CN102042013B - Near wellbore area cutting simulation device for combined cylinder body with three layers of compacted sand bodies - Google Patents
Near wellbore area cutting simulation device for combined cylinder body with three layers of compacted sand bodies Download PDFInfo
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- CN102042013B CN102042013B CN2010106024891A CN201010602489A CN102042013B CN 102042013 B CN102042013 B CN 102042013B CN 2010106024891 A CN2010106024891 A CN 2010106024891A CN 201010602489 A CN201010602489 A CN 201010602489A CN 102042013 B CN102042013 B CN 102042013B
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Abstract
The invention provides a near wellbore area cutting simulation device for a combined cylinder body with three layers of compacted sand bodies. The device comprises a multi-stage cylinder body consisting of at least two sections of closely connected cylinder bodies with unequal diameters, wherein a seal cap A and a seal cap B are arranged on the multi-stage cylinder body; the seal cap A is positioned on the end of the cylinder body at the first section, a seal pipeline connector a and a seal pipeline connector b are arranged on the seal cap A and the seal cap B respectively; an annular cylinder body in interference fit with the cylinder body at the first section is arranged in the cylinder body at the first section; a compacted sand body I is arranged between the lower surface of the annular cylinder body and the seal cap B, and a cylindrical hole communicated with the inner cavity of the annular cylinder body is formed in the compacted sand body I; compact sand bodies II are arranged in the cavity of the cylindrical hole, in the inner cavity of the annular cylinder body and between the upper surface of the annular cylinder body and the seal cap A; and a compacted sand body III layer is arranged between the compacted sand body I and the compacted sand bodies II.
Description
Technical field
The present invention relates to a kind of near wellbore zone shearing simulation device, belong to the near wellbore zone shearing simulation device in the lab simulation technique that improves recovery ratio in the oilfield injection field.
Background technology
Polymer flooding has become one of important technology that improves recovery ratio in oilfield development process.In the design stage of annotating poly-scheme, Properties of Copolymer Solution plays vital effect to annotating poly-schematic design, the parameter about Properties of Copolymer Solution related in schematic design all should be the performance of solution under actual reservoir condition, for the viscosity under these actual reservoir conditions, the parameters such as rheological characteristic, the approach obtained at present is divided into scene and obtains with lab simulation and obtain two kinds, scene obtains takes a sample by the drill sampling well exactly or at injection well, annotates nitrogen and return row's sampling (Geng Yuguang in annotating collecting process, Li Shanwei, Weng Yanping etc. Eor In Huabei Oilfield Pilot trial research [J]. drilling technique .1998, Zhang Zhen China etc. polymer displacement of reservoir oil site pilot test technology [M]. Beijing: polymer displacement of reservoir oil site pilot test technology, 1996:207, Wang Youqi, Zhang Yigen, Jiang Yanbo etc. affect several problems [J] of polymer Field Results. oilfield chemistry .1999:244-246.), indoorly can only shear the solution property obtain after shear its near wellbore zone by the simulation to polymer solution, the accuracy of simulation cutting method directly has influence on oil reservoir programming, the reasonability of dynamically following the tracks of and implementing to predict and accuracy, finally affects the polymer injection development effect.At present, the impact on Properties of Copolymer Solution is sheared in the desk research near wellbore zone, main employing WARING agitator (Zhang Qunzhi, Zhao Wenqiang, Chen Suping etc. the impact [J] of different cut modes on polymer solution and gelling performance. oilfield chemistry .2008:256-260; China National Offshore Oil Corporation's technical standard. offshore oilfield displacement of reservoir oil performance indications and the detection method [S] of acrylic amide salt tolerant polymer. China National Offshore Oil Corporation, 2006.), rock core pressure reduction shear (China National Offshore Oil Corporation's technical standard. the offshore oilfield displacement of reservoir oil is by performance indications and the detection method [S] of acrylic amide salt tolerant polymer. China National Offshore Oil Corporation, 2006; Yang Huaijun, Zhang Jie, Zhang Jingchun. Associating Polymer Solution Core-shearing Rheology behavioral study [J]. the journal .2007:102-105 of Southwest Petrol University; China National Petroleum Corporation's technical standard. displacement of reservoir oil acrylamide copolymer performance measurement [S]. China National Petroleum Corporation (CNPC), 1993:1994-1-6.), capillary tube shears (Zhou Haigang, Du Canmin, punishment will army. polymer is degraded in annotating poly-pipeline analog study [J] .2003:247-249; China National Petroleum Corporation's technical standard. displacement of reservoir oil acrylamide copolymer performance measurement [S]. China National Petroleum Corporation (CNPC), 2007.), near wellbore zone speed shearing simulation experimental facilities (Shu Zheng, Ye Zhongbin, Zhang Jian etc. polymer solution near wellbore zone speed shearing simulation experimental facilities design [J]. oil-gas geology and recovery ratio .2010:55-58.) etc. method study.Utilize the WARING agitator to shear polymer solution and be actually pure mechanical shearing, due to the difference of cut mode and stratum filtration cut mode, so it can not truly reflect the actual conditions that are sheared when polymer solution enters stratum.The method that rock core is sheared is to utilize injection pump to make polymer solution in intermediate receptacle by the core holding unit of simulation core is housed, thereby realizes the shearing to polymer solution; The equipment that the method needs mainly comprises injection pump, intermediate receptacle, the parts such as core holding unit, can be sheared later solution property by simulating polymer solution to a certain extent, but the method is because shear rate is discontinuous variation, in can only simulated formation, the shearing of certain point, can not simulate the shearing to polymer and other effects that flow velocity continuous acute variation near wellbore zone causes.Capillary tube is sheared owing to being the mobile generation of polymer in capillary tube inside, its flow regime is pipe stream, different from the flow regime of stratum filtration, cut mode is also different from the stratum filtration shearing, so it can not truly reflect the actual conditions that are sheared when polymer solution enters stratum, the core of near wellbore zone speed shearing simulation experimental facilities remains rock core and shears, just adopt fill out sand tube to replace rock core, in order to realize the variation of shear rate, adopted the fill out sand tube of 3 different-diameters, by changing injection rate to realize the shearing of different rates, polymer solution experience first paragraph fill out sand tube experiences second fill out sand tube after shearing again and shears, finally experiencing the 3rd section fill out sand tube shears, after every fill out sand tube is sheared, polymer solution has a process of placing and collecting, then just can carry out a next fill out sand tube shears, this process and actual near wellbore zone are sheared technique and are not met.
To sum up, existing simulation cutting method there are differences in the many-sides such as cut mode, shear distance, shear strength, shearing medium and actual conditions, cause existing evaluation method can not well estimate near wellbore zone and shear the impact that Properties of Copolymer Solution is produced, therefore in the lab simulation process, have limitation.
Summary of the invention
The purpose of this invention is to provide a kind of near wellbore zone analogue means can be at aspects such as cut mode, shear distance, shear strength, shearing media all coincide with actual conditions, by the variation of device shape, realize the variation of shear strength and shear distance, by adopting same or analogous percolating medium to realize the consistent of cut mode, make the near wellbore zone seepage environment of simulation more near actual conditions.
A kind of near wellbore zone provided by the invention shearing simulation device comprises the multi-stage cylindrical barrel be comprised of at least two sections close-connected not isometrical cylindrical tubes; Described multi-stage cylindrical barrel is provided with seal cover A and seal cover B; Described seal cover A is positioned at the described cylindrical tube end of first paragraph, on described seal cover A and seal cover B, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b; In the described cylindrical tube of first paragraph, be provided with the circle ring column of interference fit with it; Between the soffit of described circle ring column and described seal cover B, be provided with compacting sand body I, in described compacting sand body I, be provided with the cylindrical hole with the intracavity inter-connection of described circle ring column; In described cylindrical hole, be equipped with compacting sand body II in the inner chamber of described circle ring column and between the upper surface of described circle ring column and described seal cover A, be provided with compacting sand body III layer between described compacting sand body I and described compacting sand body II.
Above-mentioned analogue means, connect by Connection Element between described not isometrical cylindrical tube.
Between above-mentioned analogue means, described not isometrical cylindrical tube and described Connection Element, be connected or interference fit for thread seal.
Above-mentioned analogue means, described seal cover A are with described multi-stage cylindrical barrel with seal cover B that thread seal is connected or interference fit, for described multi-stage cylindrical barrel plays sealing function.Described seal cover A and seal cover B all can be made by the material of energy bearing certain pressure.
Above-mentioned analogue means, described seal cover A is that thread seal is connected or interference fit with described sealed tube wire terminal a, described sealed tube wire terminal a can closely be connected to provide fluid course with indoor displacement pipeline.
Above-mentioned analogue means, described seal cover B is that thread seal is connected or interference fit with described sealed tube wire terminal b, described sealed tube wire terminal b can closely be connected to provide fluid course with indoor displacement pipeline.
Above-mentioned analogue means, described sample tap is provided with seal cover C; Described seal cover C is that thread seal is connected or interference fit with described multi-stage cylindrical barrel; By described sample tap, displacement working solution sample can be obtained, thereby its pressure and other parameters can be tested.Obsolete the time, can use the passage of the described sample tap of seal cover C sealing.
Above-mentioned analogue means, the number of described sample tap can be regulated as required.
Above-mentioned analogue means, described circle ring column are annulus cement column, annulus stainless steel cylinder or annulus alloy steel cylinder; The height of described circle ring column is less than the height of the described cylindrical tube of first paragraph; The described cylindrical tube of the soffit of described circle ring column and first paragraph overlaps with the interface of the described cylindrical tube of second segment; The thickness of described circle ring column can adopt bit size and hole enlargement situation thereof to determine according to actual casing size and drilling well, the interior ring diameter of described circle ring column and the perforating bullet model of realistic objective well coupling.
Above-mentioned analogue means, the height of described cylindrical hole are less than the height of described compacting sand body I, and described cylindrical hole is used for the analogue perforation borehole, ring diameter and highly depend on and intend the perforating bullet model parameter of simulating in it; The surface of the nearly described seal cover A of described compacting sand body II is provided with filter; Described filter is screen casing, screen cloth or filter screen, and described filter is mainly used to the sand control screen in simulation oil well.
Above-mentioned analogue means, between described compacting sand body III and described compacting sand body I and compacting sand body II, be equipped with screen cloth or filter screen, be used for described compacting sand body I and described compacting sand body II are separated, be convenient to the making of described compacting sand body I and the making of described compacting sand body II.
Above-mentioned analogue means, the permeability of described compacting sand body I is consistent or close with the stratum relevant parameter of target well with degree of porosity, and the material adopted can be the sand of appearing, quartz sand, glass microballoon or haydite etc.
Above-mentioned analogue means, the permeability of described compacting sand body III layer and degree of porosity can be the 50%-100% of described compacting sand body I, are used near the structure that stratum is compacted perforation borehole that the analogue perforation bullet causes.
Above-mentioned analogue means, described compacting sand body II are mainly to simulate between described filter and described circle ring column and the interior gravel for the sand control filling of described cylindrical hole; The permeability of described compacting sand body is consistent or close with the sand control parameter of target well with degree of porosity.
Above-mentioned analogue means, the thickness of described compacting sand body III is consistent.
Shearing simulation device of the present invention is owing to having adopted above technical scheme, the percolating medium can analog operation liquid caused due to the variation of distance wellbore centre distance when the stratum filtration of near wellbore zone and the variation of seepage velocity; Can simulate the cut mode that the variation due to percolating medium causes changes; Can simulate near wellbore zone and shear the variation of the Properties of Copolymer Solution caused.Shearing simulation device provided by the invention can be widely used in oilfield chemistry and drive in raising recovery ratio technique.
The accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of near wellbore zone of the present invention shearing simulation device.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing, but the present invention is not limited to following examples.
Near wellbore zone of the present invention shearing simulation device as shown in Figure 1, in figure, each mark is as follows: 1 sealed tube wire terminal a, 2 seal cover A, 3 screen casings, 4,16,17 cylindrical tubes, 5 compacting quartz sand body II, 6 tapping sleeves, 7 annulus cement columns, 8 cylindrical holes, 9,18 box cuplings, 10 sample taps, 11 compacting quartz sand body I, 12 compacting quartz sand body III, 13 seal cover C, 14 seal cover B, 15 sealed tube wire terminal b.
Shearing simulation device of the present invention comprises three grades of cylindrical tubes that closely connected to form by not isometrical cylindrical tube 4, cylindrical tube 17 and cylindrical tube 18, be used to the seepage channel of variation is provided; Wherein, by box cupling 9, be tightly connected between cylindrical tube 4 and cylindrical tube 17, by box cupling 18, be tightly connected between cylindrical tube 17 and cylindrical tube 18; These three grades of cylindrical tubes are provided with seal cover A2 and seal cover B14, for these three grades of cylindrical tubes are played to sealing process; Seal cover A2 and seal cover B14 make by stainless steel; Seal cover A2 and seal cover B14 all are tightly connected by screw thread and this three grades of cylindrical tubes; Seal cover A2 is provided with sealed tube wire terminal a1, and seal cover A2 is connected by thread seal with sealed tube wire terminal a1, for indoor displacement pipeline, closely being connected to provide fluid course; Seal cover B14 is provided with sealed tube wire terminal b15, and seal cover B14 is connected by thread seal with sealed tube wire terminal b15, for indoor displacement pipeline, closely being connected to provide fluid course; These three grades of cylindrical tubes are provided with 3 sample taps 10, in needs, can with these three grades of cylindrical tubes, be communicated with extraneous, carry out performance test thereby obtain working solution; Sample tap 10 is provided with seal cover C13, can seal with seal cover C13 the passage of sample tap 10 obsolete the time; In cylindrical tube 4, be provided with the annulus cement column 7 with cylindrical tube 4 interference fit, the soffit of annulus cement column 7 and cylindrical tube 4 overlap with the interface of cylindrical tube 17, and the height of annulus cement column 7 is less than the height of cylindrical tube 4; Annulus cement column 7 is provided with tapping sleeve 6, and the perforate size of tapping sleeve 6 equates with the interior ring diameter of annulus cement column 7; Between the soffit of annulus cement column 7 and seal cover B14, be provided with compacting quartz sand body I 11, the permeability of compacting quartz sand body I 11 is consistent with the stratum relevant parameter of target well with degree of porosity; In compacting quartz sand body I 11, be provided with the cylindrical hole 8 with the intracavity inter-connection of annulus cement column 7, be used for the analogue perforation borehole, the height of cylindrical hole 8 is less than the height of compacting quartz sand body I 11; In cylindrical hole 8, in the inner chamber of annulus cement column 7 and be provided with compacting quartz sand body II 4 between tapping sleeve 6 and seal cover A2, the permeability of compacting quartz sand body II 4 is consistent with the sand control parameter of target well with the gap degree, can be by gravel according under sand control parameter (degree of porosity, the permeability) condition that can obtain with the simulated target well, making; The surface of compacting quartz sand body II4 is provided with screen casing 3, be used for simulating the screen casing in actual sand control structure, between compacting quartz sand body I 11 and compacting quartz sand body II4, be provided with the compacting quartz sand body III12 layer of consistency of thickness, the permeability of compacting quartz sand body III12 and degree of porosity are 60% of compacting quartz sand body I 11, are used near the structure that stratum is compacted perforation borehole that the analogue perforation bullet causes.
In above-mentioned shearing simulation device of the present invention, the material of seal cover A2 and seal cover B14 can also be can bearing certain pressure glass fiber reinforced plastic; Seal cover A2 can also be tightly connected by three grades of cylindrical tubes of interference fit and this with seal cover B14: seal cover A2 can also be connected by interference fit seal with sealed tube wire terminal a1; Seal cover B14 can also be connected by interference fit seal with sealed tube wire terminal b15; The number of sample tap 10 can be regulated as required, and seal cover C13 can also be tightly connected by interference fit and this three grades of cylindrical tubes.Annulus cement column 7 can also be annulus stainless steel cylinder or annulus alloy steel cylinder; The interior ring diameter of annulus cement column 6 and the diameter of cylindrical hole 7 all can be regulated according to the perforating bullet model of realistic objective well; Compacting quartz sand body I 11 can also be compacting appear sand body, compacting glass microballoon or compacting haydite etc., and its permeability and degree of porosity can be close with the stratum relevant parameter of target well; The permeability of compacting quartz sand body II 4 and degree of porosity can be close with the sand control parameter of target well; The permeability of annulus compacting quartz sand scapus 12 and degree of porosity can be the 50%-100% of compacting quartz sand body I 11; Screen casing 3 can also be screen cloth or filter screen.
While using shearing simulation device of the present invention, sealed tube wire terminal a1 closely is connected with indoor displacement pipeline, the displacement working solution is entered in these three grades of cylindrical tubes.The displacement working solution is seepage flow in the compacting quartz sand body II4 in cylindrical tube 4 at first, then after the interior ring by cylinder cement ring body 7, enter in cylindrical tube 16 and 17, in compacting quartz sand body II4, annulus quartz sand scapus 12 and compacting quartz sand body I 11 along seepage flow in the flow path direction of footpath; When need to measure the performance of displacement working solution, from sample tap 10, obtain the displacement working solution and carry out performance test; Displacement working solution after being completed can be discharged this three grades of cylindrical tubes from sealed tube wire terminal b15.
Claims (9)
1. near wellbore zone shearing simulation device, it is characterized in that: described device comprises the multi-stage cylindrical barrel be comprised of at least two sections close-connected not isometrical cylindrical tubes; Described multi-stage cylindrical barrel is provided with seal cover A and seal cover B; Described seal cover A is positioned at the described cylindrical tube end of first paragraph, on described seal cover A and seal cover B, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b; In the described cylindrical tube of first paragraph, be provided with the circle ring column of interference fit with it; Between the soffit of described circle ring column and described seal cover B, be provided with compacting sand body I, in described compacting sand body I, be provided with the cylindrical hole with the intracavity inter-connection of described circle ring column; In described cylindrical hole, be equipped with compacting sand body II in the inner chamber of described circle ring column and between the upper surface of described circle ring column and described seal cover A, be provided with compacting sand body III layer between described compacting sand body I and described compacting sand body II.
2. analogue means according to claim 1, is characterized in that: by Connection Element, connect between described not isometrical cylindrical tube.
3. analogue means according to claim 2 is characterized in that: for thread seal, be connected or interference fit between described not isometrical cylindrical tube and described Connection Element.
4. analogue means according to claim 1 and 2 is characterized in that: described seal cover A is with described multi-stage cylindrical barrel with seal cover B that thread seal is connected or interference fit.
5. analogue means according to claim 1 and 2, it is characterized in that: described seal cover A is that thread seal is connected or interference fit with described sealed tube wire terminal a.
6. analogue means according to claim 1 and 2, it is characterized in that: described seal cover B is that thread seal is connected or interference fit with described sealed tube wire terminal b.
7. analogue means according to claim 1 and 2, it is characterized in that: described circle ring column is annulus cement column, annulus stainless steel cylinder or annulus alloy steel cylinder; The height of described circle ring column is less than the height of the described cylindrical tube of first paragraph; The described cylindrical tube of the soffit of described circle ring column and first paragraph overlaps with the interface of the described cylindrical tube of second segment.
8. analogue means according to claim 1 and 2, it is characterized in that: the height of described cylindrical hole is less than the height of described compacting sand body I; The surface of the nearly described seal cover A of described compacting sand body II is provided with filter; Described filter is screen casing, screen cloth or filter screen; Between described compacting sand body III and described compacting sand body I and compacting sand body II, be equipped with screen cloth or filter screen.
9. analogue means according to claim 8, it is characterized in that: the thickness of described compacting sand body III is consistent.
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| CN109113687A (en) * | 2017-06-26 | 2019-01-01 | 中国石油天然气股份有限公司 | A kind of back-up sand pipe device of simulation core and fill and present method |
| CN109709266A (en) * | 2018-12-03 | 2019-05-03 | 中国石油集团川庆钻探工程有限公司 | A kind of straight well stratified reservoir flowing simulated experiment device and method |
| CN112377170B (en) * | 2021-01-08 | 2021-03-26 | 中国石油大学胜利学院 | Sand control well oil reservoir testing device |
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Effective date of registration: 20210803 Address after: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Patentee after: CNOOC RESEARCH INSTITUTE Co.,Ltd. Address before: 100010 No. 25 North Main Street, Dongcheng District, Beijing, Chaoyangmen Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC RESEARCH INSTITUTE Co.,Ltd. Patentee before: SOUTHWEST PETROLEUM University |