A corrosion and scale inhibition type guar gum fracturing fluid system and preparation method thereof

Abstract

The present invention relates to the technical field of fracturing fluids, and proposes a corrosion and scale inhibition type guar gum fracturing fluid system and a preparation method thereof. The guar gum fracturing fluid system is composed of the following components in weight percentage: guar gum 0.33% to 0.42%, surfactant 0.05% to 0.1%, drag reducer 0.05% to 0.08%, corrosion and scale inhibitor 0.2% to 0.3%, ammonium chloride 0.8% to 1.4%, cross-linking agent 0.12% to 0.30%, gel breaker 0.02% to 0.03%, and the balance is water. Through the above technical scheme, the problem of poor corrosion inhibition effect and poor scale inhibition effect of the guar gum fracturing fluid system in the related art is solved.

Description

Technical Field

[0001] The invention relates to the technical field of fracturing fluids, and in particular to a corrosion and scale inhibition type guar gum fracturing fluid system and a preparation method thereof. Background Art

[0002] Fracturing fluid system is a special working fluid used for hydraulic fracturing operations during the exploitation of oil and gas fields. It is a complex fluid mixed with a variety of chemical additives and base liquids in a specific proportion. It is designed to be injected into the wellbore at high pressure and press the formation rock to form artificial fractures, thereby increasing the production and recovery rate of oil and gas wells. Guar gum fracturing fluid system is a water-based fracturing fluid system prepared by mixing guar gum and its derivatives as the main thickener and other additives. Guar gum is a natural high molecular polymer with a large number of active groups such as hydroxyl and ether bonds on its molecular chain. It can dissolve in water and form a viscous solution, providing basic viscosity and sand carrying capacity for fracturing fluid. However, with the in-depth development of shale reservoirs, there are usually a large number of scale-forming ions in the formation water downhole, such as calcium, magnesium, carbonate ions, etc. These ions will not only corrode downhole operating tools, but also easily form precipitation with other substances. The scale inhibition rate of the current guar gum fracturing fluid system is poor, and it is easy to combine with these ions to form scaling, affecting the fracturing effect, and the corrosion inhibition rate needs to be improved.

[0003] Therefore, developing a guar gum fracturing fluid system with good corrosion and scale inhibition effects is of great significance for stabilizing shale reservoirs and improving downhole mining efficiency. Summary of the invention

[0004] The present invention provides a corrosion and scale inhibition type guar gum fracturing fluid system, which solves the problem of poor corrosion inhibition effect and poor scale inhibition effect of the guar gum fracturing fluid system in the related art.

[0005] The technical solution of the present invention is as follows: The present invention provides a corrosion and scale inhibition type guar gum fracturing fluid system, which is composed of the following components in percentage by weight: Guar gum 0.33%~0.42%, surfactant 0.05%~0.1%, drag reducer 0.05%~0.08%, corrosion inhibitor 0.2%~0.3%, ammonium chloride 0.8%~1.4%, cross-linking agent 0.12%~0.30%, gel breaker 0.02%~0.03%, the balance is water; The corrosion and scale inhibitor comprises the following components in parts by weight: 20-30 parts of aminotrimethylenephosphonic acid, 8-12 parts of sodium ethylenediaminetetramethylenephosphonate, 4-8 parts of sodium polyepoxysuccinate, 2-6 parts of bis(dimethylaminoethyl)ether, 6-14 parts of sodium ferric diethylenetriaminepentaacetate, 1-9 parts of ammonium ferric citrate, 10-18 parts of hydroxyapatite, and 100 parts of water.

[0006] As a further technical solution, the weight ratio of the sodium ferric diethylenetriamine pentaacetate and ammonium ferric citrate is 2-4:1.

[0007] When the weight ratio of sodium ferric diethylenetriamine pentaacetate to ammonium ferric citrate is 2-4:1, the corrosion inhibition effect and scale inhibition effect of the guar gum fracturing fluid system can be further improved.

[0008] As a further technical solution, the hydroxyapatite is modified hydroxyapatite, and the modified hydroxyapatite is obtained by modifying hydroxyapatite with a modifier, and the modifier includes dihydroxyaminoacetic acid aluminum.

[0009] When the modifier is dihydroxyaminoaluminum acetate, the hydroxyapatite is modified by dihydroxyaminoaluminum acetate, so that the hydroxyapatite can be more stably present in the guar gum fracturing fluid system, so that it can better interact with the ions in the system, inhibit the precipitation of the ions, and reduce the corrosion caused by the ions, thereby further improving the corrosion inhibition and scale inhibition effects of the guar gum fracturing fluid system.

[0010] As a further technical solution, the weight ratio of the hydroxyapatite to the modifier is 30:1-6.

[0011] When the weight ratio of hydroxyapatite to modifier is 30:1-6, the corrosion inhibition and scale inhibition effects of the guar gum fracturing fluid system can be further improved.

[0012] As a further technical solution, the preparation method of the modified hydroxyapatite comprises the following steps: A1, mixing the hydroxyapatite and the silane coupling agent evenly, and drying to obtain pretreated hydroxyapatite; A2. Add an emulsifier, the pretreated hydroxyapatite and the modifier into water, disperse them evenly, and dry them to obtain modified hydroxyapatite.

[0013] As a further technical solution, the weight ratio of the hydroxyapatite to the silane coupling agent is 15:2~2.5; The weight ratio of the modifier to the emulsifier is 2:1.

[0014] As a further technical solution, the silane coupling agent is one or more of γ-mercaptopropyltriethylsilane, 3-aminopropyltrimethoxysilane, and γ-glycidyloxypropyltrimethoxysilane.

[0015] As a further technical solution, the emulsifier is one or two of Tween-80 and polyoxyethylene monostearate.

[0016] As a further technical solution, the modifier also includes vinyl bisstearamide.

[0017] When the modifier also includes vinyl bisstearamide, the hydroxyapatite is modified together with dihydroxyaminoacetic acid aluminum and vinyl bisstearamide, which can improve the dispersibility of hydroxyapatite in the guar fracturing fluid system, so that it can better combine with the ions in the system and with other components in the corrosion and scale inhibitor, thereby further improving the stability of the corrosion and scale inhibitor, and further improving the corrosion inhibition and scale inhibition effects of the guar fracturing fluid system.

[0018] As a further technical solution, the weight ratio of the dihydroxyamino aluminum acetate to the vinyl bisstearamide is 1~4:2.

[0019] When the weight ratio of dihydroxyaminoacetic acid aluminum to vinyl bisstearamide is 1-4:2, the corrosion inhibition effect and scale inhibition effect of the guar gum fracturing fluid system can be further improved.

[0020] As a further technical solution, the guar gum is hydroxypropyl guar gum; the surfactant is one or more of sodium dodecylbenzene sulfonate, sodium dioctyl sulfosuccinate, and sodium lauryl polyoxyethylene ether sulfate; the drag reducer is one or two of polyvinyl alcohol and polyvinyl pyrrolidone; the cross-linking agent is one or more of sodium tetraborate, organic boron cross-linking agent, and organic titanium cross-linking agent; the breaker is one or two of sodium persulfate and sodium sulfite.

[0021] The present invention also proposes a method for preparing the corrosion and scale inhibition type guar gum fracturing fluid system, comprising the following steps: S1. uniformly mixing the components of the corrosion and scale inhibitor in parts by weight to obtain the corrosion and scale inhibitor; S2, mixing the guar gum, surfactant, drag reducer, corrosion inhibitor, scale inhibitor, ammonium chloride and water uniformly to obtain a base liquid; S3, adding the cross-linking agent and the breaker into the base fluid, stirring until a gel is formed, and obtaining the guar gum fracturing fluid system.

[0022] As a further technical solution, in step S1, when the mixing is uniform, the temperature is 60~70°C, the time is 1~2h, and the stirring speed is 300~600r / min; in step S2, when the mixing is uniform, the temperature is 20~30°C, the time is 20~30min, and the stirring speed is 500~700r / min; in step S3, when the stirring is performed to form a jelly, the temperature is 20~30°C, and the stirring speed is adjusted until the formed vortex can be seen at the top of the central axis of the stirring blade, and the stirring is stopped when the vortex disappears and the liquid level bulges.

[0023] The working principle and beneficial effects of the present invention are: In the present invention, sodium ferric diethylenetriamine pentaacetate and ammonium ferric citrate are added to the corrosion inhibitor and scale inhibitor, and the sodium ferric diethylenetriamine pentaacetate and ammonium ferric citrate have a synergistic effect. Through the compound use of sodium ferric diethylenetriamine pentaacetate and ammonium ferric citrate, the prepared corrosion inhibitor and scale inhibitor can be effectively combined with ions in formation water, which can reduce ion precipitation and corrosion caused by ions, and finally enable the prepared guar gum fracturing fluid system to exert good corrosion inhibition and scale inhibition effects. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the following embodiments and comparative examples, guar gum is hydroxypropyl guar gum, model KLGJ-9, purchased from Hubei Xinghengye Technology Co., Ltd.; the surfactant is sodium dioctyl sulfosuccinate; the model of sodium polyepoxysuccinate is Lvnon404, purchased from Dezhou Green Energy Water Treatment Technology Co., Ltd.; the drag reducer is polyvinyl pyrrolidone, model K30; the silane coupling agent is γ-mercaptopropyltriethylsilane; the emulsifier is Tween-80, model S-80; the cross-linking agent is sodium tetraborate; and the gel breaker is sodium persulfate.

[0026] Example 1 A corrosion and scale inhibition type guar gum fracturing fluid system, comprising the following components in percentage by weight: Guar gum 0.33%, dioctyl sodium sulfosuccinate 0.05%, polyvinyl pyrrolidone 0.05%, corrosion inhibitor 0.2%, ammonium chloride 0.8%, sodium tetraborate 0.12%, sodium persulfate 0.02%, the balance is water; The corrosion and scale inhibitor comprises the following components in parts by weight: 20 parts of aminotrimethylenephosphonic acid, 8 parts of sodium ethylenediaminetetramethylenephosphonate, 4 parts of sodium polyepoxysuccinate, 2 parts of bis(dimethylaminoethyl)ether, 6 parts of sodium ferric diethylenetriaminepentaacetate, 1 part of ammonium ferric citrate, 10 parts of hydroxyapatite, 100 parts of water; The preparation method of the corrosion and scale inhibition type guar gum fracturing fluid system comprises the following steps: S1. Stir the above-mentioned components of the corrosion and scale inhibitor in parts by weight at 60° C. at a stirring speed of 300 r / min for 2 h, and after mixing evenly, obtain the corrosion and scale inhibitor; S2, stirring guar gum, sodium dioctyl sulfosuccinate, polyvinyl pyrrolidone, corrosion inhibitor, ammonium chloride and water at 20° C. at a stirring speed of 500 r / min for 30 min, and mixing them evenly to obtain a base liquid; S3. Sodium tetraborate and sodium persulfate are added to the base fluid, and the stirring speed is adjusted at 20° C. until the formed vortex is visible at the top of the central axis of the stirring blade. When the vortex disappears and the liquid surface bulges, the stirring is stopped to form a gel, thereby obtaining the guar gel fracturing fluid system.

[0027] Example 2 A corrosion and scale inhibition type guar gum fracturing fluid system, comprising the following components in percentage by weight: Guar gum 0.37%, dioctyl sodium sulfosuccinate 0.08%, polyvinyl pyrrolidone 0.07%, corrosion inhibitor 0.25%, ammonium chloride 1.1%, sodium tetraborate 0.21%, sodium persulfate 0.025%, the balance is water; The corrosion and scale inhibitor comprises the following components in parts by weight: 25 parts of aminotrimethylenephosphonic acid, 10 parts of sodium ethylenediaminetetramethylenephosphonate, 6 parts of sodium polyepoxysuccinate, 4 parts of bis(dimethylaminoethyl)ether, 8 parts of sodium ferric diethylenetriaminepentaacetate, 7 parts of ammonium ferric citrate, 15 parts of hydroxyapatite, 100 parts of water; A method for preparing a corrosion and scale inhibition type guar gum fracturing fluid system comprises the following steps: S1. Stir the above-mentioned components of the corrosion and scale inhibitor in parts by weight at 65° C. at a stirring speed of 450 r / min for 1.5 h, and after mixing evenly, obtain the corrosion and scale inhibitor; S2, stirring guar gum, sodium dioctyl sulfosuccinate, polyvinyl pyrrolidone, corrosion inhibitor, ammonium chloride and water at 25° C. at a stirring speed of 600 r / min for 25 min, and mixing them evenly to obtain a base liquid; S3. Sodium tetraborate and sodium persulfate are added to the base fluid, and the stirring speed is adjusted at 25° C. until the vortex formed is visible at the top of the central axis of the stirring blade. When the vortex disappears and the liquid surface bulges, the stirring is stopped to form a gel, thereby obtaining the guar gel fracturing fluid system.

[0028] Example 3 A corrosion and scale inhibition type guar gum fracturing fluid system, comprising the following components in percentage by weight: Guar gum 0.42%, dioctyl sodium sulfosuccinate 0.1%, polyvinyl pyrrolidone 0.08%, corrosion inhibitor 0.3%, ammonium chloride 1.4%, sodium tetraborate 0.30%, sodium persulfate 0.03%, the balance is water; The corrosion and scale inhibitor comprises the following components in parts by weight: 30 parts of aminotrimethylenephosphonic acid, 12 parts of sodium ethylenediaminetetramethylenephosphonate, 8 parts of sodium polyepoxysuccinate, 6 parts of bis(dimethylaminoethyl)ether, 14 parts of sodium ferric diethylenetriaminepentaacetate, 9 parts of ammonium ferric citrate, 18 parts of hydroxyapatite, 100 parts of water; The preparation method of the corrosion and scale inhibition type guar gum fracturing fluid system comprises the following steps: S1. Stir the above-mentioned components of the corrosion and scale inhibitor in parts by weight at 70° C. at a stirring speed of 600 r / min for 1 h, and after mixing evenly, obtain the corrosion and scale inhibitor; S2, stirring guar gum, sodium dioctyl sulfosuccinate, polyvinyl pyrrolidone, corrosion inhibitor, ammonium chloride and water at 30° C. and a stirring speed of 700 r / min for 20 min, and mixing them evenly to obtain a base liquid; S3. Sodium tetraborate and sodium persulfate are added to the base fluid, and the stirring speed is adjusted at 30° C. until the vortex formed is visible at the top of the central axis of the stirring blade. When the vortex disappears and the liquid surface bulges, the stirring is stopped to form a gel, thereby obtaining the guar gel fracturing fluid system.

[0029] Example 4 The difference between this embodiment and embodiment 2 is that, in this embodiment, 13 parts of sodium ferric diethylenetriamine pentaacetate and 2 parts of ammonium ferric citrate are added.

[0030] Example 5 The difference between this embodiment and embodiment 2 is that, in this embodiment, 10 parts of sodium ferric diethylenetriamine pentaacetate and 5 parts of ammonium ferric citrate are added.

[0031] Example 6 The difference between this embodiment and embodiment 2 is that, in this embodiment, 12 parts of sodium ferric diethylenetriamine pentaacetate and 3 parts of ammonium ferric citrate are added.

[0032] Example 7 The difference between this embodiment and embodiment 6 is that, in this embodiment, the hydroxyapatite is modified hydroxyapatite, and its preparation method comprises the following steps: A1, 30 parts of hydroxyapatite and 4 parts of γ-mercaptopropyltriethylsilane were mixed evenly, and dried to obtain pretreated hydroxyapatite; A2. Add Tween-80, pretreated hydroxyapatite and 0.5 parts of dihydroxyaminoaluminum acetate to 40 parts of water, disperse evenly, and dry to obtain modified hydroxyapatite; wherein the weight ratio of dihydroxyaminoaluminum acetate to Tween-80 is 2:1.

[0033] Example 8 The difference between this embodiment and embodiment 7 is that, in this embodiment, 7 parts of dihydroxyamino aluminum acetate are added.

[0034] Example 9 The difference between this embodiment and embodiment 7 is that, in this embodiment, 1 part of dihydroxyaminoaluminum acetate is added.

[0035] Example 10 The difference between this embodiment and embodiment 7 is that, in this embodiment, 6 parts of dihydroxyamino aluminum acetate are added.

[0036] Embodiment 11 The only difference between this embodiment and embodiment 10 is that, in this embodiment, dihydroxyaminoaluminum acetate is replaced by an equal amount of vinyl bisstearamide.

[0037] Example 12 The only difference between this embodiment and embodiment 10 is that, in this embodiment, 6 parts of dihydroxyamino aluminum acetate are replaced by 1 part of dihydroxyamino aluminum acetate and 5 parts of vinyl bisstearamide.

[0038] Embodiment 13 The only difference between this embodiment and embodiment 12 is that, in this embodiment, 5 parts of dihydroxyaminoaluminum acetate and 1 part of vinyl bisstearamide are added.

[0039] Embodiment 14 The only difference between this embodiment and embodiment 12 is that, in this embodiment, 2 parts of dihydroxyaminoaluminum acetate and 4 parts of vinyl bisstearamide are added.

[0040] Embodiment 15 The only difference between this embodiment and embodiment 12 is that, in this embodiment, 4 parts of dihydroxyaminoaluminum acetate and 2 parts of vinyl bisstearamide are added.

[0041] Comparative Example 1 The difference between this comparative example and Example 1 is that in this comparative example, no ammonium ferric citrate is added, and 7 parts of sodium ferric diethylenetriamine pentaacetate are added.

[0042] Comparative Example 2 The difference between this comparative example and Example 1 is that in this comparative example, no sodium ferric diethylenetriamine pentaacetate is added, and 7 parts of ammonium ferric citrate are added.

[0043] Comparative Example 3 The difference between this comparative example and Example 1 is that in this comparative example, neither ammonium ferric citrate nor sodium ferric diethylenetriamine pentaacetate is added.

[0044] The guar gum fracturing fluid systems prepared in Examples 1 to 15 and Comparative Examples 1 to 3 were subjected to the following performance tests: ① Scale inhibition effect test: The guar gum fracturing fluid system was tested for scale inhibition rate according to the method in GB / T 16632-2019 "Determination of scale inhibition performance of water treatment agents - Calcium carbonate deposition method".

[0045] ②Corrosion inhibition effect test: Take the guar gum fracturing fluid system, add 2% potassium chloride into it, and measure its corrosion inhibition rate using the rotating hanging plate method. The hanging plate material is N80 steel, and the test time is 20 days.

[0046] The test results are shown in Table 1 below: Table 1 Scale inhibition effect test and corrosion inhibition effect test results of Examples 1 to 15 and Comparative Examples 1 to 3

[0047] Compared with comparative examples 1 to 3, the scale inhibition rate and corrosion inhibition rate of Example 1 are significantly improved, indicating that when sodium ferric diethylenetriamine pentaacetate and ammonium ferric citrate are added to the corrosion and scale inhibitor, sodium ferric diethylenetriamine pentaacetate and ammonium ferric citrate have a synergistic effect, which can improve the corrosion inhibition effect and scale inhibition effect of the guar gum fracturing fluid system.

[0048] Compared with Examples 2 and 4, the scale inhibition rate and corrosion inhibition rate of Examples 5-6 are significantly improved, indicating that when the weight ratio of sodium ferric diethylenetriamine pentaacetate and ammonium ferric citrate is 2-4:1, the corrosion inhibition effect and scale inhibition effect of the guar gum fracturing fluid system can be further improved.

[0049] Compared with Example 6, the scale inhibition rate and corrosion inhibition rate of Examples 7 to 10 are improved, indicating that when the modifier is dihydroxyaminoaluminum acetate, the hydroxyapatite is modified by dihydroxyaminoaluminum acetate, so that the hydroxyapatite can be more stably present in the guar fracturing fluid system, thereby better interacting with the ions in the system, inhibiting the precipitation of ions, and reducing the corrosion of ions to metals, thereby further improving the corrosion inhibition effect and scale inhibition effect of the guar fracturing fluid system.

[0050] Compared with Examples 7-8, the scale inhibition rate and corrosion inhibition rate of Examples 9-10 are improved, indicating that when the weight ratio of hydroxyapatite to modifier is 30:1-6, the corrosion inhibition effect and scale inhibition effect of the guar gum fracturing fluid system can be further improved.

[0051] Compared with Examples 10 to 11, the scale inhibition rate and corrosion inhibition rate of Examples 12 to 15 are improved, indicating that when the modifier also includes vinyl bisstearamide, the corrosion inhibition effect and scale inhibition effect of the guar gum fracturing fluid system can be further improved by jointly modifying hydroxyapatite with dihydroxyaminoacetic acid aluminum and vinyl bisstearamide.

[0052] Compared with Examples 12 to 13, the scale inhibition rate and corrosion inhibition rate of Examples 14 to 15 are improved, indicating that when the weight ratio of dihydroxyaminoacetic acid aluminum to vinyl bisstearamide is 1 to 4:2, the corrosion inhibition effect and scale inhibition effect of the guar gum fracturing fluid system can be further improved.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A corrosion and scale inhibition type guar gum fracturing fluid system, characterized in that: It is composed of the following components in weight percentage: Guar gum 0.33%~0.42%, surfactant 0.05%~0.1%, drag reducer 0.05%~0.08%, corrosion inhibitor 0.2%~0.3%, ammonium chloride 0.8%~1.4%, cross-linking agent 0.12%~0.30%, gel breaker 0.02%~0.03%, the balance is water; The corrosion and scale inhibitor comprises the following components in parts by weight: 20-30 parts of aminotrimethylenephosphonic acid, 8-12 parts of sodium ethylenediaminetetramethylenephosphonate, 4-8 parts of sodium polyepoxysuccinate, 2-6 parts of bis(dimethylaminoethyl)ether, 6-14 parts of sodium ferric diethylenetriaminepentaacetate, 1-9 parts of ammonium ferric citrate, 10-18 parts of hydroxyapatite, and 100 parts of water.

2. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 1, characterized in that: The weight ratio of the sodium ferric diethylenetriamine pentaacetate to ammonium ferric citrate is 2-4:

1.

3. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 1, characterized in that: The hydroxyapatite is modified hydroxyapatite, which is obtained by modifying hydroxyapatite with a modifier, and the modifier includes dihydroxyaminoaluminum acetate.

4. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 3, characterized in that: The weight ratio of the hydroxyapatite to the modifier is 30:1-6.

5. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 3, characterized in that: The preparation method of the modified hydroxyapatite comprises the following steps: A1, mixing the hydroxyapatite and the silane coupling agent evenly, and drying to obtain pretreated hydroxyapatite; A2. Add an emulsifier, the pretreated hydroxyapatite and the modifier into water, disperse them evenly, and dry them to obtain modified hydroxyapatite.

6. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 5, characterized in that: The weight ratio of the hydroxyapatite to the silane coupling agent is 15:2-2.5; The weight ratio of the modifier to the emulsifier is 2:

1.

7. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 3, characterized in that: The modifier also includes vinyl bisstearamide.

8. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 7, characterized in that: The weight ratio of the dihydroxyamino aluminum acetate to the vinyl bisstearamide is 1-4:

2.

9. The corrosion and scale inhibition type guar gum fracturing fluid system according to claim 1, characterized in that: The guar gum is hydroxypropyl guar gum; the surfactant is one or more of sodium dodecylbenzene sulfonate, sodium dioctyl sulfosuccinate, and sodium lauryl polyoxyethylene ether sulfate; the drag reducer is one or two of polyvinyl alcohol and polyvinyl pyrrolidone; the cross-linking agent is one or more of sodium tetraborate, organic boron cross-linking agent, and organic titanium cross-linking agent; the breaker is one or two of sodium persulfate and sodium sulfite.

10. The method for preparing a corrosion and scale inhibition type guar gum fracturing fluid system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. uniformly mixing the components of the corrosion and scale inhibitor in parts by weight to obtain the corrosion and scale inhibitor; S2, mixing the guar gum, surfactant, drag reducer, corrosion inhibitor, scale inhibitor, ammonium chloride and water uniformly to obtain a base liquid; S3, adding the cross-linking agent and the breaker into the base fluid, stirring until a gel is formed, and obtaining the guar gum fracturing fluid system.

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