CN112992283A - Crystal-scale dolomite erosion pore formation evolution simulation method and device - Google Patents
Crystal-scale dolomite erosion pore formation evolution simulation method and device Download PDFInfo
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- 229910000514 dolomite Inorganic materials 0.000 title claims abstract description 152
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
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- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 4
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Abstract
The invention discloses a crystal-scale dolomite erosion pore formation evolution simulation method and device, wherein the method comprises the following steps: preparing a dolomite crystal sample; carrying out corrosion simulation experiment on the dolomite crystal sample by using a preset fluid for simulation experiment; collecting a crystal characteristic image of a dolomite crystal sample before a corrosion simulation experiment and a plurality of crystal characteristic images after a plurality of corrosion simulation experiments; and determining evolution characteristic information in the formation process of the dolomite karst etching pore according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments. The method can accurately analyze the formation process of the erosion pore, recognize the development rule of the erosion pore and contribute to improving the prediction reliability of the reservoir.
Description
Technical Field
The invention relates to the technical field of geological exploration and oil-gas exploration, in particular to a crystal-scale dolomite erosion pore formation evolution simulation method and device.
Background
This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Due to the high chemical activity of carbonate rock, erosion cavities are a very important component of the reservoir space of carbonate rock in addition to sedimentary primary pores. Similarly, a number of outcrops and well core research examples have shown that erosion pores or cavities in dolomite can develop relatively well, and it has been revealed in oil and gas production that the degree of erosion cavity development is one of the important factors in controlling oil and gas production. However, due to the complex history of diagenesis, the cause of the erosion vugs is difficult to accurately grasp, the difficulty in understanding the development law is caused, and the high-quality promotion of oil and gas exploration and development is influenced.
Due to the particularity of the erosion action, the occurrence conditions cannot be inverted through corresponding diagenetic product analysis, and the formation mechanism of the erosion holes is known. Therefore, a feasible approach is to reproduce the erosion process using physical simulation, simulating the erosion mechanism. However, the existing erosion experimental methods are all around the research on the erosion amount of carbonate rock under different conditions, that is, whether the carbonate rock can form erosion pores or not is analyzed, the formation process and development mechanism of the erosion pores cannot be researched, the understanding of the development law of the erosion pores is influenced, and the reliability of the distribution prediction of the erosion pores is low.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a crystal-scale dolomite karst etching pore formation evolution simulation method, which is used for solving the technical problem that the existing corrosion experiment method cannot analyze the formation process and the development mechanism of a corrosion pore, and comprises the following steps: preparing a dolomite crystal sample; carrying out corrosion simulation experiment on the dolomite crystal sample by using a preset fluid for simulation experiment; collecting a crystal characteristic image of a dolomite crystal sample before a corrosion simulation experiment and a plurality of crystal characteristic images after a plurality of corrosion simulation experiments; and determining evolution characteristic information in the formation process of the dolomite karst etching pore according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments.
The embodiment of the invention also provides a crystal-scale dolomite karst etching pore formation evolution simulation device, which is used for solving the technical problem that the existing corrosion experiment method cannot analyze the formation process and the development mechanism of the corrosion pore, and the device comprises: the experimental sample preparation module is used for preparing a dolomite crystal sample; the corrosion simulation experiment module is used for carrying out a corrosion simulation experiment on the dolomite crystal sample by utilizing a preset fluid for the simulation experiment; the crystal characteristic image acquisition module is used for acquiring a crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and a plurality of crystal characteristic images after a plurality of corrosion simulation experiments; and the evolution characteristic information determining module is used for determining the evolution characteristic information in the formation process of the dolomite karst etching pore according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments.
The embodiment of the invention also provides computer equipment for solving the technical problem that the existing corrosion experiment method cannot analyze the forming process and the development mechanism of the corrosion hole, the computer equipment comprises a memory, a processor and a computer program which is stored on the memory and can be operated on the processor, and the evolution simulation method for the formation of the corrosion hole of the dolomite at any crystal scale is realized when the processor executes the computer program.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problem that the existing corrosion experiment method cannot analyze the forming process and the development mechanism of the corrosion cavities, and the computer readable storage medium stores a computer program for executing the dolostone corrosion pore formation evolution simulation method with any crystal scale.
In the embodiment of the invention, after the dolomite crystal sample is prepared, the prepared fluid for the simulation experiment is utilized to carry out the corrosion simulation experiment on the dolomite crystal sample, and the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments are collected, so that the evolution characteristic information in the formation process of the dolomite dissolution pore is determined according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments.
By the embodiment of the invention, the forming process of the erosion pore can be accurately analyzed, the development rule of the erosion pore is known, and the reservoir prediction reliability is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
fig. 1 is a flowchart of a crystal-scale dolomitic karst pore formation evolution simulation method provided in an embodiment of the present invention;
fig. 2 is a flowchart of an implementation of a crystal-scale dolomite erosion pore formation evolution simulation method according to an embodiment of the present invention;
FIG. 3 is a schematic representation of a fine-grained dolomite flake feature provided in an embodiment of the present invention;
FIG. 4 is a schematic representation of a coarse grain dolomite flake feature provided in an embodiment of the present invention;
FIG. 5 is a schematic diagram of a scanning electron microscope characterization image before erosion provided in an embodiment of the present invention;
FIG. 6 is a schematic view of a scanning electron microscope characterization image after first erosion according to an embodiment of the present disclosure;
FIG. 7 is a schematic view of a scanning electron microscope characterization image after the second erosion provided in the embodiment of the present invention;
FIG. 8 is a schematic view of a scanning electron microscope characterization image after the third erosion provided in the embodiment of the present invention;
FIG. 9 is a schematic diagram of an evolution simulation apparatus for crystal-scale dolomite karst etching pore formation according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a computer device provided in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In an embodiment of the present invention, a crystal-scale dolomitic karst pore formation evolution simulation method is provided, as shown in fig. 1, the method includes the following steps:
s101, preparing a dolomite crystal sample.
In particular implementations, dolomitic crystal samples having length, width, and thickness dimensions of about 3cm, 2cm, and 1cm, respectively, may be prepared and subjected to argon ion polishing.
And S102, carrying out corrosion simulation experiment on the dolomite crystal sample by using the prepared fluid for the simulation experiment.
In specific implementation, according to the geological background of a dolomite crystal research area (namely, a research area for collecting a dolomite crystal sample), the burial history analysis can be carried out, the experimental conditions such as the corrosion simulation temperature, pressure and fluid conditions of the dolomite crystal can be determined, and the fluid for the simulation experiment for carrying out the corrosion simulation experiment on the dolomite crystal sample can be configured.
S103, collecting a crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and a plurality of crystal characteristic images after a plurality of corrosion simulation experiments.
In specific implementation, the dolomite crystal sample before the experiment can be subjected to field emission scanning electron microscope analysis in a low-voltage mode to obtain a crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment; and carrying out field emission scanning electron microscope analysis on the dolomite crystal sample after each corrosion simulation experiment in a low voltage mode to obtain a crystal characteristic image of the dolomite crystal sample after each corrosion simulation experiment. And if three corrosion simulation experiments are carried out, obtaining crystal characteristic images after the three experiments. In order to facilitate reanalysis of the same position of the sample after corrosion, the position of the dolomite crystal corrosion sample is marked in the embodiment of the invention.
And S104, determining evolution characteristic information in the dolomite karst etching pore forming process according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments.
It should be noted that, when crystal characteristic images before and after an experiment are compared and analyzed, the analyzed evolution characteristic information includes, but is not limited to: the type and the composition of inclusions in the dolomite crystal, crystal inner holes, lattice defects, crystal edges and an asphalt film on the surface of the crystal.
In a specific implementation, the step S104 may be implemented by: marking the position of the dolomite crystal sample; and according to the position of the dolomite crystal sample, carrying out comparison analysis of the same position on the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after a plurality of times of corrosion simulation experiments to obtain evolution characteristic information in the formation process of the dolomite corrosion pore.
In an embodiment, the method for simulating evolution of formation of crystal-scale dolomite karst pores provided in the embodiment of the present invention may further include the following steps: performing mineral petrography analysis on the dolomite crystal sample; determining the experimental conditions for carrying out the corrosion simulation experiment on the dolomite crystal sample, wherein the experimental conditions comprise: dolomitic rock crystal erosion simulates temperature, pressure and fluid conditions.
In particular, when performing mineralogical petrological analysis on a dolomite crystal sample, including but not limited to: carrying out crystal optical observation on the dolomite crystal sample to determine the dolomite type of the dolomite crystal sample; carrying out X-ray diffraction component analysis on the dolomite crystal sample to determine the mineral components and content of the dolomite crystal sample and the dolomite order; and determining the ratio of the magnesium element to the calcium element in the dolomite crystal sample through an electronic probe.
After the experimental conditions for carrying out the erosion simulation experiment on the dolomite crystal sample are determined, the method for simulating the evolution of the formation of the crystal-scale dolomite erosion pores can also be used for preparing a fluid for the simulation experiment according to the determined experimental conditions.
In an embodiment, the method for simulating evolution of formation of crystal-scale dolomite karst pores provided in the embodiment of the present invention may further include the following steps: obtaining reaction generated liquid after each corrosion simulation experiment; carrying out ion component analysis on the reaction generated liquid after each corrosion simulation experiment, and determining the ion concentration of the reaction generated liquid after each corrosion simulation experiment; and comparing the ion concentration of the reaction generated liquid after each corrosion simulation experiment with the initial ion concentration of the fluid for the simulation experiment to determine the content change condition of calcium ions and magnesium ions in the formation process of the dolomite erosion pores.
In an embodiment, after performing ion component analysis on the reaction product liquid after each erosion simulation experiment and determining the ion concentration of the reaction product liquid after each erosion simulation experiment, the method for simulating crystal-scale formation evolution of dolomite karst pores provided in the embodiment of the present invention may further include the following steps: and determining the corrosion evolution path, characteristics and control factors of the dolomite crystal by utilizing the concentration variation of the liquid ions generated by the reaction in the formation process of the cloud-rock corrosion pore and the evolution characteristic information.
Fig. 2 is a flowchart of a specific implementation of a crystal-scale dolomite erosion pore formation evolution simulation method provided in an embodiment of the present invention, and as shown in fig. 2, the method specifically includes:
s201, performing mineral petrography analysis on experimental samples: dolomite crystal sample mineralogical petrography analysis, comprising: core observation, slice identification, X-ray diffraction whole rock analysis and electronic probe.
Specifically, with respect to the collected dolomite crystal sample erosion simulation sample, the dolomite type is determined by core observation and rock slice identification, for example, developed fine crystal euhedral dolomite shown in fig. 3 and coarse crystal other euhedral dolomite shown in fig. 4; performing geochemistry and petrology analysis on the dolomite sample, determining the mineral components and contents of the dolomite and the dolomite order by utilizing the X-ray rock whole-rock analysis, and determining the ratio of magnesium to calcium of the dolomite crystal sample by an electronic probe;
s202, determining simulation experiment conditions according to the burying history: according to the geological background of a dolomite research area, carrying out burial history analysis, determining experimental conditions (dolomite crystal corrosion simulation temperature, pressure and fluid conditions), and configuring a fluid for simulation experiment.
S203, sample preparation: the length, width and thickness dimensions of the sample were about 3cm, 2cm and 1cm, respectively, and then argon ion polishing was performed.
S204, characterization of crystal characteristics before corrosion: the crystal characteristics are characterized in that the crystal characteristics are observed and photographed by utilizing a scanning electron microscope. The crystal characteristics include: the type and the components of inclusions in the dolomite crystal, crystal inner holes, lattice defects, crystal edges and an asphalt film on the crystal surface; the characterization method is field emission scanning electron microscope analysis in a low voltage mode; particularly, the position of an erosion sample of the dolomite crystal sample needs to be marked so as to realize reanalysis of the same position of the sample after erosion; corresponding crystal feature images were acquired as shown in fig. 5.
S205, corrosion simulation experiment: the specific process sequentially comprises sample loading, water injection, pressure boosting, temperature rising, constant temperature, temperature reduction and sampling, and the sampling time is recorded. Carrying out the dolomite crystal sample corrosion simulation by using the dolomite crystal sample corrosion simulation reaction unit; wherein, the dissolution simulation reaction unit of the dolomite crystal sample comprises: a pure water storage tank, a continuous flow liquid pump, a high-pressure container, a high-temperature high-pressure reaction kettle, a pressure display meter, a temperature controller and a sampler; the high-pressure container comprises a hollow high-pressure-resistant metal column, a seal sleeve is arranged at the bottom end of the hollow high-pressure-resistant metal column, a detachable pressure cap is arranged at the top end of the hollow high-pressure-resistant metal column, a sample support is arranged in a cavity of the hollow high-pressure-resistant metal column, the contact surface of the support and a sample is of a net mouth structure, and the height of the support ensures the middle part of the sample re-reaction kettle; the high-temperature high-pressure reaction kettle comprises a heating resistance wire, a high-temperature refractory plate, a metal outer sleeve and a hollow high-temperature and high-pressure resistant metal cylinder, wherein a hollow metal pressure cap and a metal sintering disc are respectively arranged at the bottom end and the top end of the high-temperature high-pressure resistant metal cylinder; the heating resistance wire, the high-temperature refractory plate and the metal outer sleeve are arranged outside the high-temperature and high-pressure resistant metal cylinder; the pressure display meter is used for water-rock reaction pressure in the hollow cavity, and the temperature controller is used for controlling water-rock reaction temperature in the hollow cavity; an outlet of the pure water storage tank is connected with an inlet of the continuous flow liquid pump through a pipeline by an inlet three-way valve, and an outlet of the continuous flow liquid pump is connected with a hollow high-pressure-resistant metal column of the high-pressure container by an outlet three-way valve and a sealing sleeve by a pipeline so as to introduce pure water into a first hollow cavity below the metal piston; an outlet of the pressure cap is connected with the second hollow cavity through a first pressure reducing valve and a hollow metal pressure cap at the bottom end of the second hollow cavity through a pipeline so as to introduce experimental fluid into the second hollow cavity; the hollow metal pressure cap at the top end of the second hollow cavity is connected with the sampler through a second pressure reducing valve through a pipeline.
S206, characterization of crystal characteristics after corrosion: and after the dolomite crystal sample corrosion simulation experiment is analyzed, performing field emission scanning electron microscope analysis again in a low-voltage mode, analyzing the same position of the corroded sample again according to the position of the dolomite crystal sample corrosion sample in S204, wherein the analysis content comprises the type and the components of inclusions in the dolomite crystal, crystal inner holes, lattice defects, crystal edges and a crystal surface asphalt film, and acquiring crystal characteristic images which are correspondingly consistent with those in S204 to achieve in-situ comparative analysis.
Repeating S204 to S206 for the dolomite crystal sample to erode the dolomite crystal sample, carrying out at least three times of dolomite crystal sample erosion simulation, and photographing the result after each erosion, as shown in FIG. 6, FIG. 7 and FIG. 8, so as to obtain a dolomite crystal sample erosion evolution process including erosion pore evolution and erosion amount change.
S207, analyzing ion components of the reaction product liquid: and analyzing ion components of the multiple reaction products, and comparing the ion components with the initial ion concentration of the experimental fluid to obtain the dolomite erosion amount in the dolomite erosion process.
S208, analyzing a crystal erosion evolution path: and evaluating the corrosion evolution path, characteristics and control factors of the dolomite crystal by utilizing the concentration variation of the liquid ions generated by the reaction and the corrosion pore evolution characteristics of the dolomite crystal sample.
Based on the same inventive concept, the embodiment of the present invention further provides a crystal-scale dolomitic karst pore formation evolution simulation apparatus, as in the following embodiments. The principle of the device for solving the problems is similar to the crystal-scale dolostone erosion pore formation evolution simulation method, so the implementation of the device can refer to the implementation of the crystal-scale dolostone erosion pore formation evolution simulation method, and repeated parts are not repeated.
Fig. 9 is a schematic diagram of a crystal-scale dolomite karst pore formation evolution simulation apparatus provided in an embodiment of the present invention, as shown in fig. 9, the apparatus includes: an experimental sample preparation module 901, an erosion simulation experiment module 902, a crystal characteristic image acquisition module 903 and an evolution characteristic information determination module 904.
The experimental sample preparation module 901 is used for preparing a dolomite crystal sample; the corrosion simulation experiment module 902 is used for carrying out a corrosion simulation experiment on the dolomite crystal sample by utilizing a preset fluid for the simulation experiment; a crystal characteristic image acquisition module 903, configured to acquire a crystal characteristic image of the dolomite crystal sample before the erosion simulation experiment and a plurality of crystal characteristic images after a plurality of erosion simulation experiments; and an evolution characteristic information determining module 904, configured to determine evolution characteristic information in a dolomite erosion pore formation process according to the crystal characteristic image of the dolomite crystal sample before the erosion simulation experiment and the plurality of crystal characteristic images after the multiple erosion simulation experiments.
In an embodiment, as shown in fig. 9, the apparatus for simulating evolution of formation of crystal-scale dolomite karst pores provided in the embodiment of the present invention may further include: the mineralogical petrology analysis module 905 is used for carrying out mineralogical petrology analysis on the dolomite crystal sample; an experiment condition determining module 906, configured to determine an experiment condition for performing an erosion simulation experiment on the dolomite crystal sample, where the experiment condition includes: dolomitic rock crystal erosion simulates temperature, pressure and fluid conditions.
In an embodiment, as shown in fig. 9, the apparatus for simulating evolution of formation of crystal-scale dolomite karst pores provided in the embodiment of the present invention may further include: a simulated experimental fluid configuration module 907 for configuring a simulated experimental fluid according to the determined experimental conditions.
In an embodiment, as shown in fig. 9, the apparatus for simulating evolution of formation of crystal-scale dolomite karst pores provided in the embodiment of the present invention may further include: a reaction product liquid acquisition module 908 for acquiring the reaction product liquid after each erosion simulation experiment; a reaction product liquid analysis module 909 configured to perform ion component analysis on the reaction product liquid after each erosion simulation experiment, and determine an ion concentration of the reaction product liquid after each erosion simulation experiment; and the erosion amount analysis module 910 is configured to compare the ion concentration of the reaction product fluid after each erosion simulation experiment with the initial ion concentration of the fluid for the simulation experiment, and determine the content change condition of calcium ions and magnesium ions in the formation process of the dolomite karst erosion pores.
In an embodiment, as shown in fig. 9, the apparatus for simulating evolution of formation of crystal-scale dolomite karst pores provided in the embodiment of the present invention may further include: and the evolution characteristic analysis module 911 is configured to determine an erosion evolution path, characteristics, and control factors of the dolomite crystal by using the concentration variation of the reaction-generated liquid ions and the evolution characteristic information in the formation process of the cloud-rock erosion pores.
Fig. 10 is a schematic diagram of a computer device provided in an embodiment of the present invention, and as shown in fig. 10, the computer device 10 includes a memory 11, a processor 12, and a computer program stored in the memory 11 and operable on the processor 12, and when the processor 12 executes the computer program, the method for simulating the evolution of formation of dolomite erosion voids with any crystal size is implemented.
The embodiment of the invention also provides a computer readable storage medium for solving the technical problem that the existing corrosion experiment method cannot analyze the forming process and the development mechanism of the corrosion cavities, and the computer readable storage medium stores a computer program for executing the dolostone corrosion pore formation evolution simulation method with any crystal scale.
In summary, embodiments of the present invention provide a crystal-scale dolomite crystal sample dissolution pore formation evolution simulation method, device, computer equipment, and computer-readable storage medium, after preparing a dolomite crystal sample, a pre-configured fluid for simulation experiment is used to perform an erosion simulation experiment on the dolomite crystal sample, and by collecting a crystal characteristic image of the dolomite crystal sample before the erosion simulation experiment and a plurality of crystal characteristic images after a plurality of erosion simulation experiments, evolution characteristic information during the formation of the dolomite dissolution pore is determined according to the crystal characteristic image of the dolomite crystal sample before the erosion simulation experiment and the plurality of crystal characteristic images after the plurality of erosion simulation experiments.
By the embodiment of the invention, the forming process of the erosion pore can be accurately analyzed, the development rule of the erosion pore is known, and the reservoir prediction reliability is improved.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (15)
1. A crystal-scale dolomitic litholysis pore formation evolution simulation method is characterized by comprising the following steps:
preparing a dolomite crystal sample;
carrying out corrosion simulation experiment on the dolomite crystal sample by using a preset fluid for simulation experiment;
collecting a crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and a plurality of crystal characteristic images after a plurality of corrosion simulation experiments;
and determining evolution characteristic information in the formation process of the dolomite karst etching pores according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments.
2. The method of claim 1, wherein prior to conducting an erosion simulation experiment on the dolomite crystal sample using a preconfigured simulation experiment fluid, the method further comprises:
performing mineral petrography analysis on the dolomite crystal sample;
determining the experimental conditions for carrying out the corrosion simulation experiment on the dolomite crystal sample, wherein the experimental conditions comprise: dolomitic rock crystal erosion simulates temperature, pressure and fluid conditions.
3. The method of claim 2, wherein performing a mineralogical petrographic analysis on the dolomite crystal sample comprises:
carrying out crystal optical observation on the dolomite crystal sample to determine the dolomite type of the dolomite crystal sample;
carrying out X-ray diffraction component analysis on the dolomite crystal sample to determine the mineral components and content of the dolomite crystal sample and the dolomite order;
and determining the ratio of the magnesium element to the calcium element in the dolomite crystal sample through an electronic probe.
4. The method of claim 2, wherein after determining the experimental conditions for conducting the erosion simulation experiment on the dolomite crystal sample, the method further comprises:
and configuring the fluid for the simulation experiment according to the determined experiment conditions.
5. The method of claim 1, wherein the method further comprises:
obtaining reaction generated liquid after each corrosion simulation experiment;
carrying out ion component analysis on the reaction generated liquid after each corrosion simulation experiment, and determining the ion concentration of the reaction generated liquid after each corrosion simulation experiment;
and comparing the ion concentration of the reaction generated liquid after each corrosion simulation experiment with the initial ion concentration of the fluid for the simulation experiment to determine the content change condition of calcium ions and magnesium ions in the formation process of the dolomite erosion pores.
6. The method of claim 5, wherein after performing an ion composition analysis on the reaction product fluid after each erosion simulation experiment to determine the ion concentration of the reaction product fluid after each erosion simulation experiment, the method further comprises:
and determining the corrosion evolution path, characteristics and control factors of the dolomite crystal by utilizing the concentration variation of the liquid ions generated by the reaction in the formation process of the cloud-rock corrosion pore and the evolution characteristic information.
7. The method of claim 1, wherein determining evolution characteristic information during formation of the dolomite karst pores according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after a plurality of corrosion simulation experiments comprises:
marking the location of the dolomite crystal sample;
and according to the position of the dolomite crystal sample, carrying out comparison analysis of the same position on the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after a plurality of corrosion simulation experiments to obtain evolution characteristic information in the formation process of the dolomite corrosion pore.
8. The method of claim 7, wherein the evolving characterizing information includes: the type and the composition of inclusions in the dolomite crystal, crystal inner holes, lattice defects, crystal edges and an asphalt film on the surface of the crystal.
9. A crystal scale dolomitic pore formation evolution simulation apparatus, comprising:
the experimental sample preparation module is used for preparing a dolomite crystal sample;
the corrosion simulation experiment module is used for carrying out a corrosion simulation experiment on the dolomite crystal sample by utilizing a preset fluid for simulation experiment;
the crystal characteristic image acquisition module is used for acquiring a crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and a plurality of crystal characteristic images after a plurality of corrosion simulation experiments;
and the evolution characteristic information determining module is used for determining the evolution characteristic information in the formation process of the dolomite karst etching pore according to the crystal characteristic image of the dolomite crystal sample before the corrosion simulation experiment and the plurality of crystal characteristic images after the multiple corrosion simulation experiments.
10. The apparatus of claim 9, wherein the apparatus further comprises:
the mineral petrology analysis module is used for carrying out mineral petrology analysis on the dolomite crystal sample;
an experiment condition determining module, configured to determine an experiment condition for performing an erosion simulation experiment on a dolomite crystal sample, where the experiment condition includes: dolomitic rock crystal erosion simulates temperature, pressure and fluid conditions.
11. The apparatus of claim 10, wherein the apparatus further comprises:
and the fluid configuration module for the simulation experiment is used for configuring the fluid for the simulation experiment according to the determined experiment conditions.
12. The apparatus of claim 10, wherein the apparatus further comprises:
the reaction generated liquid acquisition module is used for acquiring the reaction generated liquid after each corrosion simulation experiment;
the reaction generated liquid analysis module is used for carrying out ion component analysis on the reaction generated liquid after each corrosion simulation experiment and determining the ion concentration of the reaction generated liquid after each corrosion simulation experiment;
and the erosion amount analysis module is used for comparing the ion concentration of the reaction generated liquid after each erosion simulation experiment with the initial ion concentration of the fluid for the simulation experiment to determine the content change condition of calcium ions and magnesium ions in the formation process of the dolomite karst erosion pores.
13. The apparatus of claim 12, wherein the apparatus further comprises:
and the evolution characteristic analysis module is used for determining a dolomite crystal erosion evolution path, characteristics and control factors by utilizing the concentration variation of the liquid ions generated by the reaction in the formation process of the cloud-rock erosion pores and the evolution characteristic information.
14. A computer apparatus comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the crystal scale dolomitic karst pore formation evolution simulation method of any of claims 1 to 8 when executing the computer program.
15. A computer-readable storage medium storing a computer program for executing the crystal scale dolomitic pore formation evolution simulation method according to any one of claims 1 to 8.
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