CN103375165B - Single-fissure flow medium physical property fine control method - Google Patents
Single-fissure flow medium physical property fine control method Download PDFInfo
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Abstract
The invention discloses a kind of Single-fissure flow medium physical property fine control method, the method utilizes bonding agent and proppant to combine to realize the meticulous bonding and crack of sillar and accurately to formalize control, comes to accumulate permeability in fixing quantity man-made fracture aperture, crack by meticulous fixing quantity fracture support agent particle diameter, crack bonding agent consumption.The present invention adopts the meticulous bonding way of sillar to make seam, and bonding agent and proppant play crack accurately setting effect simultaneously.By using natural rock sample system of selection, can fixing quantity matrix permeability, matrix porosity.Two kinds of methods combining can fixing quantity crack conventional permeability, fracture porosity, permeability of fracture matrix system and crack-matrix system degree of porosity further.Utilize said method, the invention solves the physical property such as wall scroll crack and matrix sillar degree of porosity, permeability and be difficult to meticulous fixing quantity problem, and provide technical support for the relevant research field of all slits medium seepage flow.
Description
Technical field
The invention belongs to a kind of Novel physical experimental technique of Fractured medium seepage research, refer in particular to a kind of be applicable to all with the Single-fissure flow medium physical property fine control method of fisstured flow phenomenon about research field.
Background technology
Fractured geologic reservoir is prevalent in all over the world, is the hot issue of following research field: (1) water resources development; (2) underground pollution thing migration; (3) oil reservoir development; (4) underground heat hides exploitation and heat storage; (5) deep layer Earth Activities, such as earthquake, submarine hydrothermal solution etc.
Be different from and use single pore media, Fractured geologic reservoir is made up of the Fracture System of the matrix sillar and segmentation sillar with general pore structure, characterizes with dual media.In fissured porous medium, the basic characteristics of seepage flow are, the flowing of fluid in porous media completes mainly through crack, and the seepage flow characteristics in crack and flow event directly decide engineering development effect.
People are attempting utilizing fluid neuron network rule in physical experimental method fracture geologic reservoir to further investigate always.Fractured percolating medium is made up of crack and matrix, and therefore, the physical property such as degree of porosity, permeability of crack and matrix in the meticulous medium of control critical eigenvalue quantitatively, has become the matter of utmost importance of fluid neuron network research in Fractured geologic reservoir.
Before this, people make Fractured rock mass and mainly contain following three kinds of modes: the first, when artificial back-up sand makes rock mass, adds gap filler, after rock mass is carried out in sand, rethink way filler is wherein removed, then the space stayed is namely as crack; It two is utilize mechanical presses or stretching action in natural or artificial rock mass internal production crack; It three is with the stacked formation wall scroll of the flat board of various material or singly organizes crack.These methods are all difficult to the meticulous hole controlling wall scroll crack and matrix quantitatively and ooze parameter.
Summary of the invention
The technical problem that the present invention solves is: provide a kind of Single-fissure flow medium physical property fine control method, to solve the problem that the physical property such as wall scroll crack and matrix sillar degree of porosity, permeability is difficult to meticulous fixing quantity, improve or overcome the one or more defect of prior art.
Technical solution of the present invention is: a kind of Single-fissure flow medium physical property fine control method, the method utilizes bonding agent and proppant to combine to realize the meticulous bonding and crack of sillar and accurately to formalize control, comes to accumulate permeability in fixing quantity man-made fracture aperture, crack by meticulous fixing quantity fracture support agent particle diameter, crack bonding agent consumption.
Preferably, the method comprises the following steps:
(1) natural rock sample is selected to prepare with sillar: the natural rock sample of physical property needed for selecting is processed into make and stitches required sillar;
(2) Chosen Point glue position: determine that rectangle sillar burnishing surface geometric center is for a glue position;
(3) make some sealing rubber die, this sealing rubber die is the round-meshed hard sheet of tool, utilizes this circular hole control point glue amount;
(4) place proppant: hard sheet is pressed close to sillar burnishing surface, the circular hole center of circle of thin plate is coincide with some glue geometry of position center; According to the particle diameter of required man-made fracture aperture determination proppant, in circular hole, place proppant;
(5) cementing agent injects: after placing proppant, add required bonding agent in circular hole;
(6) artificial seam setting: applied thrust directly over glue point, makes crack interface mutually press close to, to embody the supporting role of proppant; Make pull and push dynamometer keep predetermined pressure, until bonding agent solidifies, man-made fracture formalizes.
The features and advantages of the invention are: the present invention adopts the meticulous bonding way of sillar to make seam, and bonding agent and proppant play crack accurately setting effect simultaneously.By meticulous fixing quantity fracture support agent particle diameter, crack bonding agent consumption and bonding time pressurization dynamics, can fixing quantity man-made fracture aperture, accumulate the physical property such as permeability in crack; Keep bonding agent consumption and bonding time pressurization dynamics constant, by regulating proppant particle diameter, accurately can obtain the man-made fracture of specifying physical property.By using natural rock sample system of selection, can fixing quantity matrix permeability, matrix porosity.Two kinds of methods combining can fixing quantity crack conventional permeability, fracture porosity, permeability of fracture matrix system and crack-matrix system degree of porosity further.
Single-fissure flow medium physical property fine control method of the present invention, provide producing principle and detailed making step, solve the physical property such as wall scroll crack and matrix sillar degree of porosity, permeability and be difficult to meticulous fixing quantity problem, and provide technical support for the relevant research field of all slits medium seepage flow.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that in the present invention, seam step is made in sillar docking.
Fig. 2 determines a schematic diagram for glue position step in the present invention.
The schematic diagram of the hard sheet (some sealing rubber die) of band circular hole of Fig. 3 for being formed in the present invention.
Fig. 4 is the schematic diagram of the present invention's placing glass microballon in circular hole.
Fig. 5 A, Fig. 5 B are top view and the schematic side view of fine-point glue step in the present invention.
Fig. 6 is the schematic diagram that in the present invention, high accuracy pull and push dynamometer is accurately pressurizeed.
Fig. 7 is the schematic flow sheet of monolete medium displacement test in the present invention.
Fig. 8 accumulates permeability experiment value and theoretical value relativity schematic diagram in crack in the present invention.
Fig. 9 is that in the present invention, monolete rock core can repeat to make the result schematic diagram.
Detailed description of the invention
The present invention proposes a kind of Single-fissure flow medium physical property fine control method, the method utilizes bonding agent and proppant to combine to realize the meticulous bonding and crack of sillar and accurately to formalize control, comes to accumulate permeability in fixing quantity man-made fracture aperture, crack by meticulous fixing quantity fracture support agent particle diameter, crack bonding agent consumption.Dynamics of pressurizeing when described method comprises bonding by meticulous fixing quantity alternatively to accumulate permeability in fixing quantity man-made fracture aperture, crack, wherein, keep bonding agent consumption and bonding time pressurization dynamics constant, by regulating proppant particle diameter, accurately can obtain the man-made fracture of specifying physical property.This cover technical method provided by the present invention, make laboratory carry out in the physical analogy of Fractured geologic reservoir, meticulous fixing quantity wall scroll crack and the various physical property of Fractured medium become possibility; And the present invention utilizes that sillar is meticulous bondingly makes seam technology, under bonding agent and proppant act on, achieves crack accurately setting effect simultaneously, thus achieve the accurate quantification of the various physical property of monolete percolating medium is controlled.
In addition, this control method of the present invention preferably first utilizes natural rock sample system of selection to come fixing quantity matrix permeability, matrix porosity according to actual needs; Thus, make seam by the meticulous bonding way of aforesaid sillar and two kinds of methods combining selected by natural rock sample, come fixing quantity crack conventional permeability, fracture porosity, permeability of fracture matrix system and crack-matrix system degree of porosity.
The method that the present invention proposes can realize Fractured percolating medium crack, the meticulous fixing quantity of each physical property of matrix, and specify physical property fracture medium repeat make.
In one embodiment of this invention, the method comprises the following steps:
(1) natural rock sample is selected to prepare with sillar: the natural rock sample of physical property needed for selecting is processed into make and stitches required sillar;
(2) Chosen Point glue position: determine that rectangle sillar burnishing surface geometric center is for a glue position;
(3) make some sealing rubber die, this sealing rubber die is the round-meshed hard sheet of tool, utilizes this circular hole control point glue amount;
(4) place proppant: hard sheet is pressed close to sillar burnishing surface, the circular hole center of circle of thin plate is coincide with some glue geometry of position center; According to the particle diameter of required man-made fracture aperture determination proppant, in circular hole, place proppant;
(5) cementing agent injects: after placing proppant, add required bonding agent in circular hole;
(6) artificial seam setting: applied thrust directly over glue point, makes crack interface mutually press close to, to embody the supporting role of proppant; Make pull and push dynamometer keep predetermined pressure, until bonding agent solidifies, man-made fracture formalizes.
Utilize above-mentioned Single-fissure flow medium physical property fine control method, the physical property such as wall scroll crack and matrix sillar degree of porosity, permeability can be solved and be difficult to meticulous fixing quantity problem, and provide technical support for the research field that all slits medium seepage flow is relevant.
Drawings and the specific embodiments are coordinated to be described in further detail specific embodiment of the invention step below.
In the present embodiment, this Single-fissure flow medium physical property fine control method specifically comprises the following steps:
(1) natural rock sample is selected to prepare with sillar
Investigate the physical property such as various natural rock sample permeability, degree of porosity, select required natural rock sample (the permeability K of physical property
m, degree of porosity φ
m), be processed into and make the required sillar 1 of seam, require that interface is smooth, as shown in Figure 1.
(2) put glue position to select
Determine that rectangle sillar burnishing surface geometric center is for some glue position 10, as shown in Figure 2, so that man-made fracture is stablized when pressurizeing bonding, makes fracture aperture on fracture surface be consistent everywhere.
(3) some glue amount precise controlling is realized by some sealing rubber die
Choose hard sheet, its thickness is B (being greater than proppant particle diameter b).After specified point colloid accumulated amount (trace) m, hard sheet makes radius is
circular hole 20, band circular hole hard sheet 2 be a sealing rubber die, see Fig. 3.
(4) fracture aperture precise controlling mode
Hard sheet 2 is pressed close to sillar burnishing surface, the center of circle of thin plate circular hole 20 is coincide with the geometric center of some glue position 10.After determining man-made fracture aperture b, in circular hole 20, place the circular glass microballon 3 that the corresponding particle diameter of one deck is b, as shown in Figure 4.Glass microballoon 3 plays the effect of supporting crack, and the particle diameter of glass microballoon 3 is man-made fracture aperture (dimensional accuracy can be controlled to a μm level).
(5) bonding agent is selected and is added
After placing glass microballon 3, in circular hole 20, add required bonding agent 4, and ensure that the end face of bonding agent 4 in circular hole 20 is equal with the end face of circular hole 20 surrounding thin plate 2, as shown in Fig. 5 A, Fig. 5 B.Cross conference due to bonding agent viscosity and affect glass microballoon support effect, the too small meeting of viscosity causes bonding agent to be difficult to fix, and therefore, the present invention preferably adopts 302 modified acrylic ester adhesion agents.
(6) bonding pressure precise controlling
Use high accuracy pull and push dynamometer 5, applied thrust directly over glue point, makes crack interface mutually press close to, thus embodies the supporting role of glass microballoon 3.In the present embodiment, also by the support gear 51 above adjustment pull and push dynamometer 5, accurately to control thrust (control accuracy such as can be 0.01N), as shown in Figure 6.Pressure is crossed conference and is crushed by glass microballoon 3, affects support effect, recommendation bonding pressure 180-220N, and the present embodiment adopts the bonding pressure of 200.00N.
(7) artificial seam setting
As shown in Figure 6, make high accuracy pull and push dynamometer 5 keep the pressure of step (six), until bonding agent solidifies, man-made fracture formalizes.
This completes the manufacturing process of monolete rock core 100.
The each physical parameter characteristic manner of monolete percolating medium as shown in appendix 1.
Subordinate list 1 monolete percolating medium precise controlling physical property table
| Monolete percolating medium physical property | Precise controlling numerical value |
| Fracture length | a |
| Fracture aperture | b |
| Permeability K is accumulate in crack ff | b 2/12 |
| The conventional permeability K in crack f | b 3/12h |
| Fracture porosity φ f | b/h |
| Permeability of fracture matrix system K t | K m+b 3/12h |
| Crack-matrix system degree of porosity φ t | φ m+(1-φ m)b/h |
For the monolete percolating medium made via above-mentioned specific embodiment of the present invention, its physical property can utilize following method to verify:
(1) experiment and theory are verified mutually
1 experimental design
Adopt above-mentioned preparation method, 40 orders, 60 orders, 80 orders, 100 orders, 120 orders, 140 orders, 160 orders, 180 orders and 200 order glass microballoons (order number and particle diameter corresponding relation see attached list 2) are selected to make monolete percolating medium, the apparatus structure of concrete monolete medium displacement test and experiment flow are as shown in Figure 7, wherein, minute-pressure displacement system 200 is by the crack place of pipeline 101 with monolete rock core 100, and utilize pipeline to be drained to graduated cylinder 300 in the downstream in crack, to measure the Fluid Volume flowed out by crack.Because the concrete structure of each several part can utilize existing various ways to realize, so place repeats no longer one by one.
Subordinate list 2 glass microballoon order number and particle diameter corresponding relation
| Order number | 40 | 60 | 80 | 100 | 120 | 140 | 160 | 180 | 200 |
| Particle diameter (μm) | 420 | 250 | 178 | 150 | 124 | 104 | 96 | 84 | 74 |
2 interpretations of result
Each monolete rock core 100 sees attached list 3 in displacement pressure 0.032atm down-off.
The flow of the various monolete percolating mediums of subordinate list 3 under minute-pressure displacement
Shown in composition graphs 7 and subordinate list 3, when fluid flow media only has length to be L
1+ L
2pipeline time, flow is 118.00ml/min.According to the water power principle of similitude, pipe flow will dynamic resistance can be drawn by formula 1.
In formula, Δ p is displacement pressure; Q
0for flow when flow media only has pipeline; R
0for pipe flow will dynamic resistance.
When fluid flow media be pipeline be connected with monolete rock core time, monolete rock core two ends effective displacement pressure can be drawn, in table 4 according to following formula (2).
In formula, Δ p
1for monolete rock core two ends effective displacement pressure; Q
1for pipeline is connected as flow during flow media with monolete rock core; R
1for monolete rock core flow resistance.
Effective displacement pressure reduction corresponding to subordinate list 4 different-grain diameter glass microballoon
| Glass microballoon order number | Effective displacement pressure reduction (atm) | Flow (ml/min) |
| 40 | 0.0030 | 107 |
| 60 | 0.0091 | 84.50 |
| 80 | 0.0153 | 61.50 |
| 100 | 0.0220 | 37.00 |
| 120 | 0.0262 | 21.50 |
| 140 | 0.0286 | 12.50 |
| 160 | 0.0297 | 8.55 |
| 180 | 0.0306 | 5.00 |
| 200 | 0.0308 | 4.60 |
According to following formula (3) (reaching two formula), can obtain in experiment and accumulate permeability in each crack.According to theoretical formula K
ff=b
2/ 12, can obtain in each crack and accumulate permeability theoretical value.Experiment value and theoretical value relativity are as shown in Figure 8.This monolete percolating medium preparation method fracture permeability can carry out meticulous fixing quantity as shown in Figure 8.
In formula, a is fracture length (being 5cm in experiment); B is fracture aperture (being particle size of glass microspheres in experiment); μ is fluid viscosity (being 1mPas in experiment); Δ L is rock core length (being 5cm in experiment); K
fffor accumulateing permeability in crack.
(2) repeatable checking
According to this preparation method, select 40 orders, 60 orders, 80 orders, 100 orders, 120 orders, 140 orders, 160 orders, 180 orders and 200 order glass microballoons, repeat making the 2nd group of monolete percolating medium.Adopt and the 1st group of identical experiment condition, measure the 2nd group of monolete rock core flow.With the 1st group of flow for benchmark, often plant monolete rock core flow relative size as shown in Figure 9 for the 2nd group.
This preparation method can repeat to make and specify physical property monolete rock core as shown in Figure 9, proves that the method can realize meticulous fixing quantity to monolete percolating medium physical property again.
In sum, the present invention has following characteristics and advantage:
(1) the invention provides a set of technical method, make laboratory carry out in the physical analogy of Fractured geologic reservoir, meticulous fixing quantity wall scroll crack and the various physical property of Fractured medium become possibility.
(2) utilize that sillar is meticulous bondingly makes seam technology, under bonding agent and proppant act on, achieve crack accurately setting effect simultaneously, thus achieve the accurate quantification of the various physical property of monolete percolating medium is controlled.
(3) The present invention gives detailed, quantitative, exercisable technical method and implementation step.
(4) the present invention is applicable to all research fields relevant with Fractured geologic reservoir fluid neuron network.
Although the present invention discloses with specific embodiment; but it is also not used to limit the present invention; any those skilled in the art; the displacement of equivalent assemblies done under the prerequisite not departing from the spirit and scope of the present invention; or the equivalent variations to do according to scope of patent protection of the present invention and modification, all still should belong to the category that this patent is contained.
Claims (10)
1. a Single-fissure flow medium physical property fine control method, it is characterized in that, the method utilizes bonding agent and proppant to combine to realize the meticulous bonding and crack of sillar and accurately to formalize control, comes to accumulate permeability in fixing quantity man-made fracture aperture, crack by meticulous fixing quantity fracture support agent particle diameter, crack bonding agent consumption and pressurization dynamics; Wherein, keep bonding agent consumption and bonding time pressurization dynamics constant, by regulating proppant particle diameter, accurately can obtain the man-made fracture of specifying physical property; The method comprises the following steps:
(1) natural rock sample is selected to prepare with sillar: the natural rock sample of physical property needed for selecting is processed into make and stitches required rectangle sillar;
(2) Chosen Point glue position: determine that rectangle sillar burnishing surface geometric center is for a glue position;
(3) make some sealing rubber die, this sealing rubber die is the round-meshed hard sheet of tool, utilizes this circular hole control point glue amount;
(4) place proppant: hard sheet is pressed close to sillar burnishing surface, the circular hole center of circle of thin plate is coincide with some glue geometry of position center; According to the particle diameter of required man-made fracture aperture determination proppant, in circular hole, place proppant;
(5) cementing agent injects: after placing proppant, add required bonding agent in circular hole;
(6) artificial seam setting: applied thrust directly over glue point, makes crack interface mutually press close to, to embody the supporting role of proppant; Make pull and push dynamometer keep predetermined pressure, until bonding agent solidifies, man-made fracture formalizes.
2. Single-fissure flow medium physical property fine control method as claimed in claim 1, is characterized in that, in described step (three), is choose the hard sheet that thickness B is greater than proppant particle diameter to make a sealing rubber die; Circle hole radius r on described hard sheet determines according to a colloid accumulated amount m:
3. Single-fissure flow medium physical property fine control method as claimed in claim 1, it is characterized in that, described proppant is circular glass microballon, particle size of glass microspheres equals described man-made fracture aperture, in described step (four), be the circular glass microballon placing the corresponding particle diameter of one deck in circular hole, described glass microballoon plays the effect of supporting crack.
4. Single-fissure flow medium physical property fine control method as claimed in claim 1, it is characterized in that, in described step (five), be make the bonding agent end face in described circular hole equal with the end face of circular thin plate when adding cementing agent.
5. Single-fissure flow medium physical property fine control method as claimed in claim 1, it is characterized in that, in described step (six), adopt high accuracy pull and push dynamometer applied thrust directly over glue point, crack interface pressed close to mutually thus embodies glass microballoon supporting role, in this process, using pull and push dynamometer to keep pressure to be 180-220N.
6. Single-fissure flow medium physical property fine control method as claimed in claim 1, is characterized in that,
Described step (one) comprise further:
Investigate the physical property of various natural rock sample, to select the natural rock sample of required physical property; Be processed into when making the required sillar of seam, require that interface is smooth;
Described step (two) comprise further:
Determine rectangle sillar burnishing surface geometric center for man-made fracture when a point glue position is for the ease of pressurizeing bonding stable and on fracture surface fracture aperture be consistent everywhere;
Described step (three) comprise further:
Choose the hard sheet that thickness is B, and thickness B is greater than proppant particle diameter; After specified point colloid accumulated amount m, hard sheet makes radius is
circular hole, the hard sheet of band circular hole is a sealing rubber die, utilizes this sealing rubber die to realize some glue amount precise controlling;
Described step (four) comprise further:
As the particle diameter value of the glass microballoon of proppant in determined man-made fracture aperture, in circular hole, place the circular glass microballon of the corresponding particle diameter of one deck, glass microballoon plays the effect of supporting crack;
Described step (five) comprise further:
After placing glass microballon, in circular hole, add required bonding agent, and ensure that in circular hole, bonding agent end face is equal with circular sheet top surface;
Described step (six) comprise further:
Use the high accuracy pull and push dynamometer that control accuracy is 0.01N, applied thrust directly over glue point; Adjusting pole gear accurately controls thrust, uses pull and push dynamometer to keep pressure to be 200.00N; High accuracy pull and push dynamometer is made to keep 200.00N pressure, until bonding agent solidifies.
7. Single-fissure flow medium physical property fine control method as claimed in claim 6, it is characterized in that, in described step (five), be select 302 modified acrylic ester adhesion agents.
8. Single-fissure flow medium physical property fine control method as claimed in claim 1, it is characterized in that, the method also comprises to be verified prepared monolete percolating medium.
9. Single-fissure flow medium physical property fine control method as claimed in claim 8, it is characterized in that, described checking comprises the experimental verification to this percolating medium physical property, and it is contrasted the experiment value and theoretical value that accumulate permeability in crack.
10. Single-fissure flow medium physical property fine control method as claimed in claim 8, is characterized in that, described checking comprises repeatable checking.
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| CN106285662B (en) * | 2016-08-30 | 2018-11-27 | 中国石油大学(北京) | Fractured reservoir physical model splits storage than quantitative control methodin and device |
| CN108729914B (en) * | 2018-07-06 | 2023-04-21 | 中国石油大学(北京) | Monitoring system and method for core seam length |
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| CN101892836A (en) * | 2009-12-16 | 2010-11-24 | 中国石油大学(北京) | Method for preparing large-scale porous percolating medium |
| CN101892828A (en) * | 2010-05-25 | 2010-11-24 | 中国石油大学(北京) | Preparation method of anisotropic seepage medium with slits |
| CN101984217A (en) * | 2010-03-22 | 2011-03-09 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Core pretreatment method for fractured reservoir damage evaluation |
| CN102031956A (en) * | 2010-06-30 | 2011-04-27 | 中国石油大学(北京) | Built-in method of oil deposit physical model mineshaft |
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| CN101892836A (en) * | 2009-12-16 | 2010-11-24 | 中国石油大学(北京) | Method for preparing large-scale porous percolating medium |
| CN101984217A (en) * | 2010-03-22 | 2011-03-09 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Core pretreatment method for fractured reservoir damage evaluation |
| CN101892828A (en) * | 2010-05-25 | 2010-11-24 | 中国石油大学(北京) | Preparation method of anisotropic seepage medium with slits |
| CN102031956A (en) * | 2010-06-30 | 2011-04-27 | 中国石油大学(北京) | Built-in method of oil deposit physical model mineshaft |
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