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CN-121990808-A - Simulation material for rock circle scale model and application thereof

CN121990808ACN 121990808 ACN121990808 ACN 121990808ACN-121990808-A

Abstract

The invention provides a simulation material for a rock circle scale model and application thereof, wherein the rock circle scale model comprises an upper crust, a lower crust, a rock circle mantle and a soft circle mantle, the simulation material for the upper crust comprises the following raw materials of silica powder, quartz sand and silicon carbide, the simulation materials for the lower crust and the rock circle mantle comprise the following raw materials of silica gel, quartz sand and silicon carbide, and the simulation material for the soft circle mantle comprises any one of syrup, honey or sodium iodide solution. The simulation material provided by the invention can quantitatively complete a physical simulation experiment of the rock ring scale structure, and the rock ring scale model is scanned through an industrial CT technology to obtain a structure evolution process image, so that the structure evolution characteristics are analyzed, the rheological structure and the layered stretching deformation characteristics of the rock ring can be better simulated, and an effective technical means is provided for researching the development evolution of the rock ring structure deformation.

Inventors

  • CUI JIAN
  • HUANG LINJUN
  • WANG HONGBIN
  • WANG YANJUN
  • MA DELONG

Assignees

  • 中国石油天然气股份有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (10)

  1. 1. A simulated material for a rock-loop scale model, wherein the rock-loop scale model comprises an upper crust, a lower crust, a rock-loop mantle and a soft-loop mantle; the simulation material of the upper crust comprises the following raw materials of silicon micropowder, quartz sand and silicon carbide; the simulated materials of the lower crust and the rock ring mantle comprise the following raw materials of silica gel, quartz sand and silicon carbide.
  2. 2. A simulated material for a rock ring scale model as claimed in claim 1, wherein said silica fume has an average particle size of 800-1200 mesh.
  3. 3. A simulated material for a rock ring scale model as claimed in claim 1 or 2, wherein said quartz sand has an average particle size of 40-120 mesh.
  4. 4. A simulated material for a rock ring scale model as claimed in any one of claims 1-3, wherein said diamond grains have an average grain size of 40-120 mesh.
  5. 5. A simulated material for a rock ring scale model as claimed in any one of claims 1-4, wherein said silica gel has a viscosity of 20000-100000 mPa-s.
  6. 6. A simulated material for a rock circle scale model as claimed in any one of claims 1-5, wherein said simulated material for the upper crust further comprises glass beads; Preferably, the glass beads have an average particle size of 60 to 120 mesh.
  7. 7. A simulated material for a rock ring scale model as claimed in any one of claims 1-6, wherein said simulated material for a soft flow ring mantle comprises any one of syrup, honey or sodium iodide solution.
  8. 8. An experimental method for simulating deformation of a rock ring scale formation using a simulation material according to any one of claims 1-7, the experimental method comprising the steps of: (1) Determining a rock circle scale model according to the principle of similarity between geological parameters and structural simulation of a research area; (2) A soft flow ring mantle, a rock ring mantle, a lower crust and an upper crust are paved layer by layer in the experimental device from bottom to top; (3) After the operation parameters of the experimental device are preset, the experimental device is started, and a deformation process of the rock circle scale model is recorded by adopting a camera device and an industrial CT; (4) And after the experiment is finished, sequentially freezing and slicing the rock circle scale model, and evaluating the internal structural deformation characteristics of the rock circle scale model.
  9. 9. The experimental method according to claim 8, wherein the preparation method of the rock ring mantle in the step (2) comprises mixing silica gel, quartz sand and silicon carbide according to the density and viscosity parameters of the rock ring mantle in the research area, and leveling for 2-3 hours to obtain a first mastic; Preferably, the preparation method of the lower crust in the step (2) comprises the steps of mixing silica gel, quartz sand and silicon carbide according to density and viscosity parameters of the lower crust in a research area, and leveling for 2-3 hours to obtain second sand gum; Preferably, the paving method of the soft-ring mantle in the step (2) comprises pouring a simulation material of the soft-ring mantle into an experimental device according to the density and viscosity parameters of the soft-ring mantle in a research area; Preferably, the paving method of the upper crust in the step (2) comprises paving a layer of silicon carbide on the lower crust according to the density parameter of the upper crust in the research area, and then paving a mixed material of quartz sand and silicon micropowder and the silicon carbide on the silicon carbide alternately.
  10. 10. The method according to claim 8 or 9, wherein the operating parameters of step (3) include an operating speed and an operating distance; Preferably, in the step (3), the side face and the top face of the rock circle scale model are photographed at fixed time by using an image pickup device; Preferably, in step (3), the interior of the rock circle scale model is scanned and imaged by using industrial CT; Preferably, the frozen temperature of step (4) is <0 ℃; Preferably, the freezing time in the step (4) is more than or equal to 12 hours.

Description

Simulation material for rock circle scale model and application thereof Technical Field The invention belongs to the technical field of physical simulation of structural deformation, and relates to a simulation material for a rock ring scale model and application thereof. Background Because the geological process is extremely long, geologist can not directly observe the whole deformation process, and can only obtain the visual characteristics of a moment in the evolution process, so that reasonable deduction is carried out on a wider space-time scale, and the evolution framework of the whole geological process is cleared. At present, a structure simulation experiment is a physical experiment method for researching and simulating deformation characteristics, a causal mechanism and a dynamic process of a natural geological structure phenomenon, and is also called a structure physical simulation experiment. The physical simulation experiment of the structure is characterized in that proper experimental materials are selected to scale the geological entity in the natural world, proper boundary conditions are applied, and the deformation process is reproduced in a limited time and space scale, so that the deformation pattern of the structure is depicted and verified, and further, the control factors and the dynamics mechanism of the deformation of the structure are discussed. Scaling advantages of the structure physical simulation experiment on three-dimensional or even four-dimensional (including time dimension) scale make it widely used in research in the fields of structure geology, petroleum geology and the like. As with other simulation techniques (e.g., numerical simulation), the structural physics modeling experiment does not reproduce the geologic process exactly, but rather systematically discusses some specific factors affecting the deformation mechanism by simplifying the complex geologic model. In addition, the physical modeling experiment is similar to the natural geologic prototype in geometry, kinematics, and dynamics, so that it can represent a natural process, which requires that the model be a scaled down replica of the geologic prototype, length and equal angle (geometric similarity), and that the stress field (rheological) and boundary conditions must be properly scaled. Geometric similarity requires that the corresponding length, speed, etc. ratios between the experimental model and the geologic prototype are consistent with angles, and kinetic similarity requires that the ratio of the stress (including gravity, inertia, viscosity, elasticity, and friction) of the model to the geologic prototype must be constant, which ensures similarity in terms of stress magnitude and trajectory. Geometric similarity and kinetic similarity will provide a complete kinematic similarity, so that model evolution and natural prototyping can be matched, although the experimental model scales to a smaller scale and proceeds on a faster time scale. At present, a physical simulation experiment of the structure can dynamically reproduce the deformation process of the geological structure, know the formation mechanism and evolution rule of the structure, and provide scientific basis for oil and gas exploration. With the continuous and deep research, the scale of the research is also continuously developed, and physical simulation experiments of the rock circle scale are also increasingly emphasized. However, due to the increase of depth, various physical properties of the rock and shallow layers are greatly different, and a new thought is provided for simplifying the treatment mode of the model due to the increase of the dimension. The complexity of the continental deformation during experiments conducted to simulate the rheological structure and structural deformation of the dimensions of a rock ring depends on the complexity of its rheological structure (longitudinal stratification, lateral inhomogeneity of the continental rock ring rheology). The transverse rheology structure determines the continental structure pattern, the longitudinal rheology structure determines the deformation behavior of the continental structure, and the transverse and longitudinal rheology structures together determine the complexity of the continental structure, so that the physical simulation of deep basin (dimension of the continental structure, dimension of the crust) is different from the physical simulation experiment of the deformation (< 10 km) of the crust structure limited to the upper crust, and the whole rheological structure of the continental rock ring needs to be considered. Therefore, according to the rheological structure and physical parameters of the rock ring scale, a proper simulation experiment material is provided and the rock ring scale structural deformation physical simulation experiment is quantitatively completed, so that the characteristics of the rheological structure and layered stretching deformation of the