CN102564900A - Simulation test method for seepage process of polymer solution at different positions of stratum - Google Patents
Simulation test method for seepage process of polymer solution at different positions of stratum Download PDFInfo
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- CN102564900A CN102564900A CN2012100146324A CN201210014632A CN102564900A CN 102564900 A CN102564900 A CN 102564900A CN 2012100146324 A CN2012100146324 A CN 2012100146324A CN 201210014632 A CN201210014632 A CN 201210014632A CN 102564900 A CN102564900 A CN 102564900A
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Abstract
The invention relates to a simulation test method for a seepage process of a polymer solution at different positions of a stratum. The method comprises the following steps of: preparing a sand filling tube model which accords with oil reservoir reality according to an oil reservoir mineral compositions, testing a porosity and a permeability parameter of a sand filling tube, and strictly simulating an oil reservoir corresponding parameter; selecting an injection flow value of a polymer system according to a researched stratum position; then performing a closed cyclic experimental test for simulating the original pressure and the temperature condition of the stratum, and simulating the seepage process of the polymer solution in the stratum; and closing, isolating oxygen, fetching a sample, testing the rheology of the sample, and comparing to calculate the change rule of the rheology. According to the simulation test method, the seepage process of the polymer system at different positions in the stratum can be reflected really; and a test and evaluation method is supplied to research on the rheology of the polymer solution during seepage at different positions and different seepage distances in the stratum.
Description
One, technical field:
What the present invention relates to is the indoor test and the evaluation method of polymer solution rheological Changing Pattern in oil reservoir in the tertiary oil recovery process, be specifically related to be polymer solution on the stratum diverse location place flow event analog detection method.
Two, background technology:
The polymer solution technology of reservoir sweep is the present both at home and abroad method of ripe raising recovery ratio in the oilfield exploitation; But the rheological at polymer solution seepage flow to diverse location place in the stratum changes research goes back the neither one effective method, and the credibility that causes the polymkeric substance development effectiveness is estimated lacks strong foundation.The rheological characteristics of polymer solution in porous medium is the key areas in the polymer rheology; It is related to the physical process that polymer solution flows and taken place in porous medium; The analysis of exact science is carried out in the research work in this field to polymer flooding; To engineering design, and process optimization etc. has urgent Practical significance.Do not see delivering of domestic and international pertinent literature always; The blank of the research content becomes the technical bottleneck that restriction rheological property of polymer solution rule in stratum filtration changes research; Further limited in the oil-field development polymeric system is gone resultful evaluation, the method for therefore setting up simulating polymer solution seepage flow rheological variation research to the diverse location place in the stratum is significant.
Three, summary of the invention:
The purpose of this invention is to provide polymer solution on the stratum diverse location place flow event analog detection method, it is used for solving present oilfield development process and lacks the indoor test of polymkeric substance flow event rheological Changing Pattern in oil reservoir and the problem of evaluation.
The technical solution adopted for the present invention to solve the technical problems is: this polymer solution is diverse location place flow event analog detection method on the stratum; At first meet the actual fill out sand tube model of oil reservoir according to oil reservoir mineral composition preparation; Two kinds of fill out sand tube size design: Φ 25.4 * 400mm or Φ 60 * 200mm; Back-up sand casing pack mineral composition is identical with simulated formation; Make in the actual seepage flow in lab simulation and stratum mineral pair polymer solution performance impact identical, test fill out sand tube factor of porosity and Permeability Parameters are in strict conformity with the corresponding parameter of simulating oil deposit; Injection flow according to the position of stratum selective polymerization objects system of studying; Carry out the sealing and circulating experiment test of simulated formation virgin pressure, temperature conditions then, simulating polymer solution is flow event in the stratum, puts into the experimental simulation environment to the fill out sand tube model for preparing; Connect enclosed oxygen isolation circulation injected system, connect injected system and extraction device, start injected system; Open tensimeter; Open the high temperature constant temperature control box, simulation stratum condition is provided with injection parameter; Through the circulate seepage flow experiment of enclosed oxygen isolation circulation injected system, the flow event of simulating polymer solution in the stratum; Enclosed oxygen isolation accesses sample, specimen rheological, contrast calculated flow sex change Changing Pattern.
Preparation meets the method for the actual fill out sand tube model of oil reservoir in the such scheme:
(1) chooses according to the experimental simulation task of explanation and prepare metal pattern; As test the seepage flow distance and can choose Φ 25.4 * 400mm model with the rheological property of polymer solution variation relation, like the modeling effort percolation flow velocity rheological property of polymer solution Changing Pattern is then chosen Φ 60 * 200mm metal pattern;
(2) natural core of the stratum of simulation being obtained is analyzed, and obtains formation pore structural parameters and mineral composition ratio;
(3) choose mineral rock ground mass material according to experimental simulation stratum mineral composition ratio; Carrying out the particle diameter ratio according to size distribution then selects; Evenly mix filling mineral according to mineral composition and particle diameter ratio, can add the bonding mineral of suitable amount of adhesive like bonding mineral such as no clays;
(4) to model filling mineral intermixture, base area layer original pressure environment is confirmed compaction pressure, uses electronic compacting machine spreads compaction model;
(5) thermostatic curing 48 hours under the reservoir temperature condition;
(6) under the reservoir temperature condition, survey the model permeability and confirm whether model has similar permeability character with simulated formation through gas; Survey the model permeability through saturated stratum simulation salt solution and water, confirm the similarity of model once more with the simulation stratum.
Simulating polymer solution flow event in the stratum in the such scheme:
(1) in indoor enclosed oxygen isolation circulation injected system,, realizes the similarity of experimental situation with the simulation oil reservoir through system pressure and temperature control;
(2) open injected system,, carry out the seepage simulation circulation, confirm cycle index according to the simulated formation distance according to calculated flow rate injection of polymer solution;
(3) preserve filling nitrogen in the container through plunger type, realize the isolation of polymer solution with oxygen to the extraction device; Realize the enclosed oxygen isolation of injected system through the strict airtight connection of whole enclosed oxygen isolation circulation injected system, avoid the solution ingress of air, realize the sealing and circulating process of the test;
(4) preserve the container oxygen barrier in the outlet of enclosed oxygen isolation circulation injected system through plunger type and preserve the outlet sample;
(5) in test macro, measure rheological property of polymer solution fast, study its rheological Changing Pattern;
(6) calculate the corresponding shear rate of different percolation flow velocities through formula
, through of the influence of the different seepage flow distances of indoor rheological test result comparative analysis to rheological property of polymer solution.
Enclosed oxygen isolation circulation injected system comprises plunger type intermediate receptacle, intermediate receptacle, fill out sand tube model, four-way valve, tensimeter, pump in the such scheme, constitutes the polymkeric substance infusion circuit by the injection line, the second plunger type intermediate receptacle that inject between the first plunger type intermediate receptacle, the first plunger type intermediate receptacle and first intermediate receptacle between line, fill out sand tube model, second intermediate receptacle, second intermediate receptacle and the second plunger type intermediate receptacle; Constitute polymer produced loop by the extraction line between extraction line, fill out sand tube model, second intermediate receptacle, second intermediate receptacle and the first plunger type intermediate receptacle, the first plunger type intermediate receptacle between the second plunger type intermediate receptacle, the second plunger type intermediate receptacle and first intermediate receptacle; Pump is connected with the lower chamber and the second plunger type intermediate receptacle lower chamber of the first plunger type intermediate receptacle respectively through first four-way valve; A tensimeter respectively is installed before and after the fill out sand tube model.
The first plunger type intermediate receptacle in the such scheme and the second plunger type intermediate receptacle equal and opposite in direction; First intermediate receptacle and the second intermediate receptacle equal and opposite in direction.
The top of the first plunger type intermediate receptacle is equipped with second four-way valve in the such scheme; The first intermediate receptacle bottom is equipped with the 3rd four-way valve; The top of second intermediate receptacle is installed the bottom of the 4th four-way valve, second intermediate receptacle the 5th four-way valve is installed; The top of the second plunger type intermediate receptacle is equipped with the 6th four-way valve; The lower chamber of the lower chamber of the first plunger type intermediate receptacle and the second plunger type intermediate receptacle is respectively installed a bleed valve, and the bottom of second intermediate receptacle also is equipped with bleed valve.
Beneficial effect:
Polymer solution provided by the invention rheological in the flow event under stratum diverse location place and the different seepage flow distance conditions changes research method; Principle is reliable; Fill out sand tube modelling and proving installation are simple in structure, can reflect more truly that polymeric acceptor ties up to the flow event of stratum diverse location, and the test of reduction subsurface pressure condition and temperature conditions its lead the variation of polymeric system rheological; Analogy method is practical, and test findings adaptability is good.The present invention provides test and evaluation method for polymer solution rheological in stratum diverse location place and different seepage flow distance flow event down changes to study.
2, the present invention has simulated the sealing and circulating injected system of polymer solution seepage flow in the stratum.
3, the present invention has set up the mineral composition of preparation simulated formation and the method for pore structure characteristic.
Four, description of drawings:
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is that the polymer solution seepage simulation circulation system is arranged block diagram among the present invention;
Fig. 3 is the structural representation of enclosed oxygen isolation circulation injected system among the present invention;
Fig. 4 is the structural representation of extraction device among the present invention;
Fig. 5 be fluid at the diverse location place percolation flow velocity Discrepancy Description synoptic diagram;
Fig. 6-Fig. 8 is a back-up sand way of contact difference synoptic diagram in the fill out sand tube model;
Fig. 9 is that rheological changes research method middle distance simulation key diagram in the polymer solution flow event.
1 pump, 2 first plunger type intermediate receptacles, 2 ' the second plunger type intermediate receptacles, 3 first intermediate receptacles, 3 ' the second intermediate receptacles, 4 fill out sand tube models 5 inject line 6 extraction lines 7 first cross valves 8 second cross valves 9 the 3rd cross valve 10 the 4th cross valve 11 the 5th cross valve 12 drain valves 13 Pressure gauges 14 the 6th cross valve 15 plunger types and preserve container entrance 16 distilled water outlets 17 high temperature constant temperature control cabinets 18 blower fans 19 injected systems 20 enclosed oxygen isolation circulation injected systems 21 extraction devices 22 testing arrangements.
Five, embodiment:
Below in conjunction with accompanying drawing the present invention is done further explanation:
The technical matters that the present invention will solve is mainly concentrated two aspects:
(1) initial condition of the Different Strata of preparation simulating polymer seepage flow, the pressure environment of depositing in underground tax
And temperature environment, the test polymer rheology of solution changes.
The stratum initial condition of simulating polymer seepage flow: 1. be that the filling mineral composition is identical with simulated formation, make in the actual seepage flow in lab simulation and stratum mineral pair polymer solution performance impact identical; 2. stratum size distribution and contact cement mode are studied in the model filling; Test model factor of porosity, pore texture and seepage flow rate parameter are close with the research stratum; But the shearing stress that receives in the assurance polymkeric substance flow event has the comparative with actual formation, like Fig. 6, Fig. 7, shown in Figure 8.
(2) simulating polymer solution in the stratum different seepage flow position with simulating polymer solution flow event under the different seepage flow distance in the stratum.
In conjunction with Fig. 1, Fig. 2, shown in Figure 5, in order to solve above-mentioned two problems, the technical scheme that the present invention adopts is specially:
At first confirm that according to study a question needs and stratum physical condition fill out sand tube prepares scheme; Select quartz sand particle size distribution and ratio, mineral to form and the filling mode; The preparation fill out sand tube, test fill out sand tube factor of porosity and Permeability Parameters are in strict conformity with the corresponding parameter of simulating oil deposit;
(comprising: low speed vadose region at the bottom of the injection-production well, between well pattern main stream line middle part and well) the injection flow of selective polymerization objects system according to the position of stratum of research;
Carry out the sealing and circulating experiment test of conditions such as simulated formation virgin pressure, temperature then, put into the experimental simulation environment to the fill out sand tube model 4 for preparing, connect enclosed oxygen isolation circulation injected system 20, connect injected system 19 and extraction device; Start injected system 19, open tensimeter, open the temperature controller device; Simulation stratum condition is provided with injection parameter, carries out the seepage flow experiment; The outlet enclosed oxygen isolation accesses sample, specimen rheological, contrast calculated flow sex change Changing Pattern.
Be specially:
At first preparation meets the percolation model of simulated formation reservoir rocks pore texture and mineral composition, and its method for making is following:
If only study shear stress, only need to confirm that quartz sand particle size distributes in the fill out sand tube to the influence of rheological property of polymer solution in seepage flow; If research absorption then need be loaded normal 2 meters fill out sand tube to the rheological property of polymer solution influence.
(1) chooses according to the experimental simulation task of explanation and prepare metal pattern; As test the seepage flow distance and can choose Φ 25.4 * 400mm model with the rheological property of polymer solution variation relation, like the modeling effort percolation flow velocity rheological property of polymer solution Changing Pattern is then chosen Φ 60 * 200mm metal pattern.
(2) natural core of the stratum of simulation being obtained is analyzed, and obtains formation pore structural parameters and mineral composition ratio.
(3) choose mineral rock ground mass material according to experimental simulation stratum mineral composition ratio; Carrying out the particle diameter ratio according to size distribution then selects; Evenly mix filling mineral according to mineral composition and particle diameter ratio, can add the bonding mineral of suitable amount of adhesive like bonding mineral such as no clays.
(4) to model filling mineral intermixture, base area layer original pressure environment is confirmed compaction pressure, uses electronic compacting machine spreads compaction model.
(5) thermostatic curing 48 hours under the reservoir temperature condition.
(6) under the reservoir temperature condition, survey the model permeability and confirm whether model has similar permeability character with simulated formation through gas; Survey the model permeability through saturated stratum simulation salt solution and water, confirm the similarity of model once more with the simulation stratum.
Calculate definite simulating lab test injection flow and pressure limit according to the actual injection of oil reservoir polymer solution speed and upper pressure limit system then:
(2) confirm the upper pressure limit of injection of polymer solution according to actual formation overburden pressure and stratum virgin pressure.
Begin lab simulation polymer solution seepage flow experiment at last, the research polymer solution with seepage flow apart from the Changing Pattern that increases the system rheological:
(1) in indoor simulated system,, realizes the similarity of experimental situation with the simulation oil reservoir through system pressure and temperature control.
(2) open injected system,, carry out the seepage simulation circulation according to calculated flow rate injection of polymer solution; As shown in Figure 9; Confirm cycle index according to the simulated formation distance, for example: simulating polymer solution seepage flow is to changing apart from 100 meters, shaft bottom rheological, like long 2 meters of analogy model; Then cycle index is 50 times, then 50 * 2 meters=100 meters.
(3) preserve filling nitrogen in the container through plunger type to the extraction device,, realize the isolation of polymer solution with oxygen; Realize the enclosed oxygen isolation of injected system through the strict airtight connection of whole injected system, avoid the solution ingress of air, realize the sealing and circulating process of the test.
(4) preserve the container oxygen barrier in the outlet of enclosed oxygen isolation circulation injected system through plunger type and preserve the outlet sample.
(5) in test macro 22, measure rheological property of polymer solution fast, study its rheological Changing Pattern.
(6) calculate the corresponding shear rate of different percolation flow velocities through formula
, through of the influence of the different seepage flow distances of indoor rheological test result comparative analysis to rheological property of polymer solution.
As shown in Figure 2; The polymer solution seepage simulation circulation system among the present invention mainly is made up of: temperature control system, pressure detecting system, enclosed oxygen isolation circulation injected system 20, extraction device 21, injected system 19, polymer solution preparation and rheological test macro.
Fill out sand tube model 4, enclosed oxygen isolation circulation injected system 20, pressure detecting system, sampling system critical piece are heat resisting and pressure resisting corrosion-resistant stainless steel rigid body, and be easy to loading and unloading, and enclosed oxygen isolation circulation injected system opening and closing flow process is simple.
Enclosed oxygen isolation circulation injected system mainly comprises: import ISCO high precision micro pump, this pump can be realized double plunger circulation injection continuously, inject precision and can reach 0.01ml/min; Set the injection flow according to design discharge; Through compressor 4 atmospheric air pressure are provided, open the pneumatic valve switch in real time, inject continuously; This pump carries high-precision pressure monitoring device, and can monitor the injection pressure and the injection rate IR of pump in real time.
The temperature control system main device is a high temperature constant temperature control box 17, the controllable temperature scope: the 0-250 degree, carry two-way blower fan 18 in the case, and guarantee that the temperature inside the box evenly distributes.
Pressure monitor system comprises the injection pump pressure monitoring, injection side, production end and the precision pressure gauge that is uniformly distributed with different ranges by length,
The rheological test macro comprises: electronic balance, import flow graph, digital control stirrer, water bath with thermostatic control, robot calculator, air compressor etc.
Through above-mentioned each system coordination work, can simulate and compose axle pressure, confined pressure and the temperature environment of depositing, test its flow conductivity.
As shown in Figure 4, the extraction device mainly is that plunger type is preserved container among the present invention, and plunger type is preserved container entrance 15 in the upper end, and distilled water outlet 16 is in the lower end.
As shown in Figure 3; The enclosed oxygen isolation circulation injected system that the seepage flow that circulates among the present invention experiment is used comprises plunger type intermediate receptacle, intermediate receptacle, fill out sand tube model 4, four-way valve, tensimeter, an ISOC pump 1, by injection line 5 between the first plunger type intermediate receptacle 2, the first plunger type intermediate receptacle 2 and first intermediate receptacle 3, fill out sand tube model 4, second intermediate receptacle 3 ', second intermediate receptacle 3 ' and the second plunger type intermediate receptacle 2 ' between injection line 5, the second plunger type intermediate receptacle 2 ' constitute polymkeric substance infusion circuit; By the second plunger type intermediate receptacle 2 ', the second plunger type intermediate receptacle 2 ' and first intermediate receptacle 3 between extraction line 6, fill out sand tube model 4, second intermediate receptacle 3 ', second intermediate receptacle 3 ' and the first plunger type intermediate receptacle 2 between extraction line 6, the first plunger type intermediate receptacle 2 constitute polymer produced loop; Pump 1 is connected with the lower chamber and the second plunger type intermediate receptacle, the 2 ' lower chamber of the first plunger type intermediate receptacle 2 respectively through first four-way valve 7; A tensimeter 13 is respectively installed in fill out sand tube model 4 front and back.The first plunger type intermediate receptacle 2 and the second plunger type intermediate receptacle, 2 ' equal and opposite in direction; First intermediate receptacle 3 and second intermediate receptacle, 3 ' equal and opposite in direction, and both are common intermediate receptacle.
The top of the first plunger type intermediate receptacle 2 of enclosed oxygen isolation circulation injected system is equipped with second four-way valve 8; First intermediate receptacle, 3 bottoms are equipped with the 3rd four-way valve 9; Second intermediate receptacle 3 ' top install the 4th four-way valve 10, second intermediate receptacle 3 ' the bottom the 5th four-way valve 11 is installed; The second plunger type intermediate receptacle 2 ' top the 6th four-way valve 14 is installed; The lower chamber of the first plunger type intermediate receptacle 2 and the second plunger type intermediate receptacle 2 ' lower chamber respectively install a bleed valve 12, the second intermediate receptacles 3 ' the bottom bleed valve also is installed.
It is following that enclosed oxygen isolation circulation injected system is carried out circulation experiment process performing step among the present invention:
Step 1: at first clean and dry each plunger type intermediate receptacle chamber, each intermediate receptacle chamber in the experimentation; Annotate nitrogen and replace the air in above-mentioned each intermediate receptacle, then polymer solution is loaded into first intermediate receptacle, 3 chambers and the first plunger type intermediate receptacle, 2 upper chamber; According to simulated formation position calculation injection rate;
Step 2: open ISCO pump 1, begin experiment; Open first four-way valve 7; Make that distilled water gets into the first plunger type intermediate receptacle, 2 bottom chamber in the ISCO pump 1, under the injection pressure effect in the first plunger type intermediate receptacle 2 plunger from container bottom displacement top polymer solution, the first plunger type intermediate receptacle, 2 bottom drain valve are closed at this moment; Make polymer solution pass through second four-way valve 8 on the first plunger type intermediate receptacle, 2 tops; Between the first plunger type intermediate receptacle and first intermediate receptacle, inject line 5, the 3rd four-way valve 9 through first intermediate receptacle, 3 bottoms gets in first intermediate receptacle 3 again, polymkeric substance infusion circuit operation this moment; Polymer solution injects the fill out sand tube model, and polymer produced loop is closed.
Step 3: behind fill out sand tube model 4 seepage flow, polymer solution through the 5th four-way valve 11 outlets of second intermediate receptacle, 3 ' bottom flow into second intermediate receptacle 3 ' in; This moment, the bleed valve of second intermediate receptacle, 3 ' bottom cut out, (this bleed valve is opened when needing collected specimens to measure); Polymer solution flows out from the 4th four-way valve 10 at second intermediate receptacle, 3 ' top; Through the injection line 5 between second intermediate receptacle 3 and the second plunger type intermediate receptacle; Flow into the second plunger type intermediate receptacle, 2 ' upper chamber through the 6th four-way valve 14; Under the polymer solution effect, distilled water is discharged through bleed valve 12 in the second plunger type intermediate receptacle, 2 ' bottom chamber; And polymer produced loop is still closed.
Step 4: after polymkeric substance injects end in the injection side first plunger type intermediate receptacle 2 top chamber that ISCO pump 1 connects; Close first four-way valve, 7 valves on the pipeline between the lower chamber of the pump 1 and the first plunger type intermediate receptacle 2, open first four-way valve, 7 valves on the pipeline between pump 1 and the second plunger type intermediate receptacle, the 2 ' lower chamber simultaneously; ISCO pump 1 injects distilled water and flows into the second plunger type intermediate receptacle, 2 ' bottom chamber; The outlet polymer solution that the second plunger type intermediate receptacle, 2 ' top chamber the is collected injection that begins to circulate; Polymer produced loop operation this moment; The polymkeric substance infusion circuit is closed; Polymer solution extraction line 6 between the second plunger type intermediate receptacle and first intermediate receptacle flows into first intermediate receptacle 3, and then injection fill out sand tube model 4 circulates; Inject fill out sand tube model 4 outlet polymer solutions through the 5th four-way valve 11 outlets of second intermediate receptacle, 3 ' bottom flow into second intermediate receptacle 3 '; The 4th four-way valve 10 from second intermediate receptacle, 3 ' top flows out again; Extraction line 6 between second intermediate receptacle and the first plunger type intermediate receptacle; Flow into the first plunger type intermediate receptacle, 2 top chamber, begin to collect the outlet polymer solution, for circulation next time is prepared.
Step 5: after polymkeric substance injects and finishes in the second plunger type intermediate receptacle, 2 ' top chamber, open the polymkeric substance infusion circuit, close polymer produced loop simultaneously, beginning circulation is once more injected.
Process above-mentioned steps 2,3,4 and 5 has realized the circulation injection of polymer solution, confirms cycle index according to experimental simulation seepage flow distance and fill out sand tube model length.
Claims (6)
- A polymer solution on the stratum diverse location place flow event analog detection method; It is characterized in that: this polymer solution is diverse location place flow event analog detection method on the stratum; At first meet the actual fill out sand tube model (4) of oil reservoir according to oil reservoir mineral composition preparation; Two kinds of fill out sand tube size design: Φ 25.4 * 400mm or Φ 60 * 200mm, back-up sand casing pack mineral composition is identical with simulated formation, makes in the actual seepage flow in lab simulation and stratum mineral pair polymer solution performance impact identical; Test fill out sand tube factor of porosity and Permeability Parameters are in strict conformity with the corresponding parameter of simulating oil deposit; Injection flow according to the position of stratum selective polymerization objects system of studying; Carry out the sealing and circulating experiment test of simulated formation virgin pressure, temperature conditions then, simulating polymer solution is flow event in the stratum, puts into the experimental simulation environment to the fill out sand tube model for preparing; Connect enclosed oxygen isolation circulation injected system, connect injected system (19) and extraction device (21), start injected system (19); Open tensimeter; Open high temperature constant temperature control box (17), simulation stratum condition is provided with injection parameter; Through circulate seepage flow experiment of enclosed oxygen isolation circulation injected system (20), the flow event of simulating polymer solution in the stratum; Enclosed oxygen isolation accesses sample, specimen rheological, contrast calculated flow sex change Changing Pattern.
- 2. polymer solution according to claim 1 is diverse location place flow event analog detection method on the stratum, it is characterized in that: described preparation meets the method for the actual fill out sand tube model of oil reservoir:(1) chooses according to the experimental simulation task of explanation and prepare metal pattern; As test the seepage flow distance and can choose Φ 25.4 * 400mm model with the rheological property of polymer solution variation relation, like the modeling effort percolation flow velocity rheological property of polymer solution Changing Pattern is then chosen Φ 60 * 200mm metal pattern;(2) natural core of the stratum of simulation being obtained is analyzed, and obtains formation pore structural parameters and mineral composition ratio;(3) choose mineral rock ground mass material according to experimental simulation stratum mineral composition ratio; Carrying out the particle diameter ratio according to size distribution then selects; Evenly mix filling mineral according to mineral composition and particle diameter ratio, can add the bonding mineral of suitable amount of adhesive like bonding mineral such as no clays;(4) to model filling mineral intermixture, base area layer original pressure environment is confirmed compaction pressure, uses electronic compacting machine spreads compaction model;(5) thermostatic curing 48 hours under the reservoir temperature condition;(6) under the reservoir temperature condition, survey the model permeability and confirm whether model has similar permeability character with simulated formation through gas; Survey the model permeability through saturated stratum simulation salt solution and water, confirm the similarity of model once more with the simulation stratum.
- 3. polymer solution according to claim 2 is diverse location place flow event analog detection method on the stratum, it is characterized in that: described simulating polymer solution flow event in the stratum:(1) in indoor enclosed oxygen isolation circulation injected system,, realizes the similarity of experimental situation with the simulation oil reservoir through system pressure and temperature control;(2) open injected system,, carry out the seepage simulation circulation, confirm cycle index according to the simulated formation distance according to calculated flow rate injection of polymer solution;(3) preserve filling nitrogen in the container through plunger type, realize the isolation of polymer solution with oxygen to the extraction device; Realize the enclosed oxygen isolation of injected system through the strict airtight connection of whole enclosed oxygen isolation circulation injected system, avoid the solution ingress of air, realize the sealing and circulating process of the test;(4) preserve the container oxygen barrier in the outlet of enclosed oxygen isolation circulation injected system through plunger type and preserve the outlet sample;(5) in test macro, measure rheological property of polymer solution fast, study its rheological Changing Pattern;(6) calculate the corresponding shear rate of different percolation flow velocities through formula, logical
Cross of the influence of the different seepage flow distances of indoor rheological test result comparative analysis to rheological property of polymer solution. - 4. polymer solution according to claim 3 is diverse location place flow event analog detection method on the stratum; It is characterized in that: described enclosed oxygen isolation circulation injected system comprises plunger type intermediate receptacle, intermediate receptacle, fill out sand tube model (4), four-way valve, tensimeter, pump (1), constitutes the polymkeric substance infusion circuit by the injection line (5), the second plunger type intermediate receptacle (2 ') that inject between the first plunger type intermediate receptacle (2), the first plunger type intermediate receptacle and first intermediate receptacle between line (5), fill out sand tube model (4), second intermediate receptacle (3 '), second intermediate receptacle and the second plunger type intermediate receptacle; Constitute polymer produced loop by the extraction line (6) between extraction line (6), fill out sand tube model (4), second intermediate receptacle (3 '), second intermediate receptacle and the first plunger type intermediate receptacle, the first plunger type intermediate receptacle (2) between the second plunger type intermediate receptacle (2 '), the second plunger type intermediate receptacle and first intermediate receptacle; Pump (1) is connected with the lower chamber and second plunger type intermediate receptacle (2 ') lower chamber of the first plunger type intermediate receptacle (2) respectively through first four-way valve (7); A tensimeter (13) respectively is installed before and after the fill out sand tube model (4).
- 5. polymer solution according to claim 4 is diverse location place flow event analog detection method on the stratum, it is characterized in that: the described first plunger type intermediate receptacle (2) and second plunger type intermediate receptacle (2 ') equal and opposite in direction; First intermediate receptacle (3) and second intermediate receptacle (3 ') equal and opposite in direction.
- 6. polymer solution according to claim 5 is diverse location place flow event analog detection method on the stratum, it is characterized in that: the top of the described first plunger type intermediate receptacle (2) is equipped with second four-way valve (8); First intermediate receptacle (3) bottom is equipped with the 3rd four-way valve (9); The top of second intermediate receptacle (3 ') is installed the bottom of the 4th four-way valve (10), second intermediate receptacle (3 ') the 5th four-way valve (11) is installed; The top of the second plunger type intermediate receptacle (2 ') is equipped with the 6th four-way valve (14); The lower chamber of the lower chamber of the first plunger type intermediate receptacle (2) and the second plunger type intermediate receptacle (2 ') is respectively installed a bleed valve (12), and (3 ') bottom of second intermediate receptacle also is equipped with bleed valve.
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| CN108412469A (en) * | 2018-02-14 | 2018-08-17 | 中国石油大学(北京) | A kind of fill out sand tube and preparation method thereof and Reservoir Seepage analogy method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105571988A (en) * | 2015-12-14 | 2016-05-11 | 中国石油天然气股份有限公司 | Polymer thermal stability detecting equipment and detecting method |
| CN108412469A (en) * | 2018-02-14 | 2018-08-17 | 中国石油大学(北京) | A kind of fill out sand tube and preparation method thereof and Reservoir Seepage analogy method |
| CN110361296A (en) * | 2018-04-10 | 2019-10-22 | 中国石油天然气股份有限公司 | A kind of determination device and method of polymer gel system gel-forming property |
| CN113027434A (en) * | 2021-03-25 | 2021-06-25 | 东北石油大学 | Method for determining rheological property parameters of polymer-containing liquid in near wellbore zone of perforation completion |
| CN113027434B (en) * | 2021-03-25 | 2022-07-19 | 东北石油大学 | Method for determining rheological property parameters of polymer-containing liquid in near wellbore zone of perforation completion |
| US20220403613A1 (en) * | 2021-06-16 | 2022-12-22 | Wenzhou University | Experimental setup for measuring the vacuum degree and pore pressure at a point of soil mass in vacuum consolidated state and the test operation method thereof |
| US11549227B1 (en) * | 2021-06-16 | 2023-01-10 | Wenzhou University | Experimental setup for measuring the vacuum degree and pore pressure at a point of soil mass in vacuum consolidated state and the test operation method thereof |
| CN117672048A (en) * | 2024-01-31 | 2024-03-08 | 山东大学 | Nitrogen source analysis virtual simulation experiment system and method based on nitrogen isotope test |
| CN117672048B (en) * | 2024-01-31 | 2024-04-19 | 山东大学 | Nitrogen source analysis virtual simulation experiment system and method based on nitrogen isotope test |
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| CN102564900B (en) | 2013-11-20 |
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