CN107663449A - A kind of efficient cleanup additive of nano emulsion type - Google Patents
A kind of efficient cleanup additive of nano emulsion type Download PDFInfo
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- CN107663449A CN107663449A CN201610600871.6A CN201610600871A CN107663449A CN 107663449 A CN107663449 A CN 107663449A CN 201610600871 A CN201610600871 A CN 201610600871A CN 107663449 A CN107663449 A CN 107663449A
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- cleanup additive
- emulsion type
- nano emulsion
- efficient cleanup
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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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
- C09K8/76—Eroding chemicals, e.g. acids combined with additives added for specific purposes for preventing or reducing fluid loss
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- General Chemical & Material Sciences (AREA)
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Abstract
The present invention discloses efficient cleanup additive of a kind of nano emulsion type and preparation method thereof, belongs to technical field of petrochemical industry.The efficient cleanup additive of the nano emulsion type, component is as follows, is weight percentage：Gemini surface active agent：20~25%；Solubilizer：3~5%；Oil phase：15~20%；Aqueous phase：40~57%；Inorganic electrolyte：5~10%.Methods described includes：Host Gemini surface active agent, solubilizer and oil phase are added into reactor；Well mixed, heating keeps reactor temperature then to add water and inorganic electrolyte at 60 70 DEG C；The lower reaction of stirring 12 hours, obtains light yellow transparent liquid.The efficient cleanup additive of nano emulsion type of the present invention, which has, repairs reservoir permeability function, compared with current cleanup additive system, can reduce the nearly well of Oil/gas Well in well fracturing acidization band water lock, residue and formation fluid be incompatible caused by reservoir damage degree more than 30%.
Description
Technical field
The present invention relates to efficient cleanup additive of a kind of nano emulsion type and preparation method and application, belong to petrochemical technology
Field.
Background technology
Unconventional energy resource gas (including shale gas, coal bed gas, compact sandstone gas) proportion in energy general layout increases year by year
Add.China's unconventional energy resource gas is developed also just in progress like a raging fire, as unconventional energy resource gas important component
Shale gas, many exploitation problems are also faced with while a series of achievements are achieved.The shale gas reserves in China are huge, page
Rock gas reservoir has the characteristics of low-porosity, low-permeability, and the diffusion and migration of gas are slow, and fracturing reform is shale gas well development
The necessary links gone into operation.But fracturing reform can introduce a large amount of fracturing fluids and enter shale formation, because the low hole of shale formation is low
The characteristics of oozing, caused fracturing fluid liquid phase residual problem is extremely serious, the liquid meeting being trapped in coal petrography hole, hugger, crack
The desorption of shale gas and the migration of gas are hindered, reduces gas phase relative permeability, causes well or even occur that fracturing reform is crossed
Underproduction phenomenon.Relying primarily on surfactant at present reduces interfacial tension to solve the problems, such as the row of returning, but the row of returning is led than relatively low, substantially
Below 50%.Foreign countries had been reported that in recent years, can be solved very well using microemulsion as cleanup additive " the phase trap " of fracturing fluid
Problem, microemulsion cleanup additive increase the contact angle of fracturing fluid and rock surface, simultaneously because micro- by reducing surface tension of liquid
The less particle diameter of emulsion acts on smaller blowhole, so as to reduce water blocking damage, increases gas well yield.Effect of field application
Show, microemulsion cleanup additive increases substantially fracturing fluid recovery (backflow) efficiency, increases gas well yield.Microemulsion be by surfactant,
The thermodynamic stable system of cosurfactant, oil and water composition, appearance is an optically isotropic phase.Root of the present invention
According to Gemini surface active agent, auxiliary agent, oil phase and inorganic electrolyte is screened the characteristics of shale formation, it is efficient nano emulsion type has been synthesized
Cleanup additive, the peak diameter of emulsion is determined in 20-100nm.Prepared nanoemulsions cleanup additive outward appearance is pale yellow transparent liquid
Body, its 0.1% aqueous solution surface tension are 28mN/m or so, and nanoemulsions are tiling shape absorption in shale surface, increase ground
Layer fluid and shale contact angle.Gravity drive the row of returning experiment show nanoemulsions cleanup additive compared with stratum water return row's efficiency raising 40% with
On, more conventional surfactant improves more than 30%；Gas drive returns row and tests the gas shown under nanoemulsions cleanup additive unit pressure difference
Drive returns the more conventional cleanup additive of row's efficiency and improves 25% or so.Nano-emulsion cleanup additive and polymeric system compatibility are good；Injury is surveyed
Take temperature bright, nanoemulsions cleanup additive core damage rate is 5.62%, reduces by 35% or so compared with stratum water, injury is relatively low.
The content of the invention
The present invention relates to efficient cleanup additive of a kind of nano emulsion type and preparation method thereof, belong to technical field of petrochemical industry.
The efficient cleanup additive of the nano emulsion type, component is as follows, is weight percentage：Gemini surface active agent：20~25%；Solubilising
Agent：3~5%；Oil phase：15~20%；Aqueous phase：40~57%；Inorganic electrolyte：5~10%.Methods described includes：To reaction
Host Gemini surface active agent, solubilizer and oil phase are added in device；Well mixed, heating keeps reactor temperature in 60-70
DEG C, then add water and inorganic electrolyte；Stirring lower reaction 1-2 hours, obtain colourless transparent liquid；Nano-emulsion of the present invention
The efficient cleanup additive of liquid type have repair reservoir permeability function, with it is current help isostere system compared with, can reduce well fracturing acidifying
During Oil/gas Well nearly well band water lock, residue and formation fluid be incompatible caused by reservoir damage degree more than 80%.
Described component Gemini surface active agent is double APESs, and structural formula is as follows：
Wherein, two serial middle spacer groups are different：N=2,4 (mid methylenes numbers)；Each serial epoxy second
Alkane chain number is different：M=4,6,8,10,12
Described component solubilizer is alcohols, and structural formula is as follows：CH3(CH2)nOH
Wherein, n 0-3.
Described component oil phase is dihydro jasmone.
Described component inorganic electrolyte is sodium chloride or calcium chloride.
The positive effect of the present invention is：Compared with prior art, nano emulsion type cleanup additive provided by the invention, overcome often
The shortcomings that single surfactant type cleanup additive of rule, nanoemulsions cleanup additive return row's efficiency compared with stratum water and improve more than 40%,
More conventional surfactant improves more than 30%；Gas drive returns row's experiment and shows that the gas drive under nanoemulsions cleanup additive unit pressure difference is returned
Arrange the more conventional cleanup additive of efficiency and improve 25% or so.Nano-emulsion cleanup additive and polymeric system compatibility are good；Core injury is surveyed
Take temperature bright, nanoemulsions cleanup additive core damage rate is 5.62%, reduces by 15% or so compared with stratum water, injury is relatively low..
Embodiment
【Embodiment 1】
Synthetic method：The double APESs (m=8, n=2) of Gemini surface active agent are added into reactor
24%th, solubilizer methanol 5%, and oil phase dihydro jasmone 16%；Well mixed, heating keeps reactor temperature in 60-70
DEG C, then add water 48% and sodium chloride 7%；Stirring lower reaction 1-2 hours, obtain light yellow transparent liquid.
The sample is subjected to performance test, the results are shown in Table 1：
| Project | Index |
| Density (20 DEG C ± 1 DEG C), g/cm3 | 1.03 |
| PH value | 7.0 |
| Surface tension (0.1% dosage), mN/m | 27.3 |
| Interfacial tension (0.1% dosage, with kerosene) mN/m | 1.84 |
| The row of returning leads, % | 83.1 |
| Core injury rate, % | 4.87 |
【Embodiment 2】
Synthetic method：The double APESs (m=10, n=2) of Gemini surface active agent are added into reactor
26%th, solubilizer isopropanol 6%, and oil phase dihydro jasmone 18%；Well mixed, heating keeps reactor temperature in 60-
70 DEG C, then add water 42% and sodium chloride 8%；Stirring lower reaction 1-2 hours, obtain light yellow transparent liquid.
The sample is subjected to performance test, the results are shown in Table 2：
| Project | Index |
| Density (20 DEG C ± 1 DEG C), g/cm3 | 1.05 |
| PH value | 7.0 |
| Surface tension (0.1% dosage), mN/m | 26.1 |
| Interfacial tension (0.1% dosage, with kerosene) mN/m | 1.52 |
| The row of returning leads, % | 86.9 |
| Core injury rate, % | 4.25 |
【Embodiment 3】
Synthetic method：The double APESs (m=12, n=4) of Gemini surface active agent are added into reactor
20%th, solubilizer ethanol 6%, and oil phase dihydro jasmone 15%；Well mixed, heating keeps reactor temperature in 60-70
DEG C, then add water 51% and calcium chloride 8%；Stirring lower reaction 1-2 hours, obtain light yellow transparent liquid.
The sample is subjected to performance test, the results are shown in Table 3：
Particular embodiments described above, pair present invention solves the technical problem that, technical scheme and beneficial effect are carried out
It is further described, should be understood that above-described is only the specific embodiment of the present invention, be not limited to
The present invention, within the spirit and principles of the invention, any modification equivalent substitution for being made, improvement etc., it should be included in this
In the protection domain of invention.
Claims (5)
1. the present invention relates to efficient cleanup additive of a kind of nano emulsion type and preparation method thereof, belong to technical field of petrochemical industry.Should
The efficient cleanup additive of nano emulsion type, component is as follows, is weight percentage：Gemini surface active agent：20~25%；Solubilizer：3
~5%；Oil phase：15~20%；Aqueous phase：40~57%；Inorganic electrolyte：5~10%.Methods described includes：Into reactor
Add host Gemini surface active agent, solubilizer and oil phase；Well mixed, heating keeps reactor temperature at 60-70 DEG C, so
Water and inorganic electrolyte are added afterwards；Stirring lower reaction 1-2 hours, obtain light yellow transparent liquid.Nanoemulsions of the present invention
The efficient cleanup additive of type, which has, repairs reservoir permeability function, compared with current cleanup additive system, can reduce well fracturing acidifying
During Oil/gas Well nearly well band water lock, residue and formation fluid be incompatible caused by reservoir damage degree more than 30%.
2. the efficient cleanup additive of nano emulsion type as claimed in claim 1, it is characterised in that：Described component Gemini surface active
Agent is double APESs, and structural formula is as follows：
Wherein, two serial middle spacer groups are different：N=2,4 (mid methylenes numbers)；Each serial ethylene oxide chain
Number is different：M=4,6,8,10,12.
3. the efficient cleanup additive of nano emulsion type as claimed in claim 1, it is characterised in that：Described component solubilizer is alcohol
Class, structural formula are as follows：CH3(CH2)nOH
Wherein, n 0-3.
4. the efficient cleanup additive of nano emulsion type as claimed in claim 1, it is characterised in that：Described component oil phase is dihydro jasmine
Jasmine ketone.
5. the efficient cleanup additive of nano emulsion type as claimed in claim 1, it is characterised in that：Described component inorganic electrolyte is
Sodium chloride or calcium chloride.
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| CN201610600871.6A CN107663449A (en) | 2016-07-28 | 2016-07-28 | A kind of efficient cleanup additive of nano emulsion type |
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| CN201610600871.6A CN107663449A (en) | 2016-07-28 | 2016-07-28 | A kind of efficient cleanup additive of nano emulsion type |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109678720A (en) * | 2019-01-02 | 2019-04-26 | 中国石油天然气股份有限公司 | (octyl phenol polyoxyethylene ether disubstituted) diphenyl ether diformate nonionic gemini surfactant and synthesis thereof |
| CN110821461A (en) * | 2019-10-28 | 2020-02-21 | 中国石油化工股份有限公司 | Composite water lock releasing process for low-permeability oil well |
| CN111303855A (en) * | 2020-04-09 | 2020-06-19 | 四川捷贝通能源科技有限公司 | Nano emulsion miscible oil displacement agent and preparation method thereof |
| CN112280549A (en) * | 2020-09-28 | 2021-01-29 | 长江大学 | Nano emulsion and fracturing method |
| CN113088273A (en) * | 2021-04-07 | 2021-07-09 | 北京首科油源科技有限公司 | Preparation method of nano microcapsule fracturing fluid and fracturing fluid performance evaluation method |
| US11097239B2 (en) | 2019-01-02 | 2021-08-24 | Petrochina Company Limited | Core-shell structured non-ionic nanoemulsion system and preparation and use thereof |
| CN114045163A (en) * | 2021-11-10 | 2022-02-15 | 捷贝通石油技术集团股份有限公司 | Preparation method of nano permeation-enhancing desorbent for increasing yield of shale gas |
| CN116731698A (en) * | 2023-06-12 | 2023-09-12 | 中海油田服务股份有限公司 | Multi-effect nanoemulsion and its preparation method, use method and application |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109678720A (en) * | 2019-01-02 | 2019-04-26 | 中国石油天然气股份有限公司 | (octyl phenol polyoxyethylene ether disubstituted) diphenyl ether diformate nonionic gemini surfactant and synthesis thereof |
| CN109678720B (en) * | 2019-01-02 | 2021-07-02 | 中国石油天然气股份有限公司 | (octyl phenol polyoxyethylene ether disubstituted) diphenyl ether diformate nonionic gemini surfactant and synthesis thereof |
| US11097239B2 (en) | 2019-01-02 | 2021-08-24 | Petrochina Company Limited | Core-shell structured non-ionic nanoemulsion system and preparation and use thereof |
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| CN110821461A (en) * | 2019-10-28 | 2020-02-21 | 中国石油化工股份有限公司 | Composite water lock releasing process for low-permeability oil well |
| CN110821461B (en) * | 2019-10-28 | 2021-11-30 | 中国石油化工股份有限公司 | Composite water lock releasing process for low-permeability oil well |
| CN111303855A (en) * | 2020-04-09 | 2020-06-19 | 四川捷贝通能源科技有限公司 | Nano emulsion miscible oil displacement agent and preparation method thereof |
| CN112280549A (en) * | 2020-09-28 | 2021-01-29 | 长江大学 | Nano emulsion and fracturing method |
| CN112280549B (en) * | 2020-09-28 | 2023-05-23 | 长江大学 | Nanoemulsion and fracturing method |
| CN113088273A (en) * | 2021-04-07 | 2021-07-09 | 北京首科油源科技有限公司 | Preparation method of nano microcapsule fracturing fluid and fracturing fluid performance evaluation method |
| CN114045163A (en) * | 2021-11-10 | 2022-02-15 | 捷贝通石油技术集团股份有限公司 | Preparation method of nano permeation-enhancing desorbent for increasing yield of shale gas |
| CN116731698A (en) * | 2023-06-12 | 2023-09-12 | 中海油田服务股份有限公司 | Multi-effect nanoemulsion and its preparation method, use method and application |
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Application publication date: 20180206 |