CN103470238A - Holding device and rock core sleeve - Google Patents
Holding device and rock core sleeve Download PDFInfo
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- CN103470238A CN103470238A CN2013104084251A CN201310408425A CN103470238A CN 103470238 A CN103470238 A CN 103470238A CN 2013104084251 A CN2013104084251 A CN 2013104084251A CN 201310408425 A CN201310408425 A CN 201310408425A CN 103470238 A CN103470238 A CN 103470238A
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Abstract
The invention provides a holding device and a rock core sleeve. The holding device is used for holding a rock core and comprises a confining pressure barrel with a confining pressure cavity and the rock core sleeve installed in the confining pressure cavity and used for accommodating the rock core. The rock core sleeve is provided with the first end and the second end which are opposite. A first plug is arranged at the first end, a second plug is arranged at the second end, and the rock core is arranged between the first plug and the second plug. An emitting coil is arranged on the first plug, and a first receiving coil is arranged on the second plug. The holding device can be electrified by using an alternating current power supply, and an alternating electromagnetic field is formed by the emitting coil in the holding device, so that the holding device can be consistent with field operation, and errors are avoided.
Description
Technical field
The present invention relates to the energy minerals field, particularly a kind of clamping device.
The present invention relates to the energy minerals field, particularly a kind of rock core sleeve.
Background technology
In the energy minerals field, recovery ratio is the ratio number that the oil amount of energy extraction from oil reservoir takes up an area the matter reserves, and it is for weighing important indicator of energy minerals development level height.The height of recovery ratio is relevant with many factors, and not only with reservoir lithology, physical property, non-homogeneity, fluid properties and drive the natural conditions such as type relevant, and the development plan adopted when developing oil fields is relevant.
Existing development plan adopts the mode that applies electric field to stratum to improve recovery ratio more.Before developing oil fields, can simulate the impact applied after electric field recovery ratio by core experiment.In the core experiment process, adopt at present electrode normal direction rock core to apply electric field, apply DC electric field by electrode to rock core, and at the scene during operation, adopt coil method to apply alternating electromagnetic field to stratum, due to the electric field difference applied, there is some difference to cause the conclusion of laboratory simulation and real production operation, even causes the reduction of recovery ratio.More accurate for the conclusion of core experiment, need to apply alternating electromagnetic field with the simulated field operation to rock core, yet the clamping device that existing core experiment is used is for applying the DC electric field design, it can't meet the needs that apply alternating electromagnetic field.
Summary of the invention
In view of this, the invention provides in a kind of core experiment process the clamping device of alternating electromagnetic field can be provided to rock core.
The invention provides a kind of clamping device, for clamping rock core, described clamping device comprises: the confined pressure cylinder with confined pressure chamber; Be installed in described confined pressure chamber and, for accommodating the rock core sleeve of described rock core, described rock core sleeve has relative first end and the second end; Described first end is equipped with the first plug, and described the second end is equipped with the second plug, and described rock core is between described the first plug and described the second plug; Be provided with transmitting coil on described the first plug; Be provided with the first receiving coil on described the second plug.
Preferably, on described the first plug, also be provided with the second receiving coil, the more described transmitting coil of described the second receiving coil approaches described the second plug.
Preferably, described the first plug has the first plug inner face in the face of described the second plug, described the first plug inner face is recessed to form for accommodating the first host cavity of described transmitting coil towards the direction away from described the second plug, described the second plug has the second plug inner face in the face of described the first plug, and described the second plug inner face is recessed to form for accommodating the second host cavity of described the first receiving coil towards the direction away from described the first plug.
Preferably, described the first host cavity and described the second host cavity seal respectively.
Preferably, in described the first host cavity, be provided with the First Line loop pillar, described transmitting coil is set on described First Line loop pillar, in described the second host cavity, is provided with the second coil column, and described the first receiving coil is set on described the second coil column.
Preferably, on described First Line loop pillar, be arranged with the first sealing ring, by described First Line loop pillar, described the first sealing ring and described the first host cavity, described transmitting coil sealed; Be arranged with the second sealing ring on described the second coil column, by described the second coil column, described the second sealing ring and described the second host cavity, described the first receiving coil sealed.
Preferably, to pass into the frequency of alternating current be 2 megahertzes to described transmitting coil.
Preferably, the length of described the first plug and described the second plug is more than 0.1 meter.
Preferably, the internal diameter of described confined pressure cylinder is more than 0.2 meter.
The present invention also provides a kind of rock core sleeve, and described rock core sleeve has relative first end and the second end; Described first end is equipped with the first plug, and described the second end is equipped with the second plug; Be provided with transmitting coil on described the first plug; Be provided with receiving coil on described the second plug.
The described clamping device that embodiment of the present invention provides, by transmitting coil has been installed to form electric field in inside, and by being set, receiving coil responds to the electric field formation induced electromotive force that described transmitting coil produces, the basis of the structure of establishing for the subsequent experimental data analysis, further, described clamping device can pass into AC power, and section forms alternating electromagnetic field by described transmitting coil within it, like this and field operation is consistent, and avoids producing error.
The accompanying drawing explanation
Fig. 1 is the formal figure of the clamping device that provides of embodiment of the present invention;
Fig. 2 is the sectional view of clamping device described in Fig. 1 along hatching line A-A;
Fig. 3 is the partial enlarged drawing of clamping device described in Fig. 2.
The specific embodiment
See also Fig. 1, Fig. 2 and Fig. 3, the clamping device 100 that embodiment of the present invention provides is for clamping rock core 10, described clamping device 100 comprises: the confined pressure cylinder 12 with confined pressure chamber 14, be arranged on the rock core sleeve 16 in described confined pressure cylinder 12, be arranged on transmitting coil 18 and the first receiving coil 20 in described rock core sleeve 16.Described rock core 10 can be housed in described rock core sleeve 16, and, between described transmitting coil 18 and described the first receiving coil 20, can apply electric field to described rock core 10 by described transmitting coil 18 and described the first receiving coil 20.
Described confined pressure cylinder 12 is for accommodating and install described rock core sleeve 16, and by described confined pressure chamber 14 interior filling liquids, to rock core sleeve 16, to apply circumferential pressure, to realize the pressure state of the described rock core 10 of simulation when underground.In the present embodiment, described confined pressure cylinder 12 is made by stainless steel material, makes it have mechanical strength and corrosion resistance preferably.
Described rock core sleeve 16 is accommodated and is arranged in described confined pressure chamber 14, and described rock core 10 is accommodated in described rock core sleeve 16 inside.Described rock core sleeve 16 adopts flexible materials to make, and after the pressure that is subject to described confined pressure chamber 14 interior liquid, described pressure can be passed to described rock core 10, realizes the circumferential pressure state when the nature state to described rock core 10 simulations.In the present embodiment, the material of described rock core sleeve 16 is rubber, having preferably outside force transfering characteristic, also has corrosion resistance preferably, because rubber is insulation materials, makes described rock core sleeve 16 have safety preferably.
Described rock core sleeve 16 has relative first end 22 and the second end 24.At described first end 22, the first plug 26 is installed, described the second end 24 is equipped with the second plug 28, and described rock core 10 is between described the first plug 26 and described the second plug 28.Described the first plug 24 and described the second plug 28 can be accepted outside applied pressures and also pass to described rock core 10, with the longitudinal pressure when the nature state to described rock core 10 simulations.So, by described rock core 10, applying circumferential pressure and longitudinal pressure, realize that the described rock core 10 of simulation is in natural state, and then created environmental basis for further carrying out experiment test.
The material of described the first plug 26 and described the second plug 28 has corrosion resistance and mechanical strength preferably.The material of the two is insulation materials, is exemplified as resin, rubber, plastics or plastic-steel.In the present embodiment, described the first plug 26 and described the second plug 28 adopt plastics to make.
Described transmitting coil 18 is arranged on described the first plug 26, and when described transmitting coil 18 is connected external power source, it can produce electric field.Be not electrically connected between described transmitting coil 18 and described rock core 10, thereby avoid described rock core 10 direct-electrifyings to produce electrolysis or the disturbing effect such as electric osmose.Described external power source is AC power, makes described transmitting coil 18 can produce alternating electromagnetic field.
Described the first receiving coil 20 is arranged on described the second plug 28, described the first receiving coil 20 can receive the electric field that described transmitting coil 18 sends, form the first induced electromotive force, the researcher can, by the power of described the first induced electromotive force of research, further calculate resistivity and other characteristic of described rock core 10.Be not electrically connected between described the first receiving coil 20 and described rock core 10, avoid when electric leakage appears in described transmitting coil 18, between described transmitting coil 18 and described the first receiving coil 20 by described rock core 10 conductings.
In an embodiment of the invention, on described the first plug 26, also be provided with the second receiving coil 30, the more described transmitting coil 18 of described the second receiving coil 30 approaches described the second plug 28.Described the second receiving coil 30 can receive the electric field that described transmitting coil 18 produces, and forms the second induced electromotive force.The researcher can make ratio or do the computings such as phase difference by described the first induced electromotive force and described the second induced electromotive force, further calculates the resistivity of described rock core 10.The external power source connected due to described transmitting coil 18 is alternating current, the electric field of its generation is alternating electromagnetic field, under the impact of described alternating electromagnetic field, the electronics that adopts the described confined pressure cylinder 12 that stainless steel material makes moves along with described alternating electromagnetic field and has produced eddy current effect, when described the second receiving coil 30 not being set, described the first induced electromotive force that only depends on described the first receiving coil 20 inductions of research to form calculates the resistivity of described rock core 10, can be subject to the impact of described eddy current effect.In present embodiment, by described the second receiving coil 30 and the common described alternating electromagnetic field that receives described transmitting coil 18 generations of described the first receiving coil 20 are set, can be further by described the first induced electromotive force and described the second induced electromotive force be made to ratio or phase difference, can eliminate greatly the impact of the described eddy current effect of described confined pressure cylinder 12 on experimental result, further improve the precision of testing the data that record.
Certainly; the position of described the second receiving coil 30 is not limited to the description in present embodiment; under the enlightenment of the technology of the present invention marrow; it can also be arranged on other position such as being arranged on described the second plug; as long as its function and effect and the present invention are same or similar, all should be covered by protection domain of the present invention.
In an embodiment of the invention, described the first plug 26 has the first plug inner face 32 in the face of described the second plug 28, and described the first plug inner face 32 is recessed to form for accommodating the first host cavity 34 of described transmitting coil 18 towards the direction away from described the second plug 28.Described the second plug 28 has the second plug inner face 36 in the face of described the first plug 26, and described the second plug inner face 36 is recessed to form for accommodating the second host cavity 38 of described the first receiving coil 20 towards the direction away from described the first plug 26.So, accommodate described transmitting coil 18 by described the first host cavity 34, and described the second host cavity 38 is accommodated described the first receiving coil 20, avoided when described the first plug 26 and described the second plug 28 are exerted pressure to described rock core 10 respectively, damage described transmitting coil 18 and described the first receiving coil 20, further, spatially make between described transmitting coil 18 and described rock core 10 spaced apartly, avoid causing described rock core 10 charged when 18 electric leakage of described transmitting coil.
The second receiving coil 30 of aforementioned embodiments also can be set in the present embodiment, described the second receiving coil 30 can together be arranged in described the first host cavity 34 with described transmitting coil 18, also can together be arranged in described the second host cavity 38 with described the first receiving coil 20, preferably, described the second receiving coil 30 is arranged in described the first host cavity 34.
Due in the process of being tested, can inject by described clamping device 100 test liquid of test use to described rock core 10, contact described transmitting coil 18 and described the first receiving coil 20 for fear of described test liquid, by described transmitting coil 18 and described the first receiving coil 20 corrosion, described the first host cavity 34 and described the second host cavity 38 seal respectively, make described test liquid can't enter described the first host cavity 34 and described the second host cavity 38.
In the present embodiment, in described the first host cavity 34, be provided with First Line loop pillar 40, described transmitting coil 18 is set on described First Line loop pillar 40, so realizes that the position of described transmitting coil 18 is fixed.Further, described First Line loop pillar 40 adopts insulation materials to make, thereby avoids described transmitting coil 18 electric leakages to cause the other parts of described clamping device 100 charged.Be provided with the second coil column 42 in described the second host cavity 34, described the first receiving coil 20 is set on described the second coil column 42, so realizes that the position of described the first receiving coil 20 is fixed.When in present embodiment, being provided with described the second receiving coil 30, described the second receiving coil 30 can be set on described First Line loop pillar 40, or also can be set on described the second coil column 42.For described the first host cavity 34 and described the second host cavity 38 are sealed, be arranged with the first sealing ring 44 on described First Line loop pillar 40, sidewall by described First Line loop pillar 40, described the first sealing ring 44 and described the first host cavity 34 seals described transmitting coil, prevents that described test liquid from contacting with described transmitting coil 18.Be arranged with the second sealing ring 46 on described the second coil column 42, sidewall by described the second coil column 42, described the second sealing ring 46 and described the second host cavity 38 is sealed described the first receiving coil 20, prevent that described test liquid from contacting with described the first receiving coil 20, and corrode described the first receiving coil 20.Certainly; under the enlightenment of the technology of the present invention marrow; those skilled in the art may be changed for fixed form and the sealing means of described transmitting coil 18 and described the first receiving coil 20; but, as long as the function of its realization and the effect reached and the present invention are same or similar, all should be covered by protection domain of the present invention.
In an embodiment of the invention, the frequency of the alternating current that described transmitting coil 18 passes into is 2 megahertzes, and the frequency of this alternating current is identical with the frequency of exploration field by using, so can realize that the data of experimental simulation are more accurate.
The eddy current effect produced in order to reduce described confined pressure cylinder 12, the length of described the first plug 26 and described the second plug 28 is more than 0.1 meter, the internal diameter of described confined pressure cylinder 12 is more than 0.2 meter.In the present embodiment, it is 0.1 meter that the length of described the first plug 26 and described the second plug 28 is divided into, and the internal diameter of described confined pressure cylinder 12 is 0.2 meter.
In an embodiment of the invention, described confined pressure cylinder 12 is divided into cover 48 and cylindrical shell 50.Described cylindrical shell 50 has openend 52 and blind end 54.Described cover 48 is threaded mutually with the openend 52 of described cylindrical shell 50.Described rock core sleeve 16 is from the described openend 52 described confined pressure chamber 14 of packing into.
Be provided with the first through hole 54 in the center of described cover 48, in described the first through hole 54, be provided with the first securing member 56.Described the first securing member 56 is threaded mutually with described the first through hole 54, for exerting pressure to described the first plug 26, and by described the first plug 26, described pressure is passed to described rock core 10.Center at the blind end 54 of described cylindrical shell 50 is provided with the second through hole 58, in described the second through hole 58, is provided with the second securing member 60.Described the second securing member 60 is threaded mutually with described the second through hole 58, for exerting pressure to described the second plug 28, and by described the second plug 28, described pressure is passed to described rock core 10.Apply rightabout pressure by described the first plug 26 and described the second plug 28 to described rock core 10, realize the pressure state of described rock core 10 simulations in bottom is conducive to improve the accuracy of experimental data.
In the process of carrying out core experiment, need to inject test liquid to described rock core 10, injection for the ease of described test liquid, the center of described the first plug 26 is provided with injection hole 62, and the central area of the corresponding described rock core 10 of described injection hole 62, so can allow described test liquid flow into described rock core 10 and can more be evenly distributed on described rock core 10 everywhere.Further, be connected to inject described test liquid with external equipment for the ease of described injection hole 62, described the first securing member 56 is the cylindric of hollow, described the first plug 26 is back to the central area on the surface of described the second plug 28 towards the direction projection away from described the second plug 28, and extend along the inwall of described the first securing member 56, form the first extension 64, described injection hole 62 is positioned at the center of described the first extension 64, and connect whole described the first plug 26, setting like this is convenient to outside equipment and is connected to inject described test liquid with described injection hole 62.For the ease of the outflow of described test liquid, the center of described the second plug 28 is provided with tap hole 66, and the central area of the corresponding described rock core 10 of described tap hole 66, so can allow described test liquid flow out more uniformly described rock core 10.Further, be connected to reclaim described test liquid with external equipment for the ease of described tap hole 66, described the second securing member 60 is the cylindric of hollow, described the second plug 28 is back to the central area on the surface of described the first plug 26 towards the direction projection away from described the first plug 26, and extend along the inwall of described the second securing member 60, and form the second extension 68, described tap hole 66 is the center with described the second extension 68, and run through whole described the second plug 28, so setting can so that described tap hole 66 with external equipment, be connected.
Corresponding to aforementioned embodiments, while on described the first plug 26, being provided with described First Line loop pillar 40, described injection hole 62 runs through described the first plug 26 and described First Line loop pillar 40, and the described injection hole 62 that the described test liquid so injected can form via described the first plug 26 and described First Line loop pillar 40 enters described rock core 10.While on described the second plug 28, being provided with described the second coil column 42, described tap hole 66 runs through described the second plug 28 and described the second coil column 42, and the tap hole 66 that said test liquid can form via described the second coil column 42 and described the second plug 28 flows out described rock core 10.
Certainly, the structure of described the first securing member 56 and described the first plug 26 is not limited to the description in present embodiment, the two design in conjunction with described injection hole 62 can also have other design scheme, as as described in injection hole 62 run through as described in the first securing member 56 and as described in the first plug 26, just so without described the first extension 64.Those skilled in the art, under technology enlightenment of the present invention, also may make other change, but, as long as its function and effect and the present invention are same or similar, all should be covered by protection domain of the present invention.Same described the second securing member 60 and described the second plug 28 also can have the same technology alteration, at this, are not described in detail as space is limited.
Be provided with confined pressure chamber opening 70 on described cylindrical shell 50, for being connected with external equipment to described confined pressure chamber 14 interior filling liquids, described liquid can apply circumferential pressure to described rock core sleeve 16, realizes described rock core 10 is applied to circumferential pressure.In the present embodiment, described confined pressure chamber opening 70 is arranged on the sidewall of described cylindrical shell 50.Certainly; the position of described confined pressure chamber opening 70 is not limited to the sidewall of described cylindrical shell 50; as long as it can also be arranged on, and described cover 48 is first-class, and those skilled in the art also may make other change, when its function and effect and the present invention is same or similar all should be covered by protection domain of the present invention.
The described clamping device that embodiment of the present invention provides, by transmitting coil has been installed to form electric field in inside, and by being set, receiving coil responds to the electric field formation induced electromotive force that described transmitting coil produces, the basis of the structure of establishing for the subsequent experimental data analysis, further, described clamping device can pass into AC power, and section forms alternating electromagnetic field by described transmitting coil within it, like this and field operation is consistent, and avoids producing error.
Under technical spirit enlightenment of the present invention; those skilled in the art do not need to carry out creative work and just can further revise the structure of described clamping device 100; yet, as long as the function of its realization and effect and the present invention are same or similar, all should be covered by protection domain of the present invention.
Claims (10)
1. a clamping device, for clamping rock core, is characterized in that, described clamping device comprises:
Confined pressure cylinder with confined pressure chamber;
Be installed in described confined pressure chamber and, for accommodating the rock core sleeve of described rock core, described rock core sleeve has relative first end and the second end;
Described first end is equipped with the first plug, and described the second end is equipped with the second plug, and described rock core is between described the first plug and described the second plug;
Be provided with transmitting coil on described the first plug;
Be provided with the first receiving coil on described the second plug.
2. clamping device as claimed in claim 1, it is characterized in that: also be provided with the second receiving coil on described the first plug, the more described transmitting coil of described the second receiving coil approaches described the second plug.
3. clamping device as claimed in claim 1, it is characterized in that: described the first plug has the first plug inner face in the face of described the second plug, described the first plug inner face is recessed to form for accommodating the first host cavity of described transmitting coil towards the direction away from described the second plug, described the second plug has the second plug inner face in the face of described the first plug, and described the second plug inner face is recessed to form for accommodating the second host cavity of described the first receiving coil towards the direction away from described the first plug.
4. clamping device as claimed in claim 3, it is characterized in that: described the first host cavity and described the second host cavity seal respectively.
5. clamping device as claimed in claim 4, it is characterized in that: in described the first host cavity, be provided with the First Line loop pillar, described transmitting coil is set on described First Line loop pillar, be provided with the second coil column in described the second host cavity, described the first receiving coil is set on described the second coil column.
6. clamping device as claimed in claim 5, is characterized in that: be arranged with the first sealing ring on described First Line loop pillar, by described First Line loop pillar, described the first sealing ring and described the first host cavity, described transmitting coil sealed; Be arranged with the second sealing ring on described the second coil column, by described the second coil column, described the second sealing ring and described the second host cavity, described the first receiving coil sealed.
7. clamping device as claimed in claim 1, it is characterized in that: the frequency that described transmitting coil passes into alternating current is 2 megahertzes.
8. clamping device as claimed in claim 7, it is characterized in that: the length of described the first plug and described the second plug is more than 0.1 meter.
9. clamping device as claimed in claim 7, it is characterized in that: the internal diameter of described confined pressure cylinder is more than 0.2 meter.
10. a rock core sleeve, it is characterized in that: described rock core sleeve has relative first end and the second end;
Described first end is equipped with the first plug, and described the second end is equipped with the second plug;
Be provided with transmitting coil on described the first plug;
Be provided with receiving coil on described the second plug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408425.1A CN103470238B (en) | 2013-09-10 | 2013-09-10 | Clamping device and rock core sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310408425.1A CN103470238B (en) | 2013-09-10 | 2013-09-10 | Clamping device and rock core sleeve |
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| Publication Number | Publication Date |
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| CN103470238A true CN103470238A (en) | 2013-12-25 |
| CN103470238B CN103470238B (en) | 2016-02-03 |
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| CN201310408425.1A Active CN103470238B (en) | 2013-09-10 | 2013-09-10 | Clamping device and rock core sleeve |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566990A (en) * | 2003-07-03 | 2005-01-19 | 石油大学(北京) | Method and apparatus for measuring characteristic for fluid in downhole well casing based on nuclear magnetic resonance |
| CN202066777U (en) * | 2011-04-21 | 2011-12-07 | 中国石油天然气股份有限公司 | Multifunctional core clamp holder |
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| CN102507626A (en) * | 2011-10-10 | 2012-06-20 | 北京大学 | Rock core holder compatible with nuclear magnetic resonance |
| CN103234888A (en) * | 2013-04-17 | 2013-08-07 | 中国石油天然气股份有限公司 | Long rock core holder |
-
2013
- 2013-09-10 CN CN201310408425.1A patent/CN103470238B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1566990A (en) * | 2003-07-03 | 2005-01-19 | 石油大学(北京) | Method and apparatus for measuring characteristic for fluid in downhole well casing based on nuclear magnetic resonance |
| CN202066777U (en) * | 2011-04-21 | 2011-12-07 | 中国石油天然气股份有限公司 | Multifunctional core clamp holder |
| CN102288629A (en) * | 2011-07-01 | 2011-12-21 | 中联煤层气国家工程研究中心有限责任公司 | Core holder |
| CN102507626A (en) * | 2011-10-10 | 2012-06-20 | 北京大学 | Rock core holder compatible with nuclear magnetic resonance |
| CN103234888A (en) * | 2013-04-17 | 2013-08-07 | 中国石油天然气股份有限公司 | Long rock core holder |
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| CN103470238B (en) | 2016-02-03 |
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