CN106198181A - A kind of fractured horizontal well physical modeling's sample and preparation method thereof - Google Patents
A kind of fractured horizontal well physical modeling's sample and preparation method thereof Download PDFInfo
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- CN106198181A CN106198181A CN201510229217.4A CN201510229217A CN106198181A CN 106198181 A CN106198181 A CN 106198181A CN 201510229217 A CN201510229217 A CN 201510229217A CN 106198181 A CN106198181 A CN 106198181A
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Abstract
The present invention proposes a kind of fractured horizontal well physical modeling's sample and preparation method thereof.This fractured horizontal well physical modeling's sample is provided with formation high permeability area territory at the proppant in upper and lower glued layer, and upper and lower glued layer.Can obtain when fractured horizontal well physical modeling's sample being worn lamination and splitting to wear to be laminated and split the response at upper glued layer and lower glued layer.For research different reservoir thickness, different borehole size, different fracturing liquid, varying level segment length, different crack starter locations etc., horizontal well is worn lamination to split the impact of fracture propagation and provide effective analog sample.
Description
Technical field
The present invention relates to oil gas engineering field, particularly to a kind of fractured horizontal well physical modeling's sample and making thereof
Method.
Background technology
At present, China's Low Permeability Oil/gas uses staged fracturing of horizontal well technology to carry out stimulation work.Horizontal well in segments
It is the most maximally efficient that fracturing technique is applied, and achieves effect in various degree at different oil and gas reservoirs
Really.But, due to reservoir cognitive diversity, staged fracturing of horizontal well technology in the application process of different reservoir,
The understanding of the aspects such as the rule of fracture propagation and relative influence is still not clear.Physical modeling's pressure break is that understanding pressure break is split
The important means of seam Extending Law, therefore, the physical modeling's test material preparation for different reservoir defines a lot of one-tenth
Really.Existing pressure break test material preparation technology can be divided into two classes by material:
One class is the synthetic core sample pressure break test material preparation method made with materials such as cement.Use the side of synthetic core sample
Formula carries out the preparation of pressure break sample, and its feature is to form homogeneous samples in layer, as at scientific literature " water
Defeat and split multiple cracking crack initiation simulation experiment and analysis " " one is for water for (author: Liu Hong) and patent documentation
Defeat the manufacture method of the stratified model splitting physical simulation experiment " (CN103234791A) is respectively adopted pure
Cement is mixed in proportion with quartz sand, and the mode such as model charge and water stirring has carried out the system of synthetic core sample test specimen
Make.
Another kind of is the method being processed making pressure break test specimen with natural rock sample.So make pressure break test specimen more
Close to real reservoir lithology, as in scientific literature " research of shale gas reservoir hydrfracturing physical simulation experiment "
(author: Zhang Xu etc.), " coal petrography hydraulic fracture propagation law experimental study " (author: Yang Jiaosheng), with
And patent documentation " a kind of coal bed gas well fracturing physical modeling's test specimen manufacture method " (CN103883302A)
In, be respectively directed to coal petrography and shale pressure break, use natural rock sample and shale appear processing mode be simulated sample preparation.
But all there are some problems in these methods.First, the pressure break examination that the material such as cement, resin makes is used
Part, differs bigger with actual rock sample physical property and mechanical properties of rock, it is impossible to simulate fracture extension rule really.
Secondly, conventional pressure break test specimen is primarily directed to simulate the test of straight well, and the pit shaft of straight well is vertically arranged and generally
It is perpendicular to bed plane, can not the fracturing fracture of reaction water horizontal well according to the result of the test obtained by these pressure break test specimens
Extending Law.Again, the simple test specimen manufacture method considering lithology difference, there is no the process that design level is corresponding
Method, it is impossible to significant reaction goes out the fracture extension related law in aspect in an experiment.Additionally, test specimen is big in the past
Many employing injection strings are directly fixedly arranged in pit shaft, the most truly the liquid of injection string during simulation pressure break
Inject, can not preferably simulate the impact on fracturing fracture expression in the eyes of the different size pit shaft.
Summary of the invention
The technical problem to be solved is for providing a kind of fractured horizontal well physical modeling's sample and making thereof
Method, this fractured horizontal well physical modeling's sample can be simulated the mechanical property of aspect and carry out pressure break mould
Intend can obtaining during test judging that fracture extension is to response during aspect.
For solving above-mentioned technical problem, the invention provides a kind of fractured horizontal well physical modeling's sample and making thereof
Method.This fractured horizontal well physical modeling's sample includes: tubing string and the lower sillar stacked gradually, lower glued layer,
Pressure break sillar, upper glued layer, upper sillar, wherein, pressure break sillar includes extending to pressure from the side of pressure break sillar
Splitting the blind hole at the center of sillar, one end of tubing string is inserted blind hole and is not connected to the bottom of blind hole, the periphery of tubing string
Sealing between the internal perisporium of wall and pressed blind hole, upper glued layer includes being arranged between sillar and pressure break sillar
And be positioned at the upper gasket in the middle part of the upper bottom surface of pressure break sillar, be arranged on the proppant of upper gasket and be arranged on
Between upper sillar and pressure break sillar and be positioned at the fluid sealant outside upper gasket, lower glued layer includes being arranged on lower rock
Between block and pressure break sillar and be positioned at the lower gasket in the middle part of the bottom surface of pressure break sillar, be arranged on lower gasket
Proppant and be arranged between lower sillar and pressure break sillar and be positioned at the fluid sealant outside lower gasket.
In a specific embodiment, lower sillar, pressure break sillar and upper sillar are cube.
In a specific embodiment, tubing string is parallel to the upper bottom surface of pressure break sillar and is perpendicular to side, and passes through
Wear the center of side.
In a specific embodiment, lower sillar, pressure break sillar, each bottom surface of upper sillar are the length of side etc.
In the square of a, lower sillar, pressure break sillar, upper sillar, upper glued layer, the thickness of lower glued layer divide successively
Not Wei b, c, d, e, f, wherein
The long measure of a, b, c, d, e, f is the most identical.
In a specific embodiment, insert the length to the bottom of blind hole of the end in pressure break sillar from tubing string
Scope is
In a specific embodiment, a=300mm.
In a specific embodiment, blind hole inserts the portion to the bottom of blind hole, the end of pressure break sillar from tubing string
The diameter divided is less than tubing string external diameter.
In a specific embodiment, upper sillar, pressure break sillar and lower sillar are made by natural rock sample.
In a specific embodiment, the bed plane of upper sillar, the bed plane of pressure break sillar and the layer of lower sillar
Reason face is all parallel with the upper bottom surface of pressure break sillar.
A kind of method that the invention allows for production technique well pressure break physical modeling's sample, it includes following step
Rapid:
Destination layer position according to the required simulation of experiment, the overlying rock of destination layer position, the lower overlying strata of destination layer position
The mechanical property of layer chooses three pieces of natural rock samples, and respectively corresponding cut into the pressure break sillar of stratiform, upper sillar,
Lower sillar；
Drill through blind hole in the side of pressure break sillar, tubing string is inserted in the hole, and outside the perisporium and tubing string of blind hole
Formed between perisporium and seal；
The upper gasket filling full proppant is set at the middle part of the upper bottom surface of pressure break sillar, is coated with in the outside of upper gasket
Cloth sealant layer, covers the bottom surface of upper sillar on the proppant in upper gasket；
The lower gasket filling full proppant is set at the middle part of the upper bottom surface of lower sillar, is coated with in the outside of lower gasket
Sealant layer, covers the bottom surface of pressure break sillar on the proppant in lower gasket.
This fractured horizontal well physical modeling's sample is provided with in upper and lower glued layer, and upper and lower glued layer
High permeability area territory is formed at proppant.Can obtain when lamination splits fractured horizontal well physical modeling's sample is worn
Wear lamination and split the response at upper glued layer and lower glued layer.For research different reservoir thickness, different borehole size,
Horizontal well is worn lamination and is split fracture propagation by different fracturing liquids, varying level segment length, different crack starter locations etc.
Impact provides effective analog sample.
Accompanying drawing explanation
Hereinafter based on embodiment reference accompanying drawing, the present invention will be described in more detail.Wherein:
Fig. 1 shows the structural representation of fractured horizontal well physical modeling's sample of one embodiment of the present invention；
Fig. 2 shows the schematic perspective view of pressure break sillar in Fig. 1.
Fig. 3 shows in fracturing simulation test procedure, the charge velocity of fracturing fluid, the injection of fracturing fluid
Pressure and the graph of a relation of time.
In the accompanying drawings, identical parts use identical reference.Accompanying drawing is not drawn according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
As it is shown in figure 1, fractured horizontal well physical modeling's sample 10 includes sillar 1, upper glued layer 2, pressure break
Sillar 3, lower glued layer 4, lower sillar 5 and tubing string 8.Tubing string 8 is preferably metal tube.
When production technique well pressure break physical modeling's sample 10, first, according to the target of the required simulation of experiment
Layer position, the overlying rock of destination layer position, the mechanical property of lower rock stratum of destination layer position are chosen and each rock stratum
The same or like three pieces of natural rock samples of mechanical property.
The natural rock sample same or like with the mechanical property of destination layer position is used for making pressure break sillar 3, with overlying
The natural rock sample that the mechanical property of rock stratum is identical is used for making sillar 1, identical with lower rock stratum mechanical property
Natural rock sample is used for making lower sillar 5.Upper sillar 1, pressure break sillar 3, lower sillar 5 are respectively used to simulate overlying
Rock stratum, destination layer position, lower rock stratum.
By three pieces of natural rock sample excision formings, form the upper sillar 1 of regular prism shape, pressure break sillar 3 and Xia Yan
Block 5.Upper sillar 1, pressure break sillar 3 and the bottom shape of lower sillar 5 and equivalently-sized.Lower sillar 5, pressure break
Sillar 3, upper sillar 1 the ratio of thickness equal to lower rock stratum, destination layer position, the ratio of thickness of overlying rock.
From the side 31 of pressure break sillar 3 to pressure break sillar 3 centre-drilling hole.As in figure 2 it is shown, thus in pressure
Split and sillar 3 is formed the blind hole 32 extending to pressure break sillar 3 center from this side 31.Blind hole 32 is used for simulating
Open hole wellbore.
Fluid sealant is coated on the periphery wall of tubing string 8, then tubing string 8 is inserted in blind hole 32, tubing string 8
It is not connected to the bottom of blind hole 32.So, after fluid sealant solidifies, the periphery wall of tubing string 8 and blind hole 32
Internal perisporium between formed seal.
Medium position at the upper bottom surface 35 of pressure break sillar 3 places upper gasket 6.Upper gasket 6 can be cushion
Circle, upper gasket 6 e.g. rubber ring.Full proppant is filled inside upper gasket 6.Proppant can be such as
Any one in quartz sand, haydite, organic proppant, walnut shell.It is positioned at upper gasket 6 at pressure break sillar 3
Outside upper bottom surface on applying paste form upper sealant layer.Upper sillar 1 is kept flat proppant and upper
On sealant layer, the bottom surface of upper sillar 1 is connected to proppant and upper sealant layer.The bottom surface of upper sillar 1
Parallel with the upper bottom surface of pressure break sillar 3.Each side of upper sillar 1 is corresponding with each side of pressure break sillar 3
Alignment.Distance between sillar 1 and pressure break sillar 3 in measurement, and it is adjusted to the upper cementing thickness preset
Degree e, it may be assumed that if this distance is less than the upper cementing layer thickness e preset, then increase the proppant in upper gasket 6, with
The thickness of the upper sealant layer of Shi Zengjia；If this distance is more than the thickness e of the upper glued layer preset, then reduce upper pad
Proppant in circle 6.So, after the fluid sealant solidification in upper sealant layer, glued layer 2 in formation, on
The thickness of glued layer 2 is equal to the upper cementing layer thickness e preset.Upper glued layer 2 includes being arranged on pressure break sillar 3
Upper bottom surface medium position and upper gasket 6 between upper sillar 1 and pressure break sillar 3, be arranged on pad
Enclose the proppant in 6 and be arranged between sillar 1 and pressure break sillar 3 and be positioned at outside upper gasket 6
Fluid sealant.
Lower gasket 7 is placed in the middle part of the upper bottom surface of lower sillar 5.Lower gasket 7 can be elastic washer, lower gasket
7 e.g. rubber rings.Full proppant is filled inside lower gasket 7.It is positioned at outside lower gasket 7 at lower sillar 5
Applying paste form lower seal glue-line on the upper bottom surface of side.Pressure break sillar 3 is kept flat proppant and under close
On adhesive layer, the bottom surface of pressure break sillar 3 is connected to proppant and lower seal glue-line.The upper bottom surface of lower sillar 5
Parallel with the bottom surface of pressure break sillar 3.Each side of lower sillar 5 is corresponding with each side of pressure break sillar 3
Alignment.Measure lower distance between sillar 5 and pressure break sillar 3, and be adjusted to the lower glued layer 4 preset
Thickness f, it may be assumed that if this distance is less than the lower glued layer 4 thickness f preset, then increase the proppant in lower gasket 7,
Increase the thickness of lower seal glue-line simultaneously；If this distance is more than setting glued layer thickness f in advance, then reduce lower gasket 7
Interior proppant.So, after the solidification of fluid sealant in lower seal glue-line, form lower glued layer 4, under cementing
The thickness of layer 4 is equal to the lower glued layer thickness f preset.Lower glued layer 4 includes being arranged on pressure break sillar 3 times
Bottom surface medium position and lower gasket 7 between lower sillar 5 and pressure break sillar 3, be arranged on lower gasket 7
In proppant and be arranged between lower sillar 5 and pressure break sillar 3 and be positioned at outside lower gasket 7 close
Sealing.
Thus, lower sillar 5, lower glued layer 4, pressure break sillar 3, upper glued layer 2, upper sillar 1 are from top to bottom
Stack gradually.Upper sillar 1 and pressure break sillar 3 are bonded together by upper glued layer 2, and lower glued layer 4 is by lower rock
Block 5 and pressure break sillar 3 are bonded together, and are thus made for fractured horizontal well physical modeling's sample 10.
In fracture simulation is tested, simulation pressue device to the side of fractured horizontal well physical modeling's sample 10 and
Above and below is simulated pressurization, and the liquid outlet of fracturing pump connects tubing string 8 and is not inserted into one end of pressure break sillar 3.
After opening fracturing pump, fracturing fluid is injected in pressure break sillar 3 by fracturing pump, and pressure break sillar 3 is by pressure break, fracturing fluid
Enter into along the crack of pressure break sillar 3 in the gap of proppant, upper sillar 1 and lower sillar 5 are pressed
Split.Tubing string 8 is for analog casing completion pit shaft.The end inserting pressure break sillar 3 from tubing string 8 of blind hole 32
The part of bottom to blind hole 32 is used for simulating barefoot interval.Upper cement plane is used for simulated target layer position and overlying
Aspect between rock stratum, lower cement plane is for the aspect between simulated target layer position and lower rock stratum.Owing to supporting
The particle diameter of agent is relatively big, has gap between proppant particles, and so, upper glued layer 2 and lower glued layer 4 are propping up
It is respectively formed high permeability area at support agent, can obtain when lamination splits fractured horizontal well physical modeling's sample 10 is worn
Lamination must be worn and split the response at upper glued layer 2 and lower glued layer 4, i.e. when fracturing liquid enters, tubing string 8
The injection pressure of porch there will be fluctuation, help fracture simulation experimental judgment to wear layer.It addition, proppant is filled out
It is full of upper gasket 6 and lower gasket 7, prevents simulating pressue device and fractured horizontal well physical modeling's sample 10 is carried out
Rock shearing is caused to destroy owing to space exists during simulation pressurization.Mould is carried out also by selecting intensity different sealing glue
Intend the cementation between the rock stratum of different lithology.
Fig. 3 shows in fracturing simulation test procedure, the charge velocity of fracturing fluid, the injection of fracturing fluid
Pressure and the graph of a relation of time.In this is tested, use coal along making upper sillar 1 and lower sillar 5, use
Sandstone makes pressure break sillar 3.Fracturing pump is used to inject fracturing fluid in tubing string 8, the injection speed of record fracturing fluid
Rate and the relation of time, record the injection pressure of fracturing fluid and the relation of time.After test completes, Ke Yiming
Aobvious observing extends up and down from blind hole 32 mouthfuls, and runs through sillar 1, lower sillar 5 and pressure break sillar
The crack of 3.Meanwhile, in figure 3 it can also be seen that the crack on pressure break sillar 3 extends through shape at proppant
The pressure drop of the injection pressure become.Then fracturing fluid continues to put aside energy at proppant, when crack is at upper sillar 1
With when lower sillar 5 is expanded, again show the pressure drop of obvious injection pressure.Demonstrate the present invention carrying out
Can obtain during fracture simulation test and judge that fracture extension is to response during aspect.
Preferably, in cutting process, sillar, pressure break sillar 3, upper sillar 1 are all cut into cube.
The fractured horizontal well physical modeling's sample 10 so made also is cube structure, is so easier at horizontal well
Three mutually orthogonal directions of pressure break physical modeling's sample 10 are simulated pressurization, and make stress distribution equal
Even.It is highly preferred that each bottom surface of lower sillar 5, pressure break sillar 3, upper sillar 1 equal to a is just being the length of side
Square.Lower sillar 5, pressure break sillar 3, upper sillar 1, upper glued layer 2, the thickness of lower glued layer 4 divide successively
Not Wei b, c, d, e, f, wherein
And a, b, c, d, e, f are respectively provided with identical long measure.Result in formation of an a length of a of rib
Fractured horizontal well physical modeling's sample 10 of the square bodily form.To lower sillar 5, pressure break sillar 3, upper sillar 1,
Upper glued layer 2, the thickness of lower glued layer 4 can obtain upper glued layer 2, lower glued layer 4 after being defined
Thickness sum and lower sillar 5, pressure break sillar 3, the relation of thickness sum of upper sillar 1, such horizontal well
Pressure break physical modeling's sample 10 simulates the thickness of each rock stratum simulated and the aspect power of adjacent two rock stratum
Learn relation between character.It is highly preferred that tubing string 8 is parallel to the upper bottom surface 35 of pressure break sillar 3 and is perpendicular to
The side 31 of pressure break sillar 3, and run through the center of this side 31.
It is highly preferred that blind hole 32 inserts the end length to the bottom of blind hole 32 of pressure break sillar 3 from tubing string 8
Scope isWhen fractured horizontal well physical modeling's sample 10 being worn lamination and splitting, with crack initiation at this
And as playing knick point, so can guarantee that the crack that pressure break sillar 3 generates can farthest extend to it upper and lower
Bottom surface, and fracturing fluid acts at upper and lower cementation interface, it is achieved and the purpose that lamination splits is worn in experiment.If it is long
Degree exceedes this scope, and its side is first extended in the crack the most easily making pressure break sillar 3 generate, and fracturing fluid is from this
Crack is flowed out and is made test failure.It is highly preferred that tubing string 8 stretches into the length range of the part in pressure break sillar 3
For
In a preferred embodiment, a=300mm.
Preferably, to insert the end of pressure break sillar 3 from tubing string 8 little to the diameter of the bottom of blind hole 32 for blind hole 32
In tubing string 8 external diameter.When drilling through this blind hole 32, on the sidewall of pressure break sillar 3, first drill through diameter than pipe
The small perforations 34 that the external diameter of post 8 is little, then drill through coaxial with small perforations 34, length less than small perforations and outer
Footpath is more than or equal to the big eyelet 33 of tubing string 8 external diameter, and this boring method is easily controlled big eyelet 33 and aperture
Eye 34 is coaxial, easily keep when sealing tubing string 8 annular space between tubing string 8 and big eyelet is evenly distributed from
And fluid sealant is evenly distributed.In blind hole 32, thus form step, after tubing string 8 is inserted into blind hole 32
Being connected to step, step plays position-limiting action.Meanwhile, control the length of macropore eye when drilling through, can be more smart
The true tubing string 8 that controls inserts the length of blind hole 32.
Preferably, fluid sealant was semi liquid state or cream before being applied to tubing string 8, pressure break sillar 3 and lower sillar 5
Shape, the fluid sealant of production technique well pressure break physical modeling's sample 10 is semi liquid state or paste in other words.So,
Fluid sealant, after being applied on rock, can be avoided it to penetrate in a large number and cause lithology to change inside the hole of rock
Become.The most also it is avoided that while being to seal tubing string 8, fluid sealant flows into the bottom of blind hole 32.It is highly preferred that
Fluid sealant is AB glue.
Preferably, in making, the natural rock sample of sillar 1 is identical with the Rock Species of overlying rock, makes lower sillar
The natural rock sample of 5 is identical with the Rock Species of lower rock stratum, make pressure break sillar 3 natural rock sample kind with
The Rock Species of destination layer position is identical.The rock mould using kind identical can press close to the rock knot of corresponding rock stratum
Structure so that go up sillar 1, lower sillar 5 and split the mechanical property of pressure sillar closer in its simulated rock stratum
Mechanical property.
Preferably, the angle between bed plane and the horizontal plane of destination layer position is equal to the bed plane of pressure break sillar 3
It is equal to the angle between the angle of the bottom surface of pressure break sillar 3, and/or the bed plane of lower rock stratum and horizontal plane
The angle of the bottom surface of the bed plane of lower sillar 5 and lower sillar 5, and/or the bed plane of overlying rock and horizontal plane
Between angle equal to the angle of the bottom surface of bed plane and the upper sillar 1 of upper sillar 1.So, cut out
The mechanical property of natural rock sample, closer to the rock stratum simulated, uses such fractured horizontal well physical modeling's sample
Product 10 carry out testing also can be more accurate.
Preferably, upper sillar 1, pressure break sillar 3, the bed plane of lower sillar 5 and the upper bottom surface of pressure break sillar 3
Parallel.Fractured horizontal well physical modeling's sample 10 can more accurately be simulated most bed plane and is parallel to level
The lower rock stratum in face, destination layer position and the mechanical characteristic of overlying rock.
So by reference to preferred embodiment, invention has been described, but in the feelings without departing from the scope of the present invention
Under condition, it can be carried out various improvement and parts therein can be replaced with equivalent.Especially, as long as
There is not structural hazard, the every technical characteristic being previously mentioned in each embodiment all can combine in any way
Come.The invention is not limited in specific embodiment disclosed herein, but include falling within the scope of the appended claims
All technical schemes.
Claims (10)
1. fractured horizontal well physical modeling's sample, it is characterised in that including: tubing string and stacking gradually
Lower sillar, lower glued layer, pressure break sillar, upper glued layer, upper sillar, wherein,
Described pressure break sillar includes extending to the blind of the center of described pressure break sillar from the side of described pressure break sillar
Hole,
One end of described tubing string is inserted described blind hole and is not connected to the bottom of blind hole, the periphery wall of described tubing string with
Seal between the internal perisporium of pressed blind hole,
Described upper glued layer includes being arranged between described upper sillar and described pressure break sillar and being positioned at described pressure
Split the upper gasket in the middle part of the upper bottom surface of sillar, the proppant being arranged in described upper gasket and be arranged on described
It is between upper sillar and described pressure break sillar and be positioned at the fluid sealant outside described upper gasket,
Described lower glued layer includes being arranged between described lower sillar and described pressure break sillar and being positioned at described pressure
Split the lower gasket in the middle part of the bottom surface of sillar, the proppant being arranged in described lower gasket and be arranged on described
Between lower sillar and described pressure break sillar and be positioned at the fluid sealant outside described lower gasket.
Fractured horizontal well physical modeling's sample the most according to claim 1, it is characterised in that under described
Sillar, described pressure break sillar and described upper sillar are cube.
Fractured horizontal well physical modeling's sample the most according to claim 2, it is characterised in that described pipe
Post is parallel to the upper bottom surface of described pressure break sillar and is perpendicular to described side, and runs through the center of described side.
4. according to the fractured horizontal well physical modeling's sample described in Claims 2 or 3, it is characterised in that institute
State lower sillar, described pressure break sillar, each bottom surface of described upper sillar are the length of side square equal to a, institute
State lower sillar, described pressure break sillar, described upper sillar, described upper glued layer, the thickness of described lower glued layer depend on
Secondary b, c, d, e, f of being respectively, wherein
The long measure of a, b, c, d, e, f is the most identical.
Fractured horizontal well physical modeling's sample the most according to claim 4, it is characterised in that from described
End in the tubing string described pressure break sillar of insertion to the length range of the bottom of described blind hole is
Fractured horizontal well physical modeling's sample the most according to claim 4, it is characterised in that a=300mm.
Fractured horizontal well physical modeling's sample the most according to any one of claim 1 to 3, its feature
It is, the described blind hole part from the end of the described tubing string described pressure break sillar of insertion to the bottom of described blind hole
Diameter is less than described tubing string external diameter.
Fractured horizontal well physical modeling's sample the most according to claim 1, it is characterised in that on described
Sillar, described pressure break sillar and described lower sillar are made by natural rock sample.
Fractured horizontal well physical modeling's sample the most according to any one of claim 1 to 3, its feature
Be, the bed plane of the bed plane of described upper sillar, the bed plane of described pressure break sillar and described lower sillar all with
The upper bottom surface of described pressure break sillar is parallel.
10. the method for production technique well pressure break physical modeling's sample, it is characterised in that comprise the following steps:
Destination layer position according to the required simulation of experiment, the overlying rock of destination layer position, the lower overlying strata of destination layer position
The mechanical property of layer chooses three pieces of natural rock samples, and respectively corresponding cut into the pressure break sillar of stratiform, upper sillar,
Lower sillar；
Drill through blind hole in the side of described pressure break sillar, tubing string is inserted in described hole, and in the week of described blind hole
Formed between the periphery wall of wall and described tubing string and seal；
The upper gasket filling full proppant is set at the middle part of the upper bottom surface of described pressure break sillar, at described upper gasket
Outside applying paste layer, the bottom surface of described upper sillar is covered on the proppant in described upper gasket；
The lower gasket filling full proppant is set at the middle part of the upper bottom surface of described lower sillar, in the outside of lower gasket
Applying paste layer, covers the bottom surface of described pressure break sillar on the proppant in described lower gasket.
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| CN108518209A (en) * | 2018-02-14 | 2018-09-11 | 中联煤层气有限责任公司 | Consider that the azimuthal design method of well track is adopted in the coal measures payzone combination of intermediate zone |
| CN110044671A (en) * | 2019-04-11 | 2019-07-23 | 武汉理工大学 | Coal petrography sample and preparation method thereof for hydraulic fracturing experiments |
| CN112145149A (en) * | 2020-08-21 | 2020-12-29 | 中国地质大学（武汉） | Multiphase multi-field coupling transportation process simulation device for geothermal reservoir |
| CN112761597A (en) * | 2021-01-12 | 2021-05-07 | 西南石油大学 | Horizontal well gas injection huff-puff oil extraction physical simulation experiment device |
| CN113914838A (en) * | 2020-07-09 | 2022-01-11 | 中国石油天然气股份有限公司 | Hydraulic fracturing experiment method, reservoir experiment sample, pouring equipment and preparation method |
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