Rock debris and hydrochloric acid reaction kinetic parameter testing method

Abstract

The invention discloses a rock debris and hydrochloric acid reaction kinetic parameter testing method, and belongs to the technical field of oil and gas exploitation. The preparation method comprises the following steps: obtaining rock debris, carrying out ball milling treatment on the obtained rock debris, and screening rock debris particles. The obtained rock debris is subjected to ball milling treatment, the rock debris particles meeting the preset particle size interval requirement are screened out to be closer to the geological condition of an underground rock core, and the prepared rock debris sample can be directly used for static reaction with acid liquor and can also be pressed into rock cakes to be subjected to dynamic reaction with the acid liquor; therefore, the tested static and dynamic reaction kinetic parameters of the carbonate rock and the acid liquor can better reflect the actual reaction condition of the acid liquor in the underground stratum. According to the method, the problems that the number of underground rock cores is limited, the sampling cost is high and the determination of static and dynamic reaction kinetic parameters restricting the carbonate rock and the acid liquor is insufficient are solved, and the practicability is high.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas exploitation, and in particular to a method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid. Background Art

[0002] As oil and gas are produced, the formation gradually becomes inferior in quality. Acid is often injected into the formation to etch out some channels through the reaction between carbonate salts in the formation and the acid, thereby increasing the amount of oil and gas produced. In addition, mud and pollutants during drilling, pollutants generated during production, etc. will block the flow channels of the formation. In this case, acid is often injected into the formation to dredge these channels through the reaction between carbonate rock and acid, so as to achieve the purpose of unblocking and increasing production. The type of acid and the amount of acid used will affect the production increase effect. Therefore, it is necessary to determine the static and dynamic reaction kinetic parameters of carbonate rock and acid in order to determine the type and amount of acid.

[0003] At present, downhole cores are often processed into cylindrical rock samples, and the cylindrical rock samples are reacted with acid on a rotating rock disc tester. After the reaction is completed, the ratio of the mass difference of the cylindrical rock sample before and after the reaction to the reaction time is determined as the reaction rate of the cylindrical rock sample and the acid. Alternatively, the ratio of the concentration difference of the acid before and after the reaction to the reaction time is determined as the reaction rate of the cylindrical rock sample and the acid. Afterwards, the reaction kinetic parameters are obtained through the reaction rate.

[0004] However, the number of downhole cores is limited and the sampling cost is high. In the absence of downhole cores or when downhole cores are scarce, it is impossible to obtain cylindrical rock samples and determine the static and dynamic reaction kinetic parameters of carbonate rock and acid. Summary of the invention

[0005] The purpose of the present invention is to provide a method for testing the kinetic parameters of the reaction of rock fragments with hydrochloric acid, so as to solve the problem that the number of existing downhole cores is limited and the sampling cost is high, which restricts the determination of the static and dynamic reaction kinetic parameters of carbonate rock with acid.

[0006] The technical solution of the present invention to solve the above technical problems is as follows:

[0007] In one aspect, the present invention provides a method for preparing a rock cuttings sample, the method comprising:

[0008] Obtain rock cuttings;

[0009] The obtained rock cuttings are subjected to ball milling treatment, so that the rock cutting particles of different sizes and different sharpness become smooth and round, and the rock cutting particles that meet the preset sphericity requirements are obtained;

[0010] Screening the rock cuttings particles to obtain rock cuttings particles that meet the requirements of a preset particle size range;

[0011] The selected rock cutting particles that meet the preset particle size range requirements are used for the kinetic parameter test of the reaction between rock cuttings and hydrochloric acid.

[0012] Furthermore, in the method for preparing the rock cuttings samples, the rock cuttings are also subjected to core drying treatment before ball milling, including: the rock cuttings retrieved from the well are dried at a constant temperature, taken out and weighed after the initial 4 hours, and then taken out and weighed every 1 hour until the weight of the rock cuttings remains constant, and then the core is taken out and placed in a dryer to cool.

[0013] Furthermore, in the method for preparing the rock cuttings sample, screening the rock cuttings particles comprises:

[0014] Using a first mesh sieve to sieve the rock cuttings particles, and taking the sieve-undersized particles as first rock cuttings particles;

[0015] The first rock cuttings particles are screened using a second mesh sieve having a mesh number smaller than that of the first mesh sieve, and the material on the sieve is taken as the second rock cuttings particles, so as to obtain rock cuttings particles that meet the requirements of the preset particle size range.

[0016] Another aspect of the present invention provides a method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid, the method comprising:

[0017] Pressing the rock cuttings sample obtained by the preparation method of claim 1 into a rock cake, and obtaining the diameter of the rock cake;

[0018] The top and side walls of the rock cake are sealed with a heat shrinkable rubber sleeve to obtain the weight of the rock cake before and after sealing, and the permeability and porosity of the rock cake before sealing;

[0019] The rock cake was heated and pressurized with acid solution in a rotating state to react, and the experimental time was set. The reaction time of each sample was fixed at 5 minutes. After the reaction was completed, it was dried to obtain the weight of the rock cake after the reaction;

[0020] Determine the reaction area of ​​the rock cake and the acid solution according to the diameter of the rock cake, and determine the reaction weight difference of the rock cake according to the weight of the rock cake before and after the reaction;

[0021] According to the determined reaction area, reaction time, and weight difference of the rock cake before and after the reaction, and based on the reaction between the rock cake and the acid solution, dynamic reaction kinetic parameters of the carbonate rock and the acid solution are determined.

[0022] Another aspect of the present invention provides a system for testing kinetic parameters of a reaction between rock fragments and hydrochloric acid, the system comprising:

[0023] An acquisition module is used to press the diameter of the rock cake, the weight of the rock cake before and after plastic sealing, the reaction time, and the total mass of the rock cake before and after the reaction with the acid solution;

[0024] The first determination module is used to determine the reaction area between the rock cake and the acid solution according to the diameter of the pressed rock cake;

[0025] The second determination module is used to determine the mass difference of the rock cake before and after the reaction based on the total mass of the plastic-sealed rock cake before and after the reaction with the acid solution;

[0026] The third determination module is used to determine the dynamic reaction kinetic parameters of the carbonate rock and the acid solution based on the reaction of the rock cuttings sample and the acid solution according to the reaction area, the mass difference of the rock cake before and after the reaction, and the reaction time.

[0027] Another aspect of the present invention provides a method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid, the method comprising:

[0028] Obtaining the total mass of the rock cutting sample before and after the reaction with hydrochloric acid, the density, sphericity and particle size parameters of the rock cutting particles in the rock cutting sample, and the concentration of the acid solution before and after the reaction; the rock cutting sample is prepared by the above-mentioned preparation method, and the rock cutting sample includes a plurality of rock cutting particles;

[0029] Determining the number of rock cuttings particles in the rock cuttings sample before the reaction according to the total mass of the rock cuttings sample before the reaction, the density and particle size parameters of the rock cuttings particles;

[0030] Determine the reaction area according to the particle size and sphericity of the rock cutting particles and the number of rock cutting particles in the rock cutting sample before the reaction, wherein the reaction area is the total surface area of ​​the rock cutting particles in the rock cutting sample before the reaction;

[0031] According to the determined reaction area, the concentration of the acid solution before and after the reaction, and the total mass of the rock cuttings sample before and after the reaction, the reaction kinetic parameters of the carbonate rock and the acid solution are determined based on the reaction of the rock cuttings sample and the acid solution.

[0032] Furthermore, in the method for testing the kinetic parameters of the reaction between rock fragments and hydrochloric acid, the particle size of the rock fragment particles in the rock fragment sample is obtained as follows:

[0033] Obtaining the mesh size of the first mesh sieve and the mesh size of the second mesh sieve;

[0034] Taking the average value of the sieve hole size of the first mesh sieve and the sieve hole size of the second mesh sieve to determine the particle size of the rock cutting particles;

[0035] Preferably, the number of rock cuttings particles in the rock cutting sample before the reaction is determined as follows:

[0036] Determining the mass of the rock cuttings particles based on the density and particle size of the rock cuttings particles;

[0037] Dividing the total mass of the rock cuttings sample before the reaction by the mass of the rock cuttings particles to obtain the number of rock cuttings particles in the rock cuttings sample before the reaction;

[0038] Preferably, the reaction area is determined as follows:

[0039] Calculating the surface area of ​​the rock cuttings particles based on the particle size and sphericity of the rock cuttings particles;

[0040] The reaction area is determined by multiplying the surface area of ​​the rock cuttings by the number of rock cuttings in the rock cutting sample before the reaction;

[0041] Preferably, the determination of the density of rock cutting particles in the rock cutting sample comprises:

[0042] Obtaining the volume of water required to completely immerse the rock cuttings sample before reaction, and the sum of the volumes of the rock cuttings sample and the water when the rock cuttings sample before reaction is immersed in the water;

[0043] Subtract the volume of water required to completely immerse the rock cuttings sample before reaction from the volume sum to obtain the volume of the rock cuttings sample before reaction;

[0044] The total mass of the rock chip sample before the reaction is divided by the volume of the rock chip sample before the reaction to obtain the density of the rock chip particles in the rock chip sample.

[0045] Furthermore, in the method for testing the kinetic parameters of the reaction between rock fragments and hydrochloric acid, the kinetic parameters of the reaction between carbonate rock and acid solution are determined as follows:

[0046] Determination of the reaction degree between the carbonate rock and the acid solution: the ratio between the concentration difference of the acid solution before and after the reaction and the concentration of the acid solution before the reaction;

[0047] Or, the ratio of the mass difference of the rock cuttings sample before and after the reaction to the mass of the rock cuttings sample before the reaction,

[0048] Determination of the reaction rate of the carbonate rock and the acid solution: the ratio of the concentration difference of the acid solution before and after the reaction to the reaction time;

[0049] Or, the ratio of the mass difference of the rock cuttings sample before and after the reaction to the reaction time, divided by the reaction area;

[0050] Determination of reaction constant: based on the reaction rate between the carbonate rock and the acid solution.

[0051] Another aspect of the present invention provides a system for testing kinetic parameters of a reaction between rock fragments and hydrochloric acid, the system comprising:

[0052] An acquisition module, used to acquire the total mass of the rock cutting sample before and after the reaction, the density, sphericity and particle size of the rock cutting particles in the rock cutting sample, and the concentration of the acid solution before and after the reaction, wherein the rock cutting sample includes a plurality of rock cutting particles;

[0053] A fourth determination module, used to determine the number of rock cuttings particles in the rock cuttings sample before the reaction according to the total mass of the rock cuttings sample before the reaction, the density and the particle size of the rock cuttings particles;

[0054] A fifth determination module, for determining a reaction area according to the particle size and sphericity of the rock cutting particles and the number of rock cutting particles in the rock cutting sample before the reaction, wherein the reaction area is the total surface area of ​​the rock cutting particles in the rock cutting sample before the reaction;

[0055] The sixth determination module is used to determine the static reaction kinetic parameters of the carbonate rock and the acid solution based on the reaction of the rock cuttings sample with the acid solution according to the reaction area, the concentration of the acid solution before and after the reaction, and the mass of the rock cuttings sample before and after the reaction.

[0056] On the other hand, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method for testing the kinetic parameters of the reaction of rock fragments with hydrochloric acid as described above are implemented.

[0057] The present invention has the following beneficial effects:

[0058] The present invention ball-mills the obtained rock cuttings and screens out rock cutting particles that meet the requirements of the preset particle size range to be closer to the geological conditions of the underground core. The obtained rock cutting samples can be directly used for static reaction with acid solution, and can also be pressed into rock cakes for dynamic reaction with acid solution. The static and dynamic reaction kinetic parameters of carbonate rock and acid solution tested in this way can better reflect the actual reaction of acid solution in underground formations. The present invention overcomes the problem of limited number of underground cores and high sampling cost, solves the problem of insufficient determination of static and dynamic reaction kinetic parameters of carbonate rock and acid solution, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0060] Figure 1 is a flow chart of the method for preparing rock cuttings samples in Example 1 of the present invention;

[0061] Figure 2 This is a flow chart of the method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid in Example 2 of the present invention;

[0062] Figure 3 This is a flow chart of the method for testing the kinetic parameters of the reaction between rock fragments and hydrochloric acid in Example 4 of the present invention. DETAILED DESCRIPTION

[0063] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0064] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0065] Example 1

[0066] Please refer to Figure 1 This embodiment provides a method for preparing a rock cuttings sample, the preparation method comprising:

[0067] Step S1: obtaining rock cuttings;

[0068] Step S2: ball milling the obtained rock cuttings to make the rock cutting particles of different sizes and sharp angles become smooth and round, so as to obtain rock cutting particles that meet the preset sphericity requirements;

[0069] Step S3: screening the rock cuttings particles to obtain rock cuttings particles that meet the requirements of a preset particle size range;

[0070] The selected rock cutting particles that meet the preset particle size range requirements are used for the kinetic parameter test of the reaction between rock cuttings and hydrochloric acid.

[0071] Furthermore, the rock cuttings before ball milling are also subjected to core drying treatment, including: the rock cuttings retrieved from the well are dried at a constant temperature, taken out and weighed after the initial 4 hours, and then taken out and weighed every 1 hour until the weight of the rock cuttings remains constant, and then the core is taken out and placed in a dryer to cool.

[0072] Further, screening the rock cuttings particles comprises:

[0073] Using a first mesh sieve to sieve the rock cuttings particles, and taking the sieve-undersized particles as first rock cuttings particles;

[0074] The first rock cuttings particles are screened using a second mesh sieve having a mesh number smaller than that of the first mesh sieve, and the material on the sieve is taken as the second rock cuttings particles, so as to obtain rock cuttings particles that meet the requirements of the preset particle size range.

[0075] Example 2

[0076] Please refer to Figure 2 The embodiment of the present invention provides a method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid, the method comprising:

[0077] Step S1: Pressing the rock cuttings sample prepared by the preparation method of Example 1 into a rock cake, and obtaining the diameter of the rock cake;

[0078] Step S2: using a heat shrinkable rubber sleeve to plastic-seal the top and side walls of the rock cake, obtaining the weight of the rock cake before and after plastic-seal, and obtaining the permeability and porosity of the rock cake before plastic-seal;

[0079] Step S3: The rock cake is subjected to a reaction with the acid solution under heating and pressurization in a rotating state, and the experimental time is set. The reaction time of each sample is fixed, and after the reaction is completed, the rock cake is dried to obtain the weight of the rock cake after the reaction;

[0080] Step S4: determining the reaction area of ​​the rock cake and the acid solution according to the diameter of the rock cake, and determining the reaction weight difference of the rock cake according to the weight of the rock cake before and after the reaction;

[0081] Step S5: According to the determined reaction area, reaction time, and weight difference of the rock cake before and after the reaction, based on the reaction between the rock cake and the acid solution, dynamic reaction kinetic parameters of the salt carbonate rock and the acid solution are determined.

[0082] Example 3

[0083] The embodiment of the present invention provides a system for testing kinetic parameters of a reaction between rock fragments and hydrochloric acid, the system comprising:

[0084] An acquisition module is used to press the diameter of the rock cake, the weight of the rock cake before and after plastic sealing, the reaction time, and the total mass of the rock cake before and after the reaction with the acid solution;

[0085] The first determination module is used to determine the reaction area between the rock cake and the acid solution according to the diameter of the pressed rock cake;

[0086] The second determination module is used to determine the mass difference of the rock cake before and after the reaction based on the total mass of the plastic-sealed rock cake before and after the reaction with the acid solution;

[0087] The third determination module is used to determine the dynamic reaction kinetic parameters of the carbonate rock and the acid solution based on the reaction of the rock cuttings sample and the acid solution according to the reaction area, the mass difference of the rock cake before and after the reaction, and the reaction time.

[0088] Example 4

[0089] Please refer to Figure 3 The embodiment of the present invention provides a method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid, the method comprising:

[0090] Step S1: obtaining the total mass of the rock cutting sample before and after the reaction with hydrochloric acid, the density, sphericity and particle size parameters of the rock cutting particles in the rock cutting sample, and the concentration of the acid solution before and after the reaction; the rock cutting sample is prepared by the above-mentioned preparation method, and the rock cutting sample includes a plurality of rock cutting particles;

[0091] Step S2: determining the number of rock cuttings particles in the rock cuttings sample before the reaction according to the total mass of the rock cuttings sample before the reaction, the density and particle size parameters of the rock cuttings particles;

[0092] Step S3: determining a reaction area according to the particle size and sphericity of the rock cutting particles and the number of rock cutting particles in the rock cutting sample before the reaction, wherein the reaction area is the total surface area of ​​the rock cutting particles in the rock cutting sample before the reaction;

[0093] Step S4: According to the determined reaction area, the concentration of the acid solution before and after the reaction, and the total mass of the rock cuttings sample before and after the reaction, based on the reaction of the rock cuttings sample with the acid solution, the reaction kinetic parameters of the carbonate rock and the acid solution are determined.

[0094] Furthermore, in the method for testing the kinetic parameters of the reaction between rock fragments and hydrochloric acid, the particle size of the rock fragment particles in the rock fragment sample is obtained as follows:

[0095] Obtaining the mesh size of the first mesh sieve and the mesh size of the second mesh sieve;

[0096] The average value of the sieve hole size of the first mesh sieve and the sieve hole size of the second mesh sieve is taken to determine the particle size of the rock cutting particles.

[0097] Furthermore, the number of rock cuttings particles in the rock cuttings sample before the reaction is determined as:

[0098] Determining the mass of the rock cuttings particles based on the density and particle size of the rock cuttings particles;

[0099] Dividing the total mass of the rock cuttings sample before the reaction by the mass of the rock cuttings particles to obtain the number of rock cuttings particles in the rock cuttings sample before the reaction;

[0100] Further, the reaction area is determined as follows:

[0101] Calculating the surface area of ​​the rock cuttings particles based on the particle size and sphericity of the rock cuttings particles;

[0102] The reaction area is determined by multiplying the surface area of ​​the rock cuttings particles by the number of rock cuttings particles in the rock cutting sample before the reaction.

[0103] Further, the determination of the density of rock cutting particles in the rock cutting sample includes:

[0104] Obtaining the volume of water required to completely immerse the rock cuttings sample before reaction, and the sum of the volumes of the rock cuttings sample and the water when the rock cuttings sample before reaction is immersed in the water;

[0105] Subtract the volume of water required to completely immerse the rock cuttings sample before reaction from the volume sum to obtain the volume of the rock cuttings sample before reaction;

[0106] The total mass of the rock chip sample before the reaction is divided by the volume of the rock chip sample before the reaction to obtain the density of the rock chip particles in the rock chip sample.

[0107] Furthermore, the reaction kinetic parameters of the carbonate rock and the acid solution are determined as follows:

[0108] Determination of the reaction degree between the carbonate rock and the acid solution: the ratio between the concentration difference of the acid solution before and after the reaction and the concentration of the acid solution before the reaction;

[0109] Or, the ratio of the mass difference of the rock cuttings sample before and after the reaction to the mass of the rock cuttings sample before the reaction,

[0110] Determination of the reaction rate of the carbonate rock and the acid solution: the ratio of the concentration difference of the acid solution before and after the reaction to the reaction time;

[0111] Or, the ratio of the mass difference of the rock cuttings sample before and after the reaction to the reaction time, divided by the reaction area;

[0112] Determination of reaction constant: based on the reaction rate between the carbonate rock and the acid solution.

[0113] Example 4

[0114] The embodiment of the present invention provides a system for testing kinetic parameters of a reaction between rock fragments and hydrochloric acid, the system comprising:

[0115] An acquisition module, used to acquire the total mass of the rock cutting sample before and after the reaction, the density, sphericity and particle size of the rock cutting particles in the rock cutting sample, and the concentration of the acid solution before and after the reaction, wherein the rock cutting sample includes a plurality of rock cutting particles;

[0116] A fourth determination module, used to determine the number of rock cuttings particles in the rock cuttings sample before the reaction according to the total mass of the rock cuttings sample before the reaction, the density and the particle size of the rock cuttings particles;

[0117] A fifth determination module, for determining a reaction area according to the particle size and sphericity of the rock cutting particles and the number of rock cutting particles in the rock cutting sample before the reaction, wherein the reaction area is the total surface area of ​​the rock cutting particles in the rock cutting sample before the reaction;

[0118] The sixth determination module is used to determine the static reaction kinetic parameters of the carbonate rock and the acid solution based on the reaction of the rock cuttings sample with the acid solution according to the reaction area, the concentration of the acid solution before and after the reaction, and the mass of the rock cuttings sample before and after the reaction.

[0119] Example 5

[0120] An embodiment of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method for testing kinetic parameters of the reaction of rock fragments with hydrochloric acid as described above are implemented.

[0121] The computer-readable storage medium is a memory device in a computer device for storing programs and data. It is understandable that the computer-readable storage medium here can include both built-in storage media in a computer device and, of course, extended storage media supported by the computer device. The computer-readable storage medium provides a storage space, which stores the operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by a processor are also stored in the storage space, and these instructions can be one or more computer programs (including program codes). It should be noted that the computer-readable storage medium here can be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk memory. The processor can load and execute one or more instructions stored in the computer-readable storage medium to implement the corresponding steps of the fast automated modeling system suitable for research reactors in the above embodiments. It should be understood by those skilled in the art that the embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0122] Example application:

[0123] The PS8 downhole rock cuttings were retrieved on site, and after being rounded, they were screened by a vibrating screen, and the rock cuttings with a size of 150 μm or more and 70 μm or less were taken out of the sieve. According to the experimental operation steps in the test method for the kinetic parameters of the reaction of rock fragments with hydrochloric acid provided in Example 2, the sample was prepared, and the vernier caliper measured a diameter of 2.504 cm. The weight of the rock cake after sealing was 25.6903 g. The permeability was measured by a pressure-covering porosity tester to be 9.15E-04 mD and the porosity was 0.08%.

[0124] Place the sample on the plastic sealer and seal it in the reactor. Pour 500mL of 20% gelled acid into the preheated reactor. Increase the pressure to 3MPa and heat to 150℃. Turn on the rotary agitator at a speed of 700r / min. Introduce the gelled acid into the reactor and react with the rock cake for 5min.

[0125] After cleaning, take out and dry, weigh and get the sample mass after the experiment to be 24.4220g.

[0126] The final calculation data is:

[0127]

[0128] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A method for preparing rock cuttings samples, characterized in that: The preparation method comprises: Obtain rock cuttings; The obtained rock cuttings are subjected to ball milling treatment, so that the rock cutting particles of different sizes and different sharpness become smooth and round, and the rock cutting particles that meet the preset sphericity requirements are obtained; Screening the rock cuttings particles to obtain rock cuttings particles that meet the requirements of a preset particle size range; The selected rock cuttings particles that meet the preset particle size range requirements are used for the kinetic parameter test of the reaction between rock cuttings and hydrochloric acid.

2. The method for preparing rock cuttings samples according to claim 1, characterized in that: The rock cuttings are also subjected to core drying treatment before ball milling, including: the rock cuttings retrieved from the well are dried at a constant temperature, taken out and weighed after the initial 4 hours, and then taken out and weighed every 1 hour until the weight of the rock cuttings remains constant, and then the core is taken out and placed in a dryer to cool.

3. The method for preparing rock cuttings samples according to claim 1, characterized in that: Screening the rock cuttings particles comprises: Using a first mesh sieve to sieve the rock cuttings particles, and taking the sieve-undersized particles as first rock cuttings particles; The first rock cuttings particles are screened using a second mesh sieve having a mesh number smaller than that of the first mesh sieve, and the material on the sieve is taken as the second rock cuttings particles, so as to obtain rock cuttings particles that meet the requirements of the preset particle size range.

4. A method for testing the kinetic parameters of the reaction between rock fragments and hydrochloric acid, characterized in that: The method comprises: Pressing the rock cuttings sample obtained by the preparation method of claim 1 into a rock cake, and obtaining the diameter of the rock cake; The top and side walls of the rock cake are sealed with a heat shrinkable rubber sleeve to obtain the weight of the rock cake before and after sealing, and the permeability and porosity of the rock cake before sealing; The rock cake was heated and pressurized with acid solution in a rotating state to react, and the experimental time was set. The reaction time of each sample was fixed at 5 minutes. After the reaction was completed, it was dried to obtain the weight of the rock cake after the reaction; Determine the reaction area of ​​the rock cake and the acid solution according to the diameter of the rock cake, and determine the reaction weight difference of the rock cake according to the weight of the rock cake before and after the reaction; According to the determined reaction area, reaction time, and weight difference of the rock cake before and after the reaction, and based on the reaction between the rock cake and the acid solution, dynamic reaction kinetic parameters of the carbonate rock and the acid solution are determined.

5. Rock fragments and hydrochloric acid reaction kinetic parameter testing system, characterized in that: The system comprises: An acquisition module is used to press the diameter of the rock cake, the weight of the rock cake before and after plastic sealing, the reaction time, and the total mass of the rock cake before and after the reaction with the acid solution; The first determination module is used to determine the reaction area between the rock cake and the acid solution according to the diameter of the pressed rock cake; The second determination module is used to determine the mass difference of the rock cake before and after the reaction based on the total mass of the plastic-sealed rock cake before and after the reaction with the acid solution; The third determination module is used to determine the dynamic reaction kinetic parameters of the carbonate rock and the acid solution based on the reaction of the rock cuttings sample and the acid solution according to the reaction area, the mass difference of the rock cake before and after the reaction, and the reaction time.

6. A method for testing the kinetic parameters of the reaction between rock fragments and hydrochloric acid, characterized in that: The method comprises: Obtaining the total mass of the rock cutting sample before and after the reaction with hydrochloric acid, the density, sphericity and particle size parameters of the rock cutting particles in the rock cutting sample, and the concentration of the acid solution before and after the reaction; the rock cutting sample is prepared by the preparation method of claim 1, and the rock cutting sample includes a plurality of rock cutting particles; Determining the number of rock cuttings particles in the rock cuttings sample before the reaction according to the total mass of the rock cuttings sample before the reaction, the density and particle size parameters of the rock cuttings particles; Determine the reaction area according to the particle size and sphericity of the rock cutting particles and the number of rock cutting particles in the rock cutting sample before the reaction, wherein the reaction area is the total surface area of ​​the rock cutting particles in the rock cutting sample before the reaction; According to the determined reaction area, the concentration of the acid solution before and after the reaction, and the total mass of the rock cuttings sample before and after the reaction, the reaction kinetic parameters of the carbonate rock and the acid solution are determined based on the reaction of the rock cuttings sample and the acid solution.

7. The method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid according to claim 6, characterized in that: The particle size of the rock cuttings particles in the rock cuttings sample is obtained as follows: Obtaining the mesh size of the first mesh sieve and the mesh size of the second mesh sieve; Taking the average value of the sieve hole size of the first mesh sieve and the sieve hole size of the second mesh sieve to determine the particle size of the rock cutting particles; Preferably, the number of rock cuttings particles in the rock cutting sample before the reaction is determined as follows: Determining the mass of the rock cuttings particles based on the density and particle size of the rock cuttings particles; Dividing the total mass of the rock cuttings sample before the reaction by the mass of the rock cuttings particles to obtain the number of rock cuttings particles in the rock cuttings sample before the reaction; Preferably, the reaction area is determined as follows: Calculating the surface area of ​​the rock cuttings particles based on the particle size and sphericity of the rock cuttings particles; The reaction area is determined by multiplying the surface area of ​​the rock cuttings by the number of rock cuttings in the rock cutting sample before the reaction; Preferably, the determination of the density of rock cutting particles in the rock cutting sample comprises: Obtaining the volume of water required to completely immerse the rock cuttings sample before reaction, and the sum of the volumes of the rock cuttings sample and the water when the rock cuttings sample before reaction is immersed in the water; Subtract the volume of water required to completely immerse the rock cuttings sample before reaction from the volume sum to obtain the volume of the rock cuttings sample before reaction; The total mass of the rock chip sample before the reaction is divided by the volume of the rock chip sample before the reaction to obtain the density of the rock chip particles in the rock chip sample.

8. The method for testing kinetic parameters of the reaction between rock fragments and hydrochloric acid according to claim 6, characterized in that: The reaction kinetic parameters of the carbonate rock and the acid solution are determined as follows: Determination of the reaction degree between the carbonate rock and the acid solution: the ratio between the concentration difference of the acid solution before and after the reaction and the concentration of the acid solution before the reaction; Or, the ratio of the mass difference of the rock cuttings sample before and after the reaction to the mass of the rock cuttings sample before the reaction, Determination of the reaction rate of the carbonate rock and the acid solution: the ratio of the concentration difference of the acid solution before and after the reaction to the reaction time; Or, the ratio of the mass difference of the rock cuttings sample before and after the reaction to the reaction time, divided by the reaction area; Determination of reaction constant: based on the reaction rate between the carbonate rock and the acid solution.

9. Rock fragments and hydrochloric acid reaction kinetic parameter testing system, characterized in that: The system comprises: An acquisition module, used to acquire the total mass of the rock cutting sample before and after the reaction, the density, sphericity and particle size of the rock cutting particles in the rock cutting sample, and the concentration of the acid solution before and after the reaction, wherein the rock cutting sample includes a plurality of rock cutting particles; A fourth determination module, used to determine the number of rock cuttings particles in the rock cuttings sample before the reaction according to the total mass of the rock cuttings sample before the reaction, the density and the particle size of the rock cuttings particles; A fifth determination module, for determining a reaction area according to the particle size and sphericity of the rock cutting particles and the number of rock cutting particles in the rock cutting sample before the reaction, wherein the reaction area is the total surface area of ​​the rock cutting particles in the rock cutting sample before the reaction; The sixth determination module is used to determine the static reaction kinetic parameters of the carbonate rock and the acid solution based on the reaction of the rock cuttings sample with the acid solution according to the reaction area, the concentration of the acid solution before and after the reaction, and the mass of the rock cuttings sample before and after the reaction.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, wherein when the computer program is executed by a processor, the steps of the method for testing the kinetic parameters of the reaction of rock fragments with hydrochloric acid as described in claim 4 or 6 are implemented.

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