CN103275693B - A kind of acid CO 2the efficient pore forming material of foam fracturing system - Google Patents
A kind of acid CO 2the efficient pore forming material of foam fracturing system Download PDFInfo
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- CN103275693B CN103275693B CN201310212134.5A CN201310212134A CN103275693B CN 103275693 B CN103275693 B CN 103275693B CN 201310212134 A CN201310212134 A CN 201310212134A CN 103275693 B CN103275693 B CN 103275693B
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- forming material
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Abstract
The invention discloses one and be applicable to Ordos Basin gas well CO
2the acid CO of foam fracturing system
2the efficient pore forming material of foam fracturing system, is characterized in that: this pore forming material is formed by the preparation of raw material of following mass percent: the amphoteric gemini surfactant of zwitterionics B, 5-8% of zwitterionics A, 40-45% of 38-42%, 0.3-0.5% high molecular polymer, surplus are solvent.Lathering property of the present invention is excellent, and foam stabilizing effect is good, has very strong anti-salt, oil resistant, heatproof, acid-fast ability, can meet gas well CO
2the needs that foam fracturing is bubbled.
Description
Technical field
The present invention relates to the acid CO of a kind of gas well
2foam fracturing formula of foaming agent, particularly a kind of acid CO
2the efficient pore forming material of foam fracturing system.
Background technology
CO
2foamed fracturing fluid is a kind of high-quality low damage fracture liquid system, have viscosity high, take that sand hangs that sand ability is strong, leak-off is low, frictional resistance is little, clean fracturing crack, easily return row, fluid efficiency high little to reservoir damage, be specially adapted to the fracturing reform of low pressure, hypotonic, sensitive reservoir.Froth quality affects CO
2one of principal element of foamed fracturing fluid performance, froth quality is to CO
2the viscosity influence of foam system is comparatively large, and viscosity increases fast with the increase of froth quality, and the height of froth quality affects CO
2the rheological of foamed fracturing fluid.And the quality of pore forming material performance directly affects the height of froth quality.
Along with Ordos Basin extends the large-scale development in gas field, gas well fracturing well is being on the increase, pressure break scale in continuous increase, as a kind of fracturing fluid system of high-quality Low Damage, CO
2the adopted well of foamed fracturing fluid is also strengthening with scale.In foam fracturing liquid system, the effect of pore forming material is after gas, liquid mixing, makes gas be that air bubble-shaped is dispersed and forms foam in a liquid, and have good foam stabilizing effect.Therefore pore forming material quality not only affects formation and the character of foam, and plays vital effect to the success or not of pressure break.
At present, the fracturing reform in gas field generally adopts aqueous fracturing fluid, but most of aqueous fracturing fluid can not meet the pressure break needs of low-pressure water sensitivity hydrocarbon-bearing pool.Therefore, increasing gas well adopts CO
2the hydrocarbon-bearing pool of low-pressure water sensitivity transformed by foamed fracturing fluid.CO
2the quality of foamed fracturing fluid froth quality depends on the lathering property of pore forming material and steady bubble ability.The pore forming material that conventional pressure break adopts mostly is aniorfic surfactant system or cationic surfactant system, the pore forming material of aniorfic surfactant system and the fracturing liquid of high salinity and local water are incompatible, and the pore forming material of cationic surfactant system and sandstone formation rock absorb seriously, affect latherability and the foam stabilizing effect of foamed fracturing fluid.And the pore forming material that conventional pressure break adopts is acidproof, temperature resistant capability is poor, is not suitable for carrying out acid CO at the gas well reservoir of middle high temperature
2foam fracturing.
Chinese patent 89108127.5 discloses a kind of whipping agent of preparing foam fracturing liquid, this pore forming material is mainly main raw material with anion surfactant, be incompatible with acidic fracturing fluid and local water, make acidic fracturing fluid viscosity greatly reduce after adding, affect the cross-linking effect of acidic fracturing fluid and take grittiness energy.
Chinese patent 03104739.4 discloses the novel pore forming material of a kind of pressure break, this pore forming material is made up of zwitterionics, anion surfactant and low mass molecule alcohol, equally owing to containing anion surfactant in this pore forming material, be incompatible with acid cross-linked fracturing fluid system, acidic fracturing fluid viscosity is reduced greatly, affects the cross-linking effect of acidic fracturing fluid and take grittiness energy.
Summary of the invention
The object of this invention is to provide a kind of acid CO
2the efficient pore forming material of foam fracturing system, its latherability, foam stabilizing effect, acidproof and temperature resistant capability good, and the gas well reservoir being adapted at middle high temperature carries out acid CO
2foam fracturing.
Technical solution of the present invention is: a kind of acid CO
2the efficient pore forming material of foam fracturing system, is characterized in that: this pore forming material is formed by the preparation of raw material of following mass percent: the amphoteric gemini surfactant of zwitterionics B, 5-8% of zwitterionics A, 40-45% of 38-42%, 0.3-0.5% high molecular polymer, surplus are solvent.
Described zwitterionics A is the zwitterionics of a kind of carbon chain lengths at 18-20.
Described a kind of carbon chain lengths is Cetyl dimethyl betaine or octodecyl betaine at the zwitterionics of 18-20.
Described zwitterionics B is the zwitterionics of a kind of carbon chain lengths at 16-20.
Described a kind of carbon chain lengths is hexadecyl sultaine or hexadecyl hydroxypropyl sultaine at the zwitterionics of 16-20.
Described amphoteric gemini surfactant is a kind of Shuangzi zwitterionics with 2 hydrophobic groups, 4 hydrophilic groups, and its trade name is lauryl alcohol ether glucosides.
The high molecular polymer of described high molecular polymer to be a kind of molecular weight be 1800-2500 ten thousand.
Described high molecular polymer is polyacrylamide.
Described solvent is a kind of small molecular alcohol.
Described a kind of small molecular alcohol is ethanol or Virahol.
Source chemicals involved in the present invention all can directly be buied from the market.
Advantage of the present invention:
1, pore forming material normal temperature foam height is high, long half time, adopts WaringBlender method, and at 25 DEG C, rotating speed 8000r/min, this pore forming material of dosage 0.5%, the foam height recording this pore forming material can reach 510mL, and the transformation period is the longest reaches 12min.
2, this pore forming material system is mainly based on amphoteric ionic surfactant, and salt resistant character is good, with the fracturing liquid of high salinity and local water compatibleness good;
3, this pore forming material acid-fast ability is strong, and under normal temperature, foam height and transformation period are almost constant within the scope of pH value 2-6.
4, this pore forming material temperature resistant capability is strong, and foam height and transformation period change not quite within the scope of 20-80 DEG C.
5, good with acidic fracturing fluid system compatibleness.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, but not as a limitation of the invention.
The acid CO of one of the present invention
2the efficient pore forming material of foam fracturing system is formed by the preparation of raw material of following mass percent: the amphoteric gemini surfactant of zwitterionics B, 5-8% of zwitterionics A, 40-45% of 38-42%, 0.3-0.5% high molecular polymer, surplus are solvent; Described zwitterionics A is the zwitterionics of a kind of carbon chain lengths at 18-20, specifically Cetyl dimethyl betaine or octodecyl betaine; Described zwitterionics B is the zwitterionics of a kind of carbon chain lengths at 16-20, specifically hexadecyl sultaine or hexadecyl hydroxypropyl sultaine; Described amphoteric gemini surfactant is a kind of Shuangzi zwitterionics with 2 hydrophobic groups, 4 hydrophilic groups.The high molecular polymer of described high molecular polymer to be a kind of molecular weight be 1800-2500 ten thousand, is specially polyacrylamide; Described solvent is a kind of small molecular alcohol, specifically ethanol or Virahol.
embodiment 1
A kind of acid CO
2the efficient pore forming material of foam fracturing system is formed by the component proportion of following mass percent: the octodecyl betaine of 40%, the hexadecyl sultaine of 45%, 5% lauryl alcohol ether glucosides, the polyacrylamide of 0.5% and the ethanol of 9.5%.Raw material in above-mentioned formula is put into conventional mechanical stirrer stirring 2min fully to mix (rotating speed 1000r/min).Lauryl alcohol ether glucosides adopts henna academic libraries purifying work Technology Co., Ltd. to produce.
embodiment 2
A kind of acid CO
2the efficient pore forming material of foam fracturing system is formed by the component proportion of following mass percent: the octodecyl betaine of 42%, the hexadecyl hydroxypropyl sultaine of 42%, 6% lauryl alcohol ether glucosides, the polyacrylamide of 0.3% and the ethanol of 9.7%.Raw material in above-mentioned formula is put into conventional mechanical stirrer stirring 2min fully to mix (rotating speed 1000r/min).Above-mentioned raw materials reagent directly buys from market.
embodiment 3
A kind of acid CO
2the efficient pore forming material of foam fracturing system is formed by the component proportion of following mass percent: the Cetyl dimethyl betaine of 40%, the hexadecyl sultaine of 44%, 6% lauryl alcohol ether glucosides, the polyacrylamide of 0.4% and the ethanol of 9.6%.Raw material in above-mentioned formula is put into conventional mechanical stirrer stirring 2min fully to mix (rotating speed 1000r/min).
embodiment 4
A kind of acid CO
2the efficient pore forming material of foam fracturing system is formed by the component proportion of following mass percent: the octodecyl betaine of 42%, the hexadecyl sultaine of 41%, 8% lauryl alcohol ether glucosides, the polyacrylamide of 0.4% and the ethanol of 8.6%.Raw material in above-mentioned formula is put into conventional mechanical stirrer stirring 2min fully to mix (rotating speed 1000r/min).
embodiment 5
A kind of acid CO
2the efficient pore forming material of foam fracturing system is formed by the component proportion of following mass percent: the octodecyl betaine of 38%, the hexadecyl sultaine of 40%, 8% lauryl alcohol ether glucosides, the polyacrylamide of 0.4% and the Virahol of 13.6%.Raw material in above-mentioned formula is put into conventional mechanical stirrer stirring 2min fully to mix (rotating speed 1000r/min).
embodiment 6
The invention discloses a kind of acid CO
2the efficient pore forming material of foam fracturing system, the component proportion comprising following mass percent forms: octodecyl betaine: 42%; Hexadecyl hydroxypropyl sultaine: 43%; Lauryl alcohol ether glucosides: 7%; Polyacrylamide: 0.5%; Ethanol: 7.5%.Adopt conventional mechanical stirrer to stir 2min fully to mix (rotating speed 1000r/min).By the acid CO of this formula
2the efficient pore forming material of foam fracturing system joins acid CO
2foam fracturing liquid system, and apply on prolongation 2 layers, well mountain, gas field.2 sections, this well mountain 2752.2-2757.1, rate of permeation 0.8 × 10
-3μm
2, porosity 6.6%, gas saturation 52%, perforation interval 2752.6-2755.6m, without display after perforation.This well adopts guanidine gum fracturing fluid pressure break for the first time, open-flow capacity 0.3249 × 10
4m
3/ d, adopts acid carbon dioxide foaming fracturing liquid refracturing, pumps into fracturing liquid 80m
3, liquid CO
2141m
3, average froth quality 63.80%, adds CarboLite haydite 16m
3, after pressure, the row of returning leads 98%, open-flow capacity 1.5213 × 10 after pressure
4m
3/ d, adopts and with the addition of acid CO
2the acid carbon dioxide foaming fracturing fluid system of the efficient pore forming material of foam fracturing system increases production 4.68 times, and effect of increasing production is obvious.
The pore forming material of the present embodiment 1-6 adopts WaringBlender method respectively, at 25 DEG C, rotating speed 8000r/min, respectively the embodiment 1-6 pore forming material of dosage 0.5%, the foam height recording embodiment of the present invention 1-6 pore forming material can reach 510mL, and the transformation period is the longest reaches 12min.Illustrate that pore forming material normal temperature foam height of the present invention is high, long half time; Bubbled at normal temperatures respectively by the pore forming material of embodiment 1-6, foam height and transformation period are almost constant within the scope of pH value 2-6, illustrate that pore forming material acid-fast ability of the present invention is strong.Carry out heatproof mensuration respectively to the pore forming material of embodiment 1-6, foam height and transformation period change not quite within the scope of 20-80 DEG C, illustrate that pore forming material temperature resistant capability of the present invention is strong.
Claims (1)
1. an acid CO
2the efficient pore forming material of foam fracturing system, is characterized in that: this pore forming material is formed by the preparation of raw material of following mass percent: the lauryl alcohol ether glucosides of zwitterionics B, 5-8% of zwitterionics A, 40-45% of 38-42%, 0.3-0.5% high molecular polymer, surplus are solvent; Described zwitterionics A is Cetyl dimethyl betaine or octodecyl betaine; Described zwitterionics B is hexadecyl sultaine or hexadecyl hydroxypropyl sultaine; Described high molecular polymer is polyacrylamide; Described solvent is ethanol or Virahol.
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| CN201310212134.5A CN103275693B (en) | 2013-05-31 | 2013-05-31 | A kind of acid CO 2the efficient pore forming material of foam fracturing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106566489B (en) * | 2016-10-19 | 2020-09-22 | 中国石油化工股份有限公司 | High-acidity gas reservoir water-based microbubble well killing fluid |
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| CN103721625B (en) * | 2014-01-04 | 2016-04-06 | 山东大学 | A kind of water base foam stabilizing agent, preparation method and there is the water based foam system of ultrastability |
| CN103965859A (en) * | 2014-04-23 | 2014-08-06 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Oilwell gemini surfactant fracturing fluid and preparation method thereof |
| CN104694091B (en) * | 2015-01-15 | 2017-12-19 | 陕西延长石油油田化学科技有限责任公司 | A kind of oil field foaming agent and preparation method thereof |
| CN108383414B (en) * | 2018-03-14 | 2020-01-31 | 殷成胜 | novel foaming agent and application thereof in preparation of foam concrete |
| CN108822823A (en) * | 2018-06-15 | 2018-11-16 | 吉林石油集团兴业石油化学技术服务有限公司 | A kind of acid-resisting and oil-resisting oil recovery gas production foaming agent and preparation method thereof |
| US11236264B2 (en) | 2020-06-08 | 2022-02-01 | Saudi Arabian Oil Company | Methods and compositions using a combination of zwitterionic surfactants and gemini surfactants as diversion agents |
| CN112195022B (en) * | 2020-10-26 | 2022-12-02 | 陕西延长石油（集团）有限责任公司 | Foaming agent for carbon dioxide foam fracturing system and preparation method and application thereof |
| US12071838B2 (en) | 2022-10-07 | 2024-08-27 | Saudi Arabian Oil Company | Viscoelastic surfactants for acid diversion in downhole operations |
| US11959017B1 (en) | 2022-10-07 | 2024-04-16 | Saudi Arabian Oil Company | Methods and materials for wellbore fluid diversion using visco-elastic surfactants |
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|---|---|---|---|---|
| CN102965092A (en) * | 2012-11-06 | 2013-03-13 | 中国石油天然气股份有限公司 | Salt-resistant low-temperature foam lifting drainage chemical agent and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102965092A (en) * | 2012-11-06 | 2013-03-13 | 中国石油天然气股份有限公司 | Salt-resistant low-temperature foam lifting drainage chemical agent and preparation method and application thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106566489B (en) * | 2016-10-19 | 2020-09-22 | 中国石油化工股份有限公司 | High-acidity gas reservoir water-based microbubble well killing fluid |
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