CN103375165A - 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 single-fissure flow medium physical property fine control method. By means of the single-fissure flow medium physical property fine control method, adhesives and propping agents are combined to achieve fine bonding of rocks and accurate setting control of fissures, and aperture of manual fissures and internal implication permeability of the fissures can be quantitatively controlled by controlling grain size of the propping agents of the fissures and amount of the fissure adhesives in a fine and quantitative mode. By means of the single-fissure flow medium physical property fine control method, the fissures are created in a rock fine bonding mode, and the adhesives and the propping agents both have the accurate fissure setting effect. By adopting a natural rock sample selection method, matrix permeability and matrix porosity can be quantitatively controlled. Regular permeability of the fissures, fissure porosity, fissure-matrix system permeability and fissure-matrix system porosity can be further quantitatively controlled by combining the two methods. The single-fissure flow medium physical property fine control method solves the problem that physical properties like porosity and permeability of single fissures and matrix racks cannot be controlled in a fine and quantitative mode and provides technology support for all research fields relative to fissure medium 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 all and meticulous control method of monolete percolating medium physical property of the relevant research field of fisstured flow phenomenon of being applicable to.
Background technology
The 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 is hidden exploitation and heat storage; (5) deep layer Earth Activities is such as earthquake, submarine hydrothermal solution etc.
Be different from and use single pore media, the Fractured geologic reservoir is comprised of the matrix sillar with general pore structure and the Fracture System of cutting apart sillar, characterizes with dual media.The basic characteristics of seepage flow are in the fissured porous medium, and fluid flowing in porous media mainly finished by the crack, and the seepage flow characteristics in crack and flow event are directly determining the engineering development effect.
People are attempting utilizing in the physical experimental method fracture geologic reservoir fluid percolation law to further investigate always.The Fractured percolating medium is comprised of crack and matrix, and therefore, the physical property such as the meticulous degree of porosity of controlling quantitatively crack and matrix in the Fractured medium, permeability has become the matter of utmost importance of fluid seepage research in the Fractured geologic reservoir.
Before this, people make the Fractured rock mass and mainly contain following three kinds of modes: the first adds gap filler, after rock mass is carried out in sand when rock mass is made in artificial back-up sand, rethink way filler is wherein removed, the space that then stays is namely as the crack; It two is to utilize mechanical presses or stretching action in natural or artificial rock mass internal production crack; It three is with the dull and stereotyped stacked formation wall scroll of various materials or single group crack.These methods all are difficult to the meticulous hole of controlling quantitatively wall scroll crack and matrix and ooze parameter.
Summary of the invention
The technical problem that the present invention solves is: provide a kind of monolete percolating medium physical property meticulous control method, the one or more defective of prior art is improved or overcome to the problem that is difficult to meticulous quantitative control to solve the physical property such as wall scroll crack and matrix sillar degree of porosity, permeability.
Technical solution of the present invention is: the meticulous control method of a kind of monolete percolating medium physical property, the method utilizes bonding agent and proppant to combine to realize the control that accurately formalizes of the meticulous bonding and crack of sillar, quantitatively controls in man-made fracture aperture, the crack and accumulates permeability by meticulous quantitative control crack proppant particle diameter, crack bonding agent consumption.
Preferably, the method comprises the following steps:
(1) natural rock sample is selected and the sillar preparation: select the natural rock sample of required physical property to be processed into and make the required sillar of seam;
(2) Chosen Point glue position: determine that rectangle sillar burnishing surface geometric center is a glue position;
(3) make the 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 the sillar burnishing surface, the circular hole center of circle of thin plate and some glue geometry of position center are coincide; Determine the particle diameter of proppant according to required man-made fracture aperture, 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 presses close to the crack interface, to embody the supporting role of proppant mutually; Make pull and push dynamometer keep predetermined pressure, until bonding agent solidifies the man-made fracture setting.
Characteristics of the present invention and advantage are: the present invention adopts the meticulous bonding way of sillar to make seam, and bonding agent and proppant play accurately setting effect of crack simultaneously.By meticulous quantitative control crack proppant particle diameter, crack bonding agent consumption and pressurization dynamics when bonding, can quantitatively control physical property such as accumulateing permeability in man-made fracture aperture, the crack; Keep the bonding agent consumption and when bonding the pressurization dynamics constant, by regulating the proppant particle diameter, can accurately obtain to specify the man-made fracture of physical property.By using natural rock sample system of selection, can quantitatively control matrix permeability, matrix porosity.Two kinds of methods are in conjunction with can further quantitatively controlling the conventional permeability in crack, fracture porosity, permeability of fracture matrix system and crack-matrix system degree of porosity.
The meticulous control method of monolete percolating medium physical property 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 quantitative control problem, and provide technical support for the relevant research field of all slits medium seepage flow.
Description of drawings
Fig. 1 is the schematic diagram that the seam step is made in the sillar docking among the present invention.
Fig. 2 is the schematic diagram of determining some glue position step among the present invention.
Fig. 3 is the schematic diagram of formed hard sheet with circular hole among the present invention (some sealing rubber die).
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 among the present invention.
Fig. 6 is the schematic diagram that the high accuracy pull and push dynamometer is accurately pressurizeed among the present invention.
Fig. 7 is the schematic flow sheet of monolete medium displacement test among the present invention.
Fig. 8 accumulates permeability experiment value and theoretical value relativity schematic diagram in the crack among the present invention.
Fig. 9 is that the monolete rock core can repeat to make the result schematic diagram among the present invention.
The specific embodiment
The present invention proposes the meticulous control method of a kind of monolete percolating medium physical property, the method utilizes bonding agent and proppant to combine to realize the control that accurately formalizes of the meticulous bonding and crack of sillar, quantitatively controls in man-made fracture aperture, the crack and accumulates permeability by meticulous quantitative control crack proppant particle diameter, crack bonding agent consumption.Described method comprises alternatively that the pressurization dynamics is quantitatively controlled in man-made fracture aperture, the crack when bonding by meticulous quantitative control and accumulates permeability, wherein, keep the bonding agent consumption and when bonding the pressurization dynamics constant, by regulating the proppant particle diameter, can accurately obtain to specify the man-made fracture of physical property.The cover technical method that is somebody's turn to do provided by the present invention carries out in the physical analogy of Fractured geologic reservoir the laboratory, and meticulous quantitative control wall scroll crack and the various physical property of Fractured medium become possibility; And the present invention utilizes the meticulous bonding seam technology of making of sillar, under bonding agent and proppant act on simultaneously, has realized accurately setting effect of crack, thereby has realized the accurate quantification control to the various physical property of monolete percolating medium.
In addition, this control method of the present invention preferably first utilizes natural rock sample system of selection quantitatively to control matrix permeability, matrix porosity according to actual needs; Thus, make seam and two kinds of method combinations of natural rock sample selection by the meticulous bonding way of aforesaid sillar, quantitatively control the conventional permeability in crack, 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 quantitative control of each physical property of matrix, and the making that repeats of specifying the physical property fracture medium.
In one embodiment of this invention, the method comprises the following steps:
(1) natural rock sample is selected and the sillar preparation: select the natural rock sample of required physical property to be processed into and make the required sillar of seam;
(2) Chosen Point glue position: determine that rectangle sillar burnishing surface geometric center is a glue position;
(3) make the 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 the sillar burnishing surface, the circular hole center of circle of thin plate and some glue geometry of position center are coincide; Determine the particle diameter of proppant according to required man-made fracture aperture, 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 presses close to the crack interface, to embody the supporting role of proppant mutually; Make pull and push dynamometer keep predetermined pressure, until bonding agent solidifies the man-made fracture setting.
Utilize the meticulous control method of above-mentioned monolete percolating medium physical property, can solve the physical property such as wall scroll crack and matrix sillar degree of porosity, permeability and be difficult to meticulous quantitative control problem, and provide technical support for the relevant research field of all slits medium seepage flow.
The below cooperates drawings and the specific embodiments that implementation step of the present invention is described in further detail.
In the present embodiment, the meticulous control method of this monolete percolating medium physical property specifically may further comprise the steps:
(1) natural rock sample is selected and the sillar preparation
Investigate the physical property such as various natural rock sample permeabilities, degree of porosity, select natural rock sample (the permeability K of required physical property
m, degree of porosity φ
m), be processed into and make the required sillar 1 of seam, require interface smooth, as shown in Figure 1.
(2) some glue position is selected
Determine that rectangle sillar burnishing surface geometric center is a some glue position 10, as shown in Figure 2, so that the man-made fracture of pressurizeing when bonding is stable, so that fracture aperture is consistent on the fracture surface everywhere.
(3) realize the meticulous control of some glue amount by the some sealing rubber die
Choose hard sheet, its thickness is B (greater than proppant particle diameter b).Behind specified point colloid accumulated amount (trace) m, at hard sheet making radius be
Circular hole 20, be a sealing rubber die with the hard sheet 2 of circular hole, see Fig. 3.
(4) the meticulous control mode of fracture aperture
(5) bonding agent is selected and is added
Behind the placing glass microballon 3, in circular hole 20, add required bonding agent 4, and guarantee that the end face of bonding agent 4 in the circular hole 20 is equal with the end face of thin plate 2 around the circular hole 20, shown in Fig. 5 A, Fig. 5 B.Because bonding agent viscosity is crossed conference and affected the 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) the meticulous control of bonding pressure
Use high accuracy pull and push dynamometer 5, applied thrust directly over glue point is pressed close to the crack interface mutually, thereby embodies the supporting role of glass microballoon 3.In the present embodiment, also can be by adjusting the support gear 51 of pull and push dynamometer 5 tops, with accurate control thrust (control accuracy for example can be 0.01N), as shown in Figure 6.Pressure is crossed conference with glass microballoon 3 crushing, affects support effect, recommendation bonding pressure 180-220N, and 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.
Finished thus the manufacturing process of monolete rock core 100.
Each physical parameter characteristic manner of monolete percolating medium is shown in subordinate list 1.
The meticulous control physical property of subordinate list 1 monolete percolating medium table
| Monolete percolating medium physical property | Meticulous control numerical value |
| Fracture length | a |
| Fracture aperture | b |
| Accumulate permeability K in the 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 of making via above-mentioned specific embodiment of the present invention, its physical property can utilize following method to verify:
(1) experiment and theoretical mutually checking
1 experimental design
Adopt above-mentioned preparation method, select 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) to make the 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 the pipeline drainage to graduated cylinder 300 in the downstream in crack, to measure the Fluid Volume that flows out by the crack.Because the concrete structure of each several part can utilize existing various ways to realize, so locate to give unnecessary details no longer one by one.
| The |
40 | 60 | 80 | 100 | 120 | 140 | 160 | 180 | 200 |
| Particle diameter (μ m) | 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 subordinate list 3 various monolete percolating mediums under the minute-pressure displacement
Shown in Fig. 7 and subordinate list 3, be L when the Fluid Flow in A medium only has length
1+ L
2Pipeline the time, flow is 118.00ml/min.According to the water power principle of similitude, can draw the pipe flow will dynamic resistance by formula 1.
In the formula, Δ p is displacement pressure; Q
0Flow when only having pipeline for flow media; R
0Be the pipe flow will dynamic resistance.
When the Fluid Flow in A medium is pipeline when linking to each other with the monolete rock core, can draw monolete rock core two ends effective displacement pressure according to following formula (2), see Table 4.
In the formula, Δ p
1Be monolete rock core two ends effective displacement pressure; Q
1Flow when linking to each other as flow media for pipeline with the monolete rock core; R
1Be monolete rock core flow resistance.
The corresponding effective displacement pressure reduction of subordinate list 4 different-grain diameter glass microballoons
| 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 the experiment and accumulate permeability in each crack.According to theoretical formula K
Ff=b
2/ 12, can obtain and accumulate the permeability theoretical value in each crack.Experiment value and theoretical value relativity are as shown in Figure 8.This monolete percolating medium preparation method can the fracture permeability be carried out meticulous quantitative control as shown in Figure 8.
In the formula, a is fracture length (being 5cm in the experiment); B is fracture aperture (being the glass microballoon particle diameter in the experiment); μ is fluid viscosity (being 1mPas in the experiment); Δ L is rock core length (being 5cm in the experiment); K
FfFor accumulateing permeability in the 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 to make 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.Take the 1st group of flow as benchmark, the 2nd group every kind monolete rock core flow relative size as shown in Figure 9.
This preparation method can repeat to make and specify physical property monolete rock core as shown in Figure 9, proves that again the method can realize meticulous quantitative control to monolete percolating medium physical property.
In sum, the present invention has following characteristics and advantage:
(1) the invention provides a cover technical method, the laboratory is carried out in the physical analogy of Fractured geologic reservoir, meticulous quantitative control wall scroll crack and the various physical property of Fractured medium become possibility.
(2) utilize the meticulous bonding seam technology of making of sillar, under bonding agent and proppant act on simultaneously, realized accurately setting effect of crack, thereby realized the accurate quantification control to the various physical property of monolete percolating medium.
(3) the present invention has provided detailed, quantitative, exercisable technical method and implementation step.
(4) the present invention is applicable to all research fields relevant with Fractured geologic reservoir fluid seepage flow.
Although the present invention discloses with specific embodiment; but it is not to limit the present invention; any those skilled in the art; the displacement of the equivalent assemblies of under the prerequisite that does not break away from the spirit and scope of the present invention, having done; or according to equivalent variations and modification that scope of patent protection of the present invention is done, all should still belong to the category that this patent is contained.
Claims (13)
1. meticulous control method of monolete percolating medium physical property, it is characterized in that, the method utilizes bonding agent and proppant to combine to realize the control that accurately formalizes of the meticulous bonding and crack of sillar, quantitatively controls in man-made fracture aperture, the crack and accumulates permeability by meticulous quantitative control crack proppant particle diameter, crack bonding agent consumption.
2. the meticulous control method of monolete percolating medium physical property as claimed in claim 1, it is characterized in that, described method comprises also that the pressurization dynamics is quantitatively controlled in man-made fracture aperture, the crack when bonding by meticulous quantitative control and accumulates permeability, wherein, keep the bonding agent consumption and when bonding the pressurization dynamics constant, by regulating the proppant particle diameter, can accurately obtain to specify the man-made fracture of physical property.
3. the meticulous control method of monolete percolating medium physical property as claimed in claim 1 is characterized in that, this control method also comprises utilizes natural rock sample system of selection quantitatively to control matrix permeability, matrix porosity; Make seam and two kinds of method combinations of natural rock sample selection by the meticulous bonding way of aforesaid sillar, quantitatively control the conventional permeability in crack, fracture porosity, permeability of fracture matrix system and crack-matrix system degree of porosity.
4. the meticulous control method of monolete percolating medium physical property as claimed in claim 1 is characterized in that the method comprises the following steps:
(1) natural rock sample is selected and the sillar preparation: select the natural rock sample of required physical property to be processed into and make the required sillar of seam;
(2) Chosen Point glue position: determine that rectangle sillar burnishing surface geometric center is a glue position;
(3) make the 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 the sillar burnishing surface, the circular hole center of circle of thin plate and some glue geometry of position center are coincide; Determine the particle diameter of proppant according to required man-made fracture aperture, 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 presses close to the crack interface, to embody the supporting role of proppant mutually; Make pull and push dynamometer keep predetermined pressure, until bonding agent solidifies the man-made fracture setting.
5. the meticulous control method of monolete percolating medium physical property as claimed in claim 4 is characterized in that, in the described step (three), is to choose thickness B to make a sealing rubber die greater than the hard sheet of proppant particle diameter; Circle hole radius r on the described hard sheet determines according to a colloid accumulated amount m:
6. the meticulous control method of monolete percolating medium physical property as claimed in claim 4, it is characterized in that, described proppant is the circular glass microballon, the glass microballoon particle diameter equals described man-made fracture aperture, in the described step (four), be the circular glass microballon of placing the corresponding particle diameter of one deck in circular hole, described glass microballoon plays the effect of supporting crack.
7. the meticulous control method of monolete percolating medium physical property as claimed in claim 4 is characterized in that, in the described step (five), is so that the bonding agent end face in the described circular hole is equal with the end face of circular thin plate when adding cementing agent.
8. the meticulous control method of monolete percolating medium physical property as claimed in claim 4, it is characterized in that, in the described step (six), to adopt high accuracy pull and push dynamometer applied thrust directly over glue point, thereby make the crack interface mutually press close to embody the glass microballoon supporting role, use bonding pressure 180-220N in this process.
9. the meticulous control method of monolete percolating medium physical property as claimed in claim 1 is characterized in that the method comprises the following steps:
(1) selects natural rock sample and preparation sillar
Investigate the physical property of various natural rock samples, select the natural rock sample of required physical property to be processed into and make the required sillar of seam, require interface smooth;
(2) Chosen Point glue position
Determine that rectangle sillar burnishing surface geometric center is a some glue position, so that the man-made fracture of pressurizeing when bonding is stable, fracture aperture is consistent everywhere on the fracture surface;
(3) make the some sealing rubber die
Choose the hard sheet that thickness is B, and thickness B is greater than the proppant particle diameter; Behind the specified point colloid accumulated amount m, at hard sheet making radius be
Circular hole, be a sealing rubber die with the hard sheet of circular hole, utilize this sealing rubber die to realize the meticulous control of some glue amount;
(4) the meticulous control mode of fracture aperture
Hard sheet is pressed close to the sillar burnishing surface, the thin plate circular hole center of circle and some glue geometry of position center are coincide; In determined man-made fracture aperture, place the circular glass microballon of the corresponding particle diameter of one deck as the particle diameter value of the glass microballoon of proppant in circular hole, glass microballoon plays the effect of supporting crack;
(5) bonding agent is inserted
Behind the placing glass microballon, in circular hole, add required bonding agent, and guarantee that the bonding agent end face is equal with circular thin plate end face in the circular hole;
(6) the meticulous control of bonding pressure
Use control accuracy to be the high accuracy pull and push dynamometer of 0.01N, applied thrust directly over glue point is pressed close to the crack interface mutually; The adjusting pole gear is accurately controlled thrust, uses bonding pressure 200.00N; Make the high accuracy pull and push dynamometer keep predetermined pressure, until bonding agent solidifies the man-made fracture setting.
10. the meticulous control method of monolete percolating medium physical property as claimed in claim 9 is characterized in that, in the described step (five), is to select 302 modified acrylic ester adhesion agents.
11. the meticulous control method of monolete percolating medium physical property as claimed in claim 1 is characterized in that, the method also comprises to be verified prepared monolete percolating medium.
12. the meticulous control method of monolete percolating medium physical property as claimed in claim 11 is characterized in that described checking comprises the experimental verification to this percolating medium physical property, it is that experiment value and the theoretical value of will accumulate permeability in the crack compare.
13. the meticulous control method of monolete percolating medium physical property as claimed in claim 11 is characterized in that, described checking comprises repeatable checking.
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| CN106285662A (en) * | 2016-08-30 | 2017-01-04 | 中国石油大学(北京) | Fractured reservoir physical model splits storage than quantitative control methodin and device |
| CN106837315A (en) * | 2015-12-03 | 2017-06-13 | 中国石油化工股份有限公司 | Fractured carbonate rock matrix and crack coupling characterizing method |
| CN108729914A (en) * | 2018-07-06 | 2018-11-02 | 中国石油大学(北京) | The long monitoring system and method for rock core seam |
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| CN103375165B (en) | 2016-02-10 |
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