Fiber sand control stabilizer for fracturing and preparation method and fracturing fluid system

Abstract

The application belongs to the technical field of oil exploitation, and particularly relates to a fiber sand prevention stabilizer for fracturing, a preparation method thereof and a fracturing fluid system. The fiber sand prevention stabilizer for fracturing comprises the following raw material components: a cationic polymer, hexadecyl trimethyl ammonium bromide and chlorinated hexadecyl pyridine. The cationic polymer comprises the following raw material components: 18-22 parts of polybutylene glycol, 14-18 parts of isophorone diisocyanate, 3-5 parts of N-methyl diethanolamine, 1-3 parts of acetic acid and 56-60 parts of water. The weight ratio of the cationic polymer, the hexadecyl trimethyl ammonium bromide and the chlorinated hexadecyl pyridine is 5:2:1. The fiber sand prevention stabilizer for fracturing enhances the sand prevention performance of the existing fiber product by changing the surface properties of the proppant, and realizes better sand carrying and blocking effects.

Description

Technical Field

[0001] This invention belongs to the field of petroleum extraction technology, specifically relating to a fiber-based sand stabilizer for fracturing, its preparation method, and a fracturing fluid system. Background Technology

[0002] With the integrated application of various technologies in oil and gas fields and the continuous development of extraction techniques, fracturing technology has gradually become a major measure for increasing production in low-permeability oil and gas fields. However, as the scale of proppant fracturing in gas wells continues to expand, the problem of proppant backflow and sand production caused by rapid blowout and fluid drainage is becoming increasingly prominent. Due to the high pressure, high production, and high flow rate of gas wells, on the one hand, some of the fractured proppant migrates and accumulates towards the wellbore, reducing the long-term conductivity of the fractures; on the other hand, the backflow of proppant and sand has a very strong erosive and destructive effect on the wellhead and surface pipelines. Sand production during blowout poses a significant safety hazard to surface equipment and personnel, and also negatively impacts the fracturing effect, directly leading to reduced gas well production.

[0003] Frequent sand production during fracturing necessitates effective sand control measures. One such measure is fracturing sand control, which involves pumping composite materials along with the proppant into the formation during fracturing to increase production while controlling sand production. Existing fracturing sand control technologies are mainly categorized into three types: tail-mounted large-particle sand, coated sand, and fiber-reinforced sand. Among these methods, "tail-tracking large-diameter proppant" refers to adding large-diameter proppant to the fracture opening or a well-formed fracture area during a single fracturing operation. The small supporting pores of the large-diameter proppant reduce the fluid velocity near the wellbore, thus weakening the scouring and carrying effect on smaller particles. However, conventional tail-tracking large-diameter proppant methods are difficult to implement near the wellbore. "Coated sand" involves coating the surface of fracturing quartz sand particles with a thin, resilient resin layer. This coating changes the proppant contact from point contact to contact with a certain area. The resin layer polymerizes and solidifies under the action of a curing agent, thus binding the particles together. However, the permeability and conductivity of coated sand are not ideal. "Fiber-based sand control" involves injecting fiber-mixed proppant-carrying fluid into the fracture. The fibers intertwine and form a stable three-dimensional network structure to encapsulate the proppant particles. When the fracture closes after fracturing, the particles interact through contact to achieve mechanical equilibrium, thus achieving sand control.

[0004] Although fiber mixing is currently the preferred sand control technology with outstanding advantages such as long effective period and controllable cost, there is still room for further expansion and improvement of the performance of sand control fibers.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a fiber-based sand control stabilizer for fracturing, its preparation method, and a fracturing fluid system. This fiber-based sand control stabilizer enhances the sand control performance of existing fiber products by changing the surface properties of the proppant, thereby achieving a better sand-carrying and sand-blocking effect.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A fiber-based sand stabilizer for fracturing comprises the following raw material components: cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride;

[0009] By weight, the cationic polymer comprises the following raw material components: 18-22 parts of polybutanediol, 14-18 parts of isophorone diisocyanate, 3-5 parts of N-methyldiethanolamine, 1-3 parts of acetic acid, and 56-60 parts of water.

[0010] The cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride are in a weight ratio of 5:2:1.

[0011] Further, by weight, the cationic polymer comprises the following raw material components: 20 parts polybutanediol, 16 parts isophorone diisocyanate, 4 parts N-methyldiethanolamine, 2 parts acetic acid, and 58 parts water.

[0012] In addition, the present invention also provides a method for preparing the fiber-reinforced sand stabilizer for fracturing as described above, comprising the following steps:

[0013] S1, polybutanediol and isophorone diisocyanate undergo a polycondensation reaction to obtain a prepolymer;

[0014] S2. The prepolymer obtained in step S1 is subjected to an addition polymerization reaction with N-methyldiethanolamine to obtain a high molecular polymer.

[0015] S3. Acetic acid is added to the polymer obtained in step S2 to carry out a neutralization reaction; after the reaction is completed, water is added and emulsified to obtain a cationic polymer.

[0016] S4. The cationic polymer, hexadecyltrimethylammonium bromide and hexadecylpyridine chloride are stirred and mixed evenly in proportion to obtain the fiber sand control stabilizer for fracturing.

[0017] Furthermore, polybutanediol and isophorone diisocyanate were placed in a vacuum drying oven and dried at 105°C for 3 hours before undergoing a polycondensation reaction.

[0018] Further, in step S1, the polycondensation reaction conditions are: reaction temperature 70-75°C; reaction time 1-1.2 h;

[0019] And / or, the polycondensation reaction is carried out under dry nitrogen protection conditions.

[0020] Further, in step S2, the addition polymerization reaction conditions are: stirring at 75-80°C for 1-1.2 hours.

[0021] Further, in step S3, after cooling the polymer obtained in step S2 to 45°C, acetic acid is added while stirring to carry out a neutralization reaction;

[0022] And / or, in step S3, add water and emulsify for 30–35 minutes.

[0023] In addition, the present invention also provides a fracturing fluid system, including the above-mentioned fiber sand control stabilizer for fracturing and the fiber sand control stabilizer for fracturing prepared by the above-mentioned preparation method.

[0024] Further, by weight, the raw material components include the following: 0.1 to 0.2 parts of fiber sand stabilizer for fracturing, 1.8 to 2 parts of low molecular weight thickener emulsion for fracturing, 0.1 to 0.2 parts of breaker, 0.1 to 0.2 parts of fiber, and the remainder is water, and the total weight of the raw material components is 100 parts.

[0025] Furthermore, the fracturing fluid system is prepared as follows: the low molecular weight thickener emulsion and the breaker for fracturing are added to water while stirring, mixed and allowed to stand, and then the fiber and the fiber sand stabilizer for fracturing are added and stirred for 15-20 minutes to disperse them evenly, thus obtaining the fracturing fluid system.

[0026] Compared with the prior art, the technical solution of the present invention has at least the following technical effects:

[0027] The fiber-based sand stabilizer for fracturing provided by this invention is a long-chain, branched cationic polymer. After naturally unfolding in aqueous solution due to electrical effects, it can be adsorbed onto the surface of the negatively charged proppant, increasing its surface potential. This causes the dispersed proppant to bridge together and form mutually attractive particle aggregates, thereby increasing the critical flow velocity of the proppant and improving problems such as poor fiber sand control stability and low sand fixation efficiency. It also plays a more effective role in carrying sand and preventing proppant backflow. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be clearly and completely described below in conjunction with the embodiments of this invention. Those skilled in the art should understand that the embodiments described are merely illustrative of the invention and should not be considered as specific limitations thereof. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. Process parameters not specifically specified in the following embodiments are generally performed under conventional conditions.

[0029] The endpoints and any values ​​of the ranges disclosed in this invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of the various ranges, the endpoint values ​​of the various ranges and individual point values, and individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this invention.

[0030] According to a first aspect of the present invention, a fiber sand stabilizer for fracturing is provided, comprising the following raw material components: a cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride;

[0031] By weight, the cationic polymer comprises the following raw material components: 18-22 parts of polybutanediol (e.g., 18, 19, 20, 21, or 22 parts), 14-18 parts of isophorone diisocyanate (e.g., 14, 15, 16, 17, or 18 parts), 3-5 parts of N-methyldiethanolamine (e.g., 3, 4, or 5 parts), 1-3 parts of acetic acid (e.g., 1, 2, or 3 parts), and 56-60 parts of water (e.g., 56, 57, 58, 59, or 60 parts).

[0032] The cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride are in a weight ratio of 5:2:1.

[0033] The fiber-based sand stabilizer for fracturing provided in this invention is a long-chain, branched cationic polymer. After naturally unfolding in aqueous solution due to electrical effects, it can adsorb onto the surface of the negatively charged proppant, increasing its surface potential. This causes the dispersed proppant to bridge together and form mutually attractive particle aggregates, thereby increasing the critical flow rate of the proppant. This improves the problems of poor fiber-based sand control stability and low sand-fixing efficiency, and plays a more effective role in carrying sand and preventing proppant backflow.

[0034] The weight portions described in this invention mainly include the disclosed numerical range, any value (including integers and decimals) within the disclosed range, or an interval between any two values, or multiple discontinuous intervals. It also includes values ​​or numerical ranges whose effects are expected to be similar to the endpoints of the numerical range, such as 5-10 parts. This does not only include 5, 6, 7, 8, 9, 10 parts, or any interval between any two parts. Other numerical ranges, not listed individually, are all included in this invention. Therefore, this invention also includes sub-ranges of any directly disclosed numerical range or any specific value within that range.

[0035] To further optimize the effect of fiber sand control stabilizer for fracturing, this invention studied the influence of different proportions of various components on its effect, and obtained a better component proportion as follows: by weight, the cationic polymer includes the following raw material components: 20 parts of polybutanediol, 16 parts of isophorone diisocyanate, 4 parts of N-methyldiethanolamine, 2 parts of acetic acid, and 58 parts of water.

[0036] According to a second aspect of the present invention, a method for preparing the above-mentioned fiber-reinforced sand stabilizer for fracturing is provided, comprising the following steps:

[0037] S1, polybutanediol and isophorone diisocyanate undergo a polycondensation reaction to obtain a prepolymer;

[0038] S2. The prepolymer obtained in step S1 is subjected to an addition polymerization reaction with N-methyldiethanolamine to obtain a high molecular polymer.

[0039] S3. Acetic acid is added to the polymer obtained in step S2 to carry out a neutralization reaction; after the reaction is completed, water is added and emulsified to obtain a cationic polymer.

[0040] S4. The cationic polymer, hexadecyltrimethylammonium bromide and hexadecylpyridine chloride are stirred and mixed evenly in proportion to obtain the fiber sand control stabilizer for fracturing.

[0041] During the reaction, the isocyanate functional group (-NCO) in the isophorone diisocyanate molecule reacts with the hydroxyl group (-OH) of polybutanediol to form a polyurethane segment prepolymer containing NCO end groups. N-methyldiethanolamine, as a chain extender, contains two hydroxyl groups (-OH) in its molecule, which can react with the isocyanate groups (-NCO) in the polyurethane prepolymer generated in the first step to form urethane bonds (-NHCOO-). This step further increases the molecular chain and molecular weight, while introducing nitrogen-containing groups into the molecular chain. Then, a neutralization reaction is carried out with acetic acid to convert the tertiary amine groups in the polyurethane prepolymer into cationic groups, thereby obtaining cationic waterborne polyurethane. Cetyltrimethylammonium bromide and cetylpyridine chloride are both surfactants, which work synergistically with the cationic polymer to stabilize the fibers and act as a support.

[0042] In the above preparation method, as a preferred embodiment, polybutanediol and isophorone diisocyanate are placed in a vacuum drying oven and dried at 105°C for 3 hours before polycondensation reaction.

[0043] In the above preparation method, as a preferred embodiment, in step S1, the polycondensation reaction conditions are: reaction temperature 70-75°C; reaction time 1-1.2 h;

[0044] Alternatively, the polycondensation reaction can be carried out under dry nitrogen protection conditions.

[0045] In the above preparation method, as a preferred embodiment, in step S2, the addition polymerization reaction conditions are: stirring at 75-80°C for 1-1.2 h;

[0046] Optionally, after the temperature of the prepolymer obtained in step S1 is lowered to 75-77°C, N-methyldiethanolamine is added to carry out an addition polymerization reaction.

[0047] In the above preparation method, as a preferred embodiment, in step S3, after cooling the polymer obtained in step S2 to 45°C, acetic acid is added while stirring to carry out a neutralization reaction;

[0048] Optionally, in step S3, water is added and emulsified for 30–35 minutes.

[0049] According to a third aspect of the present invention, a fracturing fluid system is provided, comprising the above-described fiber sand control stabilizer for fracturing and the fiber sand control stabilizer for fracturing prepared by the above-described preparation method.

[0050] In the aforementioned fracturing fluid system, as a preferred embodiment, the raw material components, by weight, include the following: 0.1-0.2 parts of fiber-based sand stabilizer for fracturing, 1.8-2 parts of low-molecular-weight thickener emulsion for fracturing, 0.1-0.2 parts of breaker, 0.1-0.2 parts of fiber, and the remainder being water, with a total weight of 100 parts. It should be noted that the low-molecular-weight thickener emulsion, breaker, and fiber are all conventional components for preparing fiber-based sand stabilizer fracturing fluids, and will not be elaborated further here.

[0051] In the above-mentioned fracturing fluid system, as a preferred embodiment, the fracturing fluid system is prepared as follows: the low molecular weight thickener emulsion and the breaker are added to water while stirring, mixed and allowed to stand, and then the fiber and the fiber sand control stabilizer for fracturing are added and stirred for 15-20 minutes to disperse them evenly, thus obtaining the fracturing fluid system.

[0052] The present invention will now be described in detail with reference to embodiments thereof. These examples are provided by way of explanation and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from its scope or spirit. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0053] In the embodiments of the present invention, unless otherwise specified, the experimental methods used are conventional methods, and the materials and reagents used are commercially available unless otherwise specified.

[0054] Example 1

[0055] S1. Place 40.0g of polybutanediol and 32.1g of isophorone diisocyanate in a vacuum drying oven and dry at 105℃ for 3h.

[0056] S2: Add polybutanediol and isophorone diisocyanate to a flask in proportion, heat to 75°C and react for 1 hour under nitrogen protection, add an appropriate amount of acetone to adjust the viscosity, then add 7.8g of N-methyldiethanolamine, and stir the reaction mixture at 80°C for 1 hour.

[0057] S3: Cool the mixture to 45°C, and add 4 mL of acetic acid while stirring;

[0058] S4: The neutralized prepolymer was emulsified with 117.0g of distilled water under high-speed stirring, reacted for 30min, and the acetone in the system was removed by vacuum distillation to obtain the cationic polymer;

[0059] S5: The above-mentioned cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride are stirred and mixed evenly in a ratio of 5:2:1 to obtain the fiber sand control stabilizer for fracturing in this embodiment.

[0060] Example 2

[0061] S1: Place 40.2g of polybutanediol and 32.3g of isophorone diisocyanate in a vacuum drying oven and dry at 105℃ for 3h;

[0062] S2: Add polybutanediol and isophorone diisocyanate to a flask in proportion, heat to 75°C and react for 1 hour under nitrogen protection, add an appropriate amount of acetone to adjust the viscosity, then add 7.7g of N-methyldiethanolamine, and stir the reaction mixture at 80°C for 1 hour.

[0063] S3: Cool the mixture to 45°C, and add 4 mL of acetic acid while stirring;

[0064] S4: The neutralized prepolymer was emulsified with 116.8g of distilled water under high-speed stirring, reacted for 30min, and the acetone in the system was removed by vacuum distillation to obtain the cationic polymer;

[0065] S5: The above-mentioned cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride are stirred and mixed evenly in a ratio of 5:2:1 to obtain the fiber sand control stabilizer for fracturing in this embodiment.

[0066] Example 3

[0067] S1: Place 40.1g of polybutanediol and 32.0g of isophorone diisocyanate in a vacuum drying oven and dry at 105℃ for 3h;

[0068] S2. Add polybutanediol and isophorone diisocyanate to a flask in proportion, heat to 75°C and react for 1 hour under nitrogen protection, add an appropriate amount of acetone to adjust the viscosity, and then add 7.8g of N-methyldiethanolamine. Stir the reaction mixture at 80°C for 1 hour.

[0069] S3: Cool the mixture to 45°C, and add 4 mL of acetic acid while stirring;

[0070] S4: The neutralized prepolymer was emulsified with 116.9g of distilled water under high-speed stirring, reacted for 30min, and the acetone in the system was removed by vacuum distillation to obtain the cationic polymer;

[0071] S5: The above-mentioned cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride are stirred and mixed evenly in a ratio of 5:2:1 to obtain the fiber sand control stabilizer for fracturing in this embodiment.

[0072] Example 4

[0073] S1: Place 80.0g of polybutanediol and 64.3g of isophorone diisocyanate in a vacuum drying oven and dry at 105℃ for 3h;

[0074] S2: Add polybutanediol and isophorone diisocyanate to a flask in proportion, heat to 75°C for 1 hour under nitrogen protection, add an appropriate amount of acetone to adjust the viscosity, and then add 15.8g of N-methyldiethanolamine. Stir the reaction mixture at 80°C for 1 hour.

[0075] S3: Cool the mixture to 45°C, and add 8 mL of acetic acid while stirring;

[0076] S4: The neutralized prepolymer was emulsified with 234g of distilled water under high-speed stirring, reacted for 30min, and the acetone in the system was removed by vacuum distillation to obtain the cationic polymer.

[0077] S5: The above-mentioned cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride are stirred and mixed evenly in a ratio of 5:2:1 to obtain the fiber sand control stabilizer for fracturing in this embodiment.

[0078] Test case

[0079] The performance of the fiber-reinforced sand stabilizers for fracturing prepared in Examples 1-4 was tested:

[0080] ① Preparation of fracturing fluid system:

[0081] While stirring, add the low-molecular-weight thickener emulsion and breaker to the water according to the formula. After mixing, let it stand. Then, weigh out an appropriate amount of fiber and fiber-based sand control stabilizer for fracturing and add it to the low-molecular-weight thickener emulsion system. Stir for 15 minutes to disperse it evenly, thus obtaining the fiber-based sand control fracturing fluid system. The above fracturing fluid system formula is 1.9 parts of low-molecular-weight thickener emulsion for fracturing (DBFR-CH3 Dongfang Baolin Technology Development (Beijing) Co., Ltd.), 0.1 parts of breaker (ammonium persulfate), 0.2 parts of fiber, 0.1 parts of stabilizer, and the balance being water.

[0082] ② Test Method: 16 parts of ceramsite were added to the fracturing fluid system to be tested, stirred evenly, and then poured into a 100mL graduated cylinder. The mixture was allowed to stand at room temperature for 30 minutes, and the settling height of the ceramsite was observed. Using a sand fixation evaluation device, the parameters were set as follows: upper and lower closure pressure 2.5MPa, displacement pressure 0.3MPa, and displacement fluid (water) 19L. After water flooding, the ceramsite was collected, dried, and weighed. The test results are shown in Table 1.

[0083] Table 1

[0084] Settlement height / cm Ceramsite weight / g Example 1 4.48 43.4 Example 2 4.76 41.3 Example 3 4.62 44.8 Example 4 4.34 39.9 Stabilizer-free 6.44 79.8

[0085] As shown in Table 1, without the introduction of a stabilizer and only by adding fibers, the settling height increased significantly, accompanied by a large loss of ceramsite under hydraulic action. This reflects that relying solely on the fibers for sand control is not satisfactory in terms of sand suspension and sand control effects. However, when the fiber-based sand control stabilizer prepared in the example was added, both the settling height and the number of ceramsite captured by hydraulic drive showed a significant decreasing trend. The above results indicate that the stabilizer prepared in this invention can, to a certain extent, assist the sand control fibers in achieving a better effect.

[0086] The foregoing has described and evaluated some embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. This does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, still fall within the protection scope of the present invention.

Claims

1. A fiber-reinforced sand stabilizer for fracturing, characterized in that, It contains the following raw material components: cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride; By weight, the cationic polymer comprises the following raw material components: 18-22 parts of polybutanediol, 14-18 parts of isophorone diisocyanate, 3-5 parts of N-methyldiethanolamine, 1-3 parts of acetic acid, and 56-60 parts of water. The cationic polymer, hexadecyltrimethylammonium bromide, and hexadecylpyridine chloride are in a weight ratio of 5:2:

1.

2. The fiber-reinforced sand stabilizer for fracturing according to claim 1, characterized in that, By weight, the cationic polymer comprises the following raw material components: 20 parts polybutanediol, 16 parts isophorone diisocyanate, 4 parts N-methyldiethanolamine, 2 parts acetic acid, and 58 parts water.

3. A method for preparing a fiber-reinforced sand stabilizer for fracturing as described in claim 1 or 2, characterized in that, Includes the following steps: S1, polybutanediol and isophorone diisocyanate undergo a polycondensation reaction to obtain a prepolymer; S2. The prepolymer obtained in step S1 is subjected to an addition polymerization reaction with N-methyldiethanolamine to obtain a high molecular polymer. S3. Acetic acid is added to the polymer obtained in step S2 to carry out a neutralization reaction; after the reaction is completed, water is added and emulsified to obtain a cationic polymer. S4. The cationic polymer, hexadecyltrimethylammonium bromide and hexadecylpyridine chloride are stirred and mixed evenly in proportion to obtain the fiber sand control stabilizer for fracturing.

4. The preparation method according to claim 3, characterized in that, Polybutane glycol and isophorone diisocyanate were placed in a vacuum drying oven and dried at 105°C for 3 hours before polycondensation reaction was carried out.

5. The preparation method according to claim 3, characterized in that, In step S1, the polycondensation reaction conditions are: reaction temperature 70-75℃; reaction time 1-1.2h; And / or, the polycondensation reaction is carried out under dry nitrogen protection conditions.

6. The preparation method according to claim 3, characterized in that, In step S2, the addition polymerization reaction conditions are: stirring at 75-80°C for 1-1.2 hours.

7. The preparation method according to claim 3, characterized in that, In step S3, after cooling the polymer obtained in step S2 to 45°C, acetic acid is added while stirring to carry out a neutralization reaction. And / or, in step S3, add water and emulsify for 30–35 minutes.

8. A fracturing fluid system, characterized in that, Includes the fiber-reinforced sand stabilizer for fracturing as described in claim 1 or 2, and the fiber-reinforced sand stabilizer for fracturing prepared by the preparation method described in any one of claims 4 to 7.

9. The fracturing fluid system according to claim 8, characterized in that, The raw material components, by weight, include the following: 0.1-0.2 parts of fiber sand stabilizer for fracturing, 1.8-2 parts of low molecular weight thickener emulsion for fracturing, 0.1-0.2 parts of breaker, 0.1-0.2 parts of fiber, and the remainder is water, with the total weight of the raw material components being 100 parts.

10. The fracturing fluid system according to claim 8 or 9, characterized in that, The fracturing fluid system is prepared as follows: the low molecular weight thickener emulsion and breaker for fracturing are added to water while stirring, mixed and allowed to stand, and then the fiber and the fiber sand stabilizer for fracturing are added and stirred for 15-20 minutes to disperse them evenly, thus obtaining the fracturing fluid system.