment; Wherein, the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, and the control joining day is 5min.
Detect the performance of product embodiments 1-3 of the present invention and comparative example 1-3 product, detected result is as shown in table 1.
Table 1
| ? | Water plugging rate, % | Oil plugging rate, % |
| Embodiment 1 | 95.6 | 12.7 |
| Embodiment 2 | 97.7 | 14.5 |
| Embodiment 3 | 98.5 | 13.8 |
| Comparative example 1 | 85.6 | 14.6 |
| Comparative example 2 | 86.9 | 15.3 |
| Comparative example 3 | 83.5 | 14.8 |
As can be seen from the table, the plugging agent of embodiment 1-3 all has very strong water shut-off, and the effect in comparative example 1, comparative example 2 and comparative example 3 is inferior to embodiment; Embodiment 3 is optimum embodiments of the present invention.
Claims (5)
1. the compound plugging agent of oil well, is characterized in that comprising the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 19-22 part, N, N'-methylene bisacrylamide 1-2 part, NIPA 40-45 part, sodium borohydride 0.5-2 part, methylethyl ketone peroxide 0.5-1 part, nano silicon 5-8 part, nano titanium oxide 1-2 part, sulfonated lignin 2-3 part, pore forming material 20-30 part, sodium sulphite 0.5-1 part, water 1000-1200 part.
2. the compound plugging agent of oil well according to claim 1, is characterized in that described pore forming material is α-terpenol.
3. the compound plugging agent of oil well according to claim 1, is characterized in that comprising the following component according to weight parts:
Acrylyl oxy-ethyl-trimethyl salmiac 21 parts, N, N'-methylene bisacrylamide 1.5 parts, NIPA 44 parts, sodium borohydride 0.8 part, methylethyl ketone peroxide 0.9 part, nano silicon 6 parts, nano titanium oxide 1.6 parts, sulfonated lignin 2.5 parts, pore forming material 28 parts, 0.7 part, sodium sulphite, 1100 parts, water.
4. the preparation method of the compound plugging agent of oil well according to claim 1, is characterized in that comprising the steps:
Step (1), in a kettle., NIPA is soluble in water, then add N wherein, the sodium borohydride of N'-methylene bisacrylamide and half, stir at 5-10 DEG C and cause it and dissolve completely;
Step (2), acrylyl oxy-ethyl-trimethyl salmiac and methylethyl ketone peroxide is added in reactor, stir 20-30min at 50-60 DEG C after, standing 30-35min is cooled to 5-10 DEG C, then add nano silicon, sulfonated lignin and second half sodium borohydride more wherein, at 50-60 DEG C, stir 10-15h;
Step (3), adds sodium sulphite, nano titanium oxide in reactor, after stirring 20-30min, then adds pore forming material, continues to be stirred to mix, and namely obtains the compound plugging agent of oil well of the present invention.
5. the preparation method of the compound plugging agent of oil well according to claim 5, it is characterized in that the middle sodium borohydride of step (1) neutralization procedure (2) adds fashionable being and slowly adds, the control joining day is 4-6min.
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| CN106634904A (en) * | 2016-11-10 | 2017-05-10 | 仇颖超 | Preparation method of high-temperature and high-salinity water shutoff agent special for oil well |
| CN106800921A (en) * | 2016-12-02 | 2017-06-06 | 长江大学 | Wide temperature high salinity adjusts stifled all-round frozen glue |
| CN108587585A (en) * | 2018-05-30 | 2018-09-28 | 中国石油大学(华东) | Profile-controlling and plugging agent and application, profile control and water plugging system and its preparation method and application |
| CN111635748A (en) * | 2020-06-08 | 2020-09-08 | 天津益创能源科技有限公司 | Viscoelastic particle oil displacement agent with water plugging function |
| CN112210357A (en) * | 2020-10-23 | 2021-01-12 | 中国石油大学(华东) | W/O/W type multiple emulsion water shutoff system and preparation method thereof |
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| CN111635748A (en) * | 2020-06-08 | 2020-09-08 | 天津益创能源科技有限公司 | Viscoelastic particle oil displacement agent with water plugging function |
| CN112210357A (en) * | 2020-10-23 | 2021-01-12 | 中国石油大学(华东) | W/O/W type multiple emulsion water shutoff system and preparation method thereof |
| CN112210357B (en) * | 2020-10-23 | 2023-03-03 | 中国石油大学(华东) | W/O/W type multiple emulsion water shutoff system and preparation method thereof |
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