CN103265939A - Fracturing fluid thickening agent and preparation and application thereof - Google Patents
Fracturing fluid thickening agent and preparation and application thereof Download PDFInfo
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Abstract
The invention relates to a fracturing fluid thickening agent and preparation and application thereof. The thickening agent is mainly prepared from the following components in percentage by weight: 15-20% of acrylamide monomer, 6-10% of acrylic monomer, 3-6% of sodium carbonate, 3-8% of 2-acrylamide-2-methylpropanesulsonic acid, 1-4% of dimethyldiallylammonium chloride (60% aqueous solution), 0.03-0.08% of potassium persulfate and the balance of water. The preparation comprises the following steps of: adding the acrylic monomer and water into a reaction kettle; starting stirring and slowly adding sodium carbonate, wherein the adding speed is proper when the bubbles generated by the reaction do not overflow out of the reaction kettle; stirring till sufficient dissolution; adding 2-acrylamide-2-methylpropanesulsonic acid, and stirring till sufficient and uniform mixing; adding the acrylamide monomer and dimethyldiallylammonium chloride, and stirring till sufficient dissolution; heating the reaction liquid to 40 DEG C, introducing nitrogen, and performing thermal insulation stirring for 20 minutes; adding potassium persulfate; continuously introducing nitrogen, and stirring for 30 minutes; stopping the stirring, and reacting for 4 hours to obtain gel; and grinding the reaction product, drying and granulating to obtain the thickening agent.
Description
Technical field
The invention relates to a kind of fracturing fluid thickener and preparation thereof and application.
Background technology
Fracturing technique is one of major measure of oil field middle and later periods exploitation volume increase, and the quality of fracturing liquid system performance directly influences the fracturing reform effect.At present, China uses more fracturing liquid system still to be guanidine gum fracturing fluid.Because hydroxypropyl guanidine glue (one-level) prices of raw and semifnished materials have increased the pressure break cost greatly by 18300 yuan of/ton 158000 yuan/ton of rising to 2012 in 2010, have restricted the popularization of fracturing technique.Guanidine glue belongs to the plant class, should not store, and is under the situation of summer high-temperature, corrupt easily.
Therefore, it is extremely urgent to research and develop the low-cost fracturing liquid of novel low residue.The fracture acidizing center technician of Liaohe Oil Field drilling technical study institute has developed the relevant auxiliary products of polymkeric substance fracturing liquid through more than a year scientific research.This polymkeric substance fracturing liquid is formed by thickening material and other additive mixed preparing, and construction process and guanidine gum fracturing fluid are basic identical.Simultaneously on the basis of not improving current pressure break cost, every performance of this fracturing liquid system is not less than or near conventional guanidine gum fracturing fluid.Can substitute conventional guanidine gum fracturing fluid fully.
At the research initial stage, we understand domestic application non-plant glue and originally are mainly used in fields such as the displacement of reservoir oil, water blockoff, and the application on the pressure break is mainly clean fracturing fluid.But clean fracturing fluid can not satisfy existing fracturing technique, and its viscosity is low, and the bad shortcoming of temperature resistance has restricted the pressure break scale.So we develop a kind of can crosslinked gel stable voluntarily, temperature resistance effect good fracturing liquid again is extremely urgent.
Summary of the invention
One object of the present invention is to provide a kind of fracturing fluid thickener.
Another object of the present invention is to provide the preparation method of described fracturing fluid thickener.
A further object of the present invention is to provide the application of described fracturing fluid thickener in fracturing liquid.
For reaching above-mentioned purpose, on the one hand, the invention provides a kind of fracturing fluid thickener, described thickening material mainly is prepared from by following weight percent composition: acrylamide monomer (AM) 15～20%, Acrylic Acid Monomer (AA) 6～10%, yellow soda ash 3～6%, 2-acrylamido-2-methyl propane sulfonic acid 3～8%, dimethyl diallyl ammonium chloride (60% aqueous solution) 1～4%, Potassium Persulphate 0.03-0.08%, surplus are water.
Be 100% in acrylamide monomer, Acrylic Acid Monomer, yellow soda ash, 2-acrylamido-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride (60% aqueous solution), Potassium Persulphate and water gross weight wherein.
The acrylamide that acrylamide monomer wherein, Acrylic Acid Monomer just refer to and vinylformic acid are the conventional reagent in this area, those skilled in the art are reading on the specification sheets of the present invention basis, can select this area mentioned reagent commonly used, the commercially available any aforesaid propylene amide monomer, the Acrylic Acid Monomer that for example meet the respective quality standard all can be used for the present invention.
This fracturing fluid thickener contains two kinds of anionic groups, belongs to quarternary copolymerized product.Acrylamide plays viscosifying action in polymkeric substance, and vinylformic acid provides crosslinkable group, and 2-acrylamido-2-methyl propane sulfonic acid and dimethyl diallyl ammonium chloride can improve the anti-shearing effect of of the fracturing fluid heatproof.In actual applications, the of the fracturing fluid dosing construction process of this polymkeric substance was with guanidine gum fracturing fluid was the same in the past, and it is the same substantially with guanidine gum fracturing fluid that swelling plays sticking speed, and swelling time was beneficial to on-the-spot dosing construction less than 15 minutes, and 0.5% thickening material viscosity can reach 60mpas.
In order further to improve the effect of fracturing fluid thickener of the present invention, the further preferred acrylamide monomer of the present invention, Acrylic Acid Monomer, yellow soda ash, 2-acrylamido-2-methyl propane sulfonic acid and dimethyl diallyl ammonium chloride (60% aqueous solution) total weight percent concentration are 28～48%.
Be 100% in acrylamide monomer, Acrylic Acid Monomer, yellow soda ash, 2-acrylamido-2-methyl propane sulfonic acid, dimethyl diallyl ammonium chloride, Potassium Persulphate and water gross weight wherein.
Wherein water of the present invention preferably adopts deionized water.
On the other hand, the present invention also provides the preparation method of described fracturing fluid thickener, and described method comprises the steps:
(1) in reactor, adds Acrylic Acid Monomer and water, open and stir back adding yellow soda ash (bubble that feed rate produces with reaction does not overflow reactor and is as the criterion), be stirred to abundant dissolving;
(2) add 2-acrylamido-2-methyl propane sulfonic acid (bubble that feed rate produces with reaction does not overflow reactor and is as the criterion), be stirred to abundant mixing;
(3) add acrylamide monomer and dimethyl diallyl ammonium chloride (60% aqueous solution), be stirred to abundant dissolving; Reacting liquid temperature is risen to 40 ℃ then, feed nitrogen, insulated and stirred 20min;
(4) add Potassium Persulphate, the logical nitrogen of continuation stirs 30min, stops to stir, and reacts namely to get gel in 4 hours;
(5) with reaction product pulverizing, oven dry, the granulation of step (5), namely get described thickening material.
Wherein step (1), (2) and (3) described being stirred to fully are dissolved as stirring 20min, and step (4) stirs 30min.
Described stirring uses the existing common equipment in this area to get final product, and namely stirs according to the stirring velocity of existing installation to get final product, and this stirring velocity there is no materially affect for the realization of the object of the invention.
Wherein the feeding nitrogen of step (4) is this area common method, namely uses the prior art common equipment to feed nitrogen and gets final product.
According to method of the present invention, the described reaction of step (4) can be with reference to the reaction conditions of the similar reaction of prior art, the i.e. reaction of handling step of the present invention (4) according to existing similar reaction conditions can obtain thickening material of the present invention, yet in order further to improve thickening material performance of the present invention, and further improving reaction efficiency of the present invention, the present invention preferably reacted 4 hours down at 40 ℃.
Wherein be reflected at static condition and get final product, need not to stir; Resulting gel-strength is higher, adopts the general disintegrating apparatus in this area can directly carry out pulverization process, and need not other any processing.
In order further to improve reaction efficiency, even described Potassium Persulphate can be formulated as weight percent concentration be 1% solution, again it added reaction system in proportion.
On the other hand, the present invention also provides the application of described fracturing fluid thickener in the fracturing liquid preparation.
According to application of the present invention, wherein fracturing liquid is preferably the non-plant fracturing fluid.
Again on the one hand, the present invention also provides the fracturing liquid of thickening material preparation of the present invention;
According to fracturing liquid of the present invention, the present invention further preferred described fracturing liquid also comprises the linking agent that following weight percent composition prepares: organic acid: 15～30%, mineral alkali: 4～8%, organic amine: 10～18%, trivalent metal ion salts: 4～10%, the tetravalence zirconates: 7～15%, aldehyde: 1～5%, surplus is water; Described per-cent is 100% in the linking agent gross weight.
According to fracturing liquid of the present invention, wherein preferred described organic acid is a kind of in tartrate, citric acid, the lactic acid; Described mineral alkali is one or more the mixing in sodium bicarbonate, yellow soda ash, sodium hydroxide, the potassium hydroxide; Described organic amine is trolamine; Described trivalent metal ion salts is one or more the mixing in chromium trichloride, aluminum chloride, the Tai-Ace S 150; Described tetravalence zirconates is zirconium tetrachloride, zirconium oxychloride or the mixing of the two; Described aldehyde be formaldehyde, oxalic dialdehyde, one or more mixing in the glutaraldehyde.
According to fracturing liquid of the present invention, wherein the thickening material weight percent is 0.4-0.7% in the further preferred described fracturing liquid, and the linking agent weight percent is 0.6-0.8%; Described per-cent is 100% in the fracturing liquid gross weight.
According to fracturing liquid of the present invention, wherein said fracturing liquid can add common agents in the prior art fracturing liquid, this of the fracturing fluid common agents can be determined according to the construction needs by those skilled in the art, the selection of this common agents is not that the present invention pays close attention to, and for example fracturing liquid of the present invention also comprises additives such as cleanup additive, complexing agent, clay stabilizer, gel breaker, the broken promoter for rubber of low temperature;
Wherein further preferred cleanup additive weight percent is that 0.2-0.3%, clay stabilizer weight percent are that 0.6-0.8%, gel breaker weight percent are that the broken promoter for rubber weight percent of 0.1-0.3%, low temperature is 0-0.2%; Per-cent wherein is 100% in the fracturing liquid gross weight.
In sum, the invention provides a kind of fracturing fluid thickener and preparation thereof and application.Fracturing fluid thickener of the present invention has following advantage:
(1) adopts quarternary copolymerized prescription, improved tackify, the temperature resistance shear-stable ability of thickening material;
(2) preceding alkali addition process has improved the yield rate of product.
(3) use with supporting linking agent and can be used for pressing crack construction, high sand ratio can reach 55%, and breaking glue solution viscosity is less than 5mPas.
Thickening material of the present invention, the fast tackify of dissolution rate is effective.0.5% thickening material just can dissolve, and can meet the pressing crack construction requirement after evenly adding in 15 minutes fully.Become glue stable, heatproof can reach 150 ℃.
Description of drawings
Fig. 1 is 90 ℃ of flow curves of fracturing liquid that the thickening material of the embodiment of the invention 3 is mixed with.
Fig. 2 is 110 ℃ of flow curves of fracturing liquid that the thickening material of the embodiment of the invention 3 is mixed with.
Embodiment
Below describe the beneficial effect of implementation process of the present invention and generation in detail by specific embodiment, be intended to help the reader to understand essence of the present invention and characteristics better, but not as the restriction to this case practical range.
Embodiment 1
The preparation method:
(1) add 12g Acrylic Acid Monomer and 132g water in the 500ml there-necked flask, open and stir the back slow 6g of adding yellow soda ash, the bubble that feed rate produces with reaction does not overflow there-necked flask and is as the criterion, and stirs extremely fully dissolving of 20min;
(2) slowly add 6g2-acrylamido-2-methyl propane sulfonic acid, stir 20min to fully dissolving;
(3) add 30g acrylamide monomer, 2g dimethyl diallyl ammonium chloride (60% aqueous solution), stir 20min to fully dissolving; Stir, the maintenance system temperature is 40 degree, and feeds nitrogen 20min;
(4) add the 12ml1% potassium persulfate solution, the logical nitrogen 30min of continuation stops to stir, and reacts namely to get gel in 4 hours;
(5) with reaction product pulverizing, oven dry, the granulation of step (4), namely get described thickening material.
Embodiment 2
(1) add 16g Acrylic Acid Monomer and 118g water in the 500ml there-necked flask, open and stir the back slow 9g of adding yellow soda ash, the bubble that feed rate produces with reaction does not overflow there-necked flask and is as the criterion, and stirs extremely fully dissolving of 20min;
(2) slowly add 10g2-acrylamido-2-methyl propane sulfonic acid, stir 20min to fully dissolving;
(3) add 35g acrylamide monomer, 4g dimethyl diallyl ammonium chloride (60% aqueous solution), stir 20min to fully dissolving; Stir, the maintenance system temperature is 40 degree, and feeds nitrogen 20min;
(4) add the 8ml1% potassium persulfate solution, the logical nitrogen 30min of continuation stops to stir, and reacts namely to get gel in 4 hours;
(5) with reaction product pulverizing, oven dry, the granulation of step (4), namely get described thickening material.
Embodiment 3
(1) add 20g Acrylic Acid Monomer and 96g water in the 500ml there-necked flask, open and stir the back slow 12g of adding yellow soda ash, the bubble that feed rate produces with reaction does not overflow there-necked flask and is as the criterion, and stirs extremely fully dissolving of 20min;
(2) slowly add 16g2-acrylamido-2-methyl propane sulfonic acid, stir 20min to fully dissolving;
(3) add 40g acrylamide monomer, 8g dimethyl diallyl ammonium chloride (60% aqueous solution), stir 20min to fully dissolving; Stir, the maintenance system temperature is 40 degree, and feeds nitrogen 20min;
(4) add the 8ml1% potassium persulfate solution, the logical nitrogen 30min of continuation stops to stir, and reacts namely to get gel in 4 hours;
(5) with reaction product pulverizing, oven dry, the granulation of step (4), namely get described thickening material.
Embodiment 4
Of the fracturing fluid preparation:
The thickening material of thickening material: embodiment 1 preparation.
Linking agent: citric acid: 15%, mineral alkali: 4%, organic amine: 10%, trivalent metal ion salts: 4%, the tetravalence zirconates: 7%, aldehyde: 1%, surplus is water; Described per-cent is 100% in the linking agent gross weight.
The fracturing liquid composition: preferred thickener weight percent 0.4%, linking agent weight percent are 0.6%, the cleanup additive weight percent is 0.2%, the clay stabilizer weight percent is 0.6%, the gel breaker weight percent is 0.1%, the broken promoter for rubber weight percent of low temperature is 0.1% (cleanup additive, clay stabilizer, gel breaker, the broken promoter for rubber of low temperature are the conventional auxiliary agent of oil field compression fracture, adopt Panjin to converge the product of bright Industrial Co., Ltd. production in the present embodiment); Described per-cent is 100% in the fracturing liquid gross weight.
Fracturing liquid preparation: measure the 400ml tap water and pour mixed the accent in the device into, open 1 grade of stirring, taking by weighing the 1.6g thickening material slowly pours into, stir and poured in the beaker in 3 minutes, regulate pH value to 6 with dilute hydrochloric acid, when stirring with glass stick, add cleanup additive 0.8g, clay stabilizer 2.4g, gel breaker 0.4g, the broken promoter for rubber 0.4g of low temperature, stir, add the 2.4g linking agent, stir formation and hang frozen glue.
Embodiment 5
The thickening material of thickening material: embodiment 2 preparations.
Linking agent: citric acid: 20%, mineral alkali: 6%, organic amine: 13%, trivalent metal ion salts: 7%, the tetravalence zirconates: 11%, aldehyde: 3%, surplus is water; Described per-cent is 100% in the linking agent gross weight.
The fracturing liquid composition: preferred thickener weight percent 0.5%, linking agent weight percent are 0.7%, the cleanup additive weight percent is 0.2%, the clay stabilizer weight percent is 0.8%, the gel breaker weight percent is 0.1%, the broken promoter for rubber weight percent of low temperature is 0.2% (cleanup additive, clay stabilizer, gel breaker, the broken promoter for rubber of low temperature are the conventional auxiliary agent of oil field compression fracture, adopt Panjin to converge the product of bright Industrial Co., Ltd. production in the present embodiment); Described per-cent is 100% in the fracturing liquid gross weight.
Fracturing liquid preparation: measure the 400ml tap water and pour in the mixed accent of the Wu Yin device, open 1 grade of stirring, taking by weighing the 2g thickening material slowly pours into, stir and poured in the beaker in 3 minutes, regulate pH value to 6 with dilute hydrochloric acid, when stirring with glass stick, add cleanup additive 0.8g, clay stabilizer 3.2g, gel breaker 0.4g, the broken promoter for rubber 0.8g of low temperature, stir, add the 2.8g linking agent, stir formation and hang frozen glue.
Embodiment 6
The thickening material of thickening material: embodiment 3 preparations.
Linking agent: citric acid: 30%, mineral alkali: 8%, organic amine: 18%, trivalent metal ion salts: 10%, the tetravalence zirconates: 15%, aldehyde: 5%, surplus is water; Described per-cent is 100% in the linking agent gross weight.
The fracturing liquid composition: preferred thickener weight percent 0.7%, linking agent weight percent are 0.8%, the cleanup additive weight percent is 0.3%, the clay stabilizer weight percent is 0.8%, the gel breaker weight percent is 0.2%, the broken promoter for rubber weight percent of low temperature is 0% (cleanup additive, clay stabilizer, gel breaker, the broken promoter for rubber of low temperature are the conventional auxiliary agent of oil field compression fracture, adopt Panjin to converge the product of bright Industrial Co., Ltd. production in the present embodiment); Described per-cent is 100% in the fracturing liquid gross weight.
Fracturing liquid preparation: measure the 400ml tap water and pour in the mixed accent of the Wu Yin device, open 1 grade of stirring, taking by weighing the 2.8g thickening material slowly pours into, stir and poured in the beaker in 3 minutes, regulate pH value to 6 with dilute hydrochloric acid, when stirring with glass stick, add cleanup additive 1.2g, clay stabilizer 3.2g, gel breaker 0.8g, the broken promoter for rubber 0g of low temperature, stir, add the 3.2g linking agent, stir formation and hang frozen glue.
The conventional fracturing fluid thickener product standard of using in this area sees the following form:
Table 1 has the fracturing fluid thickener product standard now
| Project | Index |
| Outward appearance | White or little band yellow powder solid |
| Moisture, %≤ | 12 |
| Screen over-size (30 order), %≤ | 10 |
| Solution viscosity (0.5%), mPas 〉= | 50 |
| Swelling time, min≤ | 20 |
And the thickening material parameter that embodiment 1～3 obtains is as shown in the table:
Table 2, embodiment 1～3 product parameters
Adopting embodiment 3 polymkeric substance is thickening material, and the solution of preparation 0.6% is 5.5-6.5 with the salt acid for adjusting pH value, and the adding linking agent can form and hang frozen glue,
The fracturing liquid flow curve that the thickening material of employing embodiment 3 is mixed with as shown in Figure 1 and Figure 2.
Its testing conditions is: RV20 rheometer, 90 ℃, 110 ℃, 170s
-1Shear 120min, pH value of solution=6.5.
As can be seen from Figure, be respectively 90 degree and 110 when spending, with 170s in temperature
-1Shearing rate sheared 2 hours, still more than 50mPas, it is qualified to be for viscosity, illustrate that the fracturing liquid temperature tolerance can reach 90 degree or 110 and spend.
2012, adopt embodiment 3 polymkeric substance fracturing liquids 18 wells of constructing altogether, the volume increase oil increasing effect is remarkable, compares with guanidine gum fracturing fluid, and the construction correctional effect is suitable.
Test example 1
On August 2nd, 2012, limit, Liaohe Oil Field 35-20 well pressing crack construction adopts embodiment 3 polymkeric substance fracturing liquids to carry out pressure break, wherein polymer-thickened agent content is 0.6%, viscosity is 63mPas before crosslinked, and the crosslinked state that hangs is good, pumps into 325 side's liquid altogether, 43 side's haydites, discharge capacity 3.0-5.0 side/min, construction is finished smoothly, presses the back closing well 1 hour, the row's of returning 183 side's liquid, returning discharge opeing viscosity is 2mPas.
Test example 2
On September 19th, 2012,26-12 well pressing crack construction is won in the Liaohe Oil Field, adopts embodiment 3 polymkeric substance fracturing liquids to carry out pressure break, wherein polymer-thickened agent content is 0.6%, viscosity is 63mPas before crosslinked, and the crosslinked state that hangs is good, pumps into 400 side's liquid altogether, 47 side's haydites, discharge capacity 3.4-4.6 side/min, construction is finished smoothly, presses the back closing well 1 hour, the row's of returning 216 side's liquid, returning discharge opeing viscosity is 2mPas.
The present invention also provides following Comparative Examples, to further specify the effect of product of the present invention:
Contrast product 1:AM/AMPS/AA terpolymer fracturing fluid gelatinizer
Described AM/AMPS/AA terpolymer fracturing fluid gelatinizer is according to " synthesizing of AM/AMPS/AA terpolymer fracturing fluid gelatinizer " (" drilling fluid and well finishing liquid " 27 4 phases of volume) preparation, and wherein prescription is: AA2%, AMPS16%, AM20%, ammonium persulphate 0.12%, sodium bisulfite 0.12%, sodium hydroxide 0.5%.
Use conventional non-plant fracturing fluid to add the present application embodiment 3 thickening materials and contrast product 1 preparing fracturing fluid respectively, and compare correlation data such as following table 3:
Shear resistant test: 90 degrees centigrade of temperature, shearing rate 170s
-1
The contrast of table 3 viscosity
| Time/ |
0 | 30 | 60 | 90 | 120 |
| Contrast product 1 viscosity/mPa.s | 240 | 110 | 80 | 51 | 36 |
| Product viscosity/mPa.s of the present invention | 1500 | 600 | 390 | 160 | 87 |
The crosslinked gel initial viscosity is high 5 times, and shear resistant (clipping to the identical viscosities required time) improves 1 times, has significant advantage.
Contrast product 2:
According to patent 201010260450.6 preparations, filling a prescription is: AM20%, AA8%, AMPS15%, NVP6%, surplus are water.
The present invention adopts dimethyl diallyl ammonium chloride to replace vinyl pyrrolidone, has effectively increased anti-shear ability and has taken the grittiness energy.
Use conventional non-plant fracturing fluid to add the present application embodiment 3 thickening materials and contrast product 2 preparing fracturing fluids respectively, and compare correlation data such as following table 4, table 5:
(1) shear resistant test: 90 degrees centigrade of temperature, shearing rate 170s
-1
The contrast of table 4 viscosity
| Time/ |
0 | 30 | 60 | 90 | 120 |
| Contrast product 2 viscosity/mPa.s | 630 | 210 | 105 | 69 | 36 |
| Product viscosity/mPa.s of the present invention | 1500 | 600 | 390 | 160 | 87 |
Shear resistant (clipping to the identical viscosities required time) improves about 2 times;
Sand settling time contrast: take sand than 30%, room temperature;
The contrast of table 5 sand settling time
| Sand rate of descent/% | 5 | 10 | 15 | 20 | 25 |
| 2 times of contrast product/ |
50 | 120 | 230 | 380 | 590 |
| Product time/min of the |
90 | 210 | 410 | 690 | 1200 |
Product of the present invention is high about 1 times than contrast product 2 outstanding grittiness, has greatly reduced the sand plug risk of pressing crack construction, and what be conducive to construct carries out smoothly.
The other embodiments of the invention product also uses above-mentioned identical non-plant fracturing fluid to carry out the contrast experiment respectively, result and above-mentioned similar, because length is limit, the present invention enumerates no longer one by one.
Claims (10)
1. fracturing fluid thickener, it is characterized in that described thickening material mainly is prepared from by following weight percent composition: acrylamide monomer 15～20%, Acrylic Acid Monomer 6～10%, yellow soda ash 3～6%, 2-acrylamido-2-methyl propane sulfonic acid 3～8%, 60% aqueous solution 1～4% of dimethyl diallyl ammonium chloride, Potassium Persulphate 0.03-0.08%, surplus are water.
2. thickening material according to claim 1 is characterized in that, the total weight percent concentration of 60% aqueous solution of acrylamide monomer, Acrylic Acid Monomer, yellow soda ash, 2-acrylamido-2 methyl propane sulfonic acid and dimethyl diallyl ammonium chloride is 28～48%.
3. the preparation method of claim 1 or 2 described thickening materials is characterized in that, described method comprises the steps:
(1) in reactor, adds Acrylic Acid Monomer and water, open and stir back adding yellow soda ash, be stirred to abundant dissolving;
(2) add 2-acrylamido-2-methyl propane sulfonic acid, be stirred to abundant dissolving;
(3) 60% aqueous solution of adding acrylamide monomer and dimethyl diallyl ammonium chloride is stirred to abundant dissolving; Reacting liquid temperature is risen to 40～60 ℃ then, feed nitrogen, insulated and stirred 20min;
(4) add Potassium Persulphate, the logical nitrogen of continuation stirs 30min, stops to stir, and reacts namely to get gel in 4 hours;
(5) with reaction product pulverizing, oven dry, the granulation of step (4), namely get described thickening material.
4. claim 1 or 2 described fracturing fluid thickeners are used in the fracturing liquid preparation.
5. application according to claim 4 is characterized in that, described fracturing liquid is the non-plant fracturing fluid.
6. the fracturing liquid of a claim 1 or 2 described thickening materials preparations.
7. fracturing liquid according to claim 6, it is characterized in that, described fracturing liquid also comprises the linking agent of following weight percent composition preparation: organic acid: 15～30%, mineral alkali: 4～8%, organic amine: 10～18%, trivalent metal ion salts: 4～10%, tetravalence zirconates: 7～15%, aldehyde: 1～5%, surplus is water; Described per-cent is 100% in the linking agent gross weight.
8. fracturing liquid according to claim 7 is characterized in that, described organic acid is a kind of in tartrate, citric acid, the lactic acid; Described mineral alkali is one or more the mixing in sodium bicarbonate, yellow soda ash, sodium hydroxide, the potassium hydroxide; Described organic amine is trolamine; Described trivalent metal ion salts is one or more the mixing in chromium trichloride, aluminum chloride, the Tai-Ace S 150; Described tetravalence zirconates is zirconium tetrachloride, zirconium oxychloride or the mixing of the two; Described aldehyde be formaldehyde, oxalic dialdehyde, one or more mixing in the glutaraldehyde.
9. according to any described fracturing liquid of claim 6～8, it is characterized in that the thickening material weight percent is 0.4-0.7% in the described fracturing liquid, the linking agent weight percent is 0.6-0.8%; Described per-cent is 100% in the fracturing liquid gross weight.
10. fracturing liquid according to claim 9 is characterized in that, described fracturing liquid also comprises cleanup additive, complexing agent, clay stabilizer, gel breaker, the broken promoter for rubber of low temperature; Preferred cleanup additive weight percent is that 0.2-0.3%, clay stabilizer weight percent are that 0.6-0.8%, gel breaker weight percent are that the broken promoter for rubber weight percent of 0.1-0.3%, low temperature is 0-0.2%.
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| CN109306630B (en) * | 2018-09-29 | 2024-06-18 | 广东灵捷制造化工有限公司 | Cross-linking agent for aqueous acrylic adhesive and obtained adhesive |
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| CN110028623A (en) * | 2019-05-10 | 2019-07-19 | 四川洁能锐思石油技术有限公司 | A kind of high capability of anti-salt complexity water quality dry powder crosslinked fracturing fluid system and its preparation method and application |
| CN111363095A (en) * | 2020-04-16 | 2020-07-03 | 陕西科技大学 | Modified polyacrylamide grafted natural vegetable gum, preparation method thereof and application thereof in oil field |
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| CN113698541A (en) * | 2021-08-30 | 2021-11-26 | 大庆长垣能源科技有限公司 | Preparation method of low-temperature gel breaking alcohol-based anti-swelling fracturing system |
| CN113698541B (en) * | 2021-08-30 | 2022-04-29 | 大庆长垣能源科技有限公司 | Preparation method of low-temperature gel breaking alcohol-based anti-swelling fracturing system |
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