Drilling fluid composition as well as preparation method and application thereof

Abstract

The invention provides a drilling fluid composition as well as a preparation method and application thereof. The drilling fluid composition is prepared from the following raw materials: an inhibitor, a tackifier, a filtrate reducer and a lubricant, the mass ratio of the inhibitor to the tackifier to the filtrate reducer to the lubricant is (0.5-5): (0.1-1): (2-12): (0.5-5); the inhibitor comprises an organic silicon-aluminum composite component, polyethylene glycol and an ethylene-propylene copolymer. The treated bentonite aluminum extraction residues are added, active silicon dioxide in the residues generates active silicon salt, the active silicon salt and clay minerals are cemented, and mineral particles such as clay are coagulated into a firm whole, so that shale is sealed, the mechanical strength of the prepared composition in use is improved, the durability of drilling fluid in the use process is improved, and the service life of the drilling fluid is prolonged. And the raw material in the lubricant adopts the soybean oil which is relatively easy to obtain, so that the production cost of the composition is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of drilling fluid, and in particular relates to a drilling fluid composition and a preparation method and application thereof. Background Art

[0002] Drilling fluid is a working fluid that can carry drill cuttings, cool and lubricate the drill bit, balance formation pressure, protect the well wall stability and protect the oil layer from damage during the drilling process. Its performance directly affects drilling efficiency, downhole safety and cost control, and is an important part of drilling engineering technology. Drilling fluid lubricant is an important drilling fluid chemical treatment agent. Its function is to improve the lubricity of drilling fluid, reduce the friction between the well wall and the drill bit, reduce the rotation torque of the drill string and the resistance of drilling, thereby reducing the occurrence of drill sticking accidents.

[0003] However, during the preparation of common drilling fluids, more environmentally harmful substances are added to the lubricating oil part, making it more harmful to the environment when used. Summary of the invention

[0004] In order to solve the above problems in the prior art, the present invention provides a drilling fluid composition and a preparation method and application thereof.

[0005] In a first aspect, the present invention provides a drilling fluid composition, wherein the raw materials for preparing the drilling fluid composition include: an inhibitor, a viscosity enhancer, a fluid loss reducer and a lubricant; the mass ratio of the inhibitor, the viscosity enhancer, the fluid loss reducer and the lubricant is (0.5-5): (0.1-1): (2-12): (0.5-5);

[0006] The inhibitor is one of an organic silicon aluminum composite component, polyethylene glycol and an ethylene-propylene copolymer;

[0007] As a specific embodiment of the present invention, the organic silicon aluminum composite component includes: 100-120 parts of AlCl3 solution, 100-120 parts of diethoxydimethylsilane solution, 150-180 parts of γ-aminopropyldiethoxymethylsilane solution, 80-100 parts of NaOH solution and 110-120 parts of bentonite aluminum extraction residue.

[0008] Among them, the concentration of AlCl3 solution is 1.3-1.8mol / L, the concentration of diethoxydimethylsilane solution is 1.3-1.8mol / L, the concentration of γ-aminopropyldiethoxymethylsilane solution is 1.3-1.8mol / L, and the concentration of NaOH solution is 0.7-0.9mol / L; preferably, the concentration of AlCl3 solution is 1.5mol / L, the concentration of diethoxydimethylsilane solution is 1.5mol / L, the concentration of γ-aminopropyldiethoxymethylsilane solution is 1.5mol / L, and the concentration of NaOH solution is 0.8mol / L.

[0009] As a specific embodiment of the present invention, the viscosity enhancer component includes: 20-50 parts of modified organic soil, 20-40 parts of modified vegetable gum, 10-30 parts of unsaturated amino acid ester, 20-50 parts of methyl sulfonic acid, 50-100 parts of polyethylene glycol, 30-50 parts of hydroxymethyl cellulose, 10-30 parts of quaternary ammonium salt, 5-15 parts of emulsifier, 30-60 parts of base oil, and 0.5-1.5 parts of initiator.

[0010] As a specific embodiment of the present invention, the unsaturated amino acid ester is at least one of diethylaminoethyl methacrylate, N,N-diethylaminoethyl acrylate, and dimethylaminoethyl methacrylate.

[0011] As a specific embodiment of the present invention, the quaternary ammonium salt is methacryloyloxyethyl trimethylammonium chloride.

[0012] As a specific embodiment of the present invention, the base oil is diesel or white oil.

[0013] As a specific embodiment of the present invention, the emulsifier is at least one of calcium sulfonate, sodium secondary alkyl sulfonate, sodium polyacrylate, calcium oleate, and sodium dicyclohexyl sulfosuccinate.

[0014] As a specific embodiment of the present invention, the initiator is a mixture of ammonium persulfate and sodium sulfite, wherein the mass ratio of ammonium persulfate to sodium sulfite is 1:(1-4), preferably, the mass ratio of ammonium persulfate to sodium sulfite is 1:2.

[0015] As a specific embodiment of the present invention, the modified organic soil is bentonite that has been activated and modified; the activation and modification comprises soaking the aluminum extraction residue of bentonite in a 2 mol / L NaOH solution for 7 hours; and / or

[0016] As a specific embodiment of the present invention, the modified vegetable gum is hydroxypropyl guar gum.

[0017] As a specific embodiment of the present invention, the lubricant component includes 70-90 parts of vegetable oil, 10-30 parts of methanol and 20-50 parts of fine flake graphite particles.

[0018] As a specific embodiment of the present invention, the vegetable oil is selected from at least one of soybean oil, peanut oil or rapeseed oil.

[0019] As a specific embodiment of the present invention, the fluid loss reducer is selected from at least one of sulfomethyl lignite (SMC), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), modified starch and carboxymethyl cellulose; wherein the modified starch includes carboxymethyl starch, hydroxyethyl starch and hydroxypropyl starch.

[0020] As a specific embodiment of the present invention, the particle size of the fine flake graphite particles is 110-150 meshes.

[0021] In a second aspect, the present invention provides a method for preparing the drilling fluid composition according to the first aspect, comprising the following steps:

[0022] S1: mixing AlCl3 solution, diethoxydimethylsilane solution, γ-aminopropyldiethoxymethylsilane solution, NaOH solution and bentonite aluminum extraction residue to obtain an organic silicon-aluminum composite component;

[0023] S2: adding polyethylene glycol and ethylene-propylene copolymer to the organosilicon-aluminum composite component obtained in step S1 to obtain an inhibitor;

[0024] S3: dissolving methanesulfonic acid and an emulsifier in deionized water to obtain an emulsion;

[0025] S4: adding modified organic soil, modified vegetable gum, unsaturated amino acid ester, hydroxymethyl cellulose and quaternary ammonium salt to the emulsion obtained in step S3, and then adding initiator to react, and after the reaction, adding base oil, and mixing evenly to obtain a tackifier;

[0026] S5: heating and mixing soybean oil, methanol and fine flake graphite particles, and cooling to obtain a lubricant;

[0027] S6: the inhibitor obtained in step S2, the viscosity enhancer obtained in step S4, the lubricant obtained in step S5, and the fluid loss reducer are uniformly mixed to obtain a drilling fluid composition.

[0028] As a specific embodiment of the present invention, in step S1, the mixing conditions include: a stirring rate of 200-500 rpm and a stirring time of 20-30 min.

[0029] As a specific embodiment of the present invention, in step S2, the mixing conditions include: a stirring rate of 200-500 rpm and a stirring time of 20-30 min.

[0030] As a specific embodiment of the present invention, in step S3, the emulsification conditions include: a stirring rate of 4000 to 5000 rpm and a stirring time of 20 to 30 min.

[0031] As a specific embodiment of the present invention, in step S4, the reaction conditions for adding the initiator include: a temperature of 75-78° C. and a reaction time of 4-6 hours.

[0032] As a specific embodiment of the present invention, in step S5, the heating temperature is 100-110° C.; the mixing conditions include: a stirring rate of 200-500 rpm, and a stirring time of 3-4 hours.

[0033] As a specific embodiment of the present invention, in step S6, the mixing conditions include: a stirring rate of 200-500 rpm and a stirring time of 10-60 min.

[0034] In a third aspect, the present invention provides the use of the drilling fluid composition described in the first aspect or the drilling fluid composition prepared by the preparation method described in the second aspect in the field of water-based drilling fluid.

[0035] The above raw materials in the present invention can be prepared in-house or commercially available, and the present invention is not particularly limited thereto.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The drilling fluid composition of the present invention is added with the bentonite aluminum extraction residue that has been activated. The active silicon dioxide therein generates active silicon salt and undergoes a cementing effect with clay minerals, etc., so that the clay and other mineral particles are condensed into a solid whole, thereby sealing the shale, improving the mechanical strength of the prepared composition when in use, and increasing the durability of the drilling fluid during use.

[0038] 2. The drilling fluid composition of the present invention uses soybean oil, which is relatively easy to obtain, as the raw material of the lubricant, which greatly reduces the cost of the composition during production, makes the composition easily biodegradable and less polluting to the environment, and is more environmentally friendly. Fine flake graphite particles are added to the lubricant, so that the thermal conductivity of the prepared composition is improved during use, thereby reducing the temperature of the drill bit and increasing the service life of the drill bit. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with specific embodiments, but they do not constitute any limitation to the present invention.

[0040] The reagent information used in each embodiment of the present invention is as follows:

[0041] The concentration of AlCl3 solution is 1.5 mol / L;

[0042] The concentration of diethoxydimethylsilane solution was 1.5 mol / L;

[0043] The concentration of γ-aminopropyldiethoxymethylsilane solution is 1.5 mol / L;

[0044] The concentration of NaOH solution is 0.8 mol / L;

[0045] The average particle size of fine flake graphite particles is 120 mesh;

[0046] The initiator is a mixture of ammonium persulfate and sodium sulfite in a mass ratio of 1:2.

[0047] The modified organic soil is prepared by immersing the aluminum-extracted residue of bentonite in a 2 mol / L NaOH solution for 7 hours.

[0048] The parts used in the embodiments of the present invention are all parts by mass.

[0049] Example 1

[0050] This embodiment provides a drilling fluid composition and a preparation method thereof, the specific details of which are as follows:

[0051] S1: 100 parts of AlCl3 solution, 100 parts of diethoxydimethylsilane solution, 150 parts of γ-aminopropyldiethoxymethylsilane solution, 80 parts of NaOH solution and 110 parts of bentonite aluminum extraction residue were stirred at a rate of 300 rpm for 20 min to obtain an organic silicon-aluminum composite component;

[0052] S2: adding 120 parts of polyethylene glycol to the organosilicon-aluminum composite component obtained in step S1; and mixing with 20 parts of ethylene-propylene copolymer at a stirring rate of 500 rpm for 30 minutes to obtain an inhibitor;

[0053] S3: 25 parts of methanesulfonic acid and 5 parts of emulsifier are dissolved in 20 parts of deionized water, and stirred at a stirring rate of 5000 rpm for 30 minutes to obtain an emulsion;

[0054] S4: Add 20 parts of modified organic soil, 20 parts of modified vegetable gum hydroxypropyl guar gum, 10 parts of diethylaminoethyl methacrylate, 30 parts of hydroxymethyl cellulose and 10 parts of methacryloyloxyethyl trimethyl ammonium chloride to the emulsion obtained in step S3 at a stirring rate of 300 rpm, stir for 20 minutes, then add 0.5 parts of initiator, heat to 78° C., react for 6 hours, add 30 parts of white oil, stir for 30 minutes at a stirring rate of 300 rpm, and mix well to obtain a tackifier;

[0055] S5: 70 parts of soybean oil, 10 parts of methanol and 25 parts of fine flake graphite particles were heated to 100°C and stirred at a stirring rate of 400 rpm for 3 hours to mix evenly, and then cooled to room temperature to obtain a lubricant;

[0056] S6: 0.5 parts of the inhibitor obtained in step S2, 0.5 parts of the viscosity enhancer obtained in step S4, 2 parts of the lubricant obtained in step S5, and 10 parts of 2-acrylamido-2-methylpropanesulfonic acid (AMPS) selected as a fluid loss reducer are mixed at a stirring rate of 300 rpm for 20 minutes to obtain a drilling fluid composition after mixing evenly.

[0057] Example 2

[0058] This embodiment provides a drilling fluid composition and a preparation method thereof, the specific details of which are as follows:

[0059] S1: 110 parts of AlCl3 solution, 120 parts of diethoxydimethylsilane solution, 180 parts of γ-aminopropyldiethoxymethylsilane solution, 90 parts of NaOH solution and 120 parts of bentonite aluminum extraction residue were stirred at a rate of 300 rpm for 20 min to obtain an organic silicon-aluminum composite component;

[0060] S2: adding 130 parts of polyethylene glycol to the organosilicon-aluminum composite component obtained in step S1; and mixing with 30 parts of ethylene-propylene copolymer at a stirring rate of 500 rpm for 30 minutes to obtain an inhibitor;

[0061] S3: 20 parts of methanesulfonic acid and 15 parts of emulsifier were dissolved in 30 parts of deionized water, and stirred at a stirring rate of 5000 rpm for 30 min to obtain an emulsion;

[0062] S4: Add 25 parts of modified organic soil, 40 parts of modified vegetable gum hydroxypropyl guar gum, 15 parts of N,N-diethylaminoethyl acrylate, 50 parts of hydroxymethyl cellulose and 20 parts of methacryloyloxyethyl trimethyl ammonium chloride to the emulsion obtained in step S3, stir at a stirring rate of 300 rpm for 20 minutes, then add 0.5 parts of initiator, heat to 78°C, react for 6 hours, add 30 parts of diesel, stir at a stirring rate of 300 rpm for 30 minutes to mix evenly to obtain a tackifier;

[0063] S5: 90 parts of rapeseed oil, 30 parts of methanol and 30 parts of fine flake graphite particles are heated to 100° C. and stirred at a stirring rate of 400 rpm for 3 h to mix evenly, and then cooled to room temperature to obtain a lubricant;

[0064] S6: 3.5 parts of the inhibitor obtained in step S2, 0.6 parts of the viscosity enhancer obtained in step S4, 2.5 parts of the lubricant obtained in step S5, and 6 parts of carboxymethyl starch selected as a fluid loss reducer are mixed at a stirring rate of 300 rpm for 20 minutes to obtain a drilling fluid composition after mixing evenly.

[0065] Example 3

[0066] S1: 120 parts of AlCl3 solution, 120 parts of diethoxydimethylsilane solution, 150 parts of γ-aminopropyldiethoxymethylsilane solution, 100 parts of NaOH solution and 115 parts of bentonite aluminum extraction residue were stirred at a rate of 300 rpm for 20 min to obtain an organic silicon-aluminum composite component;

[0067] S2: adding 140 parts of polyethylene glycol to the organosilicon-aluminum composite component obtained in step S1; and mixing with 30 parts of ethylene-propylene copolymer at a stirring rate of 500 rpm for 30 minutes to obtain an inhibitor;

[0068] S3: Dissolve 20 parts of methanesulfonic acid and 5 parts of emulsifier in 20 parts of deionized water, and stir at a stirring rate of 5000 rpm for 30 minutes to obtain an emulsion;

[0069] S4: adding 20 parts of modified organic soil, 40 parts of modified vegetable gum hydroxypropyl guar gum, 10 parts of dimethylaminoethyl methacrylate, 50 parts of hydroxymethyl cellulose and 20 parts of methacryloyloxyethyl trimethyl ammonium chloride to the emulsion obtained in step S3 at a stirring rate of 300 rpm, stirring for 20 minutes, then adding 1 part of initiator, heating the temperature to 78° C., reacting for 6 hours, adding 30 parts of base oil, stirring at a stirring rate of 300 rpm for 30 minutes to mix evenly to obtain a tackifier;

[0070] S5: 90 parts of peanut oil, 10-30 parts of methanol and 40 parts of fine flake graphite particles are heated to 100° C. and stirred at a stirring rate of 400 rpm for 3 hours to mix evenly, and then cooled to room temperature to obtain a lubricant;

[0071] S6: 5 parts of the inhibitor obtained in step S2, 1 part of the viscosity enhancer obtained in step S4, 5 parts of the lubricant obtained in step S5, and 10 parts of carboxymethyl cellulose selected as a fluid loss reducer are mixed at a stirring rate of 300 rpm for 20 minutes to obtain a drilling fluid composition after mixing evenly.

[0072] Example 4

[0073] S1: 100 parts of AlCl3 solution, 120 parts of diethoxydimethylsilane solution, 180 parts of γ-aminopropyldiethoxymethylsilane solution, 95 parts of NaOH solution and 110 parts of bentonite aluminum extraction residue were stirred at a rate of 300 rpm for 20 min to obtain an organic silicon-aluminum composite component;

[0074] S2: adding 140 parts of polyethylene glycol to the organosilicon-aluminum composite component obtained in step S1; and mixing with 50 parts of ethylene-propylene copolymer at a stirring rate of 500 rpm for 30 minutes to obtain an inhibitor;

[0075] S3: dissolving 50 parts of methanesulfonic acid and 8 parts of sodium secondary alkyl sulfonate, an emulsifier, in 50 parts of deionized water, stirring at a stirring rate of 5000 rpm for 30 min to obtain an emulsion;

[0076] S4: add 40 parts of modified organic soil, 30 parts of modified vegetable gum hydroxypropyl guar gum, 30 parts of diethylaminoethyl methacrylate, 50 parts of hydroxymethyl cellulose and 30 parts of methacryloyloxyethyl trimethyl ammonium chloride to the emulsion obtained in step S3 at a stirring rate of 300 rpm, stir for 20 minutes, then add 0.9 parts of initiator, heat to 78° C., react for 6 hours, add 30 parts of white oil, stir for 30 minutes at a stirring rate of 300 rpm, and mix well to obtain a tackifier;

[0077] S5: 80 parts of soybean oil, 20 parts of methanol and 50 parts of fine flake graphite particles were heated to 100° C. and stirred at a stirring rate of 400 rpm for 3 h to mix evenly, and then cooled to room temperature to obtain a lubricant;

[0078] S6: 4.5 parts of the inhibitor obtained in step S2, 0.7 parts of the viscosity enhancer obtained in step S4, 3 parts of the lubricant obtained in step S5, and 12 parts of sulfomethyl lignite (SMC) selected as a fluid loss reducer are mixed at a stirring rate of 300 rpm for 20 minutes to obtain a drilling fluid composition after mixing evenly.

[0079] Comparative Example 1

[0080] This comparative example provides a drilling fluid composition, and its preparation method is the same as that of Example 1, except that the organic silicon-aluminum composite component only contains γ-aminopropyldiethoxymethylsilane solution.

[0081] Comparative Example 2

[0082] This comparative example provides a drilling fluid composition, and its preparation method is the same as that of Example 1, except that ordinary bentonite aluminum extraction residue is added.

[0083] Comparative Example 3

[0084] This comparative example provides a drilling fluid composition, and its preparation method is the same as that of Example 1, except that fine flake graphite particles are not added.

[0085] Test Case

[0086] The drilling fluid compositions prepared in Examples 1-4 and Comparative Examples 1-3 were tested, and the test results are shown in Table 1:

[0087] Table 1

[0088]

[0089]

[0090] In summary, the drilling fluid composition of the present invention is added with treated bentonite aluminum extraction residue, the active silicon dioxide therein generates active silicon salt, and undergoes a cementing effect with clay minerals, etc., so that the mineral particles such as clay are condensed into a solid whole, thereby sealing the shale, improving the mechanical strength of the prepared composition when in use, and increasing the durability of the drilling fluid during use. The raw material inside the lubricant uses soybean oil, which is relatively easy to obtain, which greatly reduces the cost of the composition during production and manufacturing, making the composition easily biodegradable and less polluting to the environment, and more green and environmentally friendly. Fine flake graphite particles are added to the lubricant, so that the prepared composition can improve thermal conductivity during use, thereby reducing the temperature of the drill bit and increasing the service life of the drill bit.

[0091] Any numerical value mentioned in the present invention, if there is only an interval of two units between any minimum value and any maximum value, includes all values ​​from the minimum value to the maximum value each time increasing by one unit. For example, if the amount of a component, or the value of a process variable such as temperature, pressure, time, etc. is declared to be 50-90, in this specification it means that 51-89, 52-88... and 69-71 and 70-71 are specifically listed. For non-integer values, 0.1, 0.01, 0.001 or 0.0001 can be appropriately considered as a unit. These are just some specially specified examples. In this application, in a similar manner, all possible combinations of numerical values ​​between the listed minimum and maximum values ​​are considered to have been disclosed.

[0092] It should be noted that the embodiments described above are only used to explain the present invention and do not constitute any limitation to the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory words, rather than restrictive words. The present invention may be modified as specified within the scope of the claims of the present invention, and the present invention may be revised without departing from the scope and spirit of the present invention. Although the present invention described therein relates to specific methods, materials and embodiments, it does not mean that the present invention is limited to the specific examples disclosed therein, on the contrary, the present invention can be extended to all other methods and applications with the same functions.

Claims

1. A drilling fluid composition, characterized in that: The preparation raw materials include: an inhibitor, a viscosity enhancer, a fluid loss reducer and a lubricant; the mass ratio of the inhibitor, the viscosity enhancer, the fluid loss reducer and the lubricant is (0.5-5): (0.1-1): (2-12): (0.5-5); The inhibitor is at least one of an organic silicon aluminum composite component, polyethylene glycol and an ethylene-propylene copolymer.

2. The drilling fluid composition according to claim 1, characterized in that: The organic silicon-aluminum composite component comprises: 100-120 parts of AlCl3 solution, 100-120 parts of diethoxydimethylsilane solution, 150-180 parts of γ-aminopropyldiethoxymethylsilane solution, 80-100 parts of NaOH solution and 110-120 parts of bentonite aluminum extraction residue; The concentration of the AlCl3 solution is 1.3-1.8 mol / L, and / or, The concentration of the diethoxydimethylsilane solution is 1.3-1.8 mol / L, and / or, The concentration of the γ-aminopropyldiethoxymethylsilane solution is 1.3-1.8 mol / L, and / or, The concentration of the NaOH solution is 0.7-0.9 mol / L.

3. The drilling fluid composition according to claim 1, characterized in that: The viscosity enhancer component comprises: 20-50 parts of modified organic soil, 20-40 parts of modified vegetable gum, 10-30 parts of unsaturated amino acid ester, 20-50 parts of methyl sulfonic acid, 50-100 parts of polyethylene glycol, 30-50 parts of hydroxymethyl cellulose, 10-30 parts of quaternary ammonium salt, 5-15 parts of emulsifier, 30-60 parts of base oil and 0.5-1.5 parts of initiator.

4. The drilling fluid composition according to claim 3, characterized in that: The modified organic soil is bentonite that has been activated and modified; the activation and modification comprises soaking the aluminum extraction residue of bentonite in a 2 mol / L NaOH solution for 7 hours; and / or The modified vegetable gum is hydroxypropyl guar gum; and / or The unsaturated amino acid ester is at least one of diethylaminoethyl methacrylate, N,N-diethylaminoethyl acrylate, and dimethylaminoethyl methacrylate; and / or The quaternary ammonium salt is methacryloyloxyethyl trimethyl ammonium chloride; and / or The base oil is diesel or white oil; and / or The emulsifier is at least one of calcium sulfonate, sodium secondary alkyl sulfonate, sodium polyacrylate, calcium oleate, and sodium dicyclohexyl sulfosuccinate; and / or The initiator is a mixture of ammonium persulfate and sodium sulfite in a mass ratio of 1:(1-4).

5. The drilling fluid composition according to any one of claims 1 to 4, characterized in that: The lubricant component comprises 70-90 parts of vegetable oil, 10-30 parts of methanol and 20-50 parts of fine flake graphite particles.

6. The drilling fluid composition according to claim 5, characterized in that: The vegetable oil is selected from at least one of soybean oil, peanut oil or rapeseed oil; and / or, The particle size of the fine flake graphite particles is 110-150 meshes.

7. The drilling fluid composition according to claim 1, characterized in that: The fluid loss reducer is selected from at least one of sulfomethyl lignite (SMC), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), modified starch and carboxymethyl cellulose; the modified starch includes carboxymethyl starch, hydroxyethyl starch and hydroxypropyl starch.

8. A method for preparing the drilling fluid composition according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: AlCl3 solution, diethoxydimethylsilane solution, γ-aminopropyldiethoxymethylsilane solution, 80-100 parts of NaOH solution and 110-120 parts of bentonite aluminum extraction residue are mixed to obtain an organic silicon-aluminum composite component; S2: adding polyethylene glycol and ethylene-propylene copolymer to the organosilicon-aluminum composite component obtained in step S1 to obtain an inhibitor; S3: dissolving methanesulfonic acid and an emulsifier in deionized water to obtain an emulsion; S4: adding modified organic soil, modified vegetable gum, unsaturated amino acid ester, hydroxymethyl cellulose and quaternary ammonium salt to the emulsion obtained in step S3, and then adding initiator to react, and after the reaction, adding base oil, and mixing evenly to obtain a tackifier; S5: heating and mixing soybean oil, methanol and fine flake graphite particles, and cooling to obtain a lubricant; S6: the inhibitor obtained in step S2, the viscosity enhancer obtained in step S4, the lubricant obtained in step S5, and the fluid loss reducer are uniformly mixed to obtain a drilling fluid composition.

9. The preparation method according to claim 8, characterized in that: In step S1, the mixing conditions include: a stirring rate of 200-500 rpm and a stirring time of 20-30 min; and / or In step S2, the mixing conditions include: a stirring rate of 200-500 rpm and a stirring time of 20-30 min; and / or In step S3, the emulsification conditions include: a stirring rate of 4000-5000 rpm and a stirring time of 20-30 min; and / or In step S4, the reaction conditions for adding the initiator include: a temperature of 75-78° C. and a reaction time of 4-6 h; and / or In step S5, the heating temperature is 100-110° C.; the mixing conditions include: a stirring rate of 200-500 rpm and a stirring time of 3-4 h; and / or In step S6, the mixing conditions include: a stirring rate of 200-500 rpm and a stirring time of 10-60 min.

10. Use of the drilling fluid composition according to any one of claims 1 to 7 or the drilling fluid composition prepared by the preparation method according to any one of claims 8 or 9 in the field of water-based drilling fluids.

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