CN109060470A - A kind of hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture and preparation method thereof - Google Patents
A kind of hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture and preparation method thereof Download PDFInfo
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Abstract
The present invention provides a kind of hydraulic fracturing experiments test specimen and preparation method thereof of prefabricated intrinsic fracture, the wherein hydraulic fracturing experiments test specimen of the prefabricated intrinsic fracture, it is to consolidate molding petrophysical model and the fractured model in the petrophysical model after pouring using rock slurry, and there is the blind hole opened up in direction experiment test specimen, in which: the fractured model is the sandwich that can simulate intrinsic fracture that the fibre sheet material being oppositely arranged and filled layer are formed.Technical solution provided by the present invention can really simulate the state of intrinsic fracture under formation conditions, so as to meet research intrinsic fracture developmental state, crack filling situation, wellbore or the requirement of preforation tunnel and intrinsic fracture positional relationship.
Description
Technical field
The invention belongs to hydraulic fracturing indoor physical simulation experimental technique fields, and in particular to a kind of prefabricated intrinsic fracture
Hydraulic fracturing experiments test specimen and preparation method thereof.
Background technique
Increasingly depleted with conventional gas and oil resource, the exploitation of unconventional petroleum resources is increasingly taken seriously.Waterpower pressure
Split be effective exploitation unconventional petroleum resources one of key technology.During hydraulic fracturing site operation, fracturing fluid is passed through
High pressure pump group injects stratum, and since the injection rate of fracturing fluid in stratum is greater than fracturing fluid leak amount, fracturing fluid has suppressed height on stratum
Pressure, when pressure reaches certain value, formation fracture generates hydraulic fracture.For unconventional oil and gas reservoir, hydraulic fracture is extending
When encountering intrinsic fracture in the process, extension path can change；Meanwhile it naturally being split if open hole bore or preforation tunnel bore to meet
Seam, intrinsic fracture will affect hydraulic fracture initial cracking pressure size and incipient crack extending direction.
Hydraulic fracturing indoor physical simulation is tested at present, is mostly made using the target zone outcropping rock for being processed into standard shape
To test test specimen.But since natural rock internal fissure development randomness is strong and fracture intensity is invisible, it is difficult to meet
The requirement of theoretical research is carried out to the concrete condition of intrinsic fracture development impact hydraulic fracture crack initiation and extension.Therefore, using mould
The prefabricated crack synthetic core sample of quasi- intrinsic fracture development is as experiment test specimen just at the hot spot of current research.
Wuhan rock-soil mechanics research institute of the Chinese Academy of Sciences has developed a kind of crannied rock fracture simulation sample of tool, mainly sharp
Preforation tunnel is filled with soluble salts substances, ease of solubility salt is dissolved after consolidating fracturing fluid injection pipe, obtains unfilled penetrate
Eyelet, using the perforation eye as prefabricated intrinsic fracture.Energy institute of Institutes Of Technology Of He'nan has developed in a kind of simulation coal and rock
The experiment test specimen of complex fracture is specifically added ice cube in manufacturing artificial rock sample, dissolves to form intrinsic fracture to ice cube.
Both the above production method is formed by experiment test specimen, and being formed by crack all is to open, with formation condition
Lower intrinsic fracture is in closure mostly or is not inconsistent the case where being filled, and fracture pattern is uncontrollable, therefore there is very big office
It is sex-limited, it is difficult to which that accurate research intrinsic fracture develops the influence to pressure break.
Summary of the invention
In view of the above-mentioned drawbacks in the prior art, the present invention provides a kind of hydraulic fracturing experiments examination of prefabricated intrinsic fracture
Part, the hydraulic fracturing experiments test specimen of the prefabricated intrinsic fracture has closer stratum intrinsic fracture development truth and form can
The prefabricated crack of control.
The present invention also provides a kind of production method of the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture, can make obtained
Testing test specimen has closer to the prefabricated crack of stratum intrinsic fracture development truth, and the form in prefabricated crack is with controllable
Property.
To achieve the above object, the present invention provides a kind of hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture, to utilize
Rock slurry consolidates molding petrophysical model and the fractured model in the petrophysical model after pouring, and has towards experiment examination
The blind hole opened up in part, in which: fractured model is that the fibre sheet material being oppositely arranged and capable of simulating for filled layer formation are naturally split
The sandwich of seam.
The hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture provided by the present invention has the rock for simulation rock
Model and the fractured model in the petrophysical model, for simulating intrinsic fracture, and have for simulating wellbore or perforation
The blind hole of eyelet.Wherein, the fibre sheet material which there is two panels to be oppositely arranged, and it is filled in the two panels fibre sheet material
Between be formed by filled layer in gap.Gap is formed by between the fibre sheet material for simulating intrinsic fracture, fibre plate
Material is used to simulate two wall surfaces of intrinsic fracture, and filled layer is then used to simulate the filler in intrinsic fracture.
In this way, due to being equipped with filled layer in simulation intrinsic fracture, it is thus possible to which the most of intrinsic fractures of accurate simulation are filled out
The actual conditions filled；But also the feature of intrinsic fracture closure can be simulated according to the fitting situation between fibre sheet material.Meanwhile
Can also be by the angle and direction of control critical eigenvalue model, tendency, inclination angle and the trend of intrinsic fracture in accurate simulation stratum.
Also, scheme provided by the present invention, additionally it is possible to which accurate control critical eigenvalue form realizes intrinsic fracture in stratum
Accurate simulation carries out theoretical research to the concrete condition of intrinsic fracture development impact hydraulic fracture crack initiation and extension to meet
It is required that.
Specifically, the experiment test specimen is continued to complete after being placed in fractured model in the mold for pouring part rock slurry
Molding column is consolidated after pouring.Under normal circumstances, which is product obtained in accordance with the following steps:
1) rock slurry is poured in mold, and in the process, fractured model is placed on to the setting position in mold
It sets, control critical eigenvalue model is fully wrapped around by rock slurry；
2) it consolidates and forms to rock slurry, obtain petrophysical model and the fractured model in the petrophysical model；
3) mold is removed, and opens up blind hole on petrophysical model, obtains the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture.
As described above, filled layer is used to simulate the filler in intrinsic fracture in fractured model, support generally can be used
Agent particle is made.Specifically, filled layer is the single or multi-layer structure that proppant particles are formed, and filled layer and fibre sheet material it
Between fixed by gluing.
In specific implementation process of the present invention, fractured model is made according to following steps: first in the table of a fibre sheet material
Spreading glue on face；Then proppant particles are pasted onto the fibre sheet material surface for being coated with glue；Finally by another fibre plate
Material is pasted on proppant particles, to form the sandwich of " fibre sheet material-filled layer-fibre sheet material ".
By controlling the thickness of filled layer with the width situation of accurate simulation intrinsic fracture.Since proppant particles are generally
Fine particle spherical or subsphaeroidal, size is essentially identical, therefore can select that there is appropriate partial size according to realistic simulation demand
Proppant particles, and can also rationally control the number of plies of proppant particles.
In the present invention, it is smooth on the surface of a fibre sheet material, equably paste one layer of proppant particles, then will be another
Fibre plate covers and is pasted onto proppant particles surface, that is, forms the interlayer knot of " fibre sheet material-single layer filled layer-fibre sheet material "
Structure.
Alternatively, can also it is smooth on the surface of fibre sheet material, equably paste two or more layers proppant particles, then
Another fibre plate is covered to and is pasted onto proppant particles surface, forms the folder of " fibre sheet material-multilayer filled layer-fibre sheet material "
Layer structure.
Proppant fills situation can be true according to the practical filling situation of filler in practical intrinsic fracture to be simulated
Fixed, therefore, the layer that is at least partly filled that gap is formed by between the fibre sheet material being oppositely arranged is filled.Specifically, can
It is (i.e. crack wall surface only partially has proppant) and natural to be locally filled with the paste position of proppant simulation intrinsic fracture
Crack is filled up completely (wall surface all positions in crack are pasted with proppant).
As described above, be formed by gap between fibre sheet material for simulating intrinsic fracture, therefore can be according to naturally splitting
The geometric shape of seam reasonably selects the fibre sheet material of suitable size and shape.
Fibre sheet material is used to simulate the wall surface of intrinsic fracture, therefore fibre sheet material should be with the infiltration with simulation intrinsic fracture
The similar fibre sheet material of permeability.In the present invention, the permeability of fibre plate refers to that fibre plate allows liquid (such as water) to pass through
Ability.
It is appreciated that the fibre sheet material should have suitable water imbibition, so that being poured in rock slurry and consolidation formed
Cheng Zhong, it is broken that the not hygroscopic softening of the fibre sheet material even results in separation.
Meanwhile the fibre sheet material is preferably provided with certain hardness, it is fine with making fractured model and during pouring molding
Dimension sheet material can remain unchanged shape as far as possible.Under normal circumstances, quantification of 150-200g/ square metres, thickness may be selected in fibre sheet material
Paper less than 1mm, such as the manuseript binder or business card paper of periodical, brochure.
Also, the thickness general control of fractured model is in 2~3mm, and wherein the thickness of fibre sheet material is the smaller the better.
In the present invention, petrophysical model be consolidated after being poured by rock slurry it is molding, for realize rock accurate simulation,
In specific implementation process of the present invention, petrophysical model is obtained by cement mortar consolidation molding.Specifically, cement mortar is by water
Mud, Sha Heshui, the slurry being made into as needed, such as after cement, sand and water are mixed and solidified with the mass ratio of 3:1:1, i.e.,
It can be used for accurate simulation tight sand.
In the present invention, which can pass through fractured model, i.e. blind hole intersect with fractured model, with simulate wellbore drill or
Preforation tunnel passes through intrinsic fracture, can simulate what intrinsic fracture under different situations extended crack initiation by the change of angle of intersection
It influences.Alternatively, blind hole and fractured model mutually mutually can also naturally be split from can study hydraulic fracture during extension from, the two
Stitch the influence that fracture extends situation.
Further, can also be coated in blind via bottom can prevent the gluing layer of the blind via bottom crack initiation.Specifically,
It is to instill a certain amount of glue in blind via bottom, prevents crack from blind via bottom crack initiation.In specific implementation process of the present invention, it is
Use epoxide-resin glue.
The production method that another aspect of the present invention is to provide a kind of hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture,
Include the following steps:
Rock slurry is poured in mold, and in the process, fractured model is placed on the setting position in mold,
Control critical eigenvalue model is fully wrapped around by rock slurry；
It consolidates and forms to rock slurry, obtain petrophysical model and the fractured model in the petrophysical model；
Mold is removed, and opens up blind hole on petrophysical model, obtains the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture；
Wherein, fractured model is the interlayer that can simulate intrinsic fracture that the fibre sheet material being oppositely arranged and filled layer are formed
Structure.
It is appreciated that fractured model is placed on the setting position in mold, refer in particular to according to the natural of required simulation
The angle and direction of fractured model is rationally arranged in crack situation.Wherein angle is between blind hole axis and fibre sheet material place plane
Angle；Datum plane is generally considered as with any plane for being parallel to blind hole axis, fibre sheet material is relative to the datum plane institute
The angle of rotation is different, is considered as direction difference.The direction placed according to fractured model and angle, that is, can determine fractured model
Spatial position.
Under formation conditions, stress suffered by rock can simplify as horizontal maximum principal stress, horizontal minimum principal stress
These three mutually perpendicular stress with vertical stress.In experimentation, experiment test specimen equally also will receive three it is orthogonal
Confining pressure, to simulate actual formation situation.The angle and/or direction that fractured model is placed are different, then test and answer suffered by test specimen
Power situation is also different.Therefore, the direction placed according to fractured model and angle, being capable of intrinsic fracture in accurate description stratum
Tendency, inclination angle and trend.
In the present invention, the filled layer in fractured model is used to simulate the filler in intrinsic fracture, specifically, above-mentioned filling
Layer is the single or multi-layer structure formed by proppant particles, and is fixed between filled layer and fibre sheet material by gluing.At this
In invention specific implementation process, further include the steps that making fractured model, comprising: apply daub on the surface of a fibre sheet material
Water；Proppant particles are pasted onto the fibre sheet material surface for being coated with glue, form filled layer；Another fibre sheet material is pasted onto
On proppant particles.
Further, the layer that is at least partly filled for gap being formed by between the above-mentioned fibre sheet material being oppositely arranged is filled out
It fills.I.e. proppant particles, which are formed by filled layer, can both be filled up completely above-mentioned gap, can also be only filled with the one of above-mentioned gap
Part can specifically be reasonably selected according to the filling situation of filler in the intrinsic fracture of actually required simulation.
In the present invention, gap is formed by between the fibre sheet material for simulating intrinsic fracture, fibre sheet material is for simulating
Two wall surfaces of intrinsic fracture.Therefore infiltration of the permeability of the above-mentioned fibre sheet material being oppositely arranged preferably with simulation intrinsic fracture
Property is similar.
In addition to this, which should also have certain hardness, to make the fractured model and entire experiment
Biggish deformation will not occur during test specimen.In specific implementation process of the present invention, above-mentioned fibre sheet material specifically can be paper
, it is particularly possible to it is quantification of 150-200g/ square metres, paper of the thickness less than 1mm.
Meanwhile the water imbibition of the fibre sheet material should not be too large, so that in rock slurry during pouring and consolidating molding,
The fibre sheet material, which will not occur to absorb water to soften to even result in separate, to be crushed.
It typically would be desirable to the integral thickness of the fractured model of processing and fabricating completion should not be too big, the thickness of general control fractured model
Degree is 2~3mm, and wherein the thickness of fibre sheet material is the smaller the better.
It is above-mentioned specifically to can be cement mortar for making the rock slurry of petrophysical model, that is, by well completion cement, thin
Husky and water stirs evenly according to a certain percentage, then obtains petrophysical model through consolidation molding.The wherein cement of different ratio
The mechanical strength for the petrophysical model that mortar obtains and physical property difference, it is suitable to be determined according to the rock property of institute's simulated formation
Proportion.Such as after well completion cement, sand and water are mixed and solidified with the mass ratio of 3:1:1, accurate simulation densification can be used to
Sandstone.
Mold used in above-mentioned manufacturing process specifically can have rectangular intracoelomic cavity or cylindrical cavity, specific ruler
It is very little to be determined according to the size of experiment test specimen.In specific implementation process of the present invention, using the matched rectangular steel plates of five block sizes,
One piece is done bottom plate, and another four pieces are done side plate.Card slot is offered in wherein two pieces of side board edges being oppositely arranged, then by another two pieces of sides
The edge of plate is inserted respectively into the card slot, is realized between this five blocks of steel plates finally by bolt or other any known modes
Fixed and close connection, to form open rectangular mould.
It is appreciated that the disassembly for convenience of subsequent mold can be on mould inner wall before actually pouring rock slurry
Lubricant (lubricating grease) uniformly is smeared, facilitates the disassembly of subsequent rock slurry consolidation molding rear mold, also avoids mold to entire
Test the damage of test specimen.
In the present invention, above-mentioned blind hole can specifically be determined for simulating wellbore or preforation tunnel according to practical study demand
Positional relationship between blind hole and crack, for example, can make blind hole pass through fractured model, alternatively, with fractured model mutually from.
Further, further include the steps that instilling glue in blind hole to form gluing layer.The glue should have good
Bonding capacity, such as epoxide-resin glue.
It is appreciated that opening up the process of blind hole on petrophysical model, simulation drilling process actually can be regarded as；In blind hole
Interior instillation glue actually can be regarded as simulation Completion Operations.In other words, the glue instilled into blind hole can be used for having simulated well
Liquid.
The hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture provided by the invention has petrophysical model and is located at the rock
Fractured model in model, the fibre sheet material that wherein there is the fractured model two panels to be oppositely arranged, and it is filled in two panels fibre
The filled layer being formed by between dimension sheet material in gap.It is arranged by above structure:
1. by the size shape of fibre sheet material, the position of fractured model, direction, angle can naturally be split with simulated formation
The developmental state of seam, the including but not limited to geometric shape of intrinsic fracture, position, trend and inclination angle.
2. intrinsic fracture inner stuffing can be simulated by laying (filling) situation of filled layer between two panels fibre sheet material
Filling situation, can be locally filled with the position simulation fracture of proppant (crack wall surface only has portion to have proppant) and
Crack is filled up completely (there are proppant in wall surface all positions in crack)；Quantity can be laid with proppant and lays number of plies simulation naturally
Fracture width situation.
3. can be seeped with simulated formation intrinsic fracture by the permeability of fibre sheet material, the fitting situation of two fibre sheet materials
Saturating and closure feature.
4. the two intersection can simulate wellbore and drill or preforation tunnel by positional relationship between fractured model and blind hole
Across intrinsic fracture, the influence that intrinsic fracture extends crack initiation under different situations can be simulated by the change of angle of intersection；Two
Person is mutually from the influence that can study hydraulic fracture intrinsic fracture fracture extension situation during extension.
In conclusion the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture provided by the present invention, can really simulate
The state of intrinsic fracture under formation conditions, so as to meet research intrinsic fracture developmental state, crack filling situation, wellbore
Or the requirement of preforation tunnel and intrinsic fracture positional relationship.
The production method of the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture provided by the present invention has step simple
Feature, and make experiment test specimen obtained that there is the prefabricated crack for developing truth closer to stratum intrinsic fracture, and prefabricated
The form in crack has controllability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of production fractured model provided in an embodiment of the present invention.
Description of symbols:
1- petrophysical model；2- fractured model；
21- fibre sheet material；22- filled layer；
3- blind hole.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.
Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.In the absence of conflict, the feature in following embodiments
It can be combined with each other.
Embodiment one
Fig. 1 is the structural schematic diagram of the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture provided in this embodiment；Fig. 2 is this
The schematic diagram for the production fractured model that embodiment provides.As depicted in figs. 1 and 2, prefabricated intrinsic fracture provided in this embodiment
Hydraulic fracturing experiments test specimen, to consolidate molding petrophysical model 1 after pouring using rock slurry and in the petrophysical model 1
Fractured model 2, and there is the blind hole 3 opened up in direction experiment test specimen, in which: fractured model 2 is the fibre sheet material being oppositely arranged
21 and filled layer 22 formed the sandwich that can simulate intrinsic fracture.
Specifically, the experiment test specimen has been continued after being placed in fractured model 2 in the mold for pouring part rock slurry
Molding column is consolidated at pouring.
The present embodiment is not specially limited the specific manifestation form of the column, specifically can be according to experiment and research
Demand is rationally arranged, generally cylindric or cuboid, therefore can reasonably select the mold with corresponding cavity shape.
Specifically, part rock slurry can be poured into mold, then the fractured model 2 made in advance is placed
Setting position in mold then proceedes to pour remaining rock slurry, until pouring completion, while it is complete to control rock slurry
Full package fractured model 2.Then after the consolidation molding of rock slurry, mold is removed, and blind hole is drilled on mold, to obtain
The hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture.
As shown in Fig. 2, the fractured model 2 can make in accordance with the following steps in specific implementation process of the present invention: in a fibre
Tie up spreading glue on the surface of sheet material 21；Proppant particles are pasted onto 21 surface of fibre sheet material for being coated with glue, formation is filled out
Fill layer 22；Another fibre sheet material 21 is pasted on proppant particles, there is " fibre sheet material 21- filled layer 22- fibre sheet material
21 " sandwich is formed between two fibre sheet materials 21 and is had the gap, and filled layer 22 is filled in the gap.
It is appreciated that the occupied state of filled layer 22 can be according to the filler situation of the intrinsic fracture of actually required simulation
Rationally setting.
Specifically, filled layer 22 can be the single layer structure formed by proppant particles, or formed by proppant particles
Multilayered structure, and fixed between filled layer 22 and fibre sheet material 21 by gluing.Certainly, if filled layer 22 is multilayered structure,
Then fixed between adjacent filled layer 22 also by gluing.
Specifically, the layer 22 that is at least partly filled for being formed by gap between the fibre sheet material 21 being oppositely arranged is filled out
It fills, i.e., filled layer 22 can both fill up entire gap, can not also fill up entire gap.
Specifically, above-mentioned fibre sheet material 21 be with the similar fibre sheet material 21 of the simulation permeability of intrinsic fracture, with
The actual conditions of accurate simulation intrinsic fracture.Certainly, when selecting fibre sheet material 21, water imbibition do not answer it is excessive, to guarantee
During production experiment test specimen, the deformation even broken problem of dispersion that absorbs water because of fibre sheet material 21 will not occur.
Meanwhile fibre sheet material 21 should also have certain hardness, structural strength in other words, can guarantee that it is making
It is able to maintain during the even experiment test specimen of fractured model 2 and does not deform substantially.Under normal circumstances, fibre sheet material 21 can choose
Quantification of 150-200g/ square metres, paper of the thickness less than 1mm, such as business card paper, periodical or journal surface paper.
Under normal circumstances, the thickness of entire fractured model 2 should not be too big, and integral thickness is generally 2-3mm or so, wherein fine
The thickness for tieing up sheet material 21 is the smaller the better.
In the present embodiment, blind hole 3 can specifically pass through the fractured model 2, as shown in Figure 1, blind hole 3 and 2 phase of fractured model
Hand over, with simulate wellbore drill or preforation tunnel pass through intrinsic fracture, can be simulated under different situations by the change of angle of intersection
The influence that intrinsic fracture extends crack initiation.Alternatively, blind hole 3 and 2 phase of fractured model are from can study hydraulic fracture in extension process
Middle intrinsic fracture fracture extends the influence of situation.
Further, can also be coated in 3 bottom of blind hole can prevent the gluing layer of the 3 bottom crack initiation of blind hole.Specifically
, it is to instill a certain amount of glue in 3 bottom of blind hole, prevents crack from blind via bottom crack initiation.In the specific implementation process, it uses
The good glue of bonding capacity, for example use epoxide-resin glue.
Embodiment two
The present embodiment provides a kind of production sides of the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture described in embodiment one
Method includes the following steps:
S1, production fractured model 2
(1) according to institute's intrinsic fracture shape to be simulated, size, the identical fibre sheet material 21 of two plate shapes is cut,
Two wall surfaces as simulation intrinsic fracture.
Wherein, which is specially the scraps of paper, and differential permeability and the permeability of intrinsic fracture are substantially similar
The scraps of paper, and its quantification of 150-200g/ square metres, thickness be less than 1mm.Generally usable business card paper or periodical, journal surface
Use paper.
(2) sheet of paper on piece applies glue wherein, and glue can guarantee during smearing with enough cementing strengths
On the basis of make glue smear it is thin as far as possible.
(3) with the filler of proppant simulation intrinsic fracture, proppant particles are sticked on the scraps of paper for being coated with glue, are formed
Filled layer 22.
Specifically, can according to required simulation intrinsic fracture fill situation, select proppant particles paste position, number and
The number of plies.Wherein filled layer 22 can be single-layer or multi-layer；Proppant particles can completely cover the entire scraps of paper, can also be only in paper
Proppant particles are pasted on the partial region on piece surface.
(4) the two panels scraps of paper are pasted together, are clipped in pasted proppant among two scraps of paper, form " fibre plate
The sandwich of material 21- filled layer 22- fibre sheet material 21 ", obtains the fractured model 2 with charges.
S2, production experiment test specimen
(1) assembly mold, and guarantee mould inside neat and tidy, mold junction is close.
Specifically, it is cube, dismountable mold that five blocks of steel plates, which can be used, to be assembled into an inner cavity.
(2) lubricating grease, later period molding experiment test specimen easy to disassemble are uniformly smeared in mould inner wall with brush.
(3) cement is driven into away fine powder, reduction finished ground cement consolidates the small agglomerate to be formed and pours experiment test piece intensity to the later period
Influence；Cement, fine sand and water are uniformly mixed in bucket with the ratio set, form rock slurry.
(4) rock slurry is poured into mold, in casting process, according to institute intrinsic fracture position to be simulated, trend,
Angle will be placed on setting position by ready-made fractured model 2 before.Continue for rock slurry to be poured into mold, until rock is starched
The height of material is slightly above mold height, and control critical eigenvalue model 2 is wrapped up by rock slurry completely.
The formation of bubble should be reduced in casting process, and avoids the disturbance in subsequent casting process to preset intrinsic fracture.
(5) when the also not fully consolidated molding of rock slurry but when there is some strength, with long ruler by extra thickness
It is bulldozed along mold, it is ensured that rock slurry end face is smooth.
Water is applied in due course in rock slurry consolidation process, prevents from being made because overdrying cracks except crack in consolidation process
The experiment test specimen of other parts intensity homogeneous except model.
(6) after the fully consolidated molding of rock slurry, mold is dismantled.
(7) it is bored on experiment test specimen and opens one section of blind hole 3, for simulating wellbore or perforation；Then ring is instilled in 3 bottom of blind hole
Oxygen resin glue is prevented with forming gluing layer (not shown) in 3 bottom of blind hole in the weaker place's crack initiation of 3 bottom strength of blind hole.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture, which is characterized in that it is solid after being poured using rock slurry
It ties molding petrophysical model and the fractured model in the petrophysical model, and has blind towards opening up in the experiment test specimen
Hole, in which:
The fractured model is the sandwich that can simulate intrinsic fracture that the fibre sheet material being oppositely arranged and filled layer are formed.
2. the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture according to claim 1, which is characterized in that the experiment examination
Part is to continue to complete to pour and consolidate molding column after being placed in fractured model in the mold for pouring part rock slurry.
3. the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture according to claim 1 or 2, which is characterized in that described to fill out
Filling layer is the single or multi-layer structure that proppant particles are formed, and solid by gluing between the filled layer and the fibre sheet material
It is fixed.
4. the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture according to claim 1-3, which is characterized in that institute
It states and is formed by least partly being filled by the filled layer for gap between the fibre sheet material being oppositely arranged.
5. the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture according to claim 1-3, which is characterized in that institute
Stating fibre sheet material is with fibre sheet material similar with the simulation permeability of intrinsic fracture.
6. the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture according to claim 1, which is characterized in that the blind hole is worn
Cross the fractured model, alternatively, with the fractured model mutually from.
7. the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture according to claim 1 or 6, which is characterized in that described blind
Hole bottom is coated with the gluing layer that can prevent the blind via bottom crack initiation.
8. a kind of production method of the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture, which comprises the steps of:
Rock slurry is poured in mold, and in the process, fractured model is placed into setting position in the mould,
It is fully wrapped around by rock slurry to control the fractured model；
It consolidates and forms to the rock slurry, obtain petrophysical model and the fractured model in the petrophysical model；
Mold is removed, and opens up blind hole on petrophysical model, obtains the hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture；
Wherein, the fractured model is the interlayer that can simulate intrinsic fracture that the fibre sheet material being oppositely arranged and filled layer are formed
Structure.
9. production method according to claim 8, which is characterized in that further include the steps that making the fractured model, wrap
It includes:
The spreading glue on the surface of a fibre sheet material；
Proppant particles are pasted onto the fibre sheet material surface for being coated with glue, form filled layer；
Another fibre sheet material is pasted on the proppant particles.
10. production method according to claim 8, which is characterized in that further include instilling glue in the blind hole with shape
The step of at gluing layer.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709021A (en) * | 2019-02-26 | 2019-05-03 | 中国石油大学(华东) | Evaluation blocking agent blocks in perforation crack and the experimental provision and method of plugging removal effect |
| CN109869126A (en) * | 2019-04-25 | 2019-06-11 | 西安石油大学 | A kind of pressure break simulation by tracing experimental provision and experimental method |
| CN110793861A (en) * | 2019-11-01 | 2020-02-14 | 中国石油大学(北京) | Test method and device for determining hydraulic fracturing gravel penetration discharge capacity of conglomerate test piece |
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Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793142A (en) * | 2010-01-27 | 2010-08-04 | 中国石油大学(北京) | True triaxial drilling leakage blockage simulation assessment device |
| CN102289980A (en) * | 2011-05-24 | 2011-12-21 | 中国石油大学(北京) | Method for preparing preset cracks in hydrofracture simulation specimen |
| US20120097396A1 (en) * | 2010-10-20 | 2012-04-26 | Halliburton Energy Services, Inc. | Bottom hole assembly |
| CN103352680A (en) * | 2013-07-05 | 2013-10-16 | 中国石油大学(北京) | Foam huff and puff sand discharging experiment device and method based on integration of well hole and oil reservoir |
| CN203776493U (en) * | 2014-03-24 | 2014-08-20 | 耿瑞阳 | Hip shaping cushion |
| CN104060976A (en) * | 2014-07-01 | 2014-09-24 | 中国石油大学(北京) | Method for physically simulating sectional hydrofracture of different well types of perforated well shafts |
| CN104100252A (en) * | 2014-07-23 | 2014-10-15 | 中国石油大学(北京) | Horizontal well multistage hydraulic fracturing physical simulation method |
| CN204016645U (en) * | 2014-08-26 | 2014-12-17 | 柳州市人民医院 | Multiple injury first aid of fracture protection stretcher |
| CN104609803A (en) * | 2015-01-29 | 2015-05-13 | 天津大学 | Rubber-particle cement-based material joint filler for concrete pavement and construction method thereof |
| CN104833555A (en) * | 2015-03-09 | 2015-08-12 | 绍兴文理学院 | Producing method of intermittent-filling fracture rock sample model |
| CN105178922A (en) * | 2015-08-28 | 2015-12-23 | 中国科学院武汉岩土力学研究所 | Perforation completion method used for hydraulic fracturing physical simulation test |
| CN106092695A (en) * | 2016-08-05 | 2016-11-09 | 湖南科技大学 | A kind of rock-like materials structural plane is produced and for the device and method of shearing test |
| RU2612418C1 (en) * | 2015-12-23 | 2017-03-09 | Публичное акционерное общество "Татнефть" им. В.Д. Шашина | Formation hydraulicfracturing |
| WO2017062099A1 (en) * | 2015-10-05 | 2017-04-13 | Schlumberger Technology Corporation | Polymeric and elastomeric proppant placement in hydraulic fracture network |
| CN106940267A (en) * | 2017-05-04 | 2017-07-11 | 中国矿业大学(北京) | It is a kind of to prepare the experimental bench with random joints crack test specimen |
| CN208366689U (en) * | 2018-07-10 | 2019-01-11 | 中国石油大学(北京) | A kind of hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture |
-
2018
- 2018-07-10 CN CN201810753681.7A patent/CN109060470B/en not_active Expired - Fee Related
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101793142A (en) * | 2010-01-27 | 2010-08-04 | 中国石油大学(北京) | True triaxial drilling leakage blockage simulation assessment device |
| US20120097396A1 (en) * | 2010-10-20 | 2012-04-26 | Halliburton Energy Services, Inc. | Bottom hole assembly |
| CN102289980A (en) * | 2011-05-24 | 2011-12-21 | 中国石油大学(北京) | Method for preparing preset cracks in hydrofracture simulation specimen |
| CN103352680A (en) * | 2013-07-05 | 2013-10-16 | 中国石油大学(北京) | Foam huff and puff sand discharging experiment device and method based on integration of well hole and oil reservoir |
| CN203776493U (en) * | 2014-03-24 | 2014-08-20 | 耿瑞阳 | Hip shaping cushion |
| CN104060976A (en) * | 2014-07-01 | 2014-09-24 | 中国石油大学(北京) | Method for physically simulating sectional hydrofracture of different well types of perforated well shafts |
| CN104100252A (en) * | 2014-07-23 | 2014-10-15 | 中国石油大学(北京) | Horizontal well multistage hydraulic fracturing physical simulation method |
| CN204016645U (en) * | 2014-08-26 | 2014-12-17 | 柳州市人民医院 | Multiple injury first aid of fracture protection stretcher |
| CN104609803A (en) * | 2015-01-29 | 2015-05-13 | 天津大学 | Rubber-particle cement-based material joint filler for concrete pavement and construction method thereof |
| CN104833555A (en) * | 2015-03-09 | 2015-08-12 | 绍兴文理学院 | Producing method of intermittent-filling fracture rock sample model |
| CN105178922A (en) * | 2015-08-28 | 2015-12-23 | 中国科学院武汉岩土力学研究所 | Perforation completion method used for hydraulic fracturing physical simulation test |
| WO2017062099A1 (en) * | 2015-10-05 | 2017-04-13 | Schlumberger Technology Corporation | Polymeric and elastomeric proppant placement in hydraulic fracture network |
| RU2612418C1 (en) * | 2015-12-23 | 2017-03-09 | Публичное акционерное общество "Татнефть" им. В.Д. Шашина | Formation hydraulicfracturing |
| CN106092695A (en) * | 2016-08-05 | 2016-11-09 | 湖南科技大学 | A kind of rock-like materials structural plane is produced and for the device and method of shearing test |
| CN106940267A (en) * | 2017-05-04 | 2017-07-11 | 中国矿业大学(北京) | It is a kind of to prepare the experimental bench with random joints crack test specimen |
| CN208366689U (en) * | 2018-07-10 | 2019-01-11 | 中国石油大学(北京) | A kind of hydraulic fracturing experiments test specimen of prefabricated intrinsic fracture |
Non-Patent Citations (4)
| Title |
|---|
| WARPINSKIN N R: "Influence of geologic discontinuities on hydraulic fracture propagation", 《JOURNAL OR PETROLEUM TECHNOLOGY》 * |
| 周大伟: "缝洞型岩石体积压裂试验模拟研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
| 杨秀夫 等: "国内外水力压裂技术现状及发展趋势", 《钻采工艺》 * |
| 雷鑫 等: "射孔对致密砂岩气藏水力压裂裂缝起裂与扩展的影响", 《东北石油大学学报》 * |
Cited By (13)
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|---|---|---|---|---|
| CN109709021A (en) * | 2019-02-26 | 2019-05-03 | 中国石油大学(华东) | Evaluation blocking agent blocks in perforation crack and the experimental provision and method of plugging removal effect |
| CN109709021B (en) * | 2019-02-26 | 2022-02-22 | 中国石油大学(华东) | Experimental device and method for evaluating plugging and deblocking effects of plugging agent in perforation crack |
| CN109869126B (en) * | 2019-04-25 | 2021-07-06 | 西安石油大学 | Fracturing tracing simulation experiment device and method |
| CN109869126A (en) * | 2019-04-25 | 2019-06-11 | 西安石油大学 | A kind of pressure break simulation by tracing experimental provision and experimental method |
| CN110793861A (en) * | 2019-11-01 | 2020-02-14 | 中国石油大学(北京) | Test method and device for determining hydraulic fracturing gravel penetration discharge capacity of conglomerate test piece |
| CN110793861B (en) * | 2019-11-01 | 2020-10-13 | 中国石油大学(北京) | Test method and device for determining hydraulic fracturing gravel penetration discharge capacity of conglomerate test piece |
| CN110987634A (en) * | 2019-11-15 | 2020-04-10 | 河海大学 | Test device and test method for hydraulic fracture of gravel-doped core wall |
| CN110847872A (en) * | 2019-11-25 | 2020-02-28 | 西南石油大学 | Experimental device for be used for studying intermediate layer to two horizontal well SAGD exploitation influences |
| CN112461410A (en) * | 2020-12-07 | 2021-03-09 | 东北大学 | Device for measuring vertical stress distribution of ore rock discrete bodies in laboratory |
| CN113719281A (en) * | 2021-10-11 | 2021-11-30 | 中煤科工集团西安研究院有限公司 | Device and method for simulating transient electromagnetic response of hydraulic fracturing stratum drilling |
| CN113719281B (en) * | 2021-10-11 | 2024-05-24 | 中煤科工集团西安研究院有限公司 | Device and method for simulating transient electromagnetic response of hydraulic fracturing formation drilling |
| CN114474326A (en) * | 2022-03-09 | 2022-05-13 | 内蒙古科技大学 | Method for manufacturing prefabricated shaft for manufacturing prefabricated crack and prefabricated concrete test block |
| CN114474326B (en) * | 2022-03-09 | 2023-10-10 | 内蒙古科技大学 | Prefabricated well bore for manufacturing prefabricated cracks and manufacturing method of prefabricated concrete test block |
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