Earthquake physical model material with anisotropic characteristic and preparation method and application thereof

Abstract

The invention belongs to the field of seismic physical model materials, and relates to a seismic physical model material with anisotropic characteristics and a preparation method and application thereof. The seismic physical model material with the anisotropic characteristic comprises the following components in parts by weight: 10-100 parts by weight of wood sheet; 50 to 240 parts by weight of epoxy resin; and 5-40 parts by weight of a curing agent. The seismic physical model material has the following effects: (1) the longitudinal wave velocity difference range of the seismic physical model material with the anisotropic characteristic in the vertical direction and the horizontal direction can reach 50m / s to 1500m / s, and the seismic physical model material with the anisotropic characteristic has the remarkable anisotropic characteristic; and (2) the change range of the longitudinal wave velocity anisotropy parameter epsilon of the seismic physical model material with the anisotropy characteristic is 0.021-0.323, which is more similar to the actual stratum condition, and the physical simulation of most anisotropic stratums can be met.

Description

Technical Field

[0001] The present invention belongs to the field of seismic physical model materials. Specifically, it relates to a seismic physical model material with anisotropic characteristics, a preparation method thereof, and an application thereof. Background Art

[0002] Seismic physical simulation is a forward simulation method that makes a physical model of an actual formation structure or geological body in a laboratory using corresponding materials at a certain scale similarity ratio and simulates and collects field seismic exploration using ultrasonic testing methods. Currently, the most commonly used materials for seismic physical models are moldable materials, that is, mixtures of some liquid or powder materials that become solid by adding a curing agent or changing the temperature. Such model materials have good uniformity and plasticity and can conveniently make physical models of complex structures. Epoxy resin and silicone rubber are the most commonly used moldable materials suitable for constructing seismic physical models. The prior art mostly uses a method of mixing epoxy resin, silicone rubber, and inorganic substances such as talcum powder. Such physical simulation materials are all isotropic media, that is, they have the same velocity in the vertical and horizontal directions after curing.

[0003] In recent years, fractured reservoirs and unconventional shale reservoirs have become the key directions for oil and gas exploration. Due to the existence of horizontal or vertical fractures, fractured reservoirs have significant anisotropic characteristics, that is, there are differences in the propagation velocities of seismic waves in the vertical and horizontal directions of the reservoir. Unconventional shale reservoirs also have anisotropic characteristics due to the existence of shale bedding. Conventional seismic physical model materials are isotropic media, that is, ultrasonic waves have the same velocity in the vertical and horizontal directions of the materials. Therefore, when conducting physical simulation of anisotropic reservoirs, it is very crucial to develop a model material with anisotropic characteristics. Yin Zhiheng (2012) used a method of embedding low-velocity thin slices in epoxy resin to simulate anisotropic media, but the longitudinal wave velocity anisotropy ε of the obtained physical model was less than 0.033, far less than the anisotropic parameters of the actual formation (the anisotropic parameters of shale reservoirs are usually greater than 0.1). Ding Pinbo (2017) made physical models of anisotropic media with different scales of fractures, and the longitudinal wave velocity anisotropy ε of all of them was less than 0.06, also far less than the anisotropic parameters of the actual formation.

[0004] In summary, how to achieve a model material with a high longitudinal wave velocity anisotropy ε is the key to determining whether the physical model technology can simulate anisotropic reservoirs with high similarity, and it is also related to whether the seismic physical model technology can have long-term development. Summary of the Invention

[0005] In order to overcome the above problems existing in the prior art, the present invention provides a seismic physical model material with anisotropic characteristics, a preparation method and an application thereof. The longitudinal wave velocity anisotropy parameter ε of the seismic physical model material with anisotropic characteristics of the present invention varies in the range of 0.021 to 0.323, which is more similar to the actual formation situation and can meet the physical simulation of most anisotropic formations.

[0006] In order to achieve the above object, a first aspect of the present invention provides a seismic physical model material with anisotropic characteristics, comprising the following components in parts by weight:

[0007] Wood veneer: 10-100 parts by weight;

[0008] Epoxy resin: 50-240 parts by weight;

[0009] Curing agent: 5-40 parts by weight.

[0010] According to the present invention, preferably, it comprises the following components in parts by weight:

[0011] Wood veneer: 20-90 parts by weight;

[0012] Epoxy resin: 80-240 parts by weight;

[0013] Curing agent: 10-30 parts by weight.

[0014] According to the present invention, preferably, the thickness of the wood veneer is less than 3 mm, preferably 0.05-1 mm, more preferably 0.1-0.3 mm.

[0015] According to the present invention, preferably, the viscosity of the epoxy resin is 9000-13000 mPa·s, and the epoxy resin is preferably selected from at least one of E-51 type epoxy resin, E-44 type epoxy resin and E-55 type epoxy resin.

[0016] Preferably, the curing agent is an amine curing agent, preferably an amine curing agent with an amine value less than 400 mgKOH / g, and more preferably selected from at least one of cashew oil modified fatty amine, aromatic curing agent and organic acid curing agent.

[0017] A second aspect of the present invention provides a preparation method of the seismic physical model material with anisotropic characteristics, comprising the following steps:

[0018] Step S1: Preheat the epoxy resin and the curing agent respectively to obtain the preheated epoxy resin and the preheated curing agent;

[0019] Step S2: Stir the preheated epoxy resin and the preheated curing agent evenly to obtain a mixed solution, and then immerse the wood flakes in the mixed solution for soaking;

[0020] Step S3: Take out the soaked wood slices, lay them flat layer by layer in the mold in the same wood grain direction, and then perform pressing, curing, and demolding to obtain the seismic physical model material with anisotropic characteristics.

[0021] According to the present invention, preferably, in step S1, the preheating conditions include: the temperature is 30 - 60°C, preferably 40 - 50°C, and the time is 5 - 20 h, preferably 10 - 15 h.

[0022] According to the present invention, preferably, before step S3, it further includes: evenly applying vaseline on the inner surface of the physical model curing mold as a release agent.

[0023] According to the present invention, preferably, in step S3, the pressing conditions include: the pressure is 1 - 100 MPa, preferably 5 - 50 MPa, and the time is 1 - 20 min, preferably 5 - 15 min.

[0024] Preferably, the curing conditions include: the temperature is 30 - 60°C, preferably 40 - 50°C, and the time is 10 - 40 h, preferably 20 - 30 h.

[0025] The third aspect of the present invention provides the application of the seismic physical model material with anisotropic characteristics or the seismic physical model material with anisotropic characteristics prepared according to the preparation method in seismic physical simulation.

[0026] The anisotropic seismic physical model material and its preparation method provided by the present invention have the following effects:

[0027] (1) The vertical and horizontal P - wave velocity difference range of the seismic physical model material with anisotropic characteristics of the present invention can reach 50 m / s to 1500 m / s, having significant anisotropic characteristics.

[0028] (2) The variation range of the P - wave velocity anisotropy parameter ε of the seismic physical model material with anisotropic characteristics of the present invention is 0.021 to 0.323, being more similar to the actual formation conditions and capable of meeting the physical simulation of most anisotropic formations.

[0029] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above - mentioned and other objects, features, and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0031] Figure 1 Schematic diagram of a specific preparation method of the seismic physical model material with anisotropic characteristics of the present invention.

[0032] Figure 2 Schematic diagram of the variation of the vertical and horizontal P-wave velocity differences of the model material in Example 1 with the compaction pressure.

[0033] Figure 3 Schematic diagram of the variation of the P-wave velocity anisotropy parameter ε of the model material in Example 1 with the compaction pressure. Detailed implementation manners

[0034] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein.

[0035] To achieve the above object, a first aspect of the present invention provides a seismic physical model material with anisotropic characteristics, including the following components by weight:

[0036] Wood veneer 10 - 100 parts by weight;

[0037] Epoxy resin 50 - 240 parts by weight;

[0038] Curing agent 5 - 40 parts by weight.

[0039] In the present invention, reservoirs such as fractured reservoirs and unconventional shales have anisotropic characteristics, that is, there are obvious differences in velocity in the vertical and horizontal directions. Conventional physical model formable materials mostly add inorganic materials such as talcum powder and silicon powder to plastic organic materials such as epoxy resin. After curing, the model materials have the same velocity in all directions and do not have anisotropic characteristics. Due to the fact that the wood grain of wood develops parallel to the direction of the tree trunk, resulting in obvious differences in its physical properties in the directions perpendicular and parallel to the wood grain, wood is a natural anisotropic medium. Introducing it into the field of seismic physical model materials can realize the research and development of anisotropic physical model materials.

[0040] According to the present invention, preferably, it includes the following components by weight:

[0041] Wood veneer 20 - 90 parts by weight;

[0042] Epoxy resin 80 - 240 parts by weight;

[0043] Curing agent 10 - 30 parts by weight.

[0044] According to the present invention, preferably, the thickness of the wood veneer is less than 3 mm, preferably 0.05 - 1 mm, more preferably 0.1 - 0.3 mm.

[0045] According to the present invention, preferably, the viscosity of the epoxy resin is 9000-13000 mPa·s, and the epoxy resin is preferably selected from at least one of E-51 type epoxy resin, E-44 type epoxy resin and E-55 type epoxy resin.

[0046] Preferably, the curing agent is an amine curing agent, preferably an amine curing agent with an amine value less than 400 mgKOH / g, and more preferably selected from at least one of cashew oil modified fatty amine, aromatic curing agent and organic acid curing agent.

[0047] The second aspect of the present invention provides a method for preparing the seismic physical model material with anisotropic characteristics, comprising the following steps:

[0048] Step S1: Preheat the epoxy resin and the curing agent respectively to obtain the preheated epoxy resin and the preheated curing agent;

[0049] Step S2: Stir the preheated epoxy resin and the preheated curing agent evenly to obtain a mixed solution, and then immerse the wood flakes in the mixed solution for soaking;

[0050] Step S3: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, and then carry out pressing, curing and demolding to obtain the seismic physical model material with anisotropic characteristics.

[0051] In the present invention, by using the method of laminating wood flakes impregnated with epoxy resin, a model material with anisotropic characteristics can be realized. The vertical and horizontal P-wave velocity difference range of the developed model material is 50 m / s to 1500 m / s, and the variation range of the P-wave velocity anisotropy parameter ε is 0.021 to 0.323, which lays a foundation for the physical simulation of anisotropic geological bodies or reservoirs with different characteristics.

[0052] According to the present invention, preferably, in step S1, the preheating conditions include: the temperature is 30-60°C, preferably 40-50°C, and the time is 5-20 h, preferably 10-15 h.

[0053] According to the present invention, preferably, before step S3, it further includes: evenly applying vaseline on the inner surface of the physical model curing mold as a release agent.

[0054] According to the present invention, preferably, in step S3, the pressing conditions include: the pressure is 1-100 MPa, preferably 5-50 MPa, and the time is 1-20 min, preferably 5-15 min.

[0055] Preferably, the curing conditions include: the temperature is 30-60°C, preferably 40-50°C, and the time is 10-40 h, preferably 20-30 h.

[0056] The third aspect of the present invention provides the application of the seismic physical model material with anisotropic characteristics or the seismic physical model material with anisotropic characteristics prepared according to the preparation method in seismic physical simulation.

[0057] The raw material information used in the examples and comparative examples of the present invention is as follows:

[0058] Epoxy resin E51: Produced by Shanghai Resin Factory.

[0059] Curing agent F50: Cashew oil-modified aliphatic amine ZY-F50; amine value: 200 - 300 mgKOH / g; Produced by Xuzhou Zhongyan Chemical Co., Ltd.

[0060] Wood veneer: Beech solid wood veneer; thickness 0.2 mm; Jinhua Hongsen Wood Processing Co., Ltd.

[0061] In the examples and comparative examples of the present invention, the parts are all parts by weight. The longitudinal wave velocities in the vertical and horizontal directions of the physical model material are all measured by the ultrasonic transmission method, and the longitudinal wave velocity anisotropy parameter ε is calculated by the following formula:

[0062]

[0063] Example 1

[0064] The seismic physical model material with anisotropic characteristics in this example includes the following components in parts by weight:

[0065] Wood veneer 80 parts by weight;

[0066] Epoxy resin 200 parts by weight;

[0067] Curing agent 20 parts by weight.

[0068] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown, and includes the following steps:

[0069] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0070] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0071] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements and stir well, and immerse all the wood veneers in the epoxy resin for 30 minutes;

[0072] Step S4, Laminate the thin slices: Take out the soaked wood thin slices, lay them flat layer by layer in the mold along the same wood grain direction, set the press pressure to 5 MPa respectively, and press for 10 min;

[0073] Step S5, Curing process: After removing the press pressure, put the mold into an incubator at 40 °C and cure for 24 hours, then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0074] Example 2

[0075] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0076] Wood thin slices 80 parts by weight;

[0077] Epoxy resin 200 parts by weight;

[0078] Curing agent 20 parts by weight.

[0079] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown, and includes the following steps:

[0080] Step S1, Material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in an incubator at 45 °C and preheat for 12 hours;

[0081] Step S2, Mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0082] Step S3, Material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements and stir well, then immerse all the wood thin slices in the epoxy resin and soak for 30 min;

[0083] Step S4, Laminate the thin slices: Take out the soaked wood thin slices, lay them flat layer by layer in the mold along the same wood grain direction, set the press pressure to 10 MPa respectively, and press for 10 min;

[0084] Step S5, Curing process: After removing the press pressure, put the mold into an incubator at 40 °C and cure for 24 hours, then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0085] Example 3

[0086] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0087] Wood thin slices 80 parts by weight;

[0088] Epoxy resin 200 parts by weight;

[0089] 20 parts by weight of curing agent.

[0090] The method for preparing the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0091] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0092] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0093] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements, stir well, and immerse all the wood flakes in the epoxy resin for 30 minutes;

[0094] Step S4, thin plate lamination: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 20 MPa respectively, and press for 10 minutes;

[0095] Step S5, curing process: After removing the press pressure, place the mold in a 40°C incubator and cure for 24 hours, then demold and take out, and the production of the seismic physical model material with anisotropic characteristics is completed.

[0096] Example 4

[0097] The seismic physical model material with anisotropic characteristics in this example includes the following components in parts by weight:

[0098] 80 parts by weight of wood board flakes;

[0099] 200 parts by weight of epoxy resin;

[0100] 20 parts by weight of curing agent.

[0101] The method for preparing the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0102] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0103] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0104] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements, stir well, and immerse all the wood flakes in the epoxy resin for 30 minutes;

[0105] Step S4, thin sheet lamination: Take out the soaked wood thin sheets, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 30 MPa respectively, and press for 10 min;

[0106] Step S5, curing process: After removing the press pressure, put the mold into an incubator at 40 °C and cure for 24 hours, then demold and take out, that is, complete the production of the seismic physical model material with anisotropic characteristics.

[0107] Example 5

[0108] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0109] Wood thin sheets 80 parts by weight;

[0110] Epoxy resin 200 parts by weight;

[0111] Curing agent 20 parts by weight.

[0112] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown, and includes the following steps:

[0113] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in an incubator at 45 °C and preheat for 12 hours;

[0114] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0115] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements and stir well, immerse all the wood thin sheets in the epoxy resin and soak for 30 min;

[0116] Step S4, thin sheet lamination: Take out the soaked wood thin sheets, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 40 MPa respectively, and press for 10 min;

[0117] Step S5, curing process: After removing the press pressure, put the mold into an incubator at 40 °C and cure for 24 hours, then demold and take out, that is, complete the production of the seismic physical model material with anisotropic characteristics.

[0118] Example 6

[0119] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0120] Wood thin sheets 80 parts by weight;

[0121] 200 parts by weight of epoxy resin;

[0122] 20 parts by weight of curing agent.

[0123] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0124] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0125] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0126] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements and stir well. Immerse all the wood flakes in the epoxy resin and soak for 30 minutes;

[0127] Step S4, thin plate lamination: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 50 MPa respectively, and press for 10 minutes;

[0128] Step S5, curing process: After removing the press pressure, place the mold in a 40°C incubator and cure for 24 hours, then demold and take out, and the production of the seismic physical model material with anisotropic characteristics is completed.

[0129] Example 7

[0130] The seismic physical model material with anisotropic characteristics in this example includes the following components in parts by weight:

[0131] 80 parts by weight of wood board flakes;

[0132] 200 parts by weight of epoxy resin;

[0133] 20 parts by weight of curing agent.

[0134] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0135] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0136] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0137] Step S3, Material Mixing: Weigh the epoxy resin and curing agent according to the formulation requirements, stir well, and immerse all the wood flakes in the epoxy resin for 30 minutes.

[0138] Step S4, Flake Laminating: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 1 MPa respectively, and press for 10 minutes.

[0139] Step S5, Curing Process: After removing the press pressure, put the mold into a 40°C incubator for curing for 24 hours, then demold and take out, and the production of the seismic physical model material with anisotropic characteristics is completed.

[0140] Example 8

[0141] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0142] Wood flakes 80 parts by weight;

[0143] Epoxy resin 200 parts by weight;

[0144] Curing agent 20 parts by weight.

[0145] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0146] Step S1, Material Preparation: According to the requirements of the model materials, place the epoxy resin and curing agent in a 45°C incubator for preheating for 12 hours.

[0147] Step S2, Mold Treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent.

[0148] Step S3, Material Mixing: Weigh the epoxy resin and curing agent according to the formulation requirements, stir well, and immerse all the wood flakes in the epoxy resin for 30 minutes.

[0149] Step S4, Flake Laminating: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 80 MPa respectively, and press for 10 minutes.

[0150] Step S5, Curing Process: After removing the press pressure, put the mold into a 40°C incubator for curing for 24 hours, then demold and take out, and the production of the seismic physical model material with anisotropic characteristics is completed.

[0151] Example 9

[0152] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0153] 30 parts by weight of wood flakes;

[0154] 200 parts by weight of epoxy resin;

[0155] 10 parts by weight of curing agent.

[0156] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown, and includes the following steps:

[0157] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0158] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0159] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements and stir evenly. Immerse all the wood flakes in the epoxy resin and soak for 30 minutes;

[0160] Step S4, thin slice lamination: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 5 MPa, and press for 10 minutes;

[0161] Step S5, curing process: After removing the press pressure, put the mold into a 40°C incubator and cure for 24 hours, then demold and take out, and the production of the seismic physical model material with anisotropic characteristics is completed.

[0162] Example 10

[0163] The seismic physical model material with anisotropic characteristics in this example includes the following components in parts by weight:

[0164] 40 parts by weight of wood flakes;

[0165] 200 parts by weight of epoxy resin;

[0166] 12 parts by weight of curing agent.

[0167] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown, and includes the following steps:

[0168] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0169] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0170] Step S3, Material Mixing: Weigh epoxy resin and curing agent according to the formula requirements and stir well. Immerse all the wood flakes in the epoxy resin and soak for 30 minutes.

[0171] Step S4, Flake Laminating: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 10 MPa, and press for 10 minutes.

[0172] Step S5, Curing Process: After removing the press pressure, put the mold into an incubator at 40 °C and cure for 24 hours, then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0173] Example 11

[0174] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0175] Wood flakes 50 parts by weight;

[0176] Epoxy resin 200 parts by weight;

[0177] Curing agent 16 parts by weight.

[0178] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0179] Step S1, Material Preparation: According to the requirements of the model materials, place the epoxy resin and curing agent in an incubator at 45 °C and preheat for 12 hours.

[0180] Step S2, Mold Treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent.

[0181] Step S3, Material Mixing: Weigh epoxy resin and curing agent according to the formula requirements and stir well. Immerse all the wood flakes in the epoxy resin and soak for 30 minutes.

[0182] Step S4, Flake Laminating: Take out the soaked wood flakes, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 15 MPa, and press for 10 minutes.

[0183] Step S5, Curing Process: After removing the press pressure, put the mold into an incubator at 40 °C and cure for 24 hours, then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0184] Example 12

[0185] The seismic physical model material with anisotropic characteristics in this embodiment includes the following components by weight:

[0186] 70 parts by weight of thin wood sheets;

[0187] 200 parts by weight of epoxy resin;

[0188] 24 parts by weight of curing agent.

[0189] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0190] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0191] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0192] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements and stir well, then immerse all the wood thin sheets in the epoxy resin for 30 minutes;

[0193] Step S4, thin sheet lamination: Take out the soaked wood thin sheets, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 20 MPa, and press for 10 minutes;

[0194] Step S5, curing process: After removing the press pressure, place the mold in a 40°C incubator and cure for 24 hours, then demold and take out, and the production of the seismic physical model material with anisotropic characteristics is completed.

[0195] Example 13

[0196] The seismic physical model material with anisotropic characteristics in this embodiment includes the following components by weight:

[0197] 75 parts by weight of thin wood sheets;

[0198] 200 parts by weight of epoxy resin;

[0199] 28 parts by weight of curing agent.

[0200] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0201] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0202] Step S2, Mold Treatment: Evenly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0203] Step S3, Material Mixing: Weigh epoxy resin and curing agent according to the formula requirements and stir well. Immerse all the wood flakes in the epoxy resin for 30 minutes;

[0204] Step S4, Flake Laminating: Take out the soaked wood flakes and lay them flat layer by layer in the mold in the same wood grain direction. Set the press pressure to 25 MPa and press for 10 minutes;

[0205] Step S5, Curing Process: After removing the press pressure, put the mold into an incubator at 40 °C for 24 hours of curing, and then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0206] Example 14

[0207] The seismic physical model material with anisotropic characteristics in this example includes the following components by weight:

[0208] Wood flakes 80 parts by weight;

[0209] Epoxy resin 200 parts by weight;

[0210] Curing agent 30 parts by weight.

[0211] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0212] Step S1, Material Preparation: According to the requirements of the model materials, place the epoxy resin and curing agent in an incubator at 45 °C for preheating for 12 hours;

[0213] Step S2, Mold Treatment: Evenly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0214] Step S3, Material Mixing: Weigh epoxy resin and curing agent according to the formula requirements and stir well. Immerse all the wood flakes in the epoxy resin for 30 minutes;

[0215] Step S4, Flake Laminating: Take out the soaked wood flakes and lay them flat layer by layer in the mold in the same wood grain direction. Set the press pressure to 30 MPa and press for 10 minutes;

[0216] Step S5, Curing Process: After removing the press pressure, put the mold into an incubator at 40 °C for 24 hours of curing, and then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0217] Example 15

[0218] The seismic physical model material with anisotropic characteristics in this embodiment comprises the following components by weight:

[0219] 80 parts by weight of thin wood slices;

[0220] 200 parts by weight of epoxy resin;

[0221] 20 parts by weight of curing agent.

[0222] The preparation method of the seismic physical model material with anisotropic characteristics is as Figure 1 shown and includes the following steps:

[0223] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0224] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0225] Step S3, material mixing: Weigh the epoxy resin and the curing agent according to the formula requirements and stir well, then immerse all the wood slices in the epoxy resin and soak for 30 minutes;

[0226] Step S4, thin slice lamination: Take out the soaked wood slices, lay them flat layer by layer in the mold in the same wood grain direction, set the press pressure to 40 MPa, and press for 10 minutes;

[0227] Step S5, curing process: After removing the press pressure, place the mold in a 40°C incubator and cure for 24 hours, then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0228] Comparative Example 1

[0229] The seismic physical model material in this comparative example comprises the following components by weight:

[0230] 200 parts by weight of epoxy resin;

[0231] 20 parts by weight of curing agent.

[0232] The preparation method of the seismic physical model material is as Figure 1 shown and includes the following steps:

[0233] Step S1, material preparation: According to the requirements of the model materials, place the epoxy resin and the curing agent in a 45°C incubator and preheat for 12 hours;

[0234] Step S2, mold treatment: Uniformly apply vaseline on the inner surface of the physical model curing mold as a release agent;

[0235] Step S3, Material Mixing: Weigh epoxy resin and curing agent according to the formulation requirements, stir well, and pour into a mold.

[0236] Step S4, Curing Process: Place the mold in an incubator at 40°C for 24 hours of curing, then demold and take out, thus completing the production of the seismic physical model material with anisotropic characteristics.

[0237] Test Example

[0238] For the seismic physical model materials with anisotropic characteristics obtained in Examples 1 - 15 and the model material obtained in Comparative Example 1, use the ultrasonic transmission method to measure the longitudinal wave velocities in the vertical and horizontal directions of the model materials respectively, and calculate and obtain the longitudinal wave velocity anisotropy parameter ε. The test results are shown in Table 1. Figure 2 It is a graph of the change of the longitudinal wave velocity difference of the seismic physical model material with anisotropic characteristics obtained in Example 1 with the pressing pressure. Figure 3 It is a graph of the change of the longitudinal wave velocity anisotropy parameter ε of the seismic physical model material with anisotropic characteristics obtained in Example 1 with the pressing pressure.

[0239] Table 1

[0240]

[0241]

[0242] As can be seen from Table 1, compared with Comparative Example 1, in the examples, wood flakes were added, and the change range of the longitudinal wave velocity anisotropy parameter ε of the obtained model materials was from 0.021 to 0.323, and the range of the longitudinal wave velocity difference in the vertical and horizontal directions was from 50 m / s to 1500 m / s, laying a foundation for seismic physical simulation of anisotropic geological bodies or reservoirs with different characteristics.

[0243] The above have described the embodiments of the present invention. The above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described embodiments.

Claims

1. A seismic physics model material with anisotropic characteristics, characterized in that: It includes the following components by weight: 10 to 100 parts by weight of wood sheet; Epoxy resin 50-240 parts by weight; 5 to 40 parts by weight of curing agent.

2. The earthquake physics model material with anisotropic characteristics according to claim 1, wherein: It includes the following components by weight: 20-90 parts by weight of wood sheet; 80-240 parts by weight of epoxy resin; 10 to 30 parts by weight of curing agent.

3. The earthquake physics model material with anisotropic characteristics according to claim 1, wherein: The thickness of the wood board sheet is less than 3 mm, preferably 0.05-1 mm, more preferably 0.1-0.3 mm.

4. The earthquake physics model material with anisotropic characteristics according to claim 1, wherein: The viscosity of the epoxy resin is 9000-13000 mPa·s, and the epoxy resin is preferably selected from at least one of E-51 epoxy resin, E-44 epoxy resin and E-55 epoxy resin.

5. The earthquake physics model material with anisotropic characteristics according to claim 1, wherein: The curing agent is an amine curing agent, preferably an amine curing agent with an amine value of less than 400 mgKOH / g, and more preferably at least one selected from cashew nut oil-modified fatty amine, aromatic curing agent and organic acid curing agent.

6. The method for preparing the earthquake physical model material with anisotropic characteristics according to any one of claims 1 to 5, characterized in that: The steps include: Step S1, preheating the epoxy resin and the curing agent respectively to obtain the preheated epoxy resin and the preheated curing agent; Step S2, fully and evenly mixing the preheated epoxy resin and the preheated curing agent into a mixed solution, and then immersing the wood slices into the mixed solution for soaking; Step S3, taking out the soaked wood slices, laying them flat layer by layer in a mold according to the same wood grain direction, and then pressing, curing and demoulding to obtain the earthquake physical model material with anisotropic characteristics.

7. The preparation method according to claim 6, wherein: In step S1, the preheating conditions include: a temperature of 30 to 60°C, preferably 40 to 50°C, and a time of 5 to 20 hours, preferably 10 to 15 hours.

8. The preparation method according to claim 6, wherein: Before step S3, the method further includes: evenly applying vaseline as a release agent on the inner surface of the physical model curing mold.

9. The preparation method according to claim 6, wherein: In step S2, the soaking time is 10 to 50 minutes, preferably 20 to 40 minutes.

10. The preparation method according to claim 6, wherein: In step S3, the pressing conditions include: a pressure of 1 to 100 MPa, preferably 5 to 50 MPa, and a pressing time of 1 to 20 min, preferably 5 to 15 min.

11. The preparation method according to claim 6, wherein: In step S3, the curing conditions include: a temperature of 30 to 60°C, preferably 40 to 50°C, and a time of 10 to 40 hours, preferably 20 to 30 hours.

12. Use of the earthquake physical model material with anisotropic characteristics according to any one of claims 1 to 5 or the earthquake physical model material with anisotropic characteristics prepared by the preparation method according to any one of claims 6 to 11 in earthquake physical simulation.

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