CN106281284A - A kind of foam flooding foaming agent and preparation method thereof - Google Patents
A kind of foam flooding foaming agent and preparation method thereof Download PDFInfo
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- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
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Abstract
The invention discloses a kind of applicable foam flooding foaming agent and preparation method thereof.With alkyl acyl propylsultaine glycine betaine as solvent, mass percent is: 2%～40%；Aliphatic alcohol polyoxyethylene sulfonate mass percent is: 1%～20%；Alkyl betaine mass percent is: 1%～10%；Fluorine carbon surfactant qualities percentage ratio is: 1%～5%；Water surplus.At 50 DEG C, it is slowly stirred to being completely dissolved, to obtain final product.80～100 DEG C, under 80000ppm, its foaming volume is up to more than 650mL, and half foam life period is at more than 28min, and lab simulation improves recovery ratio and reaches more than 16%.Frothing capacity of the present invention is excellent, and can form stable foam, has the abilities such as stronger heatproof, anti-salt, meets the needs of oil field development.
Description
Technical field
The present invention relates to one and be applicable to oilfield exploitation use, there is excellent foam flooding foaming agent of heatproof, anti-salt property and excellent foaming characteristic and foam stability and preparation method thereof.
Background technology
Foam flooding due to its good sealing characteristics and to the selectivity of profit it is considered to be a tertiary oil recovery mode the most promising.Improve the main mechanism of oil recovery factor be improved displacement of reservoir oil sweep area (sweep efficiency) and improve two aspects of oil displacement efficiency.Aerated fluid has both characteristics simultaneously.Foam flooding is to utilize various gas (nitrogen, carbon dioxide, air or other gas) and foam to be mixed to form the foam displacement method as body medium, and foam has the not stifled oil of selective shut-off, water blockoff, the characteristic of blocking high not low blocking.
Document is recorded Fried in 1956 and foam flooding has been carried out research first, Bond in 1958 et al. has delivered the patent of first part of foam flooding in the world, 1964 to 1967 American Association oil companies are carried out in Siggins oil field, Illinois, achieve good effect water-oil factor and drop to 12% from 15%.1994, Britain and Norway carried out the experimental study of 4 years by a definite date in 3 trial zones in oil field, the North Sea to foam, have studied foam and become to produce well coning and the improvement result of fingering to high GOR.
China's nineteen sixty-five has carried out domestic first foam stability test at Yumen over-aged bulk carriers, has certain effect, but production status is undesirable.Baise Oilfield is tested with within 1996, having carried out the air foam displacement of reservoir oil, have received good water-control oil-increasing and improves the effect of recovery ratio.The foam composite flooding of Daqing oil field is made up of alkali, surfactant, polymer, and natural gas, as injecting gas, also receives good recovery ratio.Shengli Oil Field in 2003 in isolated island 28-8 well injection reinforcing foam carry out oil displacement test, achieve preferable effect.
China Patent No. is 201310212134.5 to disclose " a kind of acid CO2The efficient foaming agent of foam fracturing system ", its formula is: zwitterionic surfactant A 38-42%, zwitterionic surfactant B 40-45%, amphoteric gemini surfactant 5-8%, high molecular polymer 0.3-0.5%, surplus are solvent.It is applicable to Ordos Basin gas well acidity CO2Foam fracturing system.The shortcoming of this system or deficiency are that foamability is general, temperature resistant capability is limited (only 20-80 DEG C).
China Patent No. is 201010283154.8 to disclose " a kind of foaming agent used in composite-foam oil flooding ", and its formula is: hydroxyl sulfo betaine 0.2-0.4%, 1227 be 0.1%, lauryl alcohol be 0.04-0.1%, surplus is formation water.The shortcoming of this foaming agent or deficiency are temperature resistance poor (only 50 DEG C).
China Patent No. is 201010521953.4 to disclose " a kind of temperature-resistant anti-salt low-tension foam flooding oil preparation and preparation method thereof ", and its preparation method is: continued stirring until, at 40-60 DEG C, the system of being completely dissolved by alkanolamide, bipolarity based surfactants and water.The shortcoming or not enough for foam stability poor (at 50 DEG C, half foam life period is only 40 minutes) of this system.
From the point of view of at present it has been reported that obtain the follow-up popularization in the oil field of preferable spot effect, the most unsatisfactory, the dynamics of popularization is less, reason mainly have following some: 1, not yet set up the system standard of foam flooding at present；2, currently mainly reporting the data that foam flooding is favourable, for weakness and the problem of foam flooding, research is few, have impact on effect and the popularization of foam flooding；3, foam stability is poor, temperature-resistant anti-salt scarce capacity, meet oil froth breaking, oil displacement efficiency less than polymer；4, surfactant is adsorbed at rock surface in a large number, reduces oil displacement efficiency etc..
Summary of the invention
It is an object of the invention to for the major part weak points such as foaming agent foam is indifferent, foam stability is poor at present, using betaines, polyether sulfonate class and fluorine carbon surfactant to prepare as the composition of foaming agent, a kind of foaming capacity is strong, foam stability good, there is good temperature-resistant anti-salt performance simultaneously, it is adaptable to the foaming system that the oil field displacement of reservoir oil uses.
The present invention is by percentage to the quality: alkyl acyl propylsultaine glycine betaine mass percent is: 2%～40%；Aliphatic alcohol polyoxyethylene sulfonate mass percent is: 1%～20%；Alkyl betaine mass percent is: 1%～10%；Fluorine carbon surfactant qualities percentage ratio is: 1%～5%；Water surplus.
Alkyl acyl propylsultaine glycine betaine molecular formula is: CnH2n+1CONH(CH2)3N+(CH3)2CH2CH(OH)CH2SO3 -, wherein: n=12～20；
Polyoxyethylenated alcohol sodium sulfate molecular formula is: CnH2n+1O(CH2CH2O)mSO3Na, wherein: n=10～18, m=3～20；
Alkyl betaine molecular formula is: CnH2n+1N+(CH3)2CH2COO-, wherein: n=12～18；
Fluorine carbon surfactant molecule formula is: CnF2n+1COONa, wherein n=6～8.
Preferably, each compositional formula is as follows for the present invention:
Alkyl acyl propylsultaine glycine betaine molecular formula is: CnH2n+1CONH(CH2)3N+(CH3)2CH2CH(OH)CH2SO3 -, wherein: n is 14～18；
Polyoxyethylenated alcohol sodium sulfate molecular formula is:
CnH2n+1O(CH2CH2O)mSO3Na, wherein: n is 12～16, m is 4～6；
Alkyl betaine molecular formula is:
CnH2n+1N+(CH3)2CH2COO-, wherein: n is 14～18.
The preparation method that the present invention provides is: by abovementioned alkyl acyl propylsultaine glycine betaine, polyoxyethylenated alcohol sodium sulfate, alkyl betaine, fluorine carbon surfactant, being added to the water, at 50 DEG C, stirring at low speed is to being completely dissolved, and to obtain final product.
The present invention uses Roche foam meter, evaluates foaming characteristic and the foam stability of foaming agent, and 80～100 DEG C, salinity 80000ppm, its foaming volume is up to more than 650mL, and half foam life period is at more than 28min.Lab simulation improves recovery ratio and reaches more than 16%.
Frothing capacity of the present invention is excellent, and can form stable foam, has the abilities such as stronger heatproof, anti-salt, meets the needs of oil field development.
Detailed description of the invention
Embodiment 1:
The most accurately weigh alkyl acyl propylsultaine glycine betaine (n=16) 4.0g, polyoxyethylenated alcohol sodium sulfate (n=12, m=4) 1.0g, alkyl betaine (n=14) 1.0g, fluorine carbon surfactant 0.5g, it is added sequentially in 43.5g water, is slowly stirred to each component and is completely dissolved.Taking this sample of 0.5g, be configured to, with the simulation water that salinity is 80000ppm, the solution that mass concentration is 0.5%, utilize Roche foam meter to record foam volume at 100 DEG C for 652mL, half foam life period is 37min.Lab simulation improves recovery ratio and reaches 18%.
Embodiment 2:
The most accurately weigh alkyl acyl propylsultaine glycine betaine (n=18) 5.0g, polyoxyethylenated alcohol sodium sulfate (n=14, m=6) 0.8g, alkyl betaine (n=16) 1.0g, fluorine carbon surfactant 0.6g, it is added sequentially in 42.6g water, is slowly stirred to each component and is completely dissolved.Taking this sample of 0.5g, be configured to, with the simulation water that salinity is 80000ppm, the solution that mass concentration is 0.5%, utilize Roche foam meter to record foam volume at 80 DEG C for 665mL, half foam life period is 32min.Lab simulation improves recovery ratio and reaches 21%.
Embodiment 3:
The most accurately weigh alkyl acyl propylsultaine glycine betaine (n=14) 3.0g, polyoxyethylenated alcohol sodium sulfate (n=14, m=4) 1.0g, alkyl betaine (n=16) 0.6g, fluorine carbon surfactant 0.5g, it is added sequentially in 44.9g water, is slowly stirred to each component and is completely dissolved.Taking this sample of 0.5g, be configured to, with the simulation water that salinity is 80000ppm, the solution that mass concentration is 0.5%, utilize Roche foam meter to record foam volume at 80 DEG C for 655mL, half foam life period is 41min.Lab simulation improves recovery ratio and reaches 24%.
Embodiment 4:
The most accurately weigh alkyl acyl propylsultaine glycine betaine (n=18) 4.0g, polyoxyethylenated alcohol sodium sulfate (n=16, m=4) 1.5g, alkyl betaine (n=18) 0.8g, fluorine carbon surfactant 0.8g, it is added sequentially in 42.9g water, is slowly stirred to each component and is completely dissolved.Taking this sample of 0.5g, be configured to, with the simulation water that salinity is 80000ppm, the solution that mass concentration is 0.5%, utilize Roche foam meter to record foam volume at 90 DEG C for 687mL, half foam life period is 35min.Lab simulation improves recovery ratio and reaches 16%.
Embodiment 5:
The most accurately weigh alkyl acyl propylsultaine glycine betaine (n=14) 8.0g, polyoxyethylenated alcohol sodium sulfate (n=14, m=4) 2.5g, alkyl betaine (n=14) 0.6g, fluorine carbon surfactant 0.4g, it is added sequentially in 38.5g water, is slowly stirred to each component and is completely dissolved.Taking this sample of 0.5g, be configured to, with the simulation water that salinity is 80000ppm, the solution that mass concentration is 0.5%, utilize Roche foam meter to record foam volume at 80 DEG C for 662mL, half foam life period is 28min.Lab simulation improves recovery ratio and reaches 17%.
Embodiment 6:
The most accurately weigh alkyl acyl propylsultaine glycine betaine (n=16) 10.0g, polyoxyethylenated alcohol sodium sulfate (n=16, m=4) 1.2g, alkyl betaine (n=18) 1.0g, fluorine carbon surfactant 0.6g, it is added sequentially in 37.2g water, is slowly stirred to each component and is completely dissolved.Taking this sample of 0.5g, be configured to, with the simulation water that salinity is 50000ppm, the solution that mass concentration is 0.5%, utilize Roche foam meter to record foam volume at 100 DEG C for 675mL, half foam life period is 30min.Lab simulation improves recovery ratio and reaches 19%.
Embodiment 7:
The most accurately weigh alkyl acyl propylsultaine glycine betaine (n=14) 8.0g, polyoxyethylenated alcohol sodium sulfate (n=12, m=4) 2.5g, alkyl betaine (n=14) 1.0g, fluorine carbon surfactant 0.5g, it is added sequentially in 38g water, is slowly stirred to each component and is completely dissolved.Taking this sample of 0.5g, be configured to, with the simulation water that salinity is 50000ppm, the solution that mass concentration is 0.5%, utilize Roche foam meter to record foam volume at 100 DEG C for 670mL, half foam life period is 35min.Lab simulation improves recovery ratio and reaches 16%.
Claims (5)
1. a foam flooding foaming agent, it is characterised in that each constituent mass percentage ratio is as follows:
Alkyl acyl propylsultaine glycine betaine 2%～40%
Polyoxyethylenated alcohol sodium sulfate 1%～20%
Alkyl betaine 1%～10%
Fluorine carbon surfactant 1%～5%
Water surplus.
2. foaming agent as claimed in claim 1, it is characterised in that each compositional formula is as follows:
Alkyl acyl propylsultaine glycine betaine molecular formula is: CnH2n+1CONH(CH2)3N+(CH3)2CH2CH(OH)CH2SO3 -, wherein: n=12～20；
Polyoxyethylenated alcohol sodium sulfate molecular formula is:
CnH2n+1O(CH2CH2O)mSO3Na, wherein: n=10～18, m=3～20；
Alkyl betaine molecular formula is:
CnH2n+1N+(CH3)2CH2COO-, wherein: n=12～18；
Fluorine carbon surfactant molecule formula is:
CnF2n+1COONa, wherein n=6～8.
3. foaming agent as claimed in claim 2, its spy is that each compositional formula is as follows:
Alkyl acyl propylsultaine glycine betaine molecular formula is: CnH2n+1CONH(CH2)3N+(CH3)2CH2CH(OH)CH2SO3 -, wherein: n is 14～18；
Polyoxyethylenated alcohol sodium sulfate molecular formula is:
CnH2n+1O(CH2CH2O)mSO3Na, wherein: n is 12～16, m is 4～6；
Alkyl betaine molecular formula is:
CnH2n+1N+(CH3)2CH2COO-, wherein: n is 14～18.
4. the preparation method of foaming agent as claimed in claim 1, it is characterized in that preparation method is: by abovementioned alkyl acyl propylsultaine glycine betaine, polyoxyethylenated alcohol sodium sulfate, alkyl betaine, fluorine carbon surfactant, being added to the water, at 50 DEG C, stirring at low speed is to being completely dissolved, and to obtain final product.
5. the foaming agent described in claim 1, it is characterised in that described foaming agent for 80～100 DEG C, salinity be the tertiary oil recovery under the conditions of 0-80000ppm.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107880865A (en) * | 2017-11-01 | 2018-04-06 | 中国石油天然气股份有限公司 | A kind of low interfacial tension foam flooding finish and preparation method thereof |
| CN112812761A (en) * | 2021-01-15 | 2021-05-18 | 四川省威沃敦化工有限公司 | Foaming agent with high temperature resistance, high salt content and high condensate oil content as well as preparation method and application thereof |
| CN116064015A (en) * | 2023-04-06 | 2023-05-05 | 中国石油大学(华东) | Salt-sensitive self-crosslinking gel foam system and preparation method and application thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107880865A (en) * | 2017-11-01 | 2018-04-06 | 中国石油天然气股份有限公司 | A kind of low interfacial tension foam flooding finish and preparation method thereof |
| CN107880865B (en) * | 2017-11-01 | 2020-03-10 | 中国石油天然气股份有限公司 | Low-interfacial-tension foam oil displacement agent and preparation method thereof |
| CN112812761A (en) * | 2021-01-15 | 2021-05-18 | 四川省威沃敦化工有限公司 | Foaming agent with high temperature resistance, high salt content and high condensate oil content as well as preparation method and application thereof |
| CN116064015A (en) * | 2023-04-06 | 2023-05-05 | 中国石油大学(华东) | Salt-sensitive self-crosslinking gel foam system and preparation method and application thereof |
| CN116064015B (en) * | 2023-04-06 | 2023-06-09 | 中国石油大学(华东) | Salt-sensitive self-crosslinking gel foam system and preparation method and application thereof |
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Address after: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee after: China Petroleum & Chemical Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: China Petroleum & Chemical Corp. Patentee before: Nanhua Group Research Institute |
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Address after: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee after: China Petroleum & Chemical Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: China Petroleum & Chemical Corp. Patentee before: Nanhua Group Research Institute |