CN114426755A - Simulated reservoir physical model material and preparation method thereof - Google Patents
Simulated reservoir physical model material and preparation method thereof Download PDFInfo
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- CN114426755A CN114426755A CN202011054530.6A CN202011054530A CN114426755A CN 114426755 A CN114426755 A CN 114426755A CN 202011054530 A CN202011054530 A CN 202011054530A CN 114426755 A CN114426755 A CN 114426755A
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- curing agent
- epoxy resin
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- 239000000463 material Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000003822 epoxy resin Substances 0.000 claims abstract description 24
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004593 Epoxy Substances 0.000 claims abstract description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 4
- 239000010703 silicon Substances 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 238000005086 pumping Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 3
- 239000011863 silicon-based powder Substances 0.000 claims description 3
- 150000001412 amines Chemical class 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 239000000523 sample Substances 0.000 description 20
- 238000004088 simulation Methods 0.000 description 15
- 239000010410 layer Substances 0.000 description 12
- 230000005284 excitation Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 239000004848 polyfunctional curative Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a simulated reservoir physical model material, which comprises the following components: 100 parts by weight of epoxy resin; 40-100 parts of epoxy curing agent; 10-100 parts of silicon carbide powder; wherein the purity of the silicon micro powder is more than 95 percent, and the fineness is 500-1500 meshes.
Description
Technical Field
The invention relates to the field of geophysical exploration, in particular to a reservoir model material for simulating seismic acquisition in geophysical exploration and a preparation method thereof.
Background
The earthquake physical simulation is that field earthquake waves are simulated in a laboratory by utilizing ultrasonic waves, signals are excited and received by an ultrasonic transducer, the method is an effective means for researching the propagation rule of the earthquake waves, a physical model which accords with the actual geological structure or different reservoir types is manufactured in the laboratory, the kinematics and the dynamics characteristics of the earthquake waves in the complex structure and the complex reservoir are researched, and materials for manufacturing the physical model have certain geological characteristics.
The speed of seismic wave propagation in the actual stratum directly reflects the lithology of the stratum. Typically by seismic logging or ultrasonic logging and refers to the velocity of the longitudinal wave. And may also be calculated using reflectance records. In seismic exploration, formations with interval velocities below 1400 m/s are generally called low velocity intervals, and formations above 3500 m/s are considered high velocity intervals. The longitudinal wave velocity of common rock mass is 1.5-6.0 km/s of sedimentary rock, 4.5-6.5 km/s of granite and 3.5-6.5 km/s of metamorphic rock, the seismic physical model material is mainly synthesized by epoxy resin and silicon rubber at present, the sound wave propagation velocity of the material is changed by changing the proportion of the epoxy resin and the silicon rubber, the velocity can be gradually changed from 1000m/s to 2600m/s, the physical models with different velocities are manufactured by 2:1 velocity conversion according to the requirement of the formation velocity, and due to the loss of epoxy proportion high-speed material, the simulation of a high-speed layer in the formation encounters a bottleneck.
Disclosure of Invention
The invention aims to solve the problem of model simulation experiment of high-speed stratum in a geophysical model experiment by developing research on geophysical model materials.
In order to solve the problems in the prior art, the invention provides a high-purity superfine silicon carbide powder physical model material and a preparation method thereof. Epoxy resin and high-purity superfine silicon carbide powder are proportioned, other additives are added, the mixed material is placed into a mold for curing molding, and the content proportion of the high-purity superfine silicon carbide powder is changed to prepare the simulation material with different longitudinal and transverse wave propagation speeds. The defect that the existing molding material does not have high-speed layer matching is overcome, and the novel simulation reservoir material is used for manufacturing a model, has better penetrability when being used for a geophysical simulation experiment, and lays a foundation for manufacturing and testing a reservoir physical model.
The invention aims to provide a simulated reservoir physical model material for an ultrasonic simulation experiment.
The production of the simulated reservoir physical model requires the following:
100 parts by weight of epoxy resin;
40-60 parts of epoxy curing agent;
10-100 parts of silicon micropowder;
wherein the purity of the silicon micro powder is more than 95 percent, and the fineness is 500-1500 meshes.
In a preferred embodiment of the present invention, the epoxy resin is a solid epoxy resin of the BPA type. And preferably E-51.
In a preferred embodiment of the present invention, the curing agent is a modified amine curing agent, preferably curing agent 2216. The amount of the curing agent is 50% of that of the epoxy resin. The epoxy curing agent 593 is commonly used, and the epoxy curing agent is 20% of epoxy, and the casting thickness of more than 5mm is easy to cause the implosion phenomenon.
In a preferred embodiment of the present invention, the fine silicon powder is high-purity ultrafine silicon carbide powder SiC.
In a further preferred embodiment of the invention, the longitudinal wave velocity of said material is between 2600m/s and 3250 m/s.
In a further preferred embodiment of the invention, the transverse wave velocity of the material is between 1500m/s and 2300 m/s.
The invention also aims to provide a preparation method of the simulated reservoir physical model.
The method comprises the following steps: and uniformly mixing the components according to the using amount, and pressing and curing to obtain the seismic physical model.
The method comprises the following steps:
1. material preparation
According to the design requirements of the model, a material formula is selected, and epoxy resin, silica gel, aluminum powder with different meshes, an epoxy curing agent and a silica gel curing agent are weighed according to the using amount of each component.
2. Material mixing
1) Adding the epoxy resin into the micro silicon powder and mixing together;
2) adding the epoxy resin curing agent into the mixture obtained in the step 1) and uniformly mixing;
3) putting the mixture obtained in the step 2) into vacuum-pumping equipment for vacuum-pumping;
4) pouring the vacuumized material obtained in the step 3) into a mold, and curing and molding;
thereby obtaining the material.
The model curing comprises:
(1) pouring the mixture which is vacuumized into a mould to wait for solidification
(2) Demoulding and maintaining
After 24 hours, the mold was disassembled and the cured physical model was removed. A single-layer model of the physical simulation reservoir that can match the high-speed layer is made.
The invention firstly tries to add high-purity superfine silicon carbide powder into a geophysical model for simulation, is used for seismic physical simulation, develops a new reservoir model high-speed layer matching manufacturing method, and is successfully applied to the manufacturing of the reservoir physical model.
When the model is built, firstly, parameters such as longitudinal and transverse wave speeds of a simulated target layer position and the like are determined according to a research target, then, the model is designed according to geological structure explanation, the geometric similarity ratio and the dynamic similarity ratio of the model are determined, and then, a proper material formula is selected for the target layer of a reservoir; after the formula is determined, a model is manufactured according to the model manufacturing step, the model is demoulded after being solidified, the model parameters of the layer are measured after the demould, and the physical simulation ultrasonic excitation experiment is carried out after the model meets the requirements.
ADVANTAGEOUS EFFECTS OF INVENTION
1. The longitudinal wave velocity of the new geophysical reservoir material can be adjusted between 2600m/s and 3250 m/s;
2. the shear wave velocity of the new geophysical reservoir material can be adjusted and matched between 1500m/s and 2300 m/s;
3. the new geophysical reservoir model has good penetrability and can obtain effective reflection signals.
Drawings
FIG. 1 is a diagram of the compressional and shear wave velocities of geophysical reservoir model materials. The diagram shows a longitudinal wave velocity trend chart of a geophysical reservoir model material, wherein the longitudinal wave velocity is gradually changed from 2600m/s to 3250m/s, and the transverse wave velocity is gradually changed from 1500m/s to 2300 m/s.
Detailed Description
The invention will be further explained with reference to the drawings.
In order to make the technical solutions and advantages of the present invention clearer, the following embodiments are used to clearly and completely describe the solutions of the present invention.
In the invention, a high-voltage pulse generator is used for exciting a pulse excitation ultrasonic emission probe with a high voltage pulse width of 1 microsecond, a sample small sample is pressed against the ultrasonic excitation probe after being measured for length, an ultrasonic receiving probe is pressed against the opposite side of the excitation probe (the small sample is arranged in the middle), the receiving probe outputs a waveform to an oscilloscope, the time from emission to reception is read, and the time is divided by the sample length to obtain the speed.
The following are materials and auxiliaries used in the examples:
superfine silicon carbide powder with the purity of 99 percent: 1200 mesh institute of metallurgy of China
Epoxy resin: e-51 tin-free resin plant
Epoxy curing agent: 2216 Guangzhou synthetic materials Ltd
Example 1:
first layer of physical model of certain area: reservoir target stratum simulation speed design Vp is 3250m/s Vs is 2300m/s
Material preparation
High-purity superfine silicon carbide powder 100
Epoxy resin 100
Epoxy hardener 50
Calculated according to the parts by weight.
Preparation of seismic physical model
(1) Adding epoxy resin into high-purity superfine silicon carbide powder and mixing;
(2) adding an epoxy resin curing agent into the mixture obtained in the step (1) and uniformly mixing;
(3) putting the mixed mixture (2) into a vacuumizing device for vacuumizing;
(4) pouring the vacuumized (3) into a mold.
Curing of the mold
(1) The vacuumed mixture is poured into a mold to wait for curing.
(2) Demoulding and maintaining
Example 2:
second layer of physical model of certain area: reservoir target layer simulation speed design Vp-3050 m/s Vs-2000 m/s
High-purity superfine silicon carbide powder 50
Epoxy resin 100
Epoxy hardener 50
Calculated according to the parts by weight.
Preparation of a seismic physical model and model curing the same as in example 1.
Example 3:
first layer of physical model of certain area: reservoir target stratum simulation speed design Vp is 2850m/s Vs is 1800m/s
High-purity superfine silicon carbide powder 30
Epoxy resin 100
Epoxy hardener 50
Calculated according to the parts by weight.
Preparation of a seismic physical model and model curing the same as in example 1.
Example 4:
second layer of physical model of certain area: reservoir target stratum simulation speed design Vp is 2750m/s Vs is 1700m/s
High-purity superfine silicon carbide powder 10
Epoxy resin 100
Epoxy hardener 50
Calculated according to the parts by weight.
Preparation of a seismic physical model and model curing the same as in example 1.
Application examples
The materials prepared in examples 1-4 were prepared as small samples and subjected to a speed test. The method comprises the steps of exciting a pulse excitation ultrasonic emission probe with a high voltage and a pulse width of 1 microsecond by using a high-voltage pulse generator, measuring the length of a sample small sample prepared in the embodiment 1-4, then supporting the sample small sample on the ultrasonic excitation probe, supporting an ultrasonic receiving probe on the opposite side of the excitation probe (with the small sample in between), outputting a waveform to an oscilloscope by the receiving probe, reading the time from emission to reception, and dividing the time by the length of the sample to obtain the speed. The results obtained are shown in table 1 below.
As can be seen from the data in Table 1, the error between the designed material and the actual measurement is very small, and the material can be well used as a reservoir model material for geophysical exploration and simulated seismic acquisition.
While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A simulated reservoir physical model material comprising:
100 parts by weight of epoxy resin;
40-100 parts of epoxy curing agent; and
10-100 parts of silicon carbide powder;
wherein the purity of the silicon micro powder is more than 95 percent, and the fineness is 500-1500 meshes.
2. The material of claim 1, wherein the epoxy resin is a solid epoxy resin of the BPA type.
3. The material of claim 1, wherein the curing agent is a modified amine curing agent.
4. The material of claim 3, wherein the curing agent is curing agent 2216.
5. The material of any of claims 1-4, wherein the curing agent is present in an amount of 50% of the amount of epoxy resin present.
6. The material of any one of claims 1-5, wherein the micro-powder is silicon carbide powder.
7. The material according to any one of claims 1-6, wherein the material has a longitudinal wave velocity between 2600m/s and 3250 m/s.
8. The material according to any one of claims 1-7, wherein the material has a shear wave velocity between 1500m/s and 2300 m/s.
9. A preparation method of a simulated reservoir physical model comprises the following steps: the seismic physical model is prepared by uniformly mixing the materials according to any one of the claims 1 to 8 according to the dosage and then pressing and curing.
10. The method according to claim 9, wherein the method specifically comprises:
1) adding the epoxy resin into the micro silicon powder and mixing together;
2) adding the epoxy resin curing agent into the mixture obtained in the step 1) and uniformly mixing;
3) putting the mixture obtained in the step 2) into vacuum-pumping equipment for vacuum-pumping;
4) pouring the vacuumized material obtained in the step 3) into a mold, and curing and molding;
thereby obtaining the material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011054530.6A CN114426755A (en) | 2020-09-29 | 2020-09-29 | Simulated reservoir physical model material and preparation method thereof |
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| CN202011054530.6A CN114426755A (en) | 2020-09-29 | 2020-09-29 | Simulated reservoir physical model material and preparation method thereof |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104250424A (en) * | 2013-06-26 | 2014-12-31 | 中国石油化工股份有限公司 | Titanium dioxide nanopowder modified epoxy resin earthquake physical model material and preparation method thereof |
| CN107640936A (en) * | 2016-07-20 | 2018-01-30 | 中国石油化工股份有限公司 | sandstone reservoir physical model material and preparation method thereof |
-
2020
- 2020-09-29 CN CN202011054530.6A patent/CN114426755A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104250424A (en) * | 2013-06-26 | 2014-12-31 | 中国石油化工股份有限公司 | Titanium dioxide nanopowder modified epoxy resin earthquake physical model material and preparation method thereof |
| CN107640936A (en) * | 2016-07-20 | 2018-01-30 | 中国石油化工股份有限公司 | sandstone reservoir physical model material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 裴宇;杨勤勇;赵群;马中高;刘卫华;: "硅微粉改性新型三维地震物理模型材料特性研究", 地球物理学进展, no. 01, pages 456 * |
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Application publication date: 20220503 |