CN203321470U - CT scanning system based on top gas injection multi-angle displacement process - Google Patents

CT scanning system based on top gas injection multi-angle displacement process Download PDF

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Publication number
CN203321470U
CN203321470U CN2013202669853U CN201320266985U CN203321470U CN 203321470 U CN203321470 U CN 203321470U CN 2013202669853 U CN2013202669853 U CN 2013202669853U CN 201320266985 U CN201320266985 U CN 201320266985U CN 203321470 U CN203321470 U CN 203321470U
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China
Prior art keywords
gas injection
rock core
displacement
end support
system based
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Withdrawn - After Issue
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CN2013202669853U
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Chinese (zh)
Inventor
李彤
吕伟峰
刘庆杰
马德胜
冷振鹏
严守国
张祖波
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Petrochina Co Ltd
China Petroleum and Natural Gas Co Ltd
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China Petroleum and Natural Gas Co Ltd
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Priority to CN2013202669853U priority Critical patent/CN203321470U/en
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Abstract

The utility model discloses a CT scanning system based on a top gas injection multi-angle displacement process. The CT scanning system comprises a CT scanning system body, a displacement system, a covering and pressing system, a pressure measurement system, a heterogeneous multilayer core holding unit used for CT scanning and a metering system. The core holding unit used for CT scanning can be adjusted to any direction between the horizontal direction and the vertical direction and can be fixed, a rotary system is introduced so that the influence of reservoir dip angles can also be studied, and an existing CT scanner can be matched maximally to carry out top vertical gas injection experiments.

Description

CT scan system based on the displacement of crestal gas injection multi-angle
Technical field
The utility model relates to a kind of simulation oil field and closes notes Mining Test device, is specifically related to a kind of CT scan system based on the displacement of crestal gas injection multi-angle.
Background technology
The CT technical development is very fast, as measuring technology conventional in core analysis, the aspects such as the non-homogeneity that is widely used in core description, rock core is measured, the core sample handling procedure is determined, the measurement of crack quantitative analysis, online saturation ratio, flowing experiment research.By physical properties of rock being carried out quantitatively and graphical analysis, intuitively characterize pore structure, non-homogeneity, the remaining oil distribution of rock; Displacement process is carried out to visual research, understand deeply oil recovery mechanism, monitoring fluid dispersion and channelling characteristic, understanding polymer flooding to improving the sweep area impact, disclose formation damage mechanism etc.The saturation ratio of utilizing the CT technology can obtain the rock core internal flow, along the journey distributed intelligence, is utilized the CT technology more can obtain intuitively the fluid saturation distributed intelligence in each layer, and can further be studied the channelling phenomenon caused due to Action of Gravity Field.
After waterflooding extraction enters high water-cut stage, still have a large amount of remaining oils extraction to come.Adopt existing raising recovery ratio method often to exist poor for applicability, improve the recovery ratio amplitude limited, the problems such as high expensive.Abroad, the vertical gas injection in top has developed into a kind of low cost, efficient oil recovery technique, the pattern exploitation of usually taking at the scene top straight well gas injection bottom water horizontal well to recover the oil in practical application, and exploitation effect is very good.Grasp the vertical gas injection technology in top and improve the basis that recovery mechanism is this Technique Popularizing application and optimal design.Simultaneously, in the practical application link, the deep understanding that this technology is improved to recovery mechanism also contributes to the east China original oil zone to utilize this technological adjustment exploitation measure, improve development effectiveness has certain directive significance.
The current research about the vertical gas injection in top; the large-scale thing mould of full-hole core or the sand-filling tube models of adopting carry out experimental study more; the starting point of problem analysis is mainly to study the impact of injection rate on final effect by the pressure of monitoring experiment overall process and occurrence; seldom there is experiment the angle of its impact to be studied to the mechanism of this technology from Oil, Water, Gas three's distribution, migration and various factors, about the experimental design thinking of this respect also seldom.
The utility model, based on existing CT scan monitoring fluid saturation technology, is realized oil, gas, water three's distribution, migration in the experiment of monitoring crestal gas injection by the design specialized clamper.
The utility model content
The purpose of this utility model is to provide a kind of CT scan system based on the displacement of crestal gas injection multi-angle, this system vertically gas injection experiment is carried out horizontal sweep, realization utilizes in CT scan technical Analysis experiment the Oil, Water, Gas three to distribute migration rule and many factors to its impact, dissects the vertical gas injection technology in top from the angle than microcosmic and improves recovery mechanism.
For achieving the above object, the technical solution of the utility model is as follows:
A kind of CT scan system based on the displacement of crestal gas injection multi-angle, it comprises CT scan system, displacement system, covers pressing system, pressure-measuring system, for heterogeneous multi-layer core holding unit and the metering system of CT scan; Should be wherein to comprise the polyether-ether-ketone resin shell for the core holding unit of CT scan, rubber tube, the rock core top end, come directly towards under rock core, rock core model, inlet, liquid outlet, base, lower end support, upper end support and vertical support frame; Lower end support is connected the polyether-ether-ketone resin shell with upper end support with base, wherein, one end of described shell is connected with lower end support, and can be around lower end support rotation, described shell can turn to level, and the other end of described shell can be supported on described upper end support, one end of vertical support frame can rotate and be connected with base, the other end is fixedly connected with removedly with the polyether-ether-ketone resin shell, and described polyether-ether-ketone resin shell can be adjusted to any direction between horizontal and vertical and fix.
In a preferred embodiment of the present utility model, described core holding unit is provided with plumb line use level hornwork on the polyether-ether-ketone resin shell, for the angle of inclination to core holding unit, is measured.
In another preferred embodiment of the present utility model, on top, a plurality of liquid outlets are set under this rock core, the rock core liquid outlet is communicated with rock core room and metering system, and each liquid outlet is aimed at respectively one deck rock core model.
CT scan system based on the displacement of crestal gas injection multi-angle as above, wherein, this rubber tube outside is cube or cylinder, and inside has the cube cavity to hold cube rock core or cylindrical cavity to hold the cylinder rock core, and its two ends have circular interface.
CT scan system based on the displacement of crestal gas injection multi-angle as above, wherein, described rock core model is the single or multiple lift rock core.
CT scan system based on the displacement of crestal gas injection multi-angle as above, wherein, described individual layer rock core is cylindrical or cube.
In another preferred embodiment of the present utility model, described lower end support is connected with the polyether-ether-ketone resin shell by rotating shaft, and this rotating shaft is less than 1/2 of clamper length apart from the distance of base.
CT scan system based on the displacement of crestal gas injection multi-angle as above, wherein, the axis of rotation of described lower end support is less than 1/3 of clamper length apart from the distance of base.
CT scan system based on the displacement of crestal gas injection multi-angle as above, wherein, described upper end support and lower end support are made by rigid material.
The beneficial effects of the utility model are, the first, and in the CT scan process, metal material is very strong to the absorption of X ray, this will cause ray to be difficult to penetrate rock core, thereby cause serious measure error, the design adopts the peek material to make the clamper cylindrical shell, has reduced well the impact of this respect.The clamper of existing vertical gas injection rock core CT scan system is too high, enters the scanning area difficulty; On the other hand, scan slice thickness increases, and produces ray hardened meeting and causes very large measure error.The introducing of rotary system has overcome the inconvenience of CT scan in the experimentation well, and simultaneously, the introducing of rotary system also can, with the impact at Study In Reservoir inclination angle, be mated existing CT scanner and carry out the vertical gas injection experiment in top to greatest extent.
The accompanying drawing explanation
The following drawings only is intended to the utility model is done and schematically illustrated and explain, does not limit scope of the present utility model.Wherein,
Fig. 1 is the structural representation of the CT scan system based on the displacement of crestal gas injection multi-angle of the present utility model when the scanning sample introduction;
Fig. 2 is the structural representation of core holding unit of the present utility model when displacement test;
The structural representation that Fig. 3 is core holding unit;
Fig. 4 is that core holding unit is 45 ° of laying state structural representations;
The phantom drawing that Fig. 5 is rear end support.
The specific embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast accompanying drawing the specific embodiment of the present utility model is described.
The vertical stable displacement experiment of embodiment 1 crestal gas injection
First by rock core in clamper water drive to needed water saturation, then carry out crestal gas injection in the arrival end gas injection and vertically stablize the displacement of reservoir oil, and at the port of export, production fluid is measured, until reach experiment purpose, now the polyether-ether-ketone resin shell 8 of clamper is in vertical position and fixing by vertical support frame 12.
Regularly with CT scan, carry out the saturation ratio delta data in gatherer process in process.
During each scanning, first vertical support frame 12 and polyether-ether-ketone resin shell 8 are untied, and vertical support frame is turned to and lies on base, the clamper of vertically putting is transferred to level fixing by lower end support 3 and upper end support 4 in the situation that does not change other state, then in the CT scan zone, scanned, then again clamper is held up to vertical and fixing by vertical support frame 12, this scanning process finishes, and carries out CT scan by scanning system of the present utility model and can avoid the impact of gravity for the inside result of every one deck.
Embodiment 2 is for the CT scan multilayer non-homogeneous model experimental system of formation condition simulation
As shown in Figure 1, multilayer non-homogeneous model pilot system comprises CT scan system 1, displacement system, covers pressing system, pressure-measuring system, metering system (detailed description of above-mentioned parts with reference to Chinese patent CN102095740B, notice of authorization day 2012.08.08) and core holding unit.
CT scan system (1) can be used conventional Medical CT scanning system, GE Light Speed8 multi-layer helical scanning system for example, and minimum scanning bed thickness 0.625mm, maximum scan voltage 140kV, the accuracy of measuring saturation ratio is 1%.
The displacement system is comprised of two high-pressure metering pumps, can carry two kinds of fluids simultaneously, is the power source of displacement.Flow rates: 0.001-15ml/min, maximum pressure: 10000psi (68.94MPa).
Cover pressing system and be comprised of pump, for example JB-800 pump group, add confined pressure for giving core holding unit and rock core, the simulation burden pressure.Maximum confined pressure 70MPa.
Pressure-measuring system is comprised of a plurality of pressure sensors, and two high-pressure transducer ranges are 70MPa, with the displacement pump, is connected, and also has in addition three low-pressure sensor, and for measuring the fluid mouth pressure, range is respectively 0.05MPa, 0.5MPa, 5MPa.Precision is 0.25%.
Cumulative oil production and cumulative liquid production when metering system records water breakthrough time, the water breakthrough of every layer.
Wherein, core holding unit is to be the custom-designed core holding unit for CT scan of the utility model pilot system, please refer to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, it comprises polyether-ether-ketone resin shell 8, rubber tube 9, rock core top end 10, come directly towards 6 under rock core, rock core model 7, inlet 11, liquid outlet 5, base 2, lower end support 3, upper end support 4 and vertical support frame 12, lower end support 3 is connected polyether-ether-ketone resin shell 8 with upper end support 4 with base, wherein, one end of shell 8 is connected with lower end support 3 by rotating shaft 31, and can be by this rotating shaft 31 around lower end support 3 rotations, when shell 8 turns to level, the other end of shell 8 can be supported on described upper end support 4, upper end support 4 is connected (as shown in Figure 2) with polyether-ether-ketone resin shell 8 for contact, one end of vertical support frame 12 can rotate and base 2 is connected, the other end can be fixed by removably with polyether-ether-ketone resin shell 8, it can be adjusted to polyether-ether-ketone resin shell 8 any direction between horizontal and vertical and fix.Concrete angle of inclination can be measured by the plumb line 14 use level hornworks 13 that are fixed on polyether-ether-ketone resin shell 8.It is a specific embodiment that clamper shown in Fig. 4 is 45 ° of laying states.
Wherein, under rock core, on top, a plurality of liquid outlets are set, the rock core liquid outlet is communicated with rock core room and metering system, and each liquid outlet 5 is aimed at respectively one deck rock core model.
In addition, in the utility model, rubber tube 9 outsides are cube or cylinder, and inside has the cube cavity to hold the cube rock core, or the inside of this rubber tube 9 forms cylindrical cavity to hold the cylinder rock core, and its two ends have circular interface.
In a feasible embodiment, described rock core model is the single or multiple lift rock core.Wherein, the individual layer rock core is cylindrical or cube.
A concrete technical scheme is that the rotating shaft 31 of lower end support 3 is less than 1/2 of clamper length apart from the distance of base 2, preferably is less than 1/3, thereby can effectively reduces scanning area and scanning bed distance, improves versatility and the compliance of scanning device.
Upper end support 4 of the present utility model and lower end support 3 are made by rigid material.
In addition, vertical support frame 12 is with the connected mode of shell 8 or to adopt conventional structure, as by shell 8, draw-in groove being set, or connector is set on shell 8 by connections such as pin, bolts, as long as can pass through the support of vertical support frame 12, make shell 8 remain on the upright or angle of inclination of regulation just passable, its concrete structure is not limited.And an end of this vertical support frame 12 can also be connected with upper end support 4 rotationally, as shown in Figure 4.
Please coordinate referring to Fig. 5, in a specific embodiment, lower end support 3 has the rack body 30 that can be fixedly connected with base 2, the clip 32 that can be fixedly connected with an end of shell 8, be connected by rotating shaft 31 between described clip 32 and rack body 30, thereby make the shell 8 can be with respect to lower end support 3 rotations by this rotating shaft 31.
The foregoing is only the schematic specific embodiment of the utility model, not in order to limit scope of the present utility model.Any those skilled in the art, the equivalent variations of doing under the prerequisite that does not break away from design of the present utility model and principle and modification, all should belong to the scope that the utility model is protected.And it should be noted that, each ingredient of the present utility model is not limited in above-mentioned overall applicability, each technical characterictic of describing in manual of the present utility model can select one to adopt separately or select the multinomial use that combines according to actual needs, therefore, the utility model has been contained other combination relevant with this case inventive point and concrete application in the nature of things.

Claims (9)

1. the CT scan system based on the displacement of crestal gas injection multi-angle, is characterized in that, this system comprises CT scan system, displacement system, covers pressing system, pressure-measuring system, for heterogeneous multi-layer core holding unit and the metering system of CT scan; Should be wherein to comprise polyether-ether-ketone resin shell (8) for the core holding unit of CT scan, rubber tube (9), rock core top end (10), top (6) under rock core, rock core model (7), inlet (11), liquid outlet (5), base (2), lower end support (3), upper end support (4) and vertical support frame (12); Lower end support (3) is connected polyether-ether-ketone resin shell (8) with upper end support (4) with base, wherein, one end of shell (8) is connected with lower end support (3), and can rotate around lower end support (3), described shell can turn to level, and the other end of described shell can be supported on described upper end support (4), one end of vertical support frame (12) can rotate and be connected with described base, the other end is fixedly connected with removedly with polyether-ether-ketone resin shell (8), and described polyether-ether-ketone resin shell (8) can be adjusted to any direction between horizontal and vertical and fix.
2. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 1, is characterized in that, described core holding unit is provided with plumb line use level hornwork on polyether-ether-ketone resin shell (8).
3. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 1, it is characterized in that, on top, a plurality of liquid outlets are set under this rock core, the rock core liquid outlet is communicated with rock core room and metering system, and each liquid outlet is aimed at respectively one deck rock core model.
4. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 1, it is characterized in that, this rubber tube (9) outside is cube or cylinder, inside has the cube cavity to hold cube rock core or cylindrical cavity to hold the cylinder rock core, and its two ends have circular interface.
5. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 1, is characterized in that, described rock core model is the single or multiple lift rock core.
6. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 5, is characterized in that, described individual layer rock core is cylindrical or cube.
7. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 1, it is characterized in that, described lower end support (3) is connected with polyether-ether-ketone resin shell (8) by rotating shaft (31), and this rotating shaft is less than 1/2 of clamper length apart from the distance of base (2).
8. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 7, is characterized in that, the axis of rotation (31) of described lower end support (3) is less than 1/3 of clamper length apart from the distance of base (2).
9. the CT scan system based on the displacement of crestal gas injection multi-angle according to claim 1, is characterized in that, described upper end support (4) and lower end support (3) are made by rigid material.
CN2013202669853U 2013-05-16 2013-05-16 CT scanning system based on top gas injection multi-angle displacement process Withdrawn - After Issue CN203321470U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103306651A (en) * 2013-05-16 2013-09-18 中国石油天然气股份有限公司 Multi-angle displacement CT scanning system based on top gas injection
CN109690311A (en) * 2016-08-09 2019-04-26 沙特阿拉伯石油公司 Multi-functional diplocardia displacement of reservoir oil device and method
CN109973086A (en) * 2019-02-25 2019-07-05 中国石油大学(北京) Simulate the experimental provision of remaining oil migration and aggregation
WO2021139065A1 (en) * 2020-01-10 2021-07-15 西南石油大学 Natural gas diffusion coefficient measuring auxiliary device based on hand-cranked lifting device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103306651A (en) * 2013-05-16 2013-09-18 中国石油天然气股份有限公司 Multi-angle displacement CT scanning system based on top gas injection
CN103306651B (en) * 2013-05-16 2016-03-09 中国石油天然气股份有限公司 Based on the CT scan system of crestal gas injection multi-angle displacement
CN109690311A (en) * 2016-08-09 2019-04-26 沙特阿拉伯石油公司 Multi-functional diplocardia displacement of reservoir oil device and method
CN109973086A (en) * 2019-02-25 2019-07-05 中国石油大学(北京) Simulate the experimental provision of remaining oil migration and aggregation
WO2021139065A1 (en) * 2020-01-10 2021-07-15 西南石油大学 Natural gas diffusion coefficient measuring auxiliary device based on hand-cranked lifting device

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AV01 Patent right actively abandoned

Granted publication date: 20131204

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C25 Abandonment of patent right or utility model to avoid double patenting