CN103713081A - Method for testing influence of reaction temperature on performance of gel breaker - Google Patents
Method for testing influence of reaction temperature on performance of gel breaker Download PDFInfo
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- CN103713081A CN103713081A CN201210408120.6A CN201210408120A CN103713081A CN 103713081 A CN103713081 A CN 103713081A CN 201210408120 A CN201210408120 A CN 201210408120A CN 103713081 A CN103713081 A CN 103713081A
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- gel breaker
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Abstract
The invention discloses a method for testing the influence of the reaction temperature on the performance of a gel breaker. The method comprises the following steps: 1, preparing a gel breaker solution; 2, weighing liquid paraffin, stirring for dissolving, and dumping the liquid paraffin into the gel breaker solution to form a stable emulsion; 3, respectively maintaining the temperature at 40DEG C, 50DEG C, 60DEG C, 70DEG C and 90DEG C, slowly adding an acetic acid solution, adjusting the pH, and fully reacting to make a core material fully coated with a wall material; 4, continuously stirring, naturally cooling, adding ice cubes, continuously stirring, adding a curing agent formaldehyde, carrying out a stirring reaction for a period of time, adjusting the pH value to 9.0 by using a 20% NaOH solution, continuously stirring, slowly heating the above system to 50DEG C from a gelating temperature, and allowing the heated system to stand for microcapsule settlement; and 5, filtering, washing, and drying at 60DEG C to obtain a product. The method has the advantages of successful test of the influence of the reaction temperature on the performance of the gel breaker, accurate test result, simple test steps, and substantial reduction of the test cost.
Description
Technical field
The present invention relates to the method for testing of a kind of temperature of reaction to gel breaker performance impact.
Background technology
Conventional oxidation gel breaker has potassium persulfate, ammonium persulfate etc.Because the activity of oxygenant is relevant with temperature, generally, when formation temperature is during lower than 49 ℃, the speed of reaction is just very slow, need to add activator.
Oxidation gel breaker have a lot of defects as: be 1. at high temperature swift in response with fracturing liquid, fracturing liquid degraded in advance and lose the ability of carrying propping agent, even cause pressing crack construction failure; 2. it belongs to non-singularity reactant, and any reactant and running into, as tubing, stratum matrix and hydro carbons etc. react, generates and the incompatible pollutant in stratum, causes formation damage; 3. be oxidized gel breaker and probably before arriving object crack, just run out, thereby do not reach brokenly the object of glue.
Capsule oxidation gel breaker is that superoxide is contained in separately in synthetic shell.The core material of capsule oxidation gel breaker is gel breaker, can adopt that to contact with water be that solubilized becomes highly active solid strong oxidizer.The advantage of capsule oxidation gel breaker has been to reduce the impact of gel breaker on fracturing liquid rheological property; Increase gel breaker consumption, improved the flow conductivity of supporting crack.
Enzyme is to have high catalytic capability and good active bioprotein, and its form and structure of self when catalytic reaction does not change, therefore another reaction of catalysis again.Conventional enzyme breaker is the potpourri of hemicellulase, cellulase, diastase and pectase, and its specific polymkeric substance of cannot degrading, does not reach desirable broken glue effect.
In addition, although conventional enzyme breaker is a kind of good fracturing liquid rubber-breaking agent at low temperatures, it requires lower pH value.General enzyme is active maximum when pH=6, and high temperature, high pH value can make enzyme lose activity.
Be directed to this, the broken colloid of novel specific biology enzyme ties up to the further investigations such as its serviceability temperature scope, pH scope, glucoside key screening specificity hydrolytic enzyme (LSE) mainly for polysaccharide polymer sugar, they only decompose specific glycoside bond in polysaccharide polymer structure, monose and the disaccharides that can be irreducibility by polymer degradation.The broken glue enzyme of these specificitys mainly contains cellulose glucoside key enzyme-specific, starch glycoside bond enzyme-specific, guanidine glue glycoside bond enzyme-specific etc.
Summary of the invention
Object of the present invention is in order to overcome the deficiencies in the prior art and defect, the method of testing of a kind of temperature of reaction to gel breaker performance impact is provided, this method of testing can successfully test out the impact of temperature of reaction on gel breaker performance, and test result is accurate, testing procedure is simple, greatly reduces testing cost.
Object of the present invention is achieved through the following technical solutions: the method for testing of temperature of reaction to gel breaker performance impact, comprises the following steps:
(1) prepare gel breaker solution, be incubated standby;
(2) take whiteruss stirring and dissolving, pour in gel breaker solution, emulsification 7min under 80 ℃ of water-baths, stirring rate 800r/min condition, forms stable emulsion fluid;
(3) adjusting rotary speed, to 700r/min, maintains the temperature at respectively 40 ℃, 50 ℃, 60 ℃, 70 ℃ and 90 ℃, slowly drips 10% acetum, regulates pH to 4.0 left and right, and fully reaction, is fully coated core by wall material;
(4) beaker is taken off in water-bath, do not stop to stir, naturally cooling, when temperature is 32～35 ℃, add ice cube, continuing to be stirred to temperature is below 10 ℃, adds hardening agent formaldehyde, stirring reaction a period of time, with 20%NaOH solution, adjust its pH to 9.0 again, continue to stir, system is slowly increased to 50 ℃ from gelling temperature, standingly treat micro-capsule sedimentation;
(5) filter, washing, dry at 60 ℃, obtain product.
In sum, the invention has the beneficial effects as follows: can successfully test out the impact of temperature of reaction on gel breaker performance, and test result is accurate, testing procedure is simple, greatly reduces testing cost.
Embodiment
Below in conjunction with embodiment, the present invention is done to detailed description further, but embodiments of the present invention are not limited to this.
Embodiment:
The present invention relates to the method for testing of temperature of reaction to gel breaker performance impact, comprise the following steps:
(1) prepare gel breaker solution, be incubated standby;
(2) take whiteruss stirring and dissolving, pour in gel breaker solution, emulsification 7min under 80 ℃ of water-baths, stirring rate 800r/min condition, forms stable emulsion fluid;
(3) adjusting rotary speed, to 700r/min, maintains the temperature at respectively 40 ℃, 50 ℃, 60 ℃, 70 ℃ and 90 ℃, slowly drips 10% acetum, regulates pH to 4.0 left and right, and fully reaction, is fully coated core by wall material;
(4) beaker is taken off in water-bath, do not stop to stir, naturally cooling, when temperature is 32～35 ℃, add ice cube, continuing to be stirred to temperature is below 10 ℃, adds hardening agent formaldehyde, stirring reaction a period of time, with 20%NaOH solution, adjust its pH to 9.0 again, continue to stir, system is slowly increased to 50 ℃ from gelling temperature, standingly treat micro-capsule sedimentation;
(5) filter, washing, dry at 60 ℃, obtain product.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, and any simple modification, the equivalent variations in every foundation technical spirit of the present invention, above embodiment done, within all falling into protection scope of the present invention.
Claims (1)
1. the method for testing of temperature of reaction to gel breaker performance impact, is characterized in that, comprises the following steps:
(1) prepare gel breaker solution, be incubated standby;
(2) take whiteruss stirring and dissolving, pour in gel breaker solution, emulsification 7min under 80 ℃ of water-baths, stirring rate 800r/min condition, forms stable emulsion fluid;
(3) adjusting rotary speed, to 700r/min, maintains the temperature at respectively 40 ℃, 50 ℃, 60 ℃, 70 ℃ and 90 ℃, slowly drips 10% acetum, regulates pH to 4.0 left and right, and fully reaction, is fully coated core by wall material;
(4) beaker is taken off in water-bath, do not stop to stir, naturally cooling, when temperature is 32～35 ℃, add ice cube, continuing to be stirred to temperature is below 10 ℃, adds hardening agent formaldehyde, stirring reaction a period of time, with 20%NaOH solution, adjust its pH to 9.0 again, continue to stir, system is slowly increased to 50 ℃ from gelling temperature, standingly treat micro-capsule sedimentation;
(5) filter, washing, dry at 60 ℃, obtain product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210408120.6A CN103713081A (en) | 2012-10-09 | 2012-10-09 | Method for testing influence of reaction temperature on performance of gel breaker |
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| CN201210408120.6A CN103713081A (en) | 2012-10-09 | 2012-10-09 | Method for testing influence of reaction temperature on performance of gel breaker |
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| CN103713081A true CN103713081A (en) | 2014-04-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104031628A (en) * | 2014-05-23 | 2014-09-10 | 浙江大学 | Preparation method of superfine-capsule-type gel breaker for shale gas fracturing fluid |
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2012
- 2012-10-09 CN CN201210408120.6A patent/CN103713081A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104031628A (en) * | 2014-05-23 | 2014-09-10 | 浙江大学 | Preparation method of superfine-capsule-type gel breaker for shale gas fracturing fluid |
| CN104031628B (en) * | 2014-05-23 | 2016-08-17 | 浙江大学 | The shale gas fracturing fluid preparation method of ultra micro capsule-type gel breaker |
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Application publication date: 20140409 |