CN102121380B - Combined cylindrical barrel near wellbore area shear simulation device - Google Patents
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- CN102121380B CN102121380B CN201010602524.XA CN201010602524A CN102121380B CN 102121380 B CN102121380 B CN 102121380B CN 201010602524 A CN201010602524 A CN 201010602524A CN 102121380 B CN102121380 B CN 102121380B
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Abstract
The invention provides a combined cylindrical barrel near wellbore area shear simulation device. The device comprises a multistage cylindrical barrel consisting of at least two sections of cylindrical barrels which have unequal diameters and are tightly connected; the multistage cylindrical barrel is provided with a sealing cover A and a sealing cover B; the sealing cover A is positioned at the end of the first section of the cylindrical barrel; a sealing pipeline joint a and a sealing pipeline joint b are arranged on the sealing cover A and the sealing cover B respectively; an annulus cylinder which is in interference fit with the first section of the cylindrical barrel is arranged in the first section of the cylindrical barrel; cemented sand is filled between the lower surface of the annulus cylinder and the sealing cover B; and a cylindrical hole which is communicated with the inner cavity of the cylindrical barrel is formed in the cemented sand. The shear simulation device provided by the invention can be widely applied to a process for improving recovery ratio in oilfield chemical displacement.
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 the poly-scheme of note, 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 note 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 Zhi army. analog study [J] .2003:247-249 that polymer is degraded in the poly-pipeline of note; 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 multi-stage cylindrical barrel being comprised of at least two sections of 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 cylindrical tube end described in first paragraph, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b on described seal cover A and seal cover B; Described in first paragraph, in 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 cementing sand body, in described cementing sand body, be provided with the cylindrical hole with the intracavity inter-connection of described circle ring column.
Above-mentioned analogue means, connects by Connection Element between described not isometrical cylindrical tube.
Above-mentioned analogue means, between described not isometrical cylindrical tube and described Connection Element for thread seal is connected or interference fit.
Above-mentioned analogue means, described seal cover A is 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 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 cylindrical tube described in first paragraph; Described in the soffit of described circle ring column and first paragraph, cylindrical tube overlaps with the interface of cylindrical tube described in 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, 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 diameter of described cylindrical hole is more than or equal to the interior ring diameter of described circle ring column; The height of described cylindrical hole is less than the height of described cementing sand body.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.
Above-mentioned analogue means, the permeability of described cementing sand body, degree of porosity are consistent or close with the stratum relevant parameter of target well, and the material adopting can be the sand of appearing, quartz sand, glass microballoon or haydite etc.
Above-mentioned analogue means, the diameter of described multi-stage cylindrical barrel increases successively from described seal cover A end to described seal cover B end.
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 sample taps, 4,13,14 cylindrical tubes, 5 tapping sleeves, 6 annulus cement columns, 7 cylindrical holes, 8,15 box cuplings, 9 seal cover C, 10 cementing quartz sand bodies, 11 seal cover B, 12 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 13 and cylindrical tube 14, the diameter of cylindrical tube 4, cylindrical tube 13 and cylindrical tube 14 increases successively, for the seepage channel of variation is provided; Wherein, between cylindrical tube 4 and cylindrical tube 13, by box cupling 8, be tightly connected, between cylindrical tube 13 and cylindrical tube 14, by box cupling 15, be tightly connected; These three grades of cylindrical tubes are provided with seal cover A2 and seal cover B11, for these three grades of cylindrical tubes are played to sealing process; Seal cover A2 and seal cover B11 make by stainless steel; Seal cover A2 and seal cover B11 are all 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 being closely connected to provide fluid course with indoor displacement pipeline; Seal cover B11 is provided with sealed tube wire terminal b12, and seal cover B11 is connected by thread seal with sealed tube wire terminal b12, for being closely connected to provide fluid course with indoor displacement pipeline; These three grades of cylindrical tubes are provided with 3 sample taps 3, in needs, can be communicated with these three grades of cylindrical tubes extraneous, thereby obtain working solution, carry out performance test; Sample tap 3 is provided with seal cover C9, obsolete time, can seal with seal cover C9 the passage of sample tap 3; In cylindrical tube 4, be provided with the annulus cement column 6 with cylindrical tube 4 interference fit, the soffit of annulus cement column 6 and cylindrical tube 4 overlap with the interface of cylindrical tube 13, and the height of annulus cement column 6 is less than the height of cylindrical tube 4; 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; Between the soffit of annulus cement column 6 and seal cover B11, be provided with cementing quartz sand body 10, the permeability of cementing quartz sand body 10, degree of porosity are consistent with the stratum relevant parameter of target well; In cementing quartz sand body 10, be provided with the cylindrical hole 7 with the intracavity inter-connection of annulus cement column 6, be used for analogue perforation borehole, the diameter of cylindrical hole 7 equates with the interior ring diameter of annulus cement column 6, and the height of cylindrical hole 7 is less than the height of cementing quartz sand body 10.
In above-mentioned shearing simulation device of the present invention, the material of seal cover A2 and seal cover B11 can also be can bearing certain pressure glass fiber reinforced plastic; Seal cover A2 and seal cover B11 can also be tightly connected by interference fit and multi-stage cylindrical barrel; Seal cover A2 can also be connected by interference fit seal with sealed tube wire terminal a1; Seal cover B11 can also be connected by interference fit seal with sealed tube wire terminal b12; The number of sample tap 3 can regulate as required, and seal cover C9 can also be tightly connected by interference fit and this three grades of cylindrical tubes.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; The diameter of cylindrical hole 7 can be greater than the interior ring diameter of annulus cement column 6; Cementing quartz sand body 10 can also be the cementing sand body of appearing, cementing glass microballoon or cementing haydite etc., and its permeability, degree of porosity can be close with the stratum relevant parameter of target well.
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 these three grades of cylindrical tubes.Displacement working solution enters cylindrical hole 7 from the interior circulation of cylinder cement ring body 6, then seepage flow radially in cementing quartz sand body 10; When need to measure the performance of displacement working solution, from sample tap 3, obtain 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 b12.
Claims (9)
1. a near wellbore zone shearing simulation device, is characterized in that: described device comprises the multi-stage cylindrical barrel being comprised of at least two sections of 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 cylindrical tube end described in first paragraph, is respectively equipped with sealed tube wire terminal a and sealed tube wire terminal b on described seal cover A and seal cover B; Described in first paragraph, in 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 cementing sand body, in described cementing sand body, be provided with the cylindrical hole with the intracavity inter-connection of described circle ring column.
2. analogue means according to claim 1, is characterized in that: between described not isometrical cylindrical tube, by Connection Element, connect.
3. analogue means according to claim 2, is characterized in that: between described not isometrical cylindrical tube and described Connection Element for thread seal is connected or interference fit.
4. analogue means according to claim 3, 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 4, 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 5, 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 6, is characterized in that: described circle ring column is annulus cement column or annulus alloy steel cylinder; The height of described circle ring column is less than the height of cylindrical tube described in first paragraph; Described in the soffit of described circle ring column and first paragraph, cylindrical tube overlaps with the interface of cylindrical tube described in second segment.
8. analogue means according to claim 7, is characterized in that: the diameter of described cylindrical hole is more than or equal to the interior ring diameter of described circle ring column; The height of described cylindrical hole is less than the height of described cementing sand body.
9. analogue means according to claim 8, is characterized in that: the diameter of described multi-stage cylindrical barrel increases successively from described seal cover A end to described seal cover B end.
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| CN201010602524.XA CN102121380B (en) | 2010-12-14 | 2010-12-14 | Combined cylindrical barrel near wellbore area shear simulation device |
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| CN201010602524.XA CN102121380B (en) | 2010-12-14 | 2010-12-14 | Combined cylindrical barrel near wellbore area shear simulation device |
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| CN102121380A CN102121380A (en) | 2011-07-13 |
| CN102121380B true CN102121380B (en) | 2014-03-26 |
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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 |
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| US4799545A (en) * | 1987-03-06 | 1989-01-24 | Chevron Research Company | Bacteria and its use in a microbial profile modification process |
| US5142471A (en) * | 1990-04-05 | 1992-08-25 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Method for determining the pressure or stress of a geological formation from acoustic measurement |
| WO2001094982A2 (en) * | 2000-06-05 | 2001-12-13 | Schlumberger Technology Corporation | Determining stress parameters of formations from multi-mode velocity data |
| CN2748637Y (en) * | 2004-06-09 | 2005-12-28 | 中国石化胜利油田有限公司孤岛采油厂 | Hydraulic low shearing sampler |
| CN101845946A (en) * | 2010-05-31 | 2010-09-29 | 中国海洋石油总公司 | Method for simulating polymer solution shear and special equipment thereof |
| CN202064942U (en) * | 2010-12-14 | 2011-12-07 | 中国海洋石油总公司 | Shearing analogue device for immediate vicinity of wellbore for combined cylinder barrel |
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2010
- 2010-12-14 CN CN201010602524.XA patent/CN102121380B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4799545A (en) * | 1987-03-06 | 1989-01-24 | Chevron Research Company | Bacteria and its use in a microbial profile modification process |
| US5142471A (en) * | 1990-04-05 | 1992-08-25 | Board Of Supervisors Of Louisiana State University And Agricultural And Mechanical College | Method for determining the pressure or stress of a geological formation from acoustic measurement |
| WO2001094982A2 (en) * | 2000-06-05 | 2001-12-13 | Schlumberger Technology Corporation | Determining stress parameters of formations from multi-mode velocity data |
| CN2748637Y (en) * | 2004-06-09 | 2005-12-28 | 中国石化胜利油田有限公司孤岛采油厂 | Hydraulic low shearing sampler |
| CN101845946A (en) * | 2010-05-31 | 2010-09-29 | 中国海洋石油总公司 | Method for simulating polymer solution shear and special equipment thereof |
| CN202064942U (en) * | 2010-12-14 | 2011-12-07 | 中国海洋石油总公司 | Shearing analogue device for immediate vicinity of wellbore for combined cylinder barrel |
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Effective date of registration: 20210806 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 |