CN105067408A - Core physical model production method capable of achieving variable-viscosity injection - Google Patents
Core physical model production method capable of achieving variable-viscosity injection Download PDFInfo
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- CN105067408A CN105067408A CN201510505881.7A CN201510505881A CN105067408A CN 105067408 A CN105067408 A CN 105067408A CN 201510505881 A CN201510505881 A CN 201510505881A CN 105067408 A CN105067408 A CN 105067408A
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Abstract
The invention relates to a core physical model production method capable of achieving variable-viscosity injection, and solves the problems that the operation procedures are complex due to the fact that in the traditional indoor test, intermediate containers filled with polymers with different viscosity need continuous conversion. The production method comprises the following specific steps: firstly, producing a simulated clipper, wherein two mutually fitting panels with the same through holes uniformly distributed are arranged inside the clipper, and when the two panels are stagger, the open area of a polymer solution is changed, so that the shearing degree for the polymer solution is different, and the viscosity of the polymer solution is changed; drawing a shear viscosity drawing plate according to the viscosity change of polymers of various tap positions; finally, arranging the simulated clipper in a core physical model, so as to achieve the purpose that the solution viscosity is changed at any time during the test process. According to the production method, intermediate container conversion is not needed during the test process, so that the error caused by intermediate container conversion is decreased, and the accuracy rate of the test result is improved.
Description
Technical field
The present invention relates to a kind of preparation method of rock core physical model.
Background technology
In tertiary oil production in oil field method, the polymer flooding in chemical flooding is a class very effective raising recovery ratio method.Polymer flooding is the tertiary oil recovery technology grown up mid-term in last century, due to the method possess skills simply, the feature such as cost is lower, be relatively applicable to the actual conditions in the most of oil field of China, be widely used gradually.The Main Function mechanism of polymkeric substance reduces mobility ratio by viscosity B coefficent exactly, the viscosity of polymer solution is the important indicator affecting polymer flooding effect, in fact polymer solution viscosity and polymer molecular weight, concentration, shear resistant all has direct relation, comparatively macropore can be first entered when noting poly-after polymer solution for the actual heterogeneous reservoir in scene, next enters less pore throat, when polymer coils size is greater than rock core throat diameter, under normal injection pressure, polymer molecule can not enter rock core duct, this will cause polymer solution to inject difficulty, block.In chemical agent injection process, when rock core pore throat size and polymer coils size compatibility better time, with injected slurry volume increase, injection pressure raise after there will be horizontal segment.Otherwise injection pressure and injected slurry volume relation curve will continue to raise.Exceed storage parting pressure even gradually, the often genetic profile reversion of the poly-mode of single concentration note, and there will be the situation injecting difficulty in the later stage.Also macropore may be there is in actual reservoir, there will be displacing fluid in note collecting process to advance by leaps and bounds formation inefficient cycle at most permeable zone, now need to become sticky injection to play regulating action, injecting so become sticky is the on-the-spot conventional effective injection mode of one, there is gradient viscosity reduction, gradient thickening at present, become sticky and inject several mode, effect is all better than single concentration and injects.
At present by using conventional artificial's core model when carrying out becoming sticky the displacement test injected, the analog form of laboratory experiment employing is that the mode of the piston container by converting splendid attire variable concentrations and viscosity in displacement process realizes, disposable viscosity limited amount, experiment container occupation of land spatial dimension is large, device connection line is loaded down with trivial details, experimental arrangement is complicated, termination of pumping conversion container causes pressure drop, when connecting new container, pipeline needs again emptying, the regular hour is caused to waste, produce a large amount of systematic error, experimental result accuracy declines to a great extent.
Summary of the invention
The object of this invention is to provide a kind of method for making of the rock core physical model injected that can realize becoming sticky, the rock core physical model made by the inventive method, solving traditional laboratory experiment needs constantly conversion that the intermediate receptacle of different viscosity polymkeric substance is housed, the problem of running program complexity, this rock core physical model is adopted to carry out poly-driving experiment, not only can reduce the workload of laboratory experiment, reduction means volume, the simulation degree to field experiment can also be improved, according to the evaluation to experimental program effect, strong experiment can be provided to ensure for field test.
For achieving the above object, the technical solution used in the present invention is: a kind of method for making of the rock core physical model injected that can realize becoming sticky, specifically comprises the steps:
1, the making of clipper is simulated:
The arranged on left and right sides wall of a cuboid container arranges inlet opening and fluid hole respectively, and in cuboid container, a square container is set according to its left side wall and base plate, the height of this square container is less than the height of cuboid container, the right openings of square container is welded and fixed adjustment sheet, uniform some rectangles, square or manhole on this secured adjusted sheet; On-fixed adjustment sheet is fitted with the right flank of secured adjusted sheet, the height of on-fixed adjustment sheet is less than the height of cuboid container, is greater than the height of square container, its width is equal with the width of cuboid container inner chamber, on-fixed adjustment sheet both sides arrange the longitudinal through hole along its body respectively, cuboid container internal fixtion two longitudinal rails, two guide rails are each passed through two through holes; In the middle of the upper surface of on-fixed adjustment sheet, fixed slot is set, in the measuring staff front end of differential head, locking-type plug is set, differential head measuring staff is inserted in slot through its front end plug after cuboid container, and rotate microdrum or the fine setting button of differential head, on-fixed adjustment sheet moves up and down along guide rail; Uniform dry adjustment through hole in the part fitted with secured adjusted sheet of on-fixed adjustment sheet, these regulate the shape of through holes and through hole on secured adjusted sheet and size identical, when on-fixed adjustment sheet is in the lowermost end of cuboid container, adjustment through hole on on-fixed adjustment sheet and the through hole left and right on secured adjusted sheet superimposed, along with on-fixed adjustment sheet progressively on move, through hole and on-fixed adjustment sheet regulate through hole mutual dislocation to secured adjusted sheet, until through hole is closed on secured adjusted sheet;
The shear viscosity chart board of 2, simulating clipper makes:
The polymer mother liquor of preparation different molecular weight, by the polymer mother liquor device of different molecular weight in different piston containers, by constant-flux pump for piston container provides liquid seepage power, by pipeline, piston container is connected and polymer solution is flowed into simulate in clipper with simulation clipper, manual adjustments differential head drives on-fixed adjustment sheet to move, eyelet between secured adjusted sheet and on-fixed adjustment sheet is misplaced, by regulating different gears, collect the polymer solution sample sheared by different eyelet, measure its viscosity, formulate the solution viscosity chart board that the corresponding different gear of often kind of mother liquor is sheared,
3, the rock core physical model laying simulation clipper makes:
First according to the naked rock core of actual oilfield reservoir situation compacting cutting, by bonding for naked core entry end simulation clipper, then bakelite plate is pasted at the opposite side of simulation clipper, finally by naked core surface frictioning, rock core cast molding.
Beneficial effect: the method obtains rock core physical model by the mode arranging simulation clipper at core entry end on the routine casting rock core basis of preparing, when carrying out the experiment of conventional chambers physical simulation polymer flooding, the manual size changing perforation size inside simulation clipper just can be sheared polymer solution viscosity, realization becomes sticky injection, intermediate receptacle need not be changed in experimentation, decrease the workload of experimenter, simplify running program, reduce the error brought because of transformation intermediate receptacle, improve the accuracy rate of experimental result.
Accompanying drawing explanation
Fig. 1 is the structural representation of simulation clipper.
Fig. 2 is the structural representation of secured adjusted sheet.
Fig. 3 is the structural representation of non-secured adjusted sheet.
Fig. 4 is the structural representation of differential head.
Fig. 5 is the shear viscosity chart board Making programme figure of simulation clipper.
Fig. 6 is that rock core physical model prepared by the present invention carries out the poly-process flow diagram driving experiment.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further:
Can be realized becoming sticky the method for making of the rock core physical model injected, specifically comprises the steps:
1, the making of clipper is simulated:
As shown in Figure 1: inlet opening 2 and fluid hole 8 are set respectively on the arranged on left and right sides wall of a cuboid container 1, and in cuboid container 1, a square container 3 is set according to its left side wall and base plate, the height of this square container 3 is less than the height of cuboid container 1, the right openings of square container 3 is welded and fixed adjustment sheet 4, shown in composition graphs 2: uniform some rectangles, square or manhole 41 on this secured adjusted sheet 4; On-fixed adjustment sheet 5 is fitted with the right flank of secured adjusted sheet 4, shown in composition graphs 3: the height of on-fixed adjustment sheet 5 is less than the height of cuboid container 1, is greater than the height of square container 3, its width is equal with the width of cuboid container inner chamber, on-fixed adjustment sheet 5 both sides arrange the longitudinal through hole 52 along its body respectively, cuboid container 1 internal fixtion two longitudinal rails 6, two guide rail 6 is each passed through two through holes 52; In the middle of the upper surface of on-fixed adjustment sheet 5, fixed slot 51 is set, shown in composition graphs 4: in the measuring staff front end of differential head 7, locking-type plug 71 is set, differential head measuring staff is inserted in slot 51 through its front end plug 71 after cuboid container, rotate microdrum or the fine setting button of differential head, on-fixed adjustment sheet 5 moves up and down along guide rail 6; Uniform dry adjustment through hole 53 in the part fitted with secured adjusted sheet of on-fixed adjustment sheet, these regulate the shape of through holes 53 and through hole 41 on secured adjusted sheet and size identical, when on-fixed adjustment sheet 5 is in the lowermost end of cuboid container 1, adjustment through hole 53 on on-fixed adjustment sheet is superimposed with the through hole about 41 on secured adjusted sheet, along with on-fixed adjustment sheet 5 progressively on move, through hole 41 and on-fixed adjustment sheet regulate through hole 53 mutual dislocation, until through hole 41 is covered reality by on-fixed adjustment sheet 5 to secured adjusted sheet;
The shear viscosity chart board of 2, simulating clipper makes:
The polymer mother liquor of preparation different molecular weight, as shown in Figure 5: by the polymer mother liquor device of different molecular weight in different piston containers 20, by constant-flux pump 10 for piston container 20 provides liquid seepage power, by pipeline, piston container 20 is connected and polymer solution is flowed into simulate in clipper 30 with simulation clipper 30, manual adjustments differential head drives on-fixed adjustment sheet to move, eyelet between secured adjusted sheet and on-fixed adjustment sheet is misplaced, by regulating different gears, collect the polymer solution sample sheared by different eyelet, measure its viscosity, formulate the solution viscosity chart board that the corresponding different gear of often kind of mother liquor is sheared,
3, the rock core physical model laying simulation clipper makes:
Shown in composition graphs 6: first according to the naked rock core 40 of actual oilfield reservoir situation compacting cutting, by the bonding simulation clipper 30 of naked rock core 40 inlet end, then bakelite plate 15 is pasted at the opposite side of simulation clipper 30, bakelite plate 15 is arranged the through hole be communicated with simulation clipper inlet opening, finally by naked core surface frictioning, rock core cast molding.
Carry out poly-when driving experiment, the connected mode of whole experimental provision is as shown in Figure 6: get out rock core physical model and polymer solution, polymer solution is poured in piston container 20, then by pipeline, constant-flux pump 10 is connected with piston container 20, liquid makes polymer solution flow in square container by pipeline and liquid flowing valve by constant-flux pump 10 by the liquid in piston container 20, experimentally the size that on two adjustment sheets, eyelet staggers is regulated to the specific requirement of solution viscosity, the polymer solution sheared is flow in rock core by liquid outlet and carries out displacement test.
Claims (1)
1. can realize becoming sticky the method for making of the rock core physical model injected, specifically comprises the steps:
(1) making of clipper, is simulated:
The arranged on left and right sides wall of a cuboid container arranges inlet opening and fluid hole respectively, and in cuboid container, a square container is set according to its left side wall and base plate, the height of this square container is less than the height of cuboid container, the right openings of square container is welded and fixed adjustment sheet, uniform some rectangles, square or manhole on this secured adjusted sheet; On-fixed adjustment sheet is fitted with the right flank of secured adjusted sheet, the height of on-fixed adjustment sheet is less than the height of cuboid container, is greater than the height of square container, its width is equal with the width of cuboid container inner chamber, on-fixed adjustment sheet both sides arrange the longitudinal through hole along its body respectively, cuboid container internal fixtion two longitudinal rails, two guide rails are each passed through two through holes; In the middle of the upper surface of on-fixed adjustment sheet, fixed slot is set, in the measuring staff front end of differential head, locking-type plug is set, differential head measuring staff is inserted in slot through its front end plug after cuboid container, and rotate microdrum or the fine setting button of differential head, on-fixed adjustment sheet moves up and down along guide rail; Uniform dry adjustment through hole in the part fitted with secured adjusted sheet of on-fixed adjustment sheet, these regulate the shape of through holes and through hole on secured adjusted sheet and size identical, when on-fixed adjustment sheet is in the lowermost end of cuboid container, adjustment through hole on on-fixed adjustment sheet and the through hole left and right on secured adjusted sheet superimposed, along with on-fixed adjustment sheet progressively on move, through hole and on-fixed adjustment sheet regulate through hole mutual dislocation to secured adjusted sheet, until the through hole on secured adjusted sheet is closed;
(2) the shear viscosity chart board of, simulating clipper makes:
The polymer mother liquor of preparation different molecular weight, by the polymer mother liquor device of different molecular weight in different piston containers, by constant-flux pump for piston container provides liquid seepage power, by pipeline, piston container is connected and polymer solution is flowed into simulate in clipper with simulation clipper, manual adjustments differential head drives on-fixed adjustment sheet to move, eyelet between secured adjusted sheet and on-fixed adjustment sheet is misplaced, by regulating different gears, collect the polymer solution sample sheared by different eyelet, measure its viscosity, formulate the solution viscosity chart board that the corresponding different gear of often kind of mother liquor is sheared,
(3) the rock core physical model, laying simulation clipper makes:
First according to the naked rock core of actual oilfield reservoir situation compacting cutting, by bonding for naked core entry end simulation clipper, then bakelite plate is pasted at the opposite side of simulation clipper, finally by naked core surface frictioning, rock core cast molding.
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| CN201510505881.7A CN105067408B (en) | 2015-08-18 | 2015-08-18 | Core physical model production method capable of achieving variable-viscosity injection |
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| CN201510505881.7A CN105067408B (en) | 2015-08-18 | 2015-08-18 | Core physical model production method capable of achieving variable-viscosity injection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332679A (en) * | 2015-11-26 | 2016-02-17 | 东北石油大学 | Physical simulation method for achieving thermal recovery process of indoor core |
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| US3977469A (en) * | 1975-02-03 | 1976-08-31 | Shell Oil Company | Conservation of water for core flow |
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2015
- 2015-08-18 CN CN201510505881.7A patent/CN105067408B/en not_active Expired - Fee Related
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| US4580627A (en) * | 1981-06-19 | 1986-04-08 | Marathon Oil Company | Oil recovery process and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105332679A (en) * | 2015-11-26 | 2016-02-17 | 东北石油大学 | Physical simulation method for achieving thermal recovery process of indoor core |
| CN105332679B (en) * | 2015-11-26 | 2018-02-02 | 东北石油大学 | A kind of laboratory core realizes the physical simulating method of thermal process |
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| CN105067408B (en) | 2017-04-12 |
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Granted publication date: 20170412 Termination date: 20200818 |