CN105199704A - Gel breaker for clean fracturing fluid and application method of gel breaker - Google Patents
Gel breaker for clean fracturing fluid and application method of gel breaker Download PDFInfo
- Publication number
- CN105199704A CN105199704A CN201510665038.5A CN201510665038A CN105199704A CN 105199704 A CN105199704 A CN 105199704A CN 201510665038 A CN201510665038 A CN 201510665038A CN 105199704 A CN105199704 A CN 105199704A
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- CN
- China
- Prior art keywords
- gel breaker
- fracturing fluid
- clean fracturing
- gel
- breaker
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/26—Gel breakers other than bacteria or enzymes
Abstract
The invention belongs to the technical field of oil field chemistry, in particular to a gel breaker for clean fracturing fluid and an application method of the gel breaker. The gel breaker is prepared from inorganic salt, ammonium persulfate, tributyl phosphate and a co-solvent; the gel breaker is added into clean fracturing fluid, wherein the dosage of the gel breaker accounts for 0.1%-2% of the mass of a total solution, and uniform stirring is carried out, so that the viscosity of the clean fracturing fluid is reduced. By adopting the gel breaker for the clean fracturing fluid, the problems that the gel breaking of the clean fracturing fluid is difficult and the dosage of the gel breaker is relatively difficult to control due to insufficient formation water are solved; through adding the counter-ion inorganic salt into the gel breaker, the network structure of the original clean fracturing fluid can be damaged and wormlike micelle is decomposed into single free spherical molecules, so that the purpose of gel breaking is realized; by adjusting the contents of all components in the gel breaker, the gel breaking time can be effectively controlled; the gel breaker has the characteristics of being stable in performance, complete in gel breaking, controllable in gel breaking time, good in defoaming effect, low in cost and simple and convenient in on-site construction.
Description
Technical field
The invention belongs to technical field of oilfield chemistry, be specifically related to a kind of gel breaker and using method of clean fracturing fluid, be mainly used in the rapid break of clean fracturing fluid.
Background technology
Clean fracturing fluid is owing to himself to cause the extensive concern of domestic and international oil-gas field without residue, Low Damage, low frictional resistance, snappiness, the row's of helping feature that is effective and easy construction; Clean fracturing fluid is mainly made up of tensio-active agent, gegenion and certain solubility promoter.
Have research to point out, the viscosity due to clean fracturing fluid is the result that molecular association is assembled, so after clean fracturing fluid enters stratum chance oil or local water, vermiform network aggregation state changes, englobement low-viscosity (mobile) liquid, automatically can break glue.
But because reservoir conditions differs greatly, when transform layer be dried layer or fracturing liquid contact insufficient with local water time, of the fracturing fluid broken glue is slow, and for the long celebrating oil-gas field of low, extra-low permeability, the broken in time glue of fracturing fluid, the row of returning become the key factor of reservoir reconstruction success or not especially.
In addition, part alcohols, ethers also have broken glue effect to clean fracturing fluid also to have part research to point out, but due to its dosage comparatively large and return the large contaminate environment of discharge opeing foam and be not easy to recycle on the impact of broken glue time, therefore can not meet needs of constructing at present.
Therefore, a kind of excellent property, defoaming effect good, broken glue the time controlled and gel breaker of the clean fracturing fluid that construction adaptability is strong is necessary to develop.
Summary of the invention
The object of the invention is to solve because local water deficiency causes clean fracturing fluid to break glue difficulty and gel breaker dosage problem more rambunctious.
For this reason, the invention provides a kind of gel breaker of clean fracturing fluid, comprise following component, each component by mass percentage:
Inorganic salt: 0.5 ~ 30%;
Ammonium persulphate: 1.0 ~ 5.0%;
Tributyl phosphate: 0.01 ~ 0.3%;
Solubility promoter: 68.99 ~ 94.2%.
Described inorganic salt are one or more mixtures in calcium chloride, Repone K, ammonium chloride.
Described solubility promoter is one or more mixtures in methyl alcohol, propyl carbinol, ortho-methyl phenol.
The using method of the gel breaker of above-mentioned clean fracturing fluid: add an above-mentioned gel breaker in clean fracturing fluid, make the dosage of gel breaker be 0.1% ~ 2% of total solution quality, uniform stirring makes clean fracturing fluid viscosity degradation to 1 ~ 5mPas.
The gel breaker of above-mentioned clean fracturing fluid obtains using method, adds gel breaker and carry out under 70 ~ 95 DEG C of temperature condition in clean fracturing fluid.
Beneficial effect of the present invention:
The gel breaker of this clean fracturing fluid one, in the present invention has stable performance, breaks the advantages such as glue time controlled, broken glue is thorough, defoaming effect good, cost is low, easy construction.
The gel breaker of this clean fracturing fluid two, in the present invention is under 70 ~ 95 DEG C of conditions, and breaking glue solution viscosity is 1 ~ 5mPas, and broken glue is thorough, is conducive to fracturing fluid recovery (backflow), is applicable to gas well fracturing working fluid.
The gel breaker of this clean fracturing fluid three, in the present invention joins fracturing liquid, is applied in Downhole Construction, can ensure and be constructed into power, and is of value to environmental protection production, has obvious economic benefit and using value.
Embodiment
Embodiment 1:
The present embodiment provides a kind of gel breaker of clean fracturing fluid, comprises following component, each component by mass percentage:
Inorganic salt: 0.5 ~ 30%;
Inorganic salt are herein one or more mixtures in calcium chloride, Repone K, ammonium chloride.
Ammonium persulphate: 1.0 ~ 5.0%;
Tributyl phosphate: 0.01 ~ 0.3%;
Solubility promoter: 68.99 ~ 94.2%.
Solubility promoter is herein one or more mixtures in methyl alcohol, propyl carbinol, ortho-methyl phenol.
The gel breaker adopting the present embodiment to make, is joined in clean fracturing fluid, and stir method test with high, can record half foam life period and not exceed 4 minutes, defoaming effect is obvious; Join in mulling liquid in the ratio progressively increased progressively from low to high adding the sand later stage, construction application is easy.
The transformation period mentioned in the present invention is the high method of stirring and records.The high method of stirring breaking glue solution is stirred under 9000r/min a kind of method that liquid is all become foam by 1min.
The gel breaker of this clean fracturing fluid, can solve because local water deficiency causes clean fracturing fluid to break glue difficulty and gel breaker dosage problem more rambunctious, in gel breaker, gegenion inorganic salt adds the network structure can destroying former clean fracturing fluid molecule, vermiculate glues is made to be decomposed into single free globular molecule, thus reach brokenly glue object, by each component concentration in adjustment gel breaker, can effectively control brokenly the glue time.
Embodiment 2:
The present embodiment provides the using method of the gel breaker of the clean fracturing fluid in a kind of above-described embodiment 1: in clean fracturing fluid, add above-mentioned gel breaker, the dosage of gel breaker is made to be 0.1% ~ 2% of total solution quality, uniform stirring makes clean fracturing fluid viscosity degradation, clean fracturing fluid thoroughly broken glue can be made, viscosity degradation to 1 ~ 5mPas in 30 ~ 120 minutes.
The gel breaker of above-mentioned clean fracturing fluid obtains using method, adds gel breaker and carry out under 70 ~ 95 DEG C of temperature condition in clean fracturing fluid.
Be described below in conjunction with concrete implementation data.
Embodiment 3:
Get ammonium chloride 0.30g, ammonium persulphate 0.15g, tributyl phosphate 0.05g, after ortho-methyl phenol 40g is composite, obtain gel breaker of the present invention.In 100mL clean fracturing fluid, add above-mentioned gel breaker under 80 DEG C of water bath condition, can break glue in 120 minutes, viscosity degradation is to 4mPas, and the breaking glue solution transformation period that height stirs method test is 4 minutes.
Embodiment 4:
Get calcium chloride 0.15g, ammonium persulphate 1.2g, tributyl phosphate 0.15g, after propyl carbinol 25g mixing is composite, obtain gel breaker of the present invention.In 100mL clean fracturing fluid, add above-mentioned gel breaker under 80 DEG C of water bath condition, can break glue in 90 minutes, viscosity degradation is to 3mPa.s, and the breaking glue solution transformation period that height stirs method test is 4 minutes.
Embodiment 5:
Potassium chloride 0.40g, ammonium persulphate 4.0g, tributyl phosphate 0.30g, methyl alcohol 70g mixing is composite obtains gel breaker of the present invention.This concentration is optimum concn.In 100mL clean fracturing fluid, add above-mentioned gel breaker under 90 DEG C of water bath condition, can break glue in 30 minutes, viscosity degradation is to 2mPas, and the breaking glue solution transformation period that height stirs method test is 2.5 minutes.
Embodiment 6:
In conjunction with the embodiments 3, embodiment 4 and embodiment 5, the optimum formula screening of the present embodiment to gel breaker is described, the gel breaker chosen respectively under several groups of different formula rates is tested, under 85 DEG C of conditions, joined respectively in identical clean fracturing fluid by several groups of gel breakers configured, the data obtained are as shown in the table:
As seen from the above table, adopt methyl alcohol and Repone K, add tributyl phosphate and ammonium persulphate, the gel breaker of the preparation under this formula, viscosity drop lower velocity is the fastest; Adopt propyl carbinol and calcium chloride, add tributyl phosphate and ammonium persulphate, the gel breaker of the preparation under this formula, viscosity reduces at most, and effect is best, can according to the different formulas needing selection different.
Embodiment 7:
The present embodiment is described best gel breaker dosage under optimum formula, carries out several groups of tests under choosing differing temps, and the add-on often organizing the gel breaker under uniform temp is different, and after certain hour, record hydrated liquid viscosity, concrete data are as shown in the table:
As seen from the above table: when bath temperature is 75 DEG C, time the add-on of gel breaker is 2%, for optimal addn, but when bath temperature is 85 DEG C, 95 DEG C, do not need to make the add-on of gel breaker reach 2%, time bath temperature is 85 DEG C, 95 DEG C, the add-on of gel breaker is 1% can meet same effect.
In sum, the gel breaker of this clean fracturing fluid of the present invention, can solve because local water deficiency causes clean fracturing fluid to break glue difficulty and gel breaker dosage problem more rambunctious, in gel breaker, gegenion inorganic salt adds the network structure can destroying former clean fracturing fluid molecule, vermiculate glues is made to be decomposed into single free globular molecule, thus reach brokenly glue object, by each component concentration in adjustment gel breaker, can effectively control brokenly the glue time, this gel breaker has self performance and stablizes, broken glue is thorough, the broken glue time is controlled, breaking glue solution foam is few, the advantages such as easy construction.
More than exemplifying is only illustrate of the present invention, does not form the restriction to protection scope of the present invention, everyly all belongs within protection scope of the present invention with the same or analogous design of the present invention.
Claims (5)
1. a gel breaker for clean fracturing fluid, is characterized in that: comprise following component, each component by mass percentage:
Inorganic salt: 0.5 ~ 30%;
Ammonium persulphate: 1.0 ~ 5.0%;
Tributyl phosphate: 0.01 ~ 0.3%;
Solubility promoter: 68.99 ~ 94.2%.
2. the gel breaker of clean fracturing fluid as claimed in claim 1, is characterized in that: described inorganic salt are one or more mixtures in calcium chloride, Repone K, ammonium chloride.
3. the gel breaker of clean fracturing fluid as claimed in claim 1, is characterized in that: described solubility promoter is one or more mixtures in methyl alcohol, propyl carbinol, ortho-methyl phenol.
4. the using method of the gel breaker of the clean fracturing fluid as described in claims 1 to 3, it is characterized in that: in clean fracturing fluid, add above-mentioned gel breaker, make the dosage of gel breaker be 0.1% ~ 2% of total solution quality, uniform stirring makes clean fracturing fluid viscosity degradation to 1 ~ 5mPas.
5. the gel breaker of clean fracturing fluid as claimed in claim 4 obtains using method, it is characterized in that: the described gel breaker that adds in clean fracturing fluid carries out under 70 ~ 95 DEG C of temperature condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510665038.5A CN105199704A (en) | 2015-10-15 | 2015-10-15 | Gel breaker for clean fracturing fluid and application method of gel breaker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510665038.5A CN105199704A (en) | 2015-10-15 | 2015-10-15 | Gel breaker for clean fracturing fluid and application method of gel breaker |
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| CN105199704A true CN105199704A (en) | 2015-12-30 |
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| CN201510665038.5A Pending CN105199704A (en) | 2015-10-15 | 2015-10-15 | Gel breaker for clean fracturing fluid and application method of gel breaker |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105670596A (en) * | 2016-03-29 | 2016-06-15 | 咸阳万众生物科技有限公司 | High-temperature-resistant automatic gel breaking type surfactant fracturing fluid |
| CN106590612A (en) * | 2016-11-17 | 2017-04-26 | 新疆正通石油天然气股份有限公司 | Low temperature breaking agent of crosslinking association polymer fracturing fluid and preparation method and using method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481608A (en) * | 2009-01-19 | 2009-07-15 | 中国石油大学(华东) | Clean fracturing fluid and use thereof |
-
2015
- 2015-10-15 CN CN201510665038.5A patent/CN105199704A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481608A (en) * | 2009-01-19 | 2009-07-15 | 中国石油大学(华东) | Clean fracturing fluid and use thereof |
Non-Patent Citations (2)
| Title |
|---|
| 夏亮亮: "两性/阴离子表面活性剂清洁压裂液性能评价", 《油田化学》 * |
| 鲁红升，等: "清洁压裂液用破胶剂的研究", 《应用化工》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105670596A (en) * | 2016-03-29 | 2016-06-15 | 咸阳万众生物科技有限公司 | High-temperature-resistant automatic gel breaking type surfactant fracturing fluid |
| CN106590612A (en) * | 2016-11-17 | 2017-04-26 | 新疆正通石油天然气股份有限公司 | Low temperature breaking agent of crosslinking association polymer fracturing fluid and preparation method and using method thereof |
| CN106590612B (en) * | 2016-11-17 | 2019-10-01 | 新疆正通石油天然气股份有限公司 | It is crosslinked association polymer fracturing fluid low temperature gel breaker and preparation method and application method |
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Application publication date: 20151230 |