CN103674806B - The pore-level analogue experiment installation of pore scale elastic microsphere migration in porous medium - Google Patents
The pore-level analogue experiment installation of pore scale elastic microsphere migration in porous medium Download PDFInfo
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Abstract
The present invention relates to the pore-level analogue experiment installation of pore scale elastic microsphere migration in a kind of porous medium, belong to pore-level flow simulation technology field.The present invention is directed to the pore throat characteristic of true reservoir rocks and the size characteristics of pore scale elastic microsphere, devise a kind of microcosmic visual suprasil sand mo(u)ld type being applicable to pore scale elastic microsphere, and construct image real-time acquisition and data analysis system, achieve the Real Time Observation of pore scale elastic microsphere migration process and distribution image and remaining oil distribution image and collection and quantitative test; Achieve the real-time measurement of injection pressure in the migration of pore scale elastic microsphere and oil displacement process; Achieve pore scale elastic microsphere output concentration, water percentage, the metering of oil offtake and analysis.The microcosmic visual suprasil sand mo(u)ld type of design can reflect the pore throat characteristic of true reservoir rocks, and form because this model utilizes suprasil sand to fill and present, easy to clean, can repeat to fill and present use simultaneously.
Description
Technical field
The present invention relates to the pore-level analogue experiment installation of pore scale elastic microsphere migration in a kind of porous medium, belong to pore-level flow simulation technology field.
Background technology
Along with oil field enters height/ultra-high water cut stage, water flooding Problems existing becomes increasingly complex, and the difficulty of steady oil control water is also increasing, and traditional profile control technique radius of action is little, plugging strength is limited, the volume increase term of validity is short, weak effect, can not meet the requirement of profile control.For this reason, various deep profile controlling (driving) technology is suggested in succession, and is widely used.Wherein, pore scale elastic microsphere deep profile correction technology obtains enough attention with the peculiar property of pore scale elastic microsphere.
With traditional inorganic particle, volume expansion grain, the profile control agents such as gel-like are compared, pore scale elastic microsphere has heatproof, salt resistance ability is strong, plugging strength is high, it is convenient to inject, the advantage such as good in economic efficiency, its cardinal principle is the nano-micro level pore throat size feature for reservoir rocks, synthesize the pore scale elastic microsphere matched, the elasticity of pore scale elastic microsphere dependence self, by " the shutoff in rock porous medium migration process, divided fluid stream-distortion, recover, migration-indepth plugging, divided fluid stream " mechanism, in high permeability zone constantly shutoff and migration, through oil reservoir deep, thus improve swept volume and the efficiency of displacement of remaining oil enriched area, oil reservoir deep, increase substantially the recovery ratio of crude oil.
The seepage flow of pore scale elastic microsphere in porous medium is an extremely complicated process, and it relates to the migration of pore scale elastic microsphere in porous medium, shutoff, deformation mechanism, also relates to the interaction between itself and crude oil, rock.Determine that the key issue of pore scale elastic microsphere deep profile correction technology application prospect is: describe the migration mechanism of pore scale elastic microsphere in porous medium scientifically and rationally and improve recovery mechanism.Therefore, carry out the pore-level modeling effort of pore scale elastic microsphere migration in porous medium, not only there is important theory significance, and there is important actual value.
In order to disclose the migration mechanism of pore scale elastic microsphere and improve recovery mechanism comprehensively, just need by microcosmic Visualization Model.At present, the most frequently used microcosmic Visualization Model is microcosmic etching model.Microcosmic etching model adopts optical etching technology to be engraved on the materials such as glass by the pore throat characteristic light after amplification, and after hf etching, high temperature sintering is shaping forms.But this model is two dimensional model, be etched on the materials such as glass be amplify after pore throat feature, accurately can not reflect the porous medium feature of true reservoir rocks; Meanwhile, the Pore throat size etching model due to the size of pore scale elastic microsphere and microcosmic belongs to the same order of magnitude, and after causing pore scale elastic microsphere to inject microcosmic etching model, be difficult to cleaning, repeatability is poor, and cannot realize quantitative measurment.
Therefore, the migration mechanism of pore scale elastic microsphere to being disclosed all sidedly and improve recovery mechanism, with regard to needing the size characteristics from true reservoir rocks pore throat characteristic and pore scale elastic microsphere, building new microcosmic Visualization Model and simulation system.
Summary of the invention
For the above-mentioned shortcoming of prior art, the invention provides the pore-level analogue experiment installation of pore scale elastic microsphere migration in a kind of porous medium, the object of the invention is the size characteristics of pore throat characteristic according to true reservoir rocks and pore scale elastic microsphere, design a kind of microcosmic visual suprasil sand mo(u)ld type being applicable to pore scale elastic microsphere, and build image real-time acquisition and data analysis system, by the method that microexamination and quantitative test combine, inherently be familiar with the migration mechanism of pore scale elastic microsphere and improve recovery mechanism, thus for pore scale elastic microsphere deep profile correction technology heavy industrialization application theoretical direction is provided.
The technical solution adopted for the present invention to solve the technical problems is achieved in that
The pore-level analogue experiment installation of pore scale elastic microsphere migration in a kind of porous medium, comprise micro pump, the first intermediate receptacle, the second intermediate receptacle, the 3rd intermediate receptacle, pressure transducer, microcosmic visual suprasil sand mo(u)ld type, sampler, vacuum pump, bubble tower and computing machine, wherein, micro pump is provided with pipeline and valve is connected with the first intermediate receptacle, the second intermediate receptacle, the 3rd intermediate receptacle, pressure transducer, microcosmic visual suprasil sand mo(u)ld type, sampler, vacuum pump, bubble tower successively; Pressure transducer is connected with computing machine by the first data line; The top of microcosmic visual suprasil sand mo(u)ld type is provided with 3 D video microscope, 3 D video microscope is provided with the second data line and is connected with computing machine; Hot water circulation heated device is provided with below microcosmic visual suprasil sand mo(u)ld type, hot water circulation heated device is provided with water inlet pipe be connected with thermostatic circulation bath with rising pipe, be placed with sampling cup in sampler, sampler be provided with three-way connection and be connected with bubble tower with the vacuum pump of side.
In said apparatus, the adjustable extent of micro pump flow velocity is 0.001 ~ 1200mL/h; First intermediate receptacle, the second intermediate receptacle, the 3rd intermediate receptacle are respectively used to deposit simulated formation water, simulated oil and pore scale elastic microsphere suspending liquid; The measuring accuracy of pressure transducer is 0.001kPa, and frequency acquisition is 5 times/s; 3 D video microscope is supporting image acquisition analysis software, can carry out recording a video and taking pictures, video recording speed limit is 360 frames/s, the camera function pixel upper limit is 1,600 ten thousand, also can carry out Measurement accuracy to parameters such as length and width, diameter, angle, areas, measurement of length precision is 0.001 μm, the measuring accuracy of angle is 0.001 degree; The temperature of adjustment thermostatic circulation bath, can control the temperature of fluid in microcosmic visual suprasil sand mo(u)ld type; Sampling cup for separating of with metering produced fluid; Vacuum pump is used for vacuumizing saturation simulation local water to microcosmic visual suprasil sand mo(u)ld type; Liquid in bubble tower is deionized water.
In the pore-level analogue experiment installation of pore scale elastic microsphere migration in above-mentioned porous medium, microcosmic visual suprasil sand mo(u)ld type adopts transparent organic glass processing, and filling suprasil sand is made, the making step of microcosmic visual suprasil sand mo(u)ld type is specific as follows:
(1) cut transparent plexiglass plate with special cutting tool, make microcosmic visual suprasil sand mo(u)ld type lower shoe;
(2) groove is got out by special cut drill in the centre position of microcosmic visual suprasil sand mo(u)ld type lower shoe;
(3) cut transparent plexiglass plate with special cutting tool, make microcosmic visual suprasil sand mo(u)ld type upper cover plate;
(4) respectively get out the threaded hole of certain internal diameter in the centre position, two ends of microcosmic visual suprasil sand mo(u)ld type upper cover plate with special screw thread drill bit, threaded hole, as the entrance and exit of fluid, is linked in experiment flow by plastic whorl joint;
(5) upper cover plate of visual for microcosmic suprasil sand mo(u)ld type and lower shoe are stacked together, and by clamp, on the upper cover plate and lower shoe of microcosmic visual suprasil sand mo(u)ld type, then get out the threaded hole of the certain internal diameter of some with special screw thread drill bit;
(6) by iron screw, the upper cover plate of visual for microcosmic suprasil sand mo(u)ld type and lower shoe are fixed, sealed by soft washer between the upper cover plate of microcosmic visual suprasil sand mo(u)ld type and lower shoe, the space formed between the upper cover plate of microcosmic visual suprasil sand mo(u)ld type and lower shoe, as the space of filling suprasil sand;
(7) with the outlet on plastics screw shutoff microcosmic visual suprasil sand mo(u)ld type upper cover plate, then from entrance toward filling suprasil sand the space that the upper cover plate of microcosmic visual suprasil sand mo(u)ld type and lower shoe are formed, suprasil sand is prepared by the sub-sieve of different meshes, in stowing operation, beat model gently, guarantee that suprasil sandfilling is closely knit, even.
The present invention is on the basis of true reservoir rocks pore throat characteristic and pore scale elastic microsphere size characteristics, under certain temperature conditions, pore scale elastic microsphere suspending liquid is injected in microcosmic visual suprasil sand mo(u)ld type, realizes the Real Time Observation of pore scale elastic microsphere migration process and distribution image and remaining oil distribution image and collection and quantitative test; By pressure transducer, realize the real-time measurement of injection pressure in the migration of pore scale elastic microsphere and oil displacement process; Be separated by sampling cup in sampler and metering produced fluid, realize pore scale elastic microsphere output concentration, water percentage, the metering of oil offtake and analysis.By the method that microexamination and quantitative test combine, the migration mechanism of research pore scale elastic microsphere and raising recovery mechanism.
This beneficial effect of the invention is: the pore-level analogue experiment installation that the invention provides pore scale elastic microsphere migration in a kind of porous medium, the invention has the advantages that: the present invention is directed to the pore throat characteristic of true reservoir rocks and the size characteristics of pore scale elastic microsphere, devise a kind of microcosmic visual suprasil sand mo(u)ld type being applicable to pore scale elastic microsphere, and construct image real-time acquisition and data analysis system, achieve the Real Time Observation of pore scale elastic microsphere migration process and distribution image and remaining oil distribution image and collection and quantitative test, achieve the real-time measurement of injection pressure in the migration of pore scale elastic microsphere and oil displacement process, achieve pore scale elastic microsphere output concentration, water percentage, the metering of oil offtake and analysis.The microcosmic visual suprasil sand mo(u)ld type of design can reflect the pore throat characteristic of true reservoir rocks, and form because this model utilizes suprasil sand to fill and present, easy to clean, can repeat to fill and present use simultaneously.Therefore, the present invention is the pore-level analogue experiment installation of pore scale elastic microsphere migration in a kind of porous medium of practicality.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the pore-level analogue experiment installation structural representation of pore scale elastic microsphere migration in a kind of porous medium of the present invention.
Fig. 2 is the front elevation of microcosmic visual suprasil sand mo(u)ld type lower shoe in one embodiment of the present of invention.
Fig. 3 is the left view (A-A) of microcosmic visual suprasil sand mo(u)ld type lower shoe in one embodiment of the present of invention.
Fig. 4 is the vertical view (B-B) of microcosmic visual suprasil sand mo(u)ld type lower shoe in one embodiment of the present of invention.
Fig. 5 is threaded hole, entrance and exit distributing position figure in one embodiment of the present of invention on microcosmic visual suprasil sand mo(u)ld type upper cover plate.
Description of symbols in figure: 1, micro pump; 2, valve; 3, pipeline; 4, the first intermediate receptacle; 5, the second intermediate receptacle; 6, the 3rd intermediate receptacle; 7, pressure transducer; 8, microcosmic visual suprasil sand mo(u)ld type; 9, sampler; 10, three-way connection; 11, vacuum pump; 12, bubble tower; 13, the first data line; 14, computing machine; 15, the second data line; 16,3 D video microscope; 17, hot water circulation heated device; 18, rising pipe; 19, thermostatic circulation bath; 20, water inlet pipe; 21, sampling cup.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described, better to understand the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
The pore-level analogue experiment installation of pore scale elastic microsphere migration in porous medium as shown in Figure 1, comprise micro pump 1, first intermediate receptacle 4, second intermediate receptacle 5, 3rd intermediate receptacle 6, pressure transducer 7, microcosmic visual suprasil sand mo(u)ld type 8, sampler 9, vacuum pump 11, bubble tower 12 and computing machine 14, wherein, micro pump 1 is provided with pipeline 3 and valve 2 successively with the first intermediate receptacle 4, second intermediate receptacle 5, 3rd intermediate receptacle 6, pressure transducer 7, microcosmic visual suprasil sand mo(u)ld type 8, sampler 9, vacuum pump 11, bubble tower 12 is connected, pressure transducer 7 is connected with computing machine 14 by the first data line 13, the top of microcosmic visual suprasil sand mo(u)ld type 8 is provided with 3 D video microscope 16,3 D video microscope 16 is provided with the second data line 15 and is connected with computing machine 14, hot water circulation heated device 17 is provided with below microcosmic visual suprasil sand mo(u)ld type 8, hot water circulation heated device 17 is provided with water inlet pipe 20 to be connected with thermostatic circulation bath 19 with rising pipe 18, be placed with sampling cup 21 in sampler 9, sampler 9 be provided with three-way connection 10 and be connected with bubble tower 12 with the vacuum pump 11 of side.
In said apparatus, the adjustable extent of micro pump 1 flow velocity is 0.001 ~ 1200mL/h; First intermediate receptacle 4, second intermediate receptacle 5, the 3rd intermediate receptacle 6 are respectively used to deposit simulated formation water, simulated oil and pore scale elastic microsphere suspending liquid; The measuring accuracy of pressure transducer 6 is 0.001kPa, and frequency acquisition is 5 times/s; 3 D video microscope 14 is supporting image acquisition analysis software, can carry out recording a video and taking pictures, video recording speed limit is 360 frames/s, the camera function pixel upper limit is 1,600 ten thousand, also can carry out Measurement accuracy to parameters such as length and width, diameter, angle, areas, measurement of length precision is 0.001 μm, the measuring accuracy of angle is 0.001 degree; The temperature of adjustment thermostatic circulation bath 19, can control the temperature of fluid in microcosmic visual suprasil sand mo(u)ld type 8; Sampling cup 21 for separating of with metering produced fluid; Vacuum pump 11 is used for vacuumizing saturation simulation local water to microcosmic visual suprasil sand mo(u)ld type 8; Liquid in bubble tower 12 is deionized water.
See Fig. 2, Fig. 3, Fig. 4, Fig. 5, in embodiments of the present invention, the pore-level analogue experiment installation of pore scale elastic microsphere migration in a kind of porous medium, microcosmic visual suprasil sand mo(u)ld type 8 adopts transparent organic glass to process, and filling suprasil sand is made, the making step of microcosmic visual suprasil sand mo(u)ld type 8 is:
(1) cut transparent plexiglass plate with special cutting tool, make microcosmic visual suprasil sand mo(u)ld type 8 lower shoe, the length of base plate is 10.0cm, and width is 4.5cm, and thickness is 0.7cm;
(2) get out a groove by special cut drill in the centre position of microcosmic visual suprasil sand mo(u)ld type 8 lower shoe, the length of groove is 8.0cm, and width is 1.5cm, and the degree of depth is 0.2cm;
(3) cut transparent plexiglass plate with special cutting tool, make microcosmic visual suprasil sand mo(u)ld type 8 upper cover plate, the length of cover plate is 10.0cm, and width is 4.5cm, and thickness is 0.5cm;
(4) respectively getting out a diameter with special screw thread drill bit (φ 6) in the centre position, two ends of microcosmic visual suprasil sand mo(u)ld type 8 upper cover plate is the threaded hole of 0.6cm, the distance of threaded hole distance right boundary is 1.8cm, threaded hole, as the entrance and exit of fluid, is linked in experiment flow by plastic whorl joint;
(5) upper cover plate of visual for microcosmic suprasil sand mo(u)ld type 8 and lower shoe are stacked together, and by clamp, then use special screw thread drill bit (φ 2) to get out the threaded hole that 14 diameters are 0.2cm on the upper cover plate and lower shoe of microcosmic visual suprasil sand mo(u)ld type 8;
(6) by 14 iron screws, the upper cover plate of visual for microcosmic suprasil sand mo(u)ld type 8 and lower shoe are fixed, be the soft washer sealing of 0.1cm by thickness between the upper cover plate of microcosmic visual suprasil sand mo(u)ld type 8 and lower shoe, forming length between the upper cover plate of microcosmic visual suprasil sand mo(u)ld type 8 and lower shoe is 8.0cm, width is 1.5cm, the degree of depth is the space of 0.3cm, as the space of filling suprasil sand;
(7) with the outlet on plastics screw shutoff microcosmic visual suprasil sand mo(u)ld type 8 upper cover plate, then from entrance toward filling suprasil sand the space that the upper cover plate of microcosmic visual suprasil sand mo(u)ld type 8 and lower shoe are formed, suprasil sand is prepared by the sub-sieve of different meshes, the particle size range of suprasil sand is 100 ~ 500 μm, in stowing operation, beat model gently, guarantee that suprasil sandfilling is closely knit, even.
Apparatus of the present invention operationally, first simulated formation water, simulated oil and pore scale elastic microsphere suspending liquid are placed in the first intermediate receptacle 4, second intermediate receptacle 5, the 3rd intermediate receptacle 6 respectively, and thermostatic circulation bath 19 temperature is set, after temperature stabilization, setting micro pump 1 flow, carries out pore scale elastic microsphere microcosmic migration experiment and the experiment of pore scale elastic microsphere microcosmic oil drive.Pore scale elastic microsphere suspending liquid is injected in microcosmic visual suprasil sand mo(u)ld type 8, by video recording and the camera function of 3 D video microscope 14, Real Time Observation and gather pore scale elastic microsphere migration process and distribution image and remaining oil distribution image; By the measurement function of 3 D video microscope 14, the distribution image of quantitative test pore scale elastic microsphere and remaining oil distribution image; By pressure transducer 7, measure the Changing Pattern of injection pressure in the migration of pore scale elastic microsphere and oil displacement process in real time; Be separated by the sampling cup 21 in sampler 9 and measure produced fluid, calculating the Changing Pattern of water percentage, oil offtake, and utilize the output concentration of spectrophotometric determination pore scale elastic microsphere.By the method that microexamination and quantitative test combine, the migration mechanism of research pore scale elastic microsphere and raising recovery mechanism.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (1)
1. the pore-level analogue experiment installation of pore scale elastic microsphere migration in a porous medium, it is characterized in that: comprise micro pump, first intermediate receptacle, second intermediate receptacle, 3rd intermediate receptacle, pressure transducer, microcosmic visual suprasil sand mo(u)ld type, sampler, vacuum pump, bubble tower and computing machine, described micro pump is provided with pipeline and valve respectively with the first intermediate receptacle, second intermediate receptacle, one end of 3rd intermediate receptacle is connected, first intermediate receptacle, second intermediate receptacle, the other end of the 3rd intermediate receptacle is by same pipeline Bonding pressure sensor successively, microcosmic visual suprasil sand mo(u)ld type, sampler, sampler connects vacuum pump and bubble tower respectively by three-way connection, described pressure transducer is connected with computing machine by the first data line, the top of described microcosmic visual suprasil sand mo(u)ld type is provided with 3 D video microscope, described 3 D video microscope is provided with the second data line and is connected with computing machine, be provided with hot water circulation heated device below described microcosmic visual suprasil sand mo(u)ld type, described hot water circulation heated device be provided with water inlet pipe and be connected with thermostatic circulation bath with rising pipe, in described sampler, be placed with sampling cup, the adjustable extent of described micro pump flow velocity is 0.001 ~ 1200mL/h, described first intermediate receptacle, the second intermediate receptacle, the 3rd intermediate receptacle deposit simulated formation water, simulated oil and pore scale elastic microsphere suspending liquid respectively, the measuring accuracy of described pressure transducer is 0.001kPa, and frequency acquisition is 5 times/s, described 3 D video microscope is supporting image acquisition analysis software, carry out recording a video and taking pictures, video recording speed limit is 360 frames/s, the camera function pixel upper limit is 1,600 ten thousand, Measurement accuracy can be carried out to length and width, diameter, angle, area parameters, measurement of length precision is 0.001 μm, the measuring accuracy of angle is 0.001 degree, the temperature of adjustment thermostatic circulation bath, can control the temperature of fluid in microcosmic visual suprasil sand mo(u)ld type, described sampling cup for separating of with metering produced fluid, described vacuum pump is used for vacuumizing saturation simulation local water to microcosmic visual suprasil sand mo(u)ld type, liquid in described bubble tower is deionized water, described microcosmic visual suprasil sand mo(u)ld type adopts transparent organic glass processing, and filling suprasil sand is made, and the making step of microcosmic visual suprasil sand mo(u)ld type is specific as follows:
(1) cut transparent plexiglass plate with special cutting tool, make microcosmic visual suprasil sand mo(u)ld type lower shoe;
(2) groove is got out by special cut drill in the centre position of microcosmic visual suprasil sand mo(u)ld type lower shoe;
(3) cut transparent plexiglass plate with special cutting tool, make microcosmic visual suprasil sand mo(u)ld type upper cover plate;
(4) respectively get out the threaded hole of certain internal diameter in the centre position, two ends of microcosmic visual suprasil sand mo(u)ld type upper cover plate with special screw thread drill bit, threaded hole, as the entrance and exit of fluid, is linked in experiment flow by plastic whorl joint;
(5) upper cover plate of visual for microcosmic suprasil sand mo(u)ld type and lower shoe are stacked together, and by clamp, on the upper cover plate and lower shoe of microcosmic visual suprasil sand mo(u)ld type, then get out the threaded hole of the certain internal diameter of some with special screw thread drill bit;
(6) by iron screw, the upper cover plate of visual for microcosmic suprasil sand mo(u)ld type and lower shoe are fixed, sealed by soft washer between the upper cover plate of microcosmic visual suprasil sand mo(u)ld type and lower shoe, the space formed between the upper cover plate of microcosmic visual suprasil sand mo(u)ld type and lower shoe, as the space of filling suprasil sand;
(7) with the outlet on plastics screw shutoff microcosmic visual suprasil sand mo(u)ld type upper cover plate, then from entrance toward filling suprasil sand the space that the upper cover plate of microcosmic visual suprasil sand mo(u)ld type and lower shoe are formed, suprasil sand is prepared by the sub-sieve of different meshes, in stowing operation, beat model gently, guarantee that suprasil sandfilling is closely knit, even.
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| CN202181891U (en) * | 2011-08-12 | 2012-04-04 | 东北石油大学 | Oil displacement experiment research device for visualized simulation |
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