CN102915665A - Coalbed methane earthquake physical model and making method thereof - Google Patents
Coalbed methane earthquake physical model and making method thereof Download PDFInfo
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- CN102915665A CN102915665A CN2012104224163A CN201210422416A CN102915665A CN 102915665 A CN102915665 A CN 102915665A CN 2012104224163 A CN2012104224163 A CN 2012104224163A CN 201210422416 A CN201210422416 A CN 201210422416A CN 102915665 A CN102915665 A CN 102915665A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 107
- 239000003245 coal Substances 0.000 claims abstract description 106
- 239000011435 rock Substances 0.000 claims abstract description 41
- 238000004088 simulation Methods 0.000 claims description 57
- 238000013341 scale-up Methods 0.000 claims description 36
- 239000003795 chemical substances by application Substances 0.000 claims description 32
- 239000003822 epoxy resin Substances 0.000 claims description 31
- 229920000647 polyepoxide Polymers 0.000 claims description 31
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 229920002379 silicone rubber Polymers 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 15
- 230000008439 repair process Effects 0.000 claims description 8
- 238000011160 research Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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- 238000001615 p wave Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
本发明提供煤层气地震物理模型的制作方法及煤层气地震物理模型，所述方法包括：确定煤层气地震物理模型的比例系数；根据所述煤层气地震物理模型的比例系数，制作煤层气地震物理模型的模具；将选择的围岩材料及模拟煤层材料浇注于所述煤层气地震物理模型的模具内；在浇注好的所述模拟煤层材料中制作煤层气富集区。所述煤层气地震物理模型包括：煤层气地震物理模型的模具，用于根据确定的煤层气地震物理模型的比例系数制作；围岩材料及模拟煤层材料，浇注于所述煤层气地震物理模型的模具内；煤层气富集区，位于浇注好的所述模拟煤层材料中。本发明具有如下的技术效果：能较真实地模拟野外实际地质情况，为实际煤层气储层研究及开采提供有力的指导。
The invention provides a method for making a coalbed methane seismic physical model and a coalbed methane seismic physical model. The method includes: determining the proportional coefficient of the coalbed methane seismic physical model; The mold of the model; the selected surrounding rock material and simulated coal seam material are poured into the mold of the coalbed methane seismic physical model; the coalbed methane enrichment area is made in the poured simulated coal seam material. The coalbed methane seismic physical model includes: a mold of the coalbed methane seismic physical model, which is used to make according to the scale coefficient of the determined coalbed methane seismic physical model; surrounding rock materials and simulated coal seam materials are poured into the In the mould; the coal bed gas enrichment area is located in the poured simulated coal seam material. The invention has the following technical effects: it can more realistically simulate the actual geological conditions in the field, and provide powerful guidance for the research and exploitation of actual coal bed gas reservoirs.
Description
Technical field
The present invention relates to the geophysical research field of oil-gas exploration and development, relate in particular to method for making and the coal-seam gas seismic physical model of coal-seam gas seismic physical model.
Background technology
Coalbed methane reservoir generally all is comprised of a plurality of thin layers, and p-wave impedance difference is little, and the crack very grows, and changes greatly to physical property characteristic in length and breadth, and the meticulous depiction in coal seam itself is just relatively more difficult; In addition, coal-seam gas is mainly composed with the unimolecule adsorbed state and is stored among the coal seam, coalbed methane reservoir is again a kind of hyposmosis, distortion dual media, have the characteristics such as nonuniformity is strong, anisotropy strong, complex pore structure, the rock physical property of conventional gas and oil reservoir and geophysical character can not be described the specific respone of coal seam reservoirs exactly, and this has brought very large difficulty for undoubtedly prediction, comprehensive evaluation and the exploitation of coal seam gas reservoir.
Geophysical techniques in the cbm exploration has been done many researchs both at home and abroad, and obtained some important achievements in research, for the further investigation in lower step has accumulated certain technical foundation.Qi Jinghua (1996) is from the derived mathematic(al) representation of coal seam reflection wave of geometric theory.Get coal output layer reflection wave and top, coal seam bottom boundary reflection coefficient, relevant as penetrating wavelet, the ripple two-way time in the coal seam, namely relevant with thickness of coal seam.Marroquo etc. (2003) have mainly utilized well-log information and P wave seismic data when the Fruidand coal seam seismic properties forecasting coal layer thickness of studying san juan basin and crack density.Thickness of coal seam is predicted with three dimensional seismic data and well-log information.Dong Shouhua etc. (2004) have designed Seismic-geologic Models according to geology, seismic data, have simulated in the situations such as coal seam disappearance, stripping mistake, bifurcated, merging the seismic properties such as echo amplitude, frequency and these attributes have been discussed simultaneously to the different coal Thickness sensitivity.Yang Ruizhao etc. (2005) will transversely stablize the earthquake multiattribute analytical technology that distributes is combined with vertically upper high-resolution well-log information, might predict the zone of enrichment of coal-seam gas.
Comparatively speaking, domestic coal-seam gas geophysical exploration technology research and comparison is scattered, integral body is in the research and probe stage, need the fundamental research of strengthening system, carry out the gordian technique test, realize the key breakthrough of coal-seam gas geophysical techniques, form as early as possible the geophysical techniques series that adapts to Coalbed Methane In China exploratory development geologic feature, serve and be applied to the Efficient Exploration exploitation of coal-seam gas.And the maximum characteristics of seismic physical model technology are to simulate more truly open-air actual geological condition, and studying and exploit for actual coalbed methane reservoir provides strong guidance.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: do not exist at present a kind of seismic physical model can simulate more truly open-air actual geological condition, studying and exploit for actual coalbed methane reservoir provides strong guidance.
Summary of the invention
The embodiment of the invention provides a kind of method for making and coal-seam gas seismic physical model of coal-seam gas seismic physical model, simulating more truly open-air actual geological condition, for actual coalbed methane reservoir research and exploitation provide strong guidance.
On the one hand, the embodiment of the invention provides a kind of method for making of coal-seam gas seismic physical model, and the method for making of described coal-seam gas seismic physical model comprises:
Determine the scale-up factor of coal-seam gas seismic physical model;
According to the scale-up factor of described coal-seam gas seismic physical model, make the mould of coal-seam gas seismic physical model;
Country rock material and the simulation coal seam material selected are cast in the mould of described coal-seam gas seismic physical model;
In the good described simulation coal seam material of cast, make the Enriching Coalbed Methane district.
Optionally, in an embodiment of the present invention, the scale-up factor of described definite coal-seam gas seismic physical model comprises: according to open-air actual geologic aspects, determine the scale-up factor of coal-seam gas seismic physical model; The scale-up factor of described coal-seam gas seismic physical model is included as: 1:5000.
Optionally, in an embodiment of the present invention, described country rock material and simulation coal seam material with selection is cast in the mould of described coal-seam gas seismic physical model, comprise: the country rock material selected and/or the simulation coal seam material mode by in layer is cast in the mould of described coal-seam gas seismic physical model: production order is for beginning from bottom to top layer, after this layer curing, repair after having built one deck, and then carry out the work of building of other one deck, carry out in such a manner the work of building on a series of stratum, in order to finish the making of described coal-seam gas seismic physical model; The described country rock material of selecting is: epoxy resin and hardening agent; The described simulation coal seam material of selecting is: epoxy resin, silicon rubber and hardening agent.
Optionally, in an embodiment of the present invention, the blending ratio of epoxy resin and hardening agent is 4.5:0.4 or 5:0.5 in the described country rock material; The blending ratio of epoxy resin, silicon rubber and hardening agent is 3:1:0.3 in the material of described simulation coal seam.
Optionally, in an embodiment of the present invention, the described Enriching Coalbed Methane district that in pouring into a mould good described simulation coal seam material, makes, comprise: fill or the mode in manual manufacture crack is made the Enriching Coalbed Methane district in the good described simulation coal seam material of cast with the material of low speed, then carry out the demoulding, finishing.
On the other hand, the embodiment of the invention provides a kind of coal-seam gas seismic physical model, and described coal-seam gas seismic physical model comprises:
The mould of coal-seam gas seismic physical model is used for making according to the scale-up factor of the coal-seam gas seismic physical model of determining;
Country rock material and simulation coal seam material are cast in the mould of described coal-seam gas seismic physical model;
The Enriching Coalbed Methane district is arranged in the good described simulation coal seam material of cast.
Optionally, in an embodiment of the present invention, the scale-up factor of described coal-seam gas seismic physical model is to determine according to open-air actual geologic aspects; The scale-up factor of described coal-seam gas seismic physical model is included as: 1:5000.
Optionally, in an embodiment of the present invention, described country rock material and simulation coal seam material, be cast in the mould of described coal-seam gas seismic physical model, comprise: the country rock material of selection and/or simulation coal seam material are cast in the mould of described coal-seam gas seismic physical model by mode in layer: production order is for beginning from bottom to top layer, after this layer curing, repair after having built one deck, and then carry out the work of building of other one deck, carry out in such a manner the work of building on a series of stratum, in order to finish the making of described coal-seam gas seismic physical model; The described country rock material of selecting is: epoxy resin and hardening agent; The described simulation coal seam material of selecting is: epoxy resin, silicon rubber and hardening agent.
Optionally, in an embodiment of the present invention, the blending ratio of epoxy resin and hardening agent is 4.5:0.4 or 5:0.5 in the described country rock material; The blending ratio of epoxy resin, silicon rubber and hardening agent is 3:1:0.3 in the material of described simulation coal seam.
Optionally, in an embodiment of the present invention, described Enriching Coalbed Methane district for filling with the material of low speed or the mode in manual manufacture crack completes, then carries out the demoulding, finishing in the good described simulation coal seam material of cast.
Technique scheme has following beneficial effect: because adopt the scale-up factor of determining the coal-seam gas seismic physical model; According to the scale-up factor of described coal-seam gas seismic physical model, make the mould of coal-seam gas seismic physical model; Country rock material and the simulation coal seam material selected are cast in the mould of described coal-seam gas seismic physical model; Make the technological means in Enriching Coalbed Methane district in the good described simulation coal seam material of cast, so have following technique effect: can simulate more truly open-air actual geological condition, studying and exploit for actual coalbed methane reservoir provides strong guidance.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the method for making process flow diagram of a kind of coal-seam gas seismic physical model of the embodiment of the invention;
Fig. 2 is a kind of coal-seam gas seismic physical model of embodiment of the invention structural representation;
Fig. 3 is the fabrication processing figure of application example coal-seam gas seismic physical model of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
As shown in Figure 1, be the method for making process flow diagram of a kind of coal-seam gas seismic physical model of the embodiment of the invention, the method for making of described coal-seam gas seismic physical model comprises:
101, determine the scale-up factor of coal-seam gas seismic physical model;
102, according to the scale-up factor of described coal-seam gas seismic physical model, make the mould of coal-seam gas seismic physical model;
103, country rock material and the simulation coal seam material of selecting is cast in the mould of described coal-seam gas seismic physical model;
104, in the good described simulation coal seam material of cast, make the Enriching Coalbed Methane district.
Optionally, the scale-up factor of described definite coal-seam gas seismic physical model comprises: according to open-air actual geologic aspects, determine the scale-up factor of coal-seam gas seismic physical model; The scale-up factor of described coal-seam gas seismic physical model is included as: 1:5000.
Optionally, described country rock material and simulation coal seam material with selection is cast in the mould of described coal-seam gas seismic physical model, comprise: the country rock material selected and/or the simulation coal seam material mode by in layer is cast in the mould of described coal-seam gas seismic physical model: production order is for beginning from bottom to top layer, after this layer curing, repair after having built one deck, and then carry out the work of building of other one deck, carry out in such a manner the work of building on a series of stratum, in order to finish the making of described coal-seam gas seismic physical model; The described country rock material of selecting is: epoxy resin and hardening agent; The described simulation coal seam material of selecting is: epoxy resin, silicon rubber and hardening agent.
Optionally, the blending ratio of epoxy resin and hardening agent is 4.5:0.4 or 5:0.5 in the described country rock material; The blending ratio of epoxy resin, silicon rubber and hardening agent is 3:1:0.3 in the material of described simulation coal seam.
Optionally, the described Enriching Coalbed Methane district that in pouring into a mould good described simulation coal seam material, makes, comprise: fill or the mode in manual manufacture crack is made the Enriching Coalbed Methane district in the good described simulation coal seam material of cast with the material of low speed, then carry out the demoulding, finishing.
Corresponding to said method embodiment, as shown in Figure 2, be a kind of coal-seam gas seismic physical model of embodiment of the invention structural representation, described coal-seam gas seismic physical model comprises:
The mould 21 of coal-seam gas seismic physical model is used for making according to the scale-up factor of the coal-seam gas seismic physical model of determining;
Country rock material 22 and simulation coal seam material 23 are cast in the mould 21 of described coal-seam gas seismic physical model;
Enriching Coalbed Methane district 24 is arranged in the good described simulation coal seam material 23 of cast.
Optionally, the scale-up factor of described coal-seam gas seismic physical model is to determine according to open-air actual geologic aspects; The scale-up factor of described coal-seam gas seismic physical model is included as: 1:5000.
Optionally, described country rock material and simulation coal seam material, be cast in the mould of described coal-seam gas seismic physical model, comprise: the country rock material of selection and/or simulation coal seam material are cast in the mould of described coal-seam gas seismic physical model by mode in layer: production order is for beginning from bottom to top layer, after this layer curing, repair after having built one deck, and then carry out the work of building of other one deck, carry out in such a manner the work of building on a series of stratum, in order to finish the making of described coal-seam gas seismic physical model; The described country rock material of selecting is: epoxy resin and hardening agent; The described simulation coal seam material of selecting is: epoxy resin, silicon rubber and hardening agent.
Optionally, the blending ratio of epoxy resin and hardening agent is 4.5:0.4 or 5:0.5 in the described country rock material; The blending ratio of epoxy resin, silicon rubber and hardening agent is 3:1:0.3 in the material of described simulation coal seam.
Optionally, described Enriching Coalbed Methane district for filling with the material of low speed or the mode in manual manufacture crack completes, then carries out the demoulding, finishing in the good described simulation coal seam material of cast.
Embodiment of the invention said method and device technique scheme have following beneficial effect: because adopt the scale-up factor of determining the coal-seam gas seismic physical model; According to the scale-up factor of described coal-seam gas seismic physical model, make the mould of coal-seam gas seismic physical model; Country rock material and the simulation coal seam material selected are cast in the mould of described coal-seam gas seismic physical model; Material is made the technological means in Enriching Coalbed Methane district in the good described simulation coal seam of cast, so have following technique effect: can simulate more truly open-air actual geological condition, studying and exploit for actual coalbed methane reservoir provides strong guidance.
One of purpose of application example of the present invention is to provide a kind of method for making of coal-seam gas seismic physical model, another purpose is to provide according to described method makes the coal-seam gas seismic physical model that obtains meeting designing requirement, analyze with the coal-seam gas seismic response of reality, a kind of new approaches of studying coalbed gas seismic exploration are provided.
Several problems below the laboratory can run into when making up making coal-seam gas physical model, the one, the choosing of the ratio of model, owing to finding the very thin thickness in coal seam in the actual recovery process, generally about several meters, tens meters coal seams to twenties meters left and right thicknesses just belong to huge thick seam, the buried depth in coal seam at 1000m in the majority between the 2000m, be compared to depth of burial, it is too small that thickness of coal seam seems, the laboratory is when making up physical model, and how choosing the scale-up factor that adapts to two kinds of sizes is a main difficult problem.Next is choosing of simulation coal seam material, because the coal seam is the medium of low-density, low velocity, be difficult to find suitable material to simulate, laboratory worker has been determined the material in suitable simulation coal seam by the mixing match of a large amount of experimental works according to different materials.The 3rd is the simulation in Enriching Coalbed Methane district, although the coal seam is the reservoir of coal-seam gas, but not all coal seam all has extraction value, therefore only find the Enriching Coalbed Methane zone just to have meaning, the Enriching Coalbed Methane district is that with the difference in coal seam the crack relatively grows on earthquake rock physics feature, speed and density decrease to some degree can be from two aspects so utilize physical model to simulate the Enriching Coalbed Methane district: 1, with the Material Filling coal seam of low velocity more; 2, portray the crack in the coal seam that makes.Brought simultaneously the problem of two aspects: the choosing of material of also wanting low speed than the design coal seam, and how cracks in coal seam is made just and is more tallied with the actual situation.
In above-mentioned three problems mentioning, what primarily solve is determining of model space scale-up factor, if it is too small that the scale-up factor ratio of open-air physical size (the physical model yardstick with) is chosen, and because thickness of coal seam is too thin, the making on physical model is difficult to realize, and is excessive if scale-up factor is chosen, the one, the volume phase strain of physical model is large, consume material increases and the duration increases, and the 2nd, can impact choosing of speed proportional, increase the difficulty of choosing suitable speed material.By experiment contrast and theoretical calculating, the scale-up factor of final definite space scale selects 1:5000 the most suitable, under this ratio, 1mm in the physical model represents the 5m in the reality, like this according to the variation in thickness in coal seam, thickness in physical model is to change between 1mm ~ 4mm, and physical model can realize that thickness is the making precision of 1mm in making.
The coal seam feature is different from other rock stratum, simulate low close, the low speed characteristics in coal seam certain difficulty is arranged in implementation process, by epoxy resin, silicon rubber and hardening agent being carried out the proportioning test of multiple ratio, and the ratio of determining at last epoxy resin, silicon rubber and hardening agent according to requirement of the present invention is conducive to simulate the coal seam when 3:1:0.3.Be simulation Enriching Coalbed Methane district feature, choosing respectively several zones in certain which floor coal seam of made simulates as the target area, the one, with the water glass that is lower than coal seam speed some zone is filled, the 2nd, utilize icking tool that several zones are delineated, the making people is the crack, use respectively the blade of two kinds of different in width (0.5mm and 0.1mm) that the coal seam is cut, make the crack.
As shown in Figure 3, the fabrication processing figure for application example coal-seam gas seismic physical model of the present invention specifically comprises:
1, field geology overview
Ordos Basin 2000m surpasses 1 * 1012m3 with shallow Methane Resources Quantity In Coal Seams, wherein typical with the Hancheng block, this block is grown 13 layers of coal, take the 11# of 3#, 5# coal seam and the Taiyuan group of Shanxi group as main gas bearing reservoir, contain structure of coal and present east northeast～Nan Xi to spread, the total structure form is the uniclinal structure that northwest (NW) is inclined to, northwards inclines and do not have, and simulation region is elected 4 kilometers of things as, 5 kilometers in north and south.
2, design of physical model and making
1) scale-up factor determines
According to open-air actual geologic aspects, the scale-up factor of final definite space scale selects 1:5000 the most suitable, under this ratio, 1mm in the physical model represents the 5m in the reality, like this according to the variation in thickness in coal seam, thickness in physical model is to change between 1mm ~ 4mm, and actual geology region area narrows down in 100 * 80cm scope.
2) physical model Mold Making
According to planar distribution and the structural attitude in country rock stratum and the coal seam of reality, draw the mould fabrication drawing according to the scale-up factor of design, then make mould, architectonic like this form just can be controlled by the mould of in advance making.The mould that needs according to modelling can be made holotype and negative norm, makes directly to obtain required form at negative norm, and also need do a negative norm during with holotype again.
3) material is selected and proportioning
For analogue formation, epoxy resin, silicon rubber and hardening agent are best making materials, fully mix down because this different materials is can be more liquid, and the curing molding over time of the effect by hardening agent, and stable performance after solidifying.By carrying out the proportioning test of multiple ratio, the ratio of epoxy resin, silicon rubber and hardening agent is conducive to simulate the coal seam when 3:1:0.3.Because the coal seam has low speed, hangs down physical properties of rock feature close, high wave impedance, in the process in simulation coal seam, carried out lot of experiments, by carrying out the proportioning of multiple ratio, determine that the ratio of epoxy resin, silicon rubber and hardening agent when 3:1:0.3, is conducive to simulate the coal seam.For choosing then than being easier to of the material that is used for simulation country rock stratum, the mixing of selecting epoxy resin and hardening agent to carry out different proportion gets final product, and having selected epoxy resin and hardening agent in the modelling is that two groups of blending ratios of 4.5:0.4 and 5:0.5 are carried out the simulation on country rock stratum.
4) modelling
The material that proportioning is good is poured in design and the mould made according to designing requirement, and production order is for beginning from bottom to top layer, repairs after this layer curing after having built one deck, then its form is measured; And then carry out the work of building of other one deck, carry out in such a manner the work of building on a series of stratum, until modelling is complete.
5) the coal seam enrichment region is made
In the coal seam of building, choose the specific region and carry out the making in Enriching Coalbed Methane district.In the manufacturing process of model in the 5# coal seam 5 zones are filled with the material of low speed more or simulate in the manual manufacture crack, and wherein the manufacturing crack is cut with the blades of two kinds of different in width (0.5mm and 0.1mm) in 3 zones to the coal seam; Other 2 regional water glass-filleds.Also made a zone with same method equally in the 3# coal seam: blade width 0.1mm, fissure direction are east-west direction, totally 37 cuttves, and average every 1.7mm has a crack.
After above-mentioned work is finished, need to once repair model comprehensively, and to model not the demoulding partly carry out the demoulding and process, the configuration of model is done last laser form test, so far the coal-seam gas physical property completes.
The coal-seam gas physical model that application example utilization of the present invention is made can successfully be simulated the seismic response features of coal-seam gas.
Above-described embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is the specific embodiment of the present invention; the protection domain that is not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for making of a coal-seam gas seismic physical model is characterized in that, the method for making of described coal-seam gas seismic physical model comprises:
Determine the scale-up factor of coal-seam gas seismic physical model;
According to the scale-up factor of described coal-seam gas seismic physical model, make the mould of coal-seam gas seismic physical model;
Country rock material and the simulation coal seam material selected are cast in the mould of described coal-seam gas seismic physical model;
In the good described simulation coal seam material of cast, make the Enriching Coalbed Methane district.
2. the method for making of coal-seam gas seismic physical model as claimed in claim 1 is characterized in that, the scale-up factor of described definite coal-seam gas seismic physical model comprises:
According to open-air actual geologic aspects, determine the scale-up factor of coal-seam gas seismic physical model; The scale-up factor of described coal-seam gas seismic physical model is included as: 1:5000.
3. the method for making of coal-seam gas seismic physical model as claimed in claim 1 is characterized in that, described country rock material and the simulation coal seam material of selecting is cast in the mould of described coal-seam gas seismic physical model, comprising:
The country rock material selected and/or the simulation coal seam material mode by in layer is cast in the mould of described coal-seam gas seismic physical model: production order is for beginning from bottom to top layer, after this layer curing, repair after having built one deck, and then carry out the work of building of other one deck, carry out in such a manner the work of building on a series of stratum, in order to finish the making of described coal-seam gas seismic physical model;
The described country rock material of selecting is: epoxy resin and hardening agent; The described simulation coal seam material of selecting is: epoxy resin, silicon rubber and hardening agent.
4. the method for making of coal-seam gas seismic physical model as claimed in claim 3 is characterized in that, the blending ratio of epoxy resin and hardening agent is 4.5:0.4 or 5:0.5 in the described country rock material; The blending ratio of epoxy resin, silicon rubber and hardening agent is 3:1:0.3 in the material of described simulation coal seam.
5. the method for making of coal-seam gas seismic physical model as claimed in claim 1 is characterized in that, describedly makes the Enriching Coalbed Methane district in the good described simulation coal seam material of cast, comprising:
Fill or the mode in manual manufacture crack is made the Enriching Coalbed Methane district in the good described simulation coal seam material of cast with the material of low speed, then carry out the demoulding, finishing.
6. a coal-seam gas seismic physical model is characterized in that, described coal-seam gas seismic physical model comprises:
The mould of coal-seam gas seismic physical model is used for making according to the scale-up factor of the coal-seam gas seismic physical model of determining;
Country rock material and simulation coal seam material are cast in the mould of described coal-seam gas seismic physical model;
The Enriching Coalbed Methane district is arranged in the good described simulation coal seam material of cast.
7. coal-seam gas seismic physical model as claimed in claim 6 is characterized in that, the scale-up factor of described coal-seam gas seismic physical model is to determine according to open-air actual geologic aspects; The scale-up factor of described coal-seam gas seismic physical model is included as: 1:5000.
8. coal-seam gas seismic physical model as claimed in claim 6 is characterized in that, described country rock material and simulation coal seam material are cast in the mould of described coal-seam gas seismic physical model, comprising:
The country rock material of selecting and/or simulation coal seam material are cast in the mould of described coal-seam gas seismic physical model by mode in layer: production order is for beginning from bottom to top layer, after this layer curing, repair after having built one deck, and then carry out the work of building of other one deck, carry out in such a manner the work of building on a series of stratum, in order to finish the making of described coal-seam gas seismic physical model;
The described country rock material of selecting is: epoxy resin and hardening agent; The described simulation coal seam material of selecting is: epoxy resin, silicon rubber and hardening agent.
9. coal-seam gas seismic physical model as claimed in claim 8 is characterized in that, the blending ratio of epoxy resin and hardening agent is 4.5:0.4 or 5:0.5 in the described country rock material; The blending ratio of epoxy resin, silicon rubber and hardening agent is 3:1:0.3 in the material of described simulation coal seam.
10. coal-seam gas seismic physical model as claimed in claim 6, it is characterized in that, described Enriching Coalbed Methane district is for filling with the material of low speed or the mode in manual manufacture crack completes in the good described simulation coal seam material of cast, then carry out the demoulding, finishing.
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| CN105489099A (en) * | 2016-01-22 | 2016-04-13 | 中国石油天然气集团公司 | Fracture reservoir seismic physical model and preparation method thereof |
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