CN107121314A - Compact oil reservoir flat plate model preparation method with microcrack - Google Patents
Compact oil reservoir flat plate model preparation method with microcrack Download PDFInfo
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- CN107121314A CN107121314A CN201610102729.9A CN201610102729A CN107121314A CN 107121314 A CN107121314 A CN 107121314A CN 201610102729 A CN201610102729 A CN 201610102729A CN 107121314 A CN107121314 A CN 107121314A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000011521 glass Substances 0.000 claims abstract description 61
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 36
- 238000005520 cutting process Methods 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 230000035699 permeability Effects 0.000 claims description 44
- 238000011049 filling Methods 0.000 claims description 12
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 8
- 239000011148 porous material Substances 0.000 claims description 8
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 238000005498 polishing Methods 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 3
- 238000009738 saturating Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 239000004005 microsphere Substances 0.000 claims description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 19
- 238000011161 development Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 8
- 238000004088 simulation Methods 0.000 description 8
- 238000000605 extraction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000001384 succinic acid Substances 0.000 description 3
- 244000137852 Petrea volubilis Species 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005325 percolation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
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- Life Sciences & Earth Sciences (AREA)
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of compact oil reservoir flat plate model preparation method with microcrack, comprises the following steps：Step 1：Square cutting is carried out on the cropping sandstone of target reservoir, flat board cropping sandstone model is obtained；Step 2：Drilled on flat board cropping sandstone model, pressure measurement sample point is set in hole；Step 3：According to the microcrack distribution arrangement of target reservoir, groove is cut on flat board cropping sandstone model；Step 4：Glass microballoon is chosen, glass microballoon is filled with being compacted in groove；Step 5：Pressure measurement sample tap is set on pressure measurement sample point, then seal plate cropping sandstone model.
Description
Technical field
This disclosure relates to unconventional fine and close oil-gas field development experiment field, the more particularly to densification with microcrack
Oil reservoir flat plate model preparation method.
Background technology
Fine and close oil is a kind of non-conventional oil resource, with matrix is fine and close, hyposmosis the characteristics of, difficulties in exploration
Greatly.In general, the upper limit of compact oil reservoir reservoir permeability is 1 × 10-3μm2Or 3 × 10-3μm2, most very much not
More than 5 × 10-3μm2.The country such as the U.S., Russia, Canada successfully develops fine and close oil, such as U.S.
The fast development of shale gas, has driven fine and close oily exploitation.Because fine and close oily resource potential (is estimated beyond expection
Calculate 388.23 hundred million tons of stock number), production technique makes a breakthrough, and the U.S. turns into the most country of fine and close oil exploitation.
At present, the exploitation of the fine and close oil in the U.S. is concentrated mainly on Ba Ken (Bakken), hawk beach (Eagle Ford) and bar
In the band of interior spy (Barnett) Shale Region, yearly rate-oil production is about 36,000,000 tons.Wherein, Williston basin Bakken
Group is the Typical Representative of fine and close oil exploitation.
China's compact oil reservoir exploitation is still in the starting stage, and the understanding for compact oil reservoir development process is remained
Part is not known.Because permeability is low, matrix is fine and close, compact oil reservoir is typically without natural production capacity, it is necessary to carry out
Fracturing reform just possesses the economic exploitation value.However, crack scale and draining face due to artificial fracturing crack
Product has limitation, causes initial productivity after pressure break high, and soon, oil field production stable yields is difficult for later stage production decline.
The quality of compact oil reservoir development effectiveness, is heavily dependent on the development degree of microcrack in matrix.
At present during compact oil reservoir exploitation physical analogy, microcrack is often ignored, and this can to simulate effect
Compact oil reservoir development process can not truly be reflected, compact oil reservoir development effectiveness is result in by underestimation.It is actual
On, the presence of microcrack causes the percolation ability of compact oil reservoir in itself to greatly promote, and fine fisssure gap space into
To link up effective bridge of matrix and man-made fracture so that compact oil reservoir is developed into possibility.This is accomplished by
Carry out during physical analogy, form a kind of preparation method of microcrack, take into full account the development journey of microcrack
Degree, means are provided for compact oil reservoir exploitation physical analogy.
Column rock core is mainly pressed off into half section by consideration of the current physical analogy process to microcrack from centre
Semicircle core column, then pair cross-section carry out dedusting, after etching processing, at section on pad strip inertia
Material, to simulate different fracture widths.Finally, by two pieces of semicolumn rock core attaching and compacting (patents
CN201510004960.X).This method is limited in that the density that can not simulate microcrack, orientation etc.,
Microcrack has randomness.In addition, also a kind of analogy method of typical crack is position corresponding in steel plate
Coat paraffin, then at high temperature by it is paraffin melting come simulation fracture (patent CN201110187196.6).This
Oil reservoir rock property can not be simulated by planting being limited in that for method, be differed greatly with reservoir condition.In addition, this
The method of kind is also difficult to simulate microcrack.
The content of the invention
The disclosure proposes the densification oil with microcrack used in a kind of compact oil reservoir exploitation physical simulation experiment
Flat plate model preparation method is hidden, the compact oil reservoir flat plate model with microcrack made by this method can
To simulate influence of the microcrack for permeability, for compact oil reservoir development process effective simulation provide with reference to according to
According to.
The disclosure uses solution below：
A kind of compact oil reservoir flat plate model preparation method with microcrack, comprises the following steps：
Step 1：Square cutting is carried out on the cropping sandstone of target reservoir, flat board cropping sandstone model is obtained；
Step 2：Drilled on the flat board cropping sandstone model, pressure measurement sample point is set in hole；
Step 3：According to the microcrack distribution arrangement of target reservoir, cut on the flat board cropping sandstone model
Groove；
Step 4：Glass microballoon is chosen, the glass microballoon is filled with being compacted in the groove；
Step 5：Pressure measurement sample tap is set on the pressure measurement sample point, the flat board cropping sandstone is then sealed
Model.
Preferably, following steps are performed before the step 1：
At least two pieces samples are drilled through on the cropping sandstone of the target reservoir, oozing for every piece of sample is measured respectively
Saturating rate and porosity.
Preferably, the step 2 also includes the surface of the polishing flat board cropping sandstone model.
Preferably, the groove is rectangle.
Preferably, the step 3 also includes drying the flat board cropping sandstone model.
Preferably, the step 4 also includes choosing quality m first1Glass microballoon, filling the groove
Afterwards, remaining glass microballoon quality m is recorded2。
Preferably, the flat board is poured into a mould with the mixture of epoxy resin, phthalic acid and succinic acid to appear sand
Rock model, to be sealed.
Preferably, methods described is further comprising the steps of：
The permeability of the compact oil reservoir flat plate model with microcrack is measured by the pressure measurement sample tap；
The permeability of the cropping sandstone of the target reservoir is measured, and
Compare the permeability of compact oil reservoir flat plate model with microcrack and appearing for the target reservoir
The permeability of sandstone.
Preferably, methods described is further comprising the steps of：
The glass microballoons different from the particle size of glass microspheres in the step 4 are chosen, filling is with compacting described
In groove.
Preferably, the radius of the glass microballoon is determined by below equation：
Wherein,
V1=a × b × c
V=V1-V2
V2=m/ ρ
Wherein, r1For the radius of the glass microballoon, K is the permeability for the target reservoir cropping sandstone estimated,
The groove is rectangle, and V is the pore volume of the groove after filling glass microballoon, V1For the ditch
The volume of groove, a is the length of the groove, and b is the width of the groove, and c is the depth of the groove,
V2For the volume for the glass microballoon for being filled into the groove, m is the matter for the glass microballoon for being filled into the groove
Amount, ρ is the density of glass microballoon.
The beneficial effect of the disclosure is that the compact oil reservoir flat plate model with microcrack can be being made, passed through
The model, can be with the direction of comprehensive simulation microcrack, density and permeability to tight sand model permeability
Influence, technological means is provided for the simulation of compact oil reservoir microcrack.
Brief description of the drawings
By the way that disclosure exemplary embodiment is described in more detail with reference to accompanying drawing, the disclosure it is above-mentioned with
And other purposes, feature and advantage will be apparent, wherein, in disclosure exemplary embodiment,
Identical reference number typically represents same parts.
Fig. 1 shows the compact oil reservoir flat plate model preparation method with microcrack according to exemplary embodiment
Flow chart；
Fig. 2 is shown to be shown according to the flat board cropping sandstone model for being provided with pressure measurement sample point of exemplary embodiment
It is intended to；
Fig. 3 shows the flat board cropping sandstone model schematic after the cutting microcrack according to exemplary embodiment；
Fig. 4 shows the T-shaped compactor schematic diagram according to exemplary embodiment；And
Fig. 5 shows the glass microballoon intergranular hole relation schematic diagram according to exemplary embodiment.
Embodiment
Preferred embodiment of the present disclosure is more fully described below with reference to accompanying drawings.Although showing this in accompanying drawing
Disclosed preferred embodiment, however, it is to be appreciated that may be realized in various forms the disclosure without should be by here
The embodiment of elaboration is limited.On the contrary, these embodiments are provided so that the disclosure is more thorough and complete,
And the scope of the present disclosure can intactly be conveyed to those skilled in the art.
As shown in figure 1, according to the compact oil reservoir flat plate model making side with microcrack of exemplary embodiment
Method comprises the following steps：
Step 1：Make flat board cropping sandstone model.Square cutting is carried out on the cropping sandstone of target reservoir,
Obtain flat board cropping sandstone model.
Preferably, before flat board cropping sandstone model is made, in advance in the sand of appearing of target reservoir
At least two pieces samples are drilled through on rock, the permeability and porosity of every piece of sample are measured respectively.When each sample it
Between permeability and porosity relative deviation it is smaller when, illustrate permeability and the hole of selected cropping sandstone
Porosity is more uniform, is adapted to make flat board cropping sandstone model.Generally, three pieces of samples can be drilled through to enter
Row measurement.The relative deviation of permeability and porosity less than or equal to 5% to be preferred.
Preferably, the surface of flat board cropping sandstone model can be polished, with flat surface.
Preferably, the orientation polishing such as emery wheel, sand paper surface can be used.
Step 2：Pressure measurement sample point is set.Drilled on flat board cropping sandstone model, set pressure measurement to take in hole
Sampling point.
Step 3：Cut microcrack.According to the microcrack distribution arrangement of target reservoir, in flat board cropping sandstone mould
Groove is cut in type, for simulating microcrack.
It is at present to select Mini-railway cutting machine to cut groove more.Because the cutting blade of cutting machine is limited, one
As cut rectangular grooves.Preferably, the flat board cropping sandstone model is dried after cutting terminates, so as to
Next step is performed as early as possible.
Step 4：Filling and compacting microcrack.Glass microballoon is chosen, glass microballoon is filled with being compacted in groove
It is interior.
Preferably, in order that glass microballoon is completely filled with groove, glass constantly can be compacted in stowing operation
Microballon.The quality of glass microballoon being filled in groove is determined for convenience, and quality m can be chosen first1's
Glass microballoon, after filling groove, records remaining glass microballoon quality m2, then it is filled in groove
The quality m of glass microballoon is equal to m1-m2。
Step 5：Pressure measurement sample tap, seal plate cropping sandstone model are set.Set and survey on pressure measurement sample point
Sample tap is pressed, then seal plate cropping sandstone model, obtain the compact oil reservoir flat plate model with microcrack.
The effect of sealing model is protection model surface, prevents from wearing and tearing or damages.
Preferably, appeared with the mixture pouring plate of epoxy resin, phthalic acid and succinic acid
Sandstone gangne, to be sealed.Model can be poured into a mould in a mold, to cause epoxy resin uniformly to wrap up
Model.
Preferably, for effective simulation of implementation model microcrack, methods described also includes following step
Suddenly：
The permeability of the compact oil reservoir flat plate model with microcrack is measured by pressure measurement sample tap；
The permeability of the cropping sandstone of target reservoir is measured, and
Compare the permeability of the compact oil reservoir flat plate model with microcrack and the cropping sandstone of target reservoir oozes
Saturating rate.
Taken it is possible, firstly, to choose two pressure measurement in the flat board cropping sandstone model with microcrack of good seal
Sample mouthful, one of pressure measurement sample tap is sampled as injection sample tap, another pressure measurement sample tap as extraction
Mouthful, measurement model permeability.Then the permeability of the cropping sandstone of target reservoir is measured, generally,
Cropping sandstone sample can be selected to measure.Finally, the permeability measured in the case of two kinds is compared：If
The two relatively illustrates that model preferably simulates the microcrack situation of actual sandstone；If the two deviation
It is larger, illustrate that the simulation effect of microcrack is not good, the particle diameter of glass microballoon can be changed, groove is refilled,
Until the permeability and the permeability of target reservoir cropping sandstone of the compact oil reservoir flat plate model with microcrack connect
Closely.
Preferably, the radius of glass microballoon used in being determined by below equation (1-1)：
Wherein,
V1=a × b × c
V=V1-V2
V2=m/ ρ
Wherein, r1For the radius of glass microballoon, K is the permeability for the target reservoir cropping sandstone estimated, fine fisssure
Stitch as rectangular grooves, V is the pore volume of the microcrack after filling glass microballoon, V1For the volume of groove,
A is the length of groove, and b is the width of groove, and c is the depth of groove, V2It is micro- for the glass that is filled into groove
The volume of pearl, m is the quality for the glass microballoon for being filled into groove, and ρ is the density of glass microballoon.
The derivation of above-mentioned formula is explained in detailed below：
(1) calculating process of the apparent porosity of microcrack is as follows：
Channel volume V1It can be expressed as：
V1=a × b × c is 1.
Wherein, groove is rectangle, and a is trench length；B is groove width, and c is gash depth.
Filling glass microballoon quality m be：
M=m1-m2②
Wherein, m1To choose the gross mass of glass microballoon, m2For the quality of remaining glass microballoon.
According to the density of glass microballoon, the glass microballoon volume V for being filled into groove is calculated2：
V2=m/ ρ are 3.
Wherein, ρ is the density of glass microballoon.
The pore volume V for obtaining filling the microcrack after glass microballoon 1. and 3. can be calculated by formula：
V=V1-V2④
The apparent porosity φ for obtaining microcrack 1. and 4. can be calculated by formula：
φ=V/V1× 100% 5.
(2) calculating process of the pore radius of microcrack is as follows：
Assuming that glass microballoon is that uniform accumulation is formed in groove, then intergranular pore relation is as shown in Figure 5.According to
Fig. 5 schematic diagram, can calculate and obtain intergranular pore radius r：
⑥
Wherein, r1For the radius of glass microballoon.
(3) calculating process of microcrack permeability is as follows：
Permeability K ' after microcrack filling glass microballon is：
⑦
Wherein, τ is tortuosity, and φ is the apparent porosity of microcrack, and r is pore radius.
In the case where not considering porosity communication tortuosity (i.e. τ=1), fine fisssure 5. and 7. can be obtained with reference to formula
Stitch permeability K '：
⑧
From formula 8., if the permeability for estimating target reservoir cropping sandstone is K, then when according to the above
Formula (1-1) selects the radius r of glass microballoon1When, the permeability of the microcrack of simulation by with target reservoir
Cropping sandstone is closest.In practical operation, those skilled in the art can based on had experience or its
The permeability that his related data estimates target reservoir cropping sandstone is K.
Using example
Following step is included according to the compact oil reservoir flat plate model preparation method with microcrack of exemplary embodiment
Suddenly：
(1) flat board cropping sandstone model is made, pressure measurement sample point is set
In the exemplary embodiment, compact oil reservoir flat board cropping sandstone model is taken from close with target reservoir property
Cropping sandstone.After selected cropping sandstone, cropping sandstone different parts are drilled through, 3 pieces of samples are obtained.To 3
Block sample is carried out after ends cutting, and it is dried into more than 24 hours with standby in 100 DEG C of insulating boxs.Dry
Afterwards, the core permeability and porosity of 3 pieces of samples are determined, when the core permeability and hole of 3 pieces of samples
When spending relative deviation less than 5%, show that cropping sandstone meets the condition for making model.
Square cutting is carried out on qualified cropping sandstone, acquisition size is 40cm × 40cm × 2.7cm flat board
Cropping sandstone model.Then, sand paper polishing, smooth model surface are oriented to model surface.Next,
Drilled on model, arrange pressure measurement sample point.Pressure measurement sample point can need to select according to physical analogy, show
In example property embodiment, 36 pressure measurement sample points are distributed on model, for the pressure distribution in monitoring model or
Sampling.Fig. 2 shows the flat board cropping sandstone model for being provided with pressure measurement sample point according to exemplary embodiment,
Stain therein represents pressure measurement sample point.
(2) microcrack is cut
First, according to target reservoir microcrack distribution arrangement, fine fisssure is delineated with marking pen on cropping sandstone model
The position and direction of seam.In the exemplary embodiment, by taking the development of local microcrack, 45 ° of directions as an example.So
Afterwards, model is fixed on below Mini-railway cutting machine, according to the angle adjustment cutting machine position of microcrack,
It is uniform to advance downwardly cutting blade, form 6cm × 0.5cm × 1.0cm rectangular grooves.In cutting process,
Landwaste in groove can be blown off with 0.1MPa nitrogen at any time.Finally, model is placed on 100 DEG C of constant temperature
Dry, after 24 hours, take out stand-by in case.Cut the flat board cropping sandstone model schematic after microcrack such as
Shown in Fig. 3.
(3) filling and compacting microcrack
First, the glass microballoon for choosing 100 mesh is standby, weighs glass microballoon quality m1.Then, by glass
Microballon is poured slowly into the groove of flat board cropping sandstone model, until filling groove a quarter volume；Then,
With T-shaped compactor (as shown in Figure 4) is made by oneself, the glass microballoon in groove is compacted downwards, at this
During, continue to pour into glass microballoon and continue compacting, until being completely filled with the glass microballoon of compacting in groove
Untill, record remaining glass microballoon quality m2。
The T-shaped compactor schematic diagram of Fig. 4 display self-controls, it includes depression bar 1-1, support 1-2, spring 1-3
With press strip 1-4.Wherein, press strip 1-4 is used for the glass microballoon being compacted in groove, can be according to the chi for cutting groove
It is very little to change.
(4) pressure measurement sample tap, seal plate cropping sandstone model are set
Pressure measurement sample tap is installed on the pressure measurement sample point 1-16 of the flat board cropping sandstone model with microcrack,
Joint is such as measured, then places the flat board cropping sandstone model with microcrack in a mold, into mould
The mixture of High temperature epoxy resinses, phthalic acid and succinic acid is poured into a mould, model is sealed.It is to be mixed
After thing cooling, model is removed from the molds, model surface is sealed.
After the flat board cropping sandstone model with microcrack is made according to above step, it can be taken by pressure measurement
The permeability of flat board cropping sandstone model of the sample mouthful measurement with microcrack.In the exemplary embodiment, pouring
Note in the flat board cropping sandstone model with microcrack of good seal (as shown in Figure 3), choose two pressure measurement and take
Sample mouthful, one of pressure measurement sample tap is connected to nitrogen cylinder, is used as injection sample tap, another pressure measurement sampling
Mouth is connected to gas gauge, is used as extraction sample tap, measurement model permeability.
The permeability measured is compared with the sample core permeability measured in above-mentioned steps (1), can be true
Determine influence of the microcrack for model permeability.Furthermore it is possible to select different pressure measurement sample taps as injection
Sample tap and extraction sample tap, determine the influence of microcrack orientation and density to model permeability.For example,
Inject sample tap it is constant in the case of, select respectively pressure measurement sample point 3,4,5,6,7,8,9,10,11,
12, as extraction sample tap, can simulate influence of the microcrack orientation to model permeability.In injection sample tap
In the case of constant, pressure measurement sample point 13,14,15,16 is selected respectively as extraction sample tap, can be with mould
Intend influence of the microcrack density to model permeability.
Above-mentioned technical proposal is a kind of embodiment of the present invention, for those skilled in the art,
On the basis of the invention discloses application process and principle, it is easy to make various types of improvement or deformation,
The method described by above-mentioned specific embodiment of the invention is not limited solely to, therefore previously described mode is excellent
Choosing, and not restrictive meaning.
Claims (10)
1. a kind of compact oil reservoir flat plate model preparation method with microcrack, comprises the following steps：
Step 1：Square cutting is carried out on the cropping sandstone of target reservoir, flat board cropping sandstone model is obtained；
Step 2：Drilled on the flat board cropping sandstone model, pressure measurement sample point is set in hole；
Step 3：According to the microcrack distribution arrangement of target reservoir, cut on the flat board cropping sandstone model
Groove；
Step 4：Glass microballoon is chosen, the glass microballoon is filled with being compacted in the groove；
Step 5：Pressure measurement sample tap is set on the pressure measurement sample point, the flat board cropping sandstone is then sealed
Model.
2. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, wherein
Following steps are performed before the step 1：
At least two pieces samples are drilled through on the cropping sandstone of the target reservoir, oozing for every piece of sample is measured respectively
Saturating rate and porosity.
3. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, wherein
The step 2 also includes the surface of the polishing flat board cropping sandstone model.
4. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, wherein
The groove is rectangle.
5. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, wherein
The step 3 also includes drying the flat board cropping sandstone model.
6. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, wherein
The step 4 also includes choosing quality m first1Glass microballoon, after the groove is filled, record is surplus
Remaining glass microballoon quality m2。
7. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, wherein
The flat board cropping sandstone model is poured into a mould with the mixture of epoxy resin, phthalic acid and succinic acid, so as to
Sealed.
8. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, is also wrapped
Include following steps：
The permeability of the compact oil reservoir flat plate model with microcrack is measured by the pressure measurement sample tap；
The permeability of the cropping sandstone of the target reservoir is measured, and
Compare the permeability of compact oil reservoir flat plate model with microcrack and appearing for the target reservoir
The permeability of sandstone.
9. the compact oil reservoir flat plate model preparation method according to claim 8 with microcrack, is also wrapped
Include following steps：
The glass microballoons different from the particle size of glass microspheres in the step 4 are chosen, refills and exists with compacting
In the groove.
10. the compact oil reservoir flat plate model preparation method according to claim 1 with microcrack, its
In the radius of the glass microballoon is determined by below equation：
<mrow>
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<mi>r</mi>
<mn>1</mn>
</msub>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mrow>
<msqrt>
<mn>3</mn>
</msqrt>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
<mo>&CenterDot;</mo>
<msqrt>
<mfrac>
<mrow>
<mn>32</mn>
<msub>
<mi>KV</mi>
<mn>1</mn>
</msub>
</mrow>
<mi>V</mi>
</mfrac>
</msqrt>
</mrow>
Wherein,
V1=a × b × c
V=V1-V2
V2=m/ ρ
Wherein, r1For the radius of the glass microballoon, K is the permeability for the target reservoir cropping sandstone estimated,
The groove is rectangle, and V is the pore volume of the groove after filling glass microballoon, V1For the ditch
The volume of groove, a is the length of the groove, and b is the width of the groove, and c is the depth of the groove,
V2For the volume for the glass microballoon for being filled into the groove, m is the matter for the glass microballoon for being filled into the groove
Amount, ρ is the density of glass microballoon.
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