CN102052071B - Frustum cylinder-shaped near wellbore zone shear simulation device with sand prevention compacted sand bodies - Google Patents
Frustum cylinder-shaped near wellbore zone shear simulation device with sand prevention compacted sand bodies Download PDFInfo
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Abstract
The invention provides a frustum cylinder-shaped near wellbore zone shear simulation device with sand prevention compacted sand bodies. The device comprises a frustum-shaped cylinder which consists of a frustum cylinder and a columnar cylinder which is arranged at a small-aperture end of the frustum cylinder, wherein the frustum-shaped cylinder is provided with a sealing cover A and a sealing cover B; the sealing cover A is positioned at the columnar cylinder end; the sealing cover B is positioned at the frustum cylinder end; the sealing cover A and the sealing cover B are provided with a sealing pipeline joint a and a sealing pipeline joint b respectively; a circular column which is in interference fit with the columnar cylinder is arranged in the columnar cylinder; a cemented sand body is arranged between the lower surface of the circular column and the sealing cover B and is provided with a columnar hole which is communicated with the inner cavity of the circular column; and the compacted sand bodies are arranged in the columnar hole, in the inner cavity of the circular column and between the upper surface of the circular column and the sealing cover A. The shear simulation device provided by the invention can be widely applied to a process for enhancing recovery ratio in oilfield chemical flooding.
Description
Technical field
The present invention relates to a kind of near wellbore zone and shear analogue means, belong to the near wellbore zone of annotating in the lab simulation technology that improves recovery ratio in the poly-field in the oil field and shear analogue means.
Background technology
Polymer flooding has become one of important technology that improves recovery ratio in the oilfield development process.Annotating the poly-design for scheme stage, the polymer solution performance plays crucial effects to annotating poly-schematic design, what relate in the schematic design all should be the performance of solution under the actual reservoir condition about the parameter of polymer solution performance, for the viscosity under these actual reservoir conditions, parameters such as rheological characteristic, the approach that obtains at present is divided into the scene and obtains with lab simulation and obtain two kinds, the scene obtains exactly in annotating collecting process by the sampling of drill sampling well or annotates nitrogen at injection well and return row's sampling (Geng Yuguang, Li Shanwei, Weng Yanping etc. the guiding experimental study of North China Oilfield tertiary oil recovery [J]. drilling technology .1998; Zhang Zhen China etc. the on-the-spot pilot test technology [M] of polymer displacement of reservoir oil. Beijing: the on-the-spot pilot test technology of polymer displacement of reservoir oil, 1996:207; Wang Youqi, Zhang Yigen, Jiang Yanbo etc. several problems [J] of impact polymer mining site implementation result. oilfield chemistry .1999:244-246.); The indoor solution property that can only obtain by simulation shearing after shear its near wellbore zone 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, and poly-development effectiveness is annotated in final influence.At present, shear the polymer solution Effect on Performance desk research near wellbore zone, main employing WARING agitator (Zhang Qunzhi, Zhao Wenqiang, Chen Suping etc. different cut modes are to the influence [J] of polymer solution and gelling performance. oilfield chemistry .2008:256-260; China National Offshore Oil Corporation's technical standard. the offshore oilfield displacement of reservoir oil acrylic amide salt tolerant polymer properties index and detection method [S]. 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 with acrylic amide salt tolerant polymer properties index and detection method [S]. China National Offshore Oil Corporation, 2006; Yang Huaijun, Zhang Jie, Zhang Jingchun. association polymer solution core shear 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. analog study [J] .2003:247-249 that polymer is degraded in annotating poly-pipeline; 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 shears analogue experiment installation (Shu Zheng, Ye Zhongbin, Zhang Jian etc. polymer solution near wellbore zone speed is sheared analogue experiment installation 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, because 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 the stratum.The method that rock core is sheared is to utilize injection pump to make polymer solution in the intermediate receptacle by the core holding unit of simulation rock core is housed, thereby realizes the shearing to polymer solution; The equipment that this method needs mainly comprises injection pump, intermediate receptacle, parts such as core holding unit, can be sheared later solution property by simulating polymer solution to a certain extent, but this method is because shear rate is discontinuous variation, the shearing of certain point can not be simulated shearing and other effects to polymer that flow velocity continuous acute variation near wellbore zone causes in can only simulated formation.Capillary tube is sheared owing to be the mobile generation of polymer in capillary tube inside, its flow regime is pipe stream, different with the flow regime of stratum filtration, cut mode is also different with the stratum filtration shearing, so it can not truly reflect the actual conditions that are sheared when polymer solution enters the stratum; The core that near wellbore zone speed is sheared analogue experiment installation remains the rock core shearing, 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, experiencing second fill out sand tube again after first section fill out sand tube of polymer solution experience sheared shears, experiencing the 3rd section fill out sand tube at last shears, after every fill out sand tube is sheared, polymer solution has a process of placing and collecting, just can carry out a next fill out sand tube then and shear, this process is sheared technology with actual near wellbore zone and is not met.
To sum up, existing simulation cutting method there are differences in many-sides such as cut mode, shear distance, shear strength, shearing medium and actual conditions, cause existing evaluation method can not well estimate the near wellbore zone and shear the influence that the polymer solution performance 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 that can be at aspects such as cut mode, shear distance, shear strength, shearing media all coincide with actual conditions, realize the variation of shear strength and shear distance by the variation of device shape, by adopting same or analogous percolating medium to realize the unanimity of cut mode, make the near wellbore zone seepage environment of simulating more near actual conditions.
A kind of near wellbore zone provided by the invention is sheared analogue means and is comprised the round table-like cylindrical shell of being made up 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 the seal cover B; Be provided with the circle ring column of interference fit with it in the described cylindrical tube; Be provided with glued sand body between the soffit of described circle ring column and the described seal cover B, be provided with cylindrical hole in the described glued sand body with the intracavity inter-connection of described circle ring column; In the described cylindrical hole, be equipped with the compacting sand body in the inner chamber of described circle ring column and between the upper surface of described circle ring column and the described seal cover A.
Above-mentioned analogue means, described seal cover A are 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 so that fluid course to be provided 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 so that fluid course to be provided 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.Displacement working solution sample can be obtained by described sample tap, thereby its pressure and other parameters can be tested.Obsolete the 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 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 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, the interior ring diameter of described circle ring column and the perforating bullet model of realistic objective well coupling.
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 glued sand body; Described cylindrical hole is used for the analogue perforation borehole, and ring diameter and highly depending on is intended the perforating bullet model parameter simulated in it.
Above-mentioned analogue means, the surface of the nearly described seal cover A of described compacting sand body is provided with filter; Described filter can be screen casing, screen cloth or filter screen; Described filter is mainly used to simulate the sand control screen in the oil well.
Above-mentioned analogue means, described device also comprise another cylindrical tube on the soffit that is arranged on described round platform cylindrical shell; This cylindrical tube can be used for being connected with seal cover B, forms 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 need be connected with other devices but when not changing flowing velocity, screw thread that provides connection etc. is provided this cylindrical tube because of function.
Above-mentioned analogue means, the permeability of described glued sand body is consistent or close with the stratum relevant parameter of target well with degree of porosity, and the material that is adopted can be the sand of appearing, quartz sand, glass microballoon or haydite etc.
Above-mentioned analogue means, described compacting sand body mainly are to be used for simulating between described filter and the 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.
Shearing analogue means of the present invention has been owing to adopted above technical scheme, can analog operation liquid when the stratum filtration of near wellbore zone because the percolating medium that causes apart from the variation of wellbore centre distance and the variation of seepage velocity; Can simulate because the cut mode that the variation of percolating medium causes changes; Can simulate the near wellbore zone and shear the polymer solution changes of properties that causes.Shearing analogue means provided by the invention can be widely used in oilfield chemistry and drive in the raising recovery ratio technology.
Description of drawings
Fig. 1 is the overall structure schematic diagram that analogue means is sheared near wellbore zone of the present invention.
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.
Analogue means is sheared as shown in Figure 1 near wellbore zone of the present invention, each mark is as follows among the figure: 1 sealed tube wire terminal a, 2 seal cover A, 3 screen casings, 4 compacting quartz sand bodies, 5 perforate sleeve pipes, 6 annulus cement columns, 7 cylindrical holes, 8 sample taps, 9 glued quartz sand bodies, 10 round platform cylindrical shells, 11 seal cover C, 12 sealed tube wire terminal b, 13 seal cover B, 14,15 cylindrical tubes.
Shearing analogue means of the present invention comprises by round platform cylindrical shell 10 and the small-caliber end and the cylindrical tube 14 of heavy caliber end and the round table-like cylindrical shell that cylindrical tube 15 is formed that are separately positioned on round platform cylindrical shell 10, and is used to provide the seepage channel of radial variations; Round table-like cylindrical shell is provided with seal cover A2 and seal cover B13, is used for round table-like cylindrical shell is played sealing process; Seal cover A2 and seal cover B13 make by stainless steel; Seal cover A2 and seal cover B13 all are 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, is used for closely being connected so that fluid course to be provided with indoor displacement pipeline; Seal cover B13 is provided with sealed tube wire terminal b12, and seal cover B13 is connected by thread seal with sealed tube wire terminal b12, is used for closely being connected so that fluid course to be provided 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, carries out performance test thereby obtain working solution; Sample tap 8 is provided with seal cover C11, can seal the passage of sample tap 8 obsolete the time with seal cover C11; Be provided with annulus cement column 6 in the cylindrical tube 14 with cylindrical tube 14 interference fit, the soffit of annulus cement column 6 and round platform cylindrical shell 10 overlap with the interface of cylindrical tube 14, annulus cement column 6 is provided with perforate sleeve pipe 5, and the perforate size of perforate sleeve pipe 5 equates with the interior ring diameter of annulus cement column 6; Be provided with glued quartz sand body 9 in the round platform cylindrical shell 10, the permeability of glued quartz sand body 9, degree of porosity are consistent with the stratum relevant parameter of target well; Be provided with the cylindrical hole 7 with the intracavity inter-connection of annulus cement column 6 in the glued quartz sand body 9, be used for the analogue perforation borehole, the diameter of cylindrical hole 7 equates that with the interior ring diameter of annulus cement column 6 height of cylindrical hole 7 is less than the height of glued quartz sand body 9; In the cylindrical hole 7, in the inner chamber of annulus cement column 6 and be provided with compacting quartz sand body 4 between perforate sleeve pipe 5 and the seal cover A2, the permeability of compacting quartz sand body 4, degree of porosity are consistent with the stratum relevant parameter of target well, can be with gravel according to making under sand control parameter (degree of porosity, the permeability) condition that can obtain with the simulated target well; The surface of compacting quartz sand body 4 is provided with screen casing 3, is used for simulating the screen casing in the actual sand control structure.
In the above-mentioned shearing analogue means of the present invention, the material of seal cover A2 and seal cover B13 can also be can bearing certain pressure glass fiber reinforced plastic; Seal cover A2 and seal cover B13 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 B13 can also be connected by interference fit seal with sealed tube wire terminal b12; The number of sample tap 8 can be regulated as required, and seal cover C11 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 be regulated 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; Glued quartz sand body 9 can also be gluing appear sand body, glued glass microballoon or glued haydite etc., and its permeability, degree of porosity can be close with the stratum relevant parameter of target well; The permeability of compacting quartz sand body 4, degree of porosity can be close with the sand control parameter of target well; Screen casing 3 can also be screen cloth or filter screen.
When using shearing analogue means of the present invention, sealed tube wire terminal a1 closely is connected with indoor displacement pipeline, the displacement working solution is entered in the round table-like cylindrical shell.The displacement working solution is seepage flow in the compacting quartz sand body 4 in cylindrical tube 14 at first, enter in the frustum cone cylinder body 10 behind the interior ring by cylinder cement ring body 6 then, in compacting quartz sand body 4 and glued quartz sand body 9 along seepage flow in the flow path direction of footpath; When need measure, obtain the displacement working solution from sample tap 8 and carry out performance test the performance of displacement working solution; Displacement working solution after test finishes can be discharged cylindrical tube 15 from sealed tube wire terminal b12.
Claims (10)
1. analogue means is sheared in a near wellbore zone, it is characterized in that: described device comprises the round table-like cylindrical shell of being made up 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 the seal cover B; Be provided with the circle ring column of interference fit with it in the described cylindrical tube; Be provided with glued sand body between the soffit of described circle ring column and the described seal cover B, be provided with cylindrical hole in the described glued sand body with the intracavity inter-connection of described circle ring column; In the described cylindrical hole, be equipped with the compacting sand body in the inner chamber of described circle ring column and between the upper surface of described circle ring column and the described seal cover A.
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 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 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 glued sand body.
9. analogue means according to claim 8 is characterized in that: the surface of the nearly described seal cover A of described compacting sand body is provided with filter; Described filter is screen casing, screen cloth or filter screen.
10. analogue means according to claim 9 is characterized in that: described device also comprises another cylindrical tube that is arranged on described round platform cylindrical shell heavy caliber end.
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| CN102589946B (en) * | 2012-02-12 | 2013-10-16 | 山东科技大学 | Anchor-contained test piece preparation method and device |
| 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 |
| CN103541675B (en) * | 2013-11-12 | 2015-12-09 | 西南石油大学 | A kind of well cementation flushing liquor evaluating apparatus based on shear rate principle and method |
| CN104777272B (en) * | 2015-04-20 | 2017-03-01 | 西南石油大学 | For measuring the secondary shear method of Polymer Used For Oil Displacement solution property parameter |
| CN104777273B (en) * | 2015-04-20 | 2017-03-22 | 西南石油大学 | Third-order shear method for determining performance parameter of polymer solution for oil displacement |
| 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: 20210817 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 |