CN103031122A - Encapsulation gel breaker and preparation method of encapsulation gel breaker - Google Patents
Encapsulation gel breaker and preparation method of encapsulation gel breaker Download PDFInfo
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- CN103031122A CN103031122A CN 201110295360 CN201110295360A CN103031122A CN 103031122 A CN103031122 A CN 103031122A CN 201110295360 CN201110295360 CN 201110295360 CN 201110295360 A CN201110295360 A CN 201110295360A CN 103031122 A CN103031122 A CN 103031122A
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Abstract
The invention discloses an encapsulation gel breaker, which comprises a micro-capsule formed by resin, and gel breakers are contained in the micro-capsule and comprise esters and organic solvents according to a mass ratio being 1:(4-6). A hydrolytic degradation coating is coated outside the micro-capsule formed by resin and is formed by poly(2-polyalkylcyanocraylate) compositions. The invention also discloses a preparation method of the encapsulation gel breaker. The preparation method comprises the following steps that the gel breaker is prepared, the esters and the organic solvents are mixed according to a mass ratio being 1:(4-6) for preparing the gel breaker; the micro-capsule is formed by the resin, and in addition, the gel breaker is filled into the micro-capsule; the hydrolytic degradation coating is prepared, and is formed by poly(2-polyalkylcyanocraylate) compositions; and the hydrolytic degradation coating is coated outside the micro-capsule formed by the resin. Through the encapsulation gel breaker and the preparation method of the encapsulation gel breaker provided by the invention, the encapsulation gel breaker with the ideal release speed can be provided, and the use efficiency of the gel breaker can be effectively improved.
Description
Technical field
The present invention relates to chemical field, relate in particular to a kind of encapsulated breaker and preparation method thereof.
Background technology
In the middle and later periods of oil-field development, the waterfrac treatment of subterranean layer is that petroleum products physical efficiency and the infiltrative method of subterranean layer are reclaimed in a kind of effective raising, is a kind of Means To Increase Production commonly used.The principle of waterfrac treatment is: pour the viscous liquid fracturing liquid into well, exert pressure and cause pressure break, improve so that have the porosity and permeability of the rock stratum of lower porosity and permeability originally.In the process of pressure break, need to keep of the fracturing fluid flowability, so gel breaker becomes requisite instrument in the pressing crack construction.The effect of gel breaker is reduction or abolishes of the fracturing fluid viscosity, keeps of the fracturing fluid flowing in fracturing process.The release rate of gel breaker and effect directly have influence on the result of fracturing operation.
In the prior art, gel breaker commonly used comprises following several:
The oxidation gel breaker: oxidation gel breaker commonly used has Potassium Persulphate, ammonium persulphate etc.Because the activity of oxygenant is relevant with temperature, generally when the stratum temperature was lower than 49 ℃, the speed of reaction was just very slow, needed to add activator.The oxidation gel breaker have a lot of defectives as: at high temperature be swift in response with fracturing liquid, fracturing liquid is degraded in advance and lose the ability of carrying propping agent, even cause the pressing crack construction failure.The broken glue of oxidation belongs to non-singularity reactant, and any reactant such as tubing, stratum matrix and the hydro carbons etc. that can and run into react, and generate and the incompatible pollutent in stratum, cause formation damage.The oxidation gel breaker has probably just run out before arriving the purpose crack, thereby does not reach brokenly the purpose of glue.
Capsule oxidation gel breaker: capsule oxidation gel breaker is that superoxide is contained in separately in the 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 the fracturing liquid rheological property; Increase the gel breaker consumption, improved the flow conductivity of supporting crack.
Summary of the invention
The present invention is intended to propose a kind of encapsulated breaker and preparation method thereof.
According to one embodiment of the invention, a kind of encapsulated breaker is proposed, comprising:
The micro-capsule of resin formation, micro-capsule contains gel breaker, and gel breaker contains ester class and organic solvent, and the mass ratio of ester class and organic solvent is 1: 4～6.Be coated on the outer hydrolytic deterioration coating of micro-capsule of resin formation, the hydrolytic deterioration coating is formed by the composition of poly-(2-alpha-cyanoacrylate alkane ester).
In one embodiment, the ester class comprises a kind of in methyl-formiate, ethyl formate or the dimethyl malonate or their combination.Organic solvent is sherwood oil.
In one embodiment, the hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 50% weight.
According to one embodiment of the invention, a kind of preparation method of encapsulated breaker is proposed, comprise following step:
Preparation gel breaker, the quality with 1: 4～6 than mixed ester class and organic solvent with the preparation gel breaker.
Inject micro-capsule with the resin formation micro-capsule and with gel breaker.
Preparation hydrolytic deterioration coating, the hydrolytic deterioration coating is formed by the composition of poly-(2-alpha-cyanoacrylate alkane ester).
Outside the micro-capsule of resin formation, apply the hydrolytic deterioration coating.
In one embodiment, the ester class comprises a kind of in methyl-formiate, ethyl formate or the dimethyl malonate or their combination.Organic solvent is sherwood oil.
In one embodiment, the hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 50% weight.
Encapsulated breaker of the present invention and preparation method thereof can provide a kind of encapsulated breaker with desirable release rate, can effectively promote the end-use performance of gel breaker.
Description of drawings
Fig. 1 has disclosed the schema according to the preparation method of the encapsulated breaker of one embodiment of the invention.
Embodiment
With reference to shown in Figure 1, the present invention has disclosed a kind of preparation method of encapsulated breaker, and the method comprises following step:
102. preparation gel breaker, the quality with 1: 4～6 than mixed ester class and organic solvent with the preparation gel breaker.In one embodiment, the ester class that the preparation gel breaker uses comprises a kind of in methyl-formiate, ethyl formate or the dimethyl malonate or their combination, and the organic solvent that the preparation gel breaker uses is sherwood oil.
104. inject micro-capsule with the resin formation micro-capsule and with gel breaker.
106. preparation hydrolytic deterioration coating, the hydrolytic deterioration coating is formed by the composition of poly-(2-alpha-cyanoacrylate alkane ester).In one embodiment, the hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 50% weight.In another embodiment, the hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 80% weight.
108. outside the micro-capsule of resin formation, apply the hydrolytic deterioration coating.
The preparation method of the encapsulated breaker that employing Fig. 1 discloses can obtain a kind of following encapsulated breaker, comprising:
The micro-capsule of resin formation, micro-capsule contains gel breaker, and gel breaker contains ester class and organic solvent, and the mass ratio of ester class and organic solvent is 1: 4～6.In one embodiment, form the used ester class of gel breaker and comprise a kind of in methyl-formiate, ethyl formate or the dimethyl malonate or their combination, and organic solvent is sherwood oil.
Be coated on the outer hydrolytic deterioration coating of micro-capsule of resin formation, the hydrolytic deterioration coating is formed by the composition of poly-(2-alpha-cyanoacrylate alkane ester).In one embodiment, the hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 50% weight.In another embodiment, the hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 80% weight.
Encapsulated breaker of the present invention and preparation method thereof can provide a kind of encapsulated breaker with desirable release rate, can effectively promote the end-use performance of gel breaker.
Claims (6)
1. an encapsulated breaker is characterized in that, comprising:
The micro-capsule of resin formation, described micro-capsule contains gel breaker, and described gel breaker contains ester class and organic solvent, and the mass ratio of described ester class and organic solvent is 1: 4～6;
Be coated on the outer hydrolytic deterioration coating of micro-capsule of resin formation, described hydrolytic deterioration coating is formed by the composition of poly-(2-alpha-cyanoacrylate alkane ester).
2. encapsulated breaker as claimed in claim 1 is characterized in that,
Described ester class comprises a kind of in methyl-formiate, ethyl formate or the dimethyl malonate or their combination;
Described organic solvent is sherwood oil.
3. encapsulated breaker as claimed in claim 1 is characterized in that,
Described hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 50% weight.
4. the preparation method of an encapsulated breaker is characterized in that, comprising:
Preparation gel breaker, the quality with 1: 4～6 than mixed ester class and organic solvent with the preparation gel breaker;
Inject micro-capsule with the resin formation micro-capsule and with gel breaker;
Preparation hydrolytic deterioration coating, described hydrolytic deterioration coating is formed by the composition of poly-(2-alpha-cyanoacrylate alkane ester);
Outside the micro-capsule of resin formation, apply the hydrolytic deterioration coating.
5. the preparation method of encapsulated breaker as claimed in claim 4 is characterized in that,
Described ester class comprises a kind of in methyl-formiate, ethyl formate or the dimethyl malonate or their combination;
Described organic solvent is sherwood oil.
6. the preparation method of encapsulated breaker as claimed in claim 4 is characterized in that,
Described hydrolytic deterioration coating comprises the composition of poly-(the 2-alpha-cyanoacrylate alkane ester) of at least 50% weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110295360 CN103031122A (en) | 2011-09-29 | 2011-09-29 | Encapsulation gel breaker and preparation method of encapsulation gel breaker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110295360 CN103031122A (en) | 2011-09-29 | 2011-09-29 | Encapsulation gel breaker and preparation method of encapsulation gel breaker |
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| CN103031122A true CN103031122A (en) | 2013-04-10 |
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| CN 201110295360 Pending CN103031122A (en) | 2011-09-29 | 2011-09-29 | Encapsulation gel breaker and preparation method of encapsulation gel breaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498877A (en) * | 2019-09-05 | 2019-11-26 | 大连合元医疗器械有限公司 | Poly- (2- carboxy acrylic) and its preparation method and application |
| WO2021043004A1 (en) * | 2019-09-05 | 2021-03-11 | 大连合元医疗器械有限公司 | Poly[alpha-cyanoacrylate] hydrolyzate and preparation method and applicaiton thereof |
-
2011
- 2011-09-29 CN CN 201110295360 patent/CN103031122A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110498877A (en) * | 2019-09-05 | 2019-11-26 | 大连合元医疗器械有限公司 | Poly- (2- carboxy acrylic) and its preparation method and application |
| WO2021043004A1 (en) * | 2019-09-05 | 2021-03-11 | 大连合元医疗器械有限公司 | Poly[alpha-cyanoacrylate] hydrolyzate and preparation method and applicaiton thereof |
| CN110498877B (en) * | 2019-09-05 | 2022-11-08 | 大连合元医疗器械有限公司 | Poly (2-carboxy acrylic acid) and preparation method and application thereof |
| JP2022547140A (en) * | 2019-09-05 | 2022-11-10 | 大連合元医療器械有限公司 | Hydrolysis product of poly[α-cyanoacrylate], its preparation and use |
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Application publication date: 20130410 |