CN102116149B - Round-table-barrel-shaped near-well-bore shear simulating device with three layers of compaction sand bodies - Google Patents
Round-table-barrel-shaped near-well-bore shear simulating device with three layers of compaction sand bodies Download PDFInfo
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Abstract
The invention provides a round-table-barrel-shaped near-well-bore shear simulating device with three layers of compaction sand bodies. The device comprises a round-table-shaped barrel which consists of a round table barrel and a cylindrical barrel arranged at the small-bore end of the round table barrel, wherein the round-table-shaped barrel is provided with a sealing cover A and a sealing cover B; the sealing cover A is positioned at the end of the cylindrical barrel; the sealing cover B is positioned at the end of the round table barrel; the sealing cover A and the sealing cover B are provided with a sealed pipeline joint a and a sealed pipeline joint b respectively; a circular cylinder which is in interference fit with the cylindrical barrel is arranged in the cylindrical barrel; a compaction sand body I is arranged between the lower surface of the circular cylinder and the sealing cover B; a cylindrical hole communicated with the inner cavity of the circular cylinder is formed in the compaction sand body I; compaction sand bodies II are arranged in the cylindrical hole, in the inner cavity of the circular cylinder and between the upper surface of the circular cylinder and the sealing cover A; and a compaction sand body layer III is arranged between the compaction sand body I and the compaction sand body II. The shear simulating device provided by the invention can be widely applied in an oilfield chemical flooding enhanced oil recovery process.
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 oilfield injection field.
Background technology
Polymer flooding has become one of important technology improving in oilfield development process recovery ratio.In the design stage of noting poly-scheme, Properties of Copolymer Solution plays vital effect to noting poly-schematic design, the parameter about Properties of Copolymer Solution relating 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 obtaining is at present divided into scene and obtains with lab simulation and obtain two kinds, scene obtains and in noting collecting process, by drill sampling well, samples exactly or at injection well, note nitrogen and return row's sampling (Geng Yuguang, 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 the simulation by polymer solution shear the solution property that obtain after shear its near wellbore zone, the accuracy of simulation cutting method directly has influence on oil reservoir programming, dynamically follows the tracks of and implement reasonability and the accuracy of prediction, finally affects polymer injection development effect.At present, the impact on Properties of Copolymer Solution is sheared in desk research near wellbore zone, main employing WARING agitator (Zhang Qunzhi, Zhao Wenqiang, Chen Suping etc. different cut modes are on the impact of polymer solution and gelling performance [J]. oilfield chemistry .2008:256-260; China National Offshore Oil Corporation's technical standard. performance indications and the detection method [S] of acrylic amide salt tolerant polymer for the offshore oilfield displacement of reservoir oil. China National Offshore Oil Corporation, 2006.), rock core pressure reduction shearing (China National Offshore Oil Corporation's technical standard. performance indications and the detection method [S] of acrylic amide salt tolerant polymer for the offshore oilfield displacement of reservoir oil. 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. acrylamide copolymer performance measurement [S] for the displacement of reservoir oil. China National Petroleum Corporation (CNPC), 1993:1994-1-6.), capillary tube shears (Zhou Haigang, Du Canmin ，Xing will army. analog study [J] .2003:247-249 that polymer is degraded in noting poly-pipeline; China National Petroleum Corporation's technical standard. acrylamide copolymer performance measurement [S] for the displacement of reservoir oil. 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 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, the shearing of certain point in can only simulated formation, can not simulate that flow velocity continuous acute variation near wellbore zone causes to the shearing of polymer and other effects.Capillary tube is sheared owing to being that polymer is in the mobile generation of capillary tube inside, its flow regime is pipe stream, different from the flow regime of stratum filtration, cut mode is also different from 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 of 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 fill out sand tube next 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 evaluate near wellbore zone and shear the impact that Properties of Copolymer Solution is produced, therefore in lab simulation process, have limitation.
Summary of the invention
The object of this invention is to provide a kind of can be at aspects such as cut mode, shear distance, shear strength, shearing media all with the identical near wellbore zone analogue means of 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 approach actual conditions.
A kind of near wellbore zone provided by the invention shearing simulation device comprises the round table-like cylindrical shell being comprised of round platform cylindrical shell and the cylindrical tube that is arranged on described round platform cylindrical shell small-caliber end; Described round table-like cylindrical shell is provided with seal cover A and seal cover B; Described seal cover A is positioned at described cylindrical tube end, and described seal cover B is positioned at described round platform cylindrical shell end, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b on described seal cover A and seal cover B; In described cylindrical tube, 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, between described compacting sand body I and described compacting sand body II, be provided with compacting sand body III layer.
Above-mentioned analogue means, described seal cover A is with described round table-like cylindrical shell with seal cover B that thread seal is connected or interference fit, for described round table-like cylindrical shell 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 round table-like cylindrical shell is provided with at least one sample tap; Described sample tap is provided with seal cover C; Described seal cover C is that thread seal is connected or interference fit with described round table-like cylindrical shell.By described sample tap, displacement working solution sample can be obtained, thereby its pressure and other parameters can be tested.Obsolete time, can use seal cover C to seal the passage of described sample tap.
Above-mentioned analogue means, the number of described sample tap can regulate as required.
Above-mentioned analogue means, 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 described cylindrical tube; The soffit of described circle ring column and described cylindrical tube overlap with the interface of described round platform cylindrical shell; 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, and the interior ring diameter of described circle ring column mates with the perforating bullet model of realistic objective well.
Above-mentioned analogue means, the height of described cylindrical hole is less than the height of described compacting sand body I, and described cylindrical hole is used for analogue perforation borehole, and in it, ring diameter and highly depending on is intended the perforating bullet model parameter of simulating; 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 to separate, be convenient to the making of described compacting sand body I and the making of described compacting sand body II.
Above-mentioned analogue means, described device also comprises another cylindrical tube on the soffit that is arranged on described round platform cylindrical shell; This cylindrical tube can, for being connected with seal cover B, form closed cavity; Also can be when described device length can not be satisfied the demand, this cylindrical tube is connected with follow-up other devices; Or because function need to be connected with other devices but while not changing flowing velocity, this cylindrical tube is for providing the screw thread etc. of connection.
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 adopting 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 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 analogue perforation bullet causes.
Above-mentioned analogue means, described compacting sand body II is mainly for simulating between described filter and described circle ring column and the interior gravel for 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 causing due to the variation apart from 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 causing.Shearing simulation device provided by the invention can be widely used in oilfield chemistry and drive in raising recovery ratio technique.
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
Below in conjunction with accompanying drawing, the invention will be further described, 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 compacting sand body II, 5 tapping sleeves, 6 annulus cement columns, 7 cylindrical holes, 8 sample taps, 9 compacting sand body I, 10 compacting quartz sand body III, 11 round platform cylindrical shells, 12 seal cover C, 13 sealed tube wire terminal b, 14 seal cover B, 15,16 cylindrical tubes.
Shearing simulation device of the present invention comprises by round platform cylindrical shell 11 and is separately positioned on the round table-like cylindrical shell that the small-caliber end of round platform cylindrical shell 11 and the cylindrical tube 15 of heavy caliber end and cylindrical tube 16 form, for the seepage channel of radial variations is provided; Round table-like cylindrical shell is provided with seal cover A2 and seal cover B14, for round table-like cylindrical shell is played to sealing process; Seal cover A2 and seal cover B14 make by stainless steel; Seal cover A2 and seal cover B14 are all tightly connected by screw thread and round table-like cylindrical shell; 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 being closely connected to provide fluid course with indoor displacement pipeline; Seal cover B14 is provided with sealed tube wire terminal b13, and seal cover B14 is connected by thread seal with sealed tube wire terminal b13, for being closely connected to provide fluid course with indoor displacement pipeline; Round table-like cylindrical shell is provided with 3 sample taps 8, in needs, can be communicated with round table-like cylindrical shell extraneous, thereby obtain working solution, carries out performance test; Sample tap 8 is provided with seal cover C12, obsolete time, can seal with seal cover C12 the passage of sample tap 8.In cylindrical tube 15, be provided with the annulus cement column 6 with cylindrical tube 15 interference fit, the soffit of annulus cement column 6 and round platform cylindrical shell 11 overlap with the interface of cylindrical tube 15, annulus cement column 6 is provided with tapping sleeve 5, and the perforate size of tapping sleeve 5 equates with the interior ring diameter of annulus cement column 6; In round platform cylindrical shell 11, be provided with compacting quartz sand body I 9, the permeability of compacting quartz sand body I 9 is consistent with the stratum relevant parameter of target well with degree of porosity; In compacting quartz sand body I 9, be provided with the cylindrical hole 7 with the intracavity inter-connection of annulus cement column 6, the height of cylindrical hole 7 is less than the height of compacting quartz sand body I 9, be used for analogue perforation borehole, in cylindrical hole 7, be provided with compacting quartz sand body II4 in the inner chamber of annulus cement column 6 and between the upper surface of cylindrical tube 15 and seal cover A2, the permeability of compacting quartz sand body II4 is consistent with the sand control parameter of target well with gap degree, can be by gravel according to making under sand control parameter (degree of porosity, the permeability) condition that can obtain with simulated target well; The surface of compacting quartz sand body II 4 is provided with screen casing 3, is used for simulating the screen casing in actual sand control structure; Between compacting quartz sand body I 9 and compacting quartz sand body II 4, be provided with the compacting quartz sand body III10 layer of consistency of thickness, the permeability of compacting quartz sand body III10 and degree of porosity are 60% of compacting quartz sand body I 9, are used near the structure that stratum is compacted perforation borehole that 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 and seal cover B 14 can also be tightly connected by interference fit and round table-like cylindrical shell; 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 b13; The number of sample tap 8 can regulate as required, and seal cover C12 can also be tightly connected by interference fit and round table-like cylindrical shell.Annulus cement column 6 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 regulate according to the perforating bullet model of realistic objective well; Compacting quartz sand body I 9 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 II4 and degree of porosity can be close with the sand control parameter of target well; The permeability of compacting quartz sand body III10 and degree of porosity can be the 50%-100% of compacting quartz sand body I 9; 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 is closely connected with indoor displacement pipeline, displacement working solution is entered in round table-like cylindrical shell.Displacement working solution is the compacting quartz sand body II 4 interior seepage flow in cylindrical tube 15 first, then after the interior ring by cylinder cement ring body 6, enter in frustum cone cylinder body 11, in compacting quartz sand body II 4, compacting quartz sand body III10 and compacting quartz sand body I 9 along seepage flow in the flow path direction of footpath; When need to measure the performance of displacement working solution, from sample tap 8, obtain displacement working solution and carry out performance test; Displacement working solution after being completed can be discharged cylindrical tube 16 from sealed tube wire terminal b13.
Claims (10)
1. a near wellbore zone shearing simulation device, is characterized in that: described device comprises the round table-like cylindrical shell being comprised of round platform cylindrical shell and the cylindrical tube that is arranged on described round platform cylindrical shell small-caliber end; Described round table-like cylindrical shell is provided with seal cover A and seal cover B; Described seal cover A is positioned at described cylindrical tube end, and described seal cover B is positioned at described round platform cylindrical shell end, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b on described seal cover A and seal cover B; In described cylindrical tube, 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, between described compacting sand body I and described compacting sand body II, be provided with compacting sand body III layer.
2. analogue means according to claim 1, is characterized in that: described seal cover A is with described round table-like cylindrical shell with seal cover B that thread seal is connected or interference fit.
3. analogue means according to claim 1 and 2, is characterized in that: described seal cover A is that thread seal is connected or interference fit with described sealed tube wire terminal a.
4. analogue means according to claim 3, is characterized in that: described seal cover B is that thread seal is connected or interference fit with described sealed tube wire terminal b.
5. analogue means according to claim 4, is characterized in that: described round table-like cylindrical shell is provided with at least one sample tap; Described sample tap is provided with seal cover C.
6. analogue means according to claim 5, is characterized in that: described seal cover C is that thread seal is connected or interference fit with described round table-like cylindrical shell.
7. analogue means according to claim 6, 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 described cylindrical tube; The soffit of described circle ring column and described cylindrical tube overlap with the interface of described round platform cylindrical shell.
8. analogue means according to claim 7, 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 layer 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, is characterized in that: described device also comprises another cylindrical tube that is arranged on described round platform cylindrical shell heavy caliber end.
10. analogue means according to claim 9, is characterized in that: the thickness of described compacting sand body III layer is consistent.
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| CN102278096A (en) * | 2011-08-30 | 2011-12-14 | 中国石油天然气股份有限公司 | Artificial well wall sand prevention simulation test device and test method |
| CN102590031B (en) * | 2012-02-21 | 2014-03-19 | 中国海洋石油总公司 | Method for measuring critical molecular weight of fuel scavenge polymer for shearing in immediate vicinity of wellbore |
| CN109113687B (en) * | 2017-06-26 | 2024-05-28 | 中国石油天然气股份有限公司 | Sand filling pipe device for simulating rock core and filling method |
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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 |