CN103215020A - Preparation method of wetting improving agent for gas well fracturing - Google Patents
Preparation method of wetting improving agent for gas well fracturing Download PDFInfo
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- CN103215020A CN103215020A CN2012100164286A CN201210016428A CN103215020A CN 103215020 A CN103215020 A CN 103215020A CN 2012100164286 A CN2012100164286 A CN 2012100164286A CN 201210016428 A CN201210016428 A CN 201210016428A CN 103215020 A CN103215020 A CN 103215020A
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- gas well
- well fracturing
- wetting
- improving agent
- water
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- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
The invention relates to a preparation method of a wetting improving agent for gas well fracturing. The method comprises the following steps: adding a host perfluorobutyl-alkylmethacrylic acid-n-octylsulphonyl fluoride and water to a reactor; uniformly mixing, maintaining the temperature in a range of 90-120DEG C, adding triethanolamine and dodecyltrimethylammonium chloride, and reacting for 1-4h while stirring to obtain a colorless transparent liquid which is the wetting improving agent for gas well fracturing. The wetting improving agent comprises 1-2% by volume concentration of the host, 2-4% by volume concentration of triethanolamine, 1-2% by volume concentration of dodecyltrimethylammonium chloride, and the balance water. The wetting improving agent for gas well fracturing is simple to prepare, and can obviously reduce the damage of the intrusion of water to a low-permeability ventilating layer. The wetting improving agent for gas well fracturing has the advantages of surface tension reduction, contact angle increase, obvious reduction of the liquid flow capillary resistance, and good wetting improvement effect.
Description
Technical field
The present invention relates to a kind of preparation method who is fit to employed wetting activator in the hypotonic gasser fracturing yield increasing technology.
Background technology
Wetting phenomena is the three a kind of manifestation that contact free surface energy on the circumference, is meant a kind of surface phenomena that just can take place when two kinds of fluids and solid surface three-phase exist simultaneously.Therefore, it is all relevant with this triphasic characteristic variations to influence the factor of wettability.
Change the wettability of rock surface, can reduce irreducible water saturation to a certain extent, improve the gas effective permeability greatly.When rock surface was transformed into neutrality, capillary pressure was approaching zero, the capillary resistance when having reduced air water or oil-water two-phase flow; When rock surface is transformed into slightly oil-wet, rock surface tool hydrophobic nature, therefore weakened the physics chemical action between water and the rock surface, reduced the hydration shell thickness of pore constriction, be equivalent to increase the effective mobile radius of pore throat of rock, water is easier to flow, and the phase commute is discharged, the gas-bearing formation rock core has reduced irreducible water saturation, has improved the effective permeability of gas.
The interaction between crude oil moiety, mineral surface, the local water chemical property (comprising ion composition and pH value) is depended in the change of wettability.In silicon-dioxide/oil/water system, the tracer level of multivalent metal cation can change wettability.Positively charged ion can reduce the solubleness of tensio-active agent in the crude oil, promotes the absorption of anion surfactant on silicon-dioxide.
The method of three-type-person's industry control system wettability commonly used in the laboratory: handle rock core with chemical agent (1), general sandstone rock core organochlorosilane solution, carbonatite naphthenic acid; (2) with pure fluid and agglomerating tetrafluoroethylene rock core; (3) in fluid, add tensio-active agent.
Used wetting improvement technology mainly is to add tensio-active agent in fluid at present.By increasing contact angle, the capillary resistance when reducing anti-row.
Summary of the invention
The purpose of this invention is to provide the preparation method of a kind of gas well fracturing, return from raising and enter hand,, have the effect of the capillary resistance when reducing the row of returning by increasing contact angle research and development novel surfactant with wetting activator.
Gas well fracturing of the present invention is prepared by following steps with the preparation method of wetting activator:
In reactor, add yellow acyl fluorides of host perfluoro butyl-alkane methacrylic acid-n-octyl and water; Mix, maintain the temperature at 90-120 ℃, add trolamine, Dodecyl trimethyl ammonium chloride stirs reaction down 1-4 hour, obtains colourless transparent liquid and is the wetting activator of gas well fracturing.
Described host volumetric concentration is 1-2%;
Described trolamine volumetric concentration is 2-4%;
Described Dodecyl trimethyl ammonium chloride volumetric concentration is 1-2%;
Surplus is a water.
The invention characteristics:
1. preparation technology is simple, and the raw material type that the present invention uses is few, and preparation process is simple to operate;
2. wetting improvement is effective, and the injury that reduces hyposmosis gas-bearing formation invasion water is had positive effect;
3. gas well fracturing is good with wetting activator and guanidine matrix liquid compatibility;
4. use the wetting activator of gas well fracturing, reduced surface tension, increase contact angle, the liquid-flow capillary resistance obviously reduces.
Embodiment
Embodiment 1:
In being housed, the yellow acyl fluorides aqueous solution of host 1% perfluoro butyl-alkane methacrylic acid-n-octyl adds 3% triethanolamine solution, 1.5% Dodecyl trimethyl ammonium chloride, mix, under 100 ℃, sustained reaction 3 hours, the colourless transparent liquid that obtains are the wetting activator of gas well fracturing.
Embodiment 2:
In being housed, the yellow acyl fluorides aqueous solution of host 1.5% perfluoro butyl-alkane methacrylic acid-n-octyl adds 2% triethanolamine solution, 2% Dodecyl trimethyl ammonium chloride, mix, under 100 ℃, sustained reaction 4 hours, the colourless transparent liquid that obtains are the wetting activator of gas well fracturing.
Embodiment 3:
In being housed, the yellow acyl fluorides aqueous solution of host 1% perfluoro butyl-alkane methacrylic acid-n-octyl adds 4% triethanolamine solution, 1% Dodecyl trimethyl ammonium chloride, mix, under 100 ℃, sustained reaction 2 hours, the colourless transparent liquid that obtains are the wetting activator of gas well fracturing.
Claims (1)
1. a gas well fracturing is characterized in that with the preparation method of wetting activator:
1) in reactor, adds yellow acyl fluorides of host perfluoro butyl-alkane methacrylic acid-n-octyl and water;
2) mix, maintain the temperature at 90-120 ℃, add trolamine, Dodecyl trimethyl ammonium chloride, stir reaction down 1-4 hour, obtain colourless transparent liquid and be the wetting activator of gas well fracturing;
Described host volumetric concentration is 1-2%;
Described trolamine volumetric concentration is 2-4%;
Described Dodecyl trimethyl ammonium chloride volumetric concentration is 1-2%; Surplus is a water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100164286A CN103215020A (en) | 2012-01-18 | 2012-01-18 | Preparation method of wetting improving agent for gas well fracturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100164286A CN103215020A (en) | 2012-01-18 | 2012-01-18 | Preparation method of wetting improving agent for gas well fracturing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103215020A true CN103215020A (en) | 2013-07-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012100164286A Pending CN103215020A (en) | 2012-01-18 | 2012-01-18 | Preparation method of wetting improving agent for gas well fracturing |
Country Status (1)
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| CN (1) | CN103215020A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107418546A (en) * | 2017-07-28 | 2017-12-01 | 中国石油天然气股份有限公司 | One kind changes tight sand surface wettability surfactant and its preparation method and application |
| CN110309611A (en) * | 2019-07-08 | 2019-10-08 | 中国石油大学(北京) | Air water two phase fluid flow law forecasting method and system based on air water thickness distribution |
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| CN1067945A (en) * | 1991-06-15 | 1993-01-13 | 四川石油管理局天然气研究所 | Acidifying and fracturing technology cleanup additive |
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| WO2011086360A1 (en) * | 2010-01-15 | 2011-07-21 | Halliburton Energy Services, Inc. | Treatment fluids for wetting control of multiple rock types and associated methods |
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2012
- 2012-01-18 CN CN2012100164286A patent/CN103215020A/en active Pending
Patent Citations (7)
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| CN1067945A (en) * | 1991-06-15 | 1993-01-13 | 四川石油管理局天然气研究所 | Acidifying and fracturing technology cleanup additive |
| GB2383809A (en) * | 2001-11-13 | 2003-07-09 | Baker Hughes Inc | Fracturing fluids for delayed flow back operations |
| US7256160B2 (en) * | 2001-11-13 | 2007-08-14 | Baker Hughes Incorporated | Fracturing fluids for delayed flow back operations |
| CN1760319A (en) * | 2005-10-18 | 2006-04-19 | 中国石油大学(华东) | Cleanup additive in use for acidification in high temperature |
| CN101827913A (en) * | 2007-03-23 | 2010-09-08 | 德克萨斯州立大学董事会 | Handle the method on the stratum of pressure break |
| CN101705081A (en) * | 2009-11-17 | 2010-05-12 | 中国石油天然气股份有限公司 | Gemini quaternary-ammonium-salt water injection increasing agent |
| WO2011086360A1 (en) * | 2010-01-15 | 2011-07-21 | Halliburton Energy Services, Inc. | Treatment fluids for wetting control of multiple rock types and associated methods |
Non-Patent Citations (3)
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| 刘雪芬等: "双疏性表面处理预防致密储层水相圈闭损害实验研究", 《天然气地球科学》, vol. 20, no. 02, 10 April 2009 (2009-04-10), pages 292 - 296 * |
| 王富华: "中等润湿性在油气钻探和开发中的应用", 《断块油气田》, vol. 12, no. 03, 25 May 2005 (2005-05-25), pages 41 - 43 * |
| 舒勇等: "复合表面活性剂酸液助排剂FOC及其应用", 《油田化学》, vol. 25, no. 04, 25 December 2008 (2008-12-25), pages 320 - 324 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107418546A (en) * | 2017-07-28 | 2017-12-01 | 中国石油天然气股份有限公司 | One kind changes tight sand surface wettability surfactant and its preparation method and application |
| US10544353B2 (en) | 2017-07-28 | 2020-01-28 | Petrochina Company Ltd. | Surfactant that changes the wettability of tight sandstone and its preparation method and application |
| CN110309611A (en) * | 2019-07-08 | 2019-10-08 | 中国石油大学(北京) | Air water two phase fluid flow law forecasting method and system based on air water thickness distribution |
| CN110309611B (en) * | 2019-07-08 | 2020-09-29 | 中国石油大学(北京) | Gas-water two-phase seepage rule prediction method and system based on gas-water thickness distribution |
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Application publication date: 20130724 |