CN103470238B - Clamping device and rock core sleeve - Google Patents
Clamping device and rock core sleeve Download PDFInfo
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- CN103470238B CN103470238B CN201310408425.1A CN201310408425A CN103470238B CN 103470238 B CN103470238 B CN 103470238B CN 201310408425 A CN201310408425 A CN 201310408425A CN 103470238 B CN103470238 B CN 103470238B
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- rock core
- clamping device
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- transmitting coil
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Abstract
The invention provides a kind of clamping device and rock core sleeve.Described clamping device is for clamping rock core, and described clamping device comprises: the confined pressure cylinder with confined pressure chamber; To be installed in described confined pressure chamber and rock core sleeve for accommodating described rock core, described rock core sleeve has relative first end and the second end; Described first end is provided with the first plug, and described second end is provided with the second plug, and described rock core is between described first plug and described second plug; Described first plug is provided with transmitting coil; Described second plug is provided with the first receiving coil.Described clamping device can pass into AC power, forms alternating electromagnetic field therein by described transmitting coil, and like this and field operation is consistent, and avoids producing error.
Description
Technical field
The present invention relates to energy minerals field, particularly a kind of clamping device.
The present invention relates to energy minerals field, particularly a kind of rock core sleeve.
Background technology
In energy minerals field, recovery ratio the oil amount of extraction can account for the ratio number of oil in place from oil reservoir, and it be weigh an energy minerals development level important indicator just.The height of recovery ratio is relevant with many factors, not only with reservoir lithology, physical property, non-homogeneity, fluid properties and drive the natural conditions such as type relevant, and also relevant with the development plan adopted when developing oil fields.
The many employings of existing development plan apply mode from electric field to stratum improves recovery ratio.Before developing oil fields, can by the impact on recovery ratio after core experiment simulation applying electric field.In core experiment process, adopt electrode normal direction rock core to apply electric field at present, namely DC electric field is applied by electrode to rock core, and at the scene operation time, coil method is adopted to apply alternating electromagnetic field to stratum, because the electric field applied is different, there is some difference to cause the conclusion of laboratory simulation and real production operation, even causes the reduction of recovery ratio.In order to the conclusion of core experiment is more accurate, need to apply alternating electromagnetic field with simulated field operation to rock core, but the clamping device of existing core experiment is for the design of applying DC electric field, and it cannot meet the needs applying alternating electromagnetic field.
Summary of the invention
In view of this, the invention provides the clamping device that alternating electromagnetic field can be provided to rock core in a kind of core experiment process.
The invention provides a kind of clamping device, for clamping rock core, described clamping device comprises: the confined pressure cylinder with confined pressure chamber; To be installed in described confined pressure chamber and rock core sleeve for accommodating described rock core, described rock core sleeve has relative first end and the second end; Described first end is provided with the first plug, and described second end is provided with the second plug, and described rock core is between described first plug and described second plug; Described first plug is provided with transmitting coil; Described second plug is provided with the first receiving coil.
Preferably, described first plug is also provided with the second receiving coil, the more described transmitting coil of described second receiving coil is close to described second plug.
Preferably, described first plug has the first plug inner face in the face of described second plug, described first plug inner face is recessed to form the first host cavity for accommodating described transmitting coil towards the direction away from described second plug, described second plug has the second plug inner face in the face of described first plug, and described second plug inner face is recessed to form the second host cavity for accommodating described first receiving coil towards the direction away from described first plug.
Preferably, described first host cavity and described second host cavity seal respectively.
Preferably, be provided with First Line loop pillar in described first host cavity, described transmitting coil is set on described First Line loop pillar, is provided with the second coil column in described second host cavity, and described first receiving coil is set in described second coil column.
Preferably, described First Line loop pillar is arranged with the first sealing ring, by described First Line loop pillar, described first sealing ring and described first host cavity, described transmitting coil is sealed; Described second coil column is arranged with the second sealing ring, by described second coil column, described second sealing ring and described second host cavity to described first receiving coil sealing.
Preferably, described transmitting coil passes into the frequency of alternating current is 2 megahertzes.
Preferably, the length of described first plug and described 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 provided with the first plug, and described second end is provided with the second plug; Described first plug is provided with transmitting coil; Described second plug is provided with receiving coil.
The described clamping device that embodiment of the present invention provides, by having installed transmitting coil in inside to form electric field, and the electric field responding to the generation of described transmitting coil by arranging receiving coil forms induced electromotive force, for the basis of the structure that subsequent experimental data analysis is established, further, described clamping device can pass into AC power, forms alternating electromagnetic field therein by described transmitting coil, like this and field operation is consistent, and avoids producing error.
Accompanying drawing explanation
Fig. 1 is the formal figure of the clamping device that embodiment of the present invention provides;
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.
Detailed description of the invention
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 the transmitting coil 18 in described rock core sleeve 16 and the first receiving coil 20.Described rock core 10 can be housed in described rock core sleeve 16, and is between described transmitting coil 18 and described first receiving coil 20, can apply electric field by described transmitting coil 18 and described first receiving coil 20 to described rock core 10.
Described confined pressure cylinder 12 is for collecting and install described rock core sleeve 16, and by injection liquid described confined pressure chamber 14 in, to apply circumferential pressure to rock core sleeve 16, to realize simulating pressure state when described rock core 10 is in underground.In the present embodiment, described confined pressure cylinder 12 is made up of stainless steel material, makes it have good mechanical strength and corrosion resistance.
Described rock core sleeve 16 collecting is arranged in described confined pressure chamber 14, and the described rock core 10 of described rock core sleeve 16 inside collecting.Described rock core sleeve 16 adopts flexible material to make, and after the pressure being subject to liquid in described confined pressure chamber 14, described pressure can be passed to described rock core 10, realizes circumferential pressure state when being in nature state to the simulation of described rock core 10.In the present embodiment, the material of described rock core sleeve 16 is rubber, having outside good force transfering characteristic, also has good corrosion resistance, because rubber is insulation materials, makes described rock core sleeve 16 have good safety.
Described rock core sleeve 16 has relative first end 22 and the second end 24.Be provided with the first plug 26 at described first end 22, described second end 24 is provided with the second plug 28, and described rock core 10 is between described first plug 26 and described second plug 28.Described first plug 24 and described second plug 28 can accept outside applied pressure and pass to described rock core 10, to be in longitudinal pressure during nature state to described rock core 10 simulation.So by applying circumferential pressure and longitudinal pressure to described rock core 10, realizing the described rock core 10 of simulation and being in natural state, and then creating environmental basis for carrying out experiment test further.
The material of described first plug 26 and described second plug 28 has corrosion resistance and preferably mechanical strength.The material of the two is insulation materials, is exemplified as resin, rubber, plastics or plastic-steel.In the present embodiment, described first plug 26 and described second plug 28 are adopted made of plastic.
Described transmitting coil 18 is arranged on described first plug 26, and when described transmitting coil 18 connects external power source, it can produce electric field.Be not electrically connected between described transmitting coil 18 with described rock core 10, thus avoid described rock core 10 direct-electrifying to produce electrolysis or the disturbing effect such as electric osmose.Described external power source is AC power, makes described transmitting coil 18 to produce alternating electromagnetic field.
Described first receiving coil 20 is arranged on described second plug 28, described first receiving coil 20 can receive the electric field that described transmitting coil 18 sends, form the first induced electromotive force, researcher by the power of described first induced electromotive force of research, can calculate resistivity and other characteristic of described rock core 10 further.Described first receiving coil 20 is not electrically connected with between described rock core 10, avoids when electric leakage appears in described transmitting coil 18, by the conducting of described rock core 10 between described transmitting coil 18 and described first receiving coil 20.
In an embodiment of the invention, described first plug 26 is also provided with the second receiving coil 30, the more described transmitting coil of described second receiving coil 30 18 is close to described second plug 28.Described second receiving coil 30 can receive the electric field that described transmitting coil 18 produces, and forms the second induced electromotive force.Researcher can make ratio by described first induced electromotive force and described second induced electromotive force or do the computings such as phase difference, calculates the resistivity of described rock core 10 further.The external power source connected due to described transmitting coil 18 is alternating current, its electric field produced is alternating electromagnetic field, under the impact of described alternating electromagnetic field, the electronics of the described confined pressure cylinder 12 adopting stainless steel material to make moves along with described alternating electromagnetic field and creates eddy current effect, when not arranging described second receiving coil 30, only respond to by described first receiving coil 20 of research the resistivity that described first induced electromotive force formed calculates described rock core 10, the impact of described eddy current effect can be subject to.In present embodiment, by arranging the common described alternating electromagnetic field receiving described transmitting coil 18 and produce of described second receiving coil 30 and described first receiving coil 20, can further by described first induced electromotive force and described second induced electromotive force be made ratio or phase difference, the described eddy current effect can eliminating described confined pressure cylinder 12 greatly, on the impact of experimental result, further increases the precision of testing the data recorded.
Certainly; the position of described 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 and such as be arranged on described second plug; if its function and effect and the present invention same or similar, all should be covered by scope.
In an embodiment of the invention, described first plug 26 has the first plug inner face 32 in the face of described second plug 28, and described first plug inner face 32 is recessed to form the first host cavity 34 for accommodating described transmitting coil 18 towards the direction away from described second plug 28.Described second plug 28 has the second plug inner face 36 in the face of described first plug 26, and described second plug inner face 36 is recessed to form the second host cavity 38 for accommodating described first receiving coil 20 towards the direction away from described first plug 26.So, described transmitting coil 18 is accommodated by described first host cavity 34, and described second host cavity 38 accommodates described first receiving coil 20, avoid when described first plug 26 and described second plug 28 apply pressure respectively to described rock core 10, damage described transmitting coil 18 and described first receiving coil 20, further, spatially make between described transmitting coil 18 and described rock core 10 spaced apart, avoid causing when described transmitting coil 18 leaks electricity described rock core 10 charged.
Second receiving coil 30 of aforementioned embodiments also can be set in the present embodiment, described second receiving coil 30 together can be arranged in described first host cavity 34 with described transmitting coil 18, also together can be arranged in described second host cavity 38 with described first receiving coil 20, preferably, described second receiving coil 30 is arranged in described first host cavity 34.
Owing to carrying out in the process of testing, the test liquid of test can be injected to described rock core 10 by described clamping device 100, in order to avoid described test liquid contacts described transmitting coil 18 and described first receiving coil 20, described transmitting coil 18 and described first receiving coil 20 are corroded, described first host cavity 34 and described second host cavity 38 seal respectively, make described test liquid cannot enter described first host cavity 34 and described second host cavity 38.
In the present embodiment, in described 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, and the position so realizing described transmitting coil 18 is fixed.Further, described First Line loop pillar 40 adopts insulation materials to make, thus avoids the electric leakage of described transmitting coil 18 to cause the other parts of described clamping device 100 charged.In described second host cavity 34, be provided with the second coil column 42, described first receiving coil 20 is set in described second coil column 42, and the position so realizing described first receiving coil 20 is fixed.Corresponding to when being provided with described second receiving coil 30 in present embodiment, described second receiving coil 30 can be set on described First Line loop pillar 40, or also can be set in described second coil column 42.In order to seal described first host cavity 34 and described second host cavity 38, described First Line loop pillar 40 is arranged with the first sealing ring 44, sidewall by described First Line loop pillar 40, described first sealing ring 44 and described first host cavity 34 seals described transmitting coil, prevents described test liquid from contacting with described transmitting coil 18.Described second coil column 42 is arranged with the second sealing ring 46, sidewall by described second coil column 42, described second sealing ring 46 and described second host cavity 38 seals described first receiving coil 20, prevent described test liquid from contacting with described first receiving coil 20, and corrode described first receiving coil 20.Certainly; under the enlightenment of the technology of the present invention marrow; those skilled in the art may change for the fixed form of described transmitting coil 18 and described first receiving coil 20 and sealing means; as long as but its realize function and the effect reached and the present invention same or similar, all should be covered by scope.
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 on-the-spot frequency adopted of exploration, and the data that so can realize experimental simulation are more accurate.
In order to reduce the eddy current effect that described confined pressure cylinder 12 produces, the length of described first plug 26 and described second plug 28 is more than 0.1 meter, and 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 first plug 26 and described 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 loads described confined pressure chamber 14 from described openend 52.
The center of described cover 48 is provided with the first through hole 54, in described first through hole 54, is provided with the first securing member 56.Described first securing member 56 is threaded mutually with described first through hole 54, for applying pressure to described first plug 26, and by described first plug 26, described pressure is passed to described rock core 10.The center of the blind end 54 of described cylindrical shell 50 is provided with the second through hole 58, in described second through hole 58, is provided with the second securing member 60.Described second securing member 60 is threaded mutually with described second through hole 58, for applying pressure to described second plug 28, and by described second plug 28, described pressure is passed to described rock core 10.Apply rightabout pressure by described first plug 26 and described second plug 28 to described rock core 10, realize simulating to described rock core 10 pressure state be in bottom, be conducive to the accuracy improving experimental data.
In the process of carrying out core experiment, need to inject test liquid to described rock core 10, for the ease of the injection of described test liquid, the center of described 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, described test liquid so can be allowed to flow into described rock core 10 and more can 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, the cylindrical shape of described first securing member 56 in hollow, described first plug 26 is protruding towards the direction away from described second plug 28 back to the central area on the surface of described second plug 28, and extend along the inwall of described first securing member 56, form the first extension 64, described injection hole 62 is positioned at the center of described first extension 64, and through whole described first plug 26, setting like this is convenient to external 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 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, described test liquid so can be allowed to flow out described rock core 10 more uniformly.Further, be connected to reclaim described test liquid with external equipment for the ease of described tap hole 66, the cylindrical shape of described second securing member 60 in hollow, described second plug 28 is protruding towards the direction away from described first plug 26 back to the central area on the surface of described first plug 26, and extend along the inwall of described second securing member 60, and form the second extension 68, described tap hole 66 is the center with described second extension 68, and run through whole described second plug 28, so arranging can so that described tap hole 66 be connected with external equipment.
Corresponding to aforementioned embodiments, when described first plug 26 is provided with described First Line loop pillar 40, described injection hole 62 runs through described first plug 26 and described First Line loop pillar 40, and the described injection hole 62 that the described test liquid so injected can be formed via described first plug 26 and described First Line loop pillar 40 enters described rock core 10.When described second plug 28 is provided with described second coil column 42, described tap hole 66 runs through described second plug 28 and described second coil column 42, and the tap hole 66 that said test liquid can be formed via described second coil column 42 and described second plug 28 flows out described rock core 10.
Certainly, the structure of described first securing member 56 and described first plug 26 is not limited to the description in present embodiment, the two can also have other design scheme in conjunction with the design of described injection hole 62, 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, so just without the need to described first extension 64.Those skilled in the art, under technology of the present invention enlightenment, also may make other and change, as long as but its function and effect and the present invention same or similar, all should be covered by scope.Described equally the second securing member 60 and described second plug 28 also can have the same technology alteration, are not described in detail as space is limited at this.
Described cylindrical shell 50 being provided with confined pressure chamber opening 70, injecting liquid for being connected with external equipment in described confined pressure chamber 14, described liquid can apply circumferential pressure to described rock core sleeve 16, realizes applying circumferential pressure to described rock core 10.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; it is first-class that it can also be arranged on described cover 48, and those skilled in the art also may make other and change, as long as when its function and effect and the present invention is same or similar all should be covered by scope.
The described clamping device that embodiment of the present invention provides, by having installed transmitting coil in inside to form electric field, and the electric field responding to the generation of described transmitting coil by arranging receiving coil forms induced electromotive force, for the basis of the structure that subsequent experimental data analysis is established, further, described clamping device can pass into AC power, forms alternating electromagnetic field therein by described transmitting coil, 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 further can revise the structure of described clamping device 100; as long as but its realize function and effect and the present invention same or similar, all should be covered by scope.
Claims (10)
1. a clamping device, for clamping rock core, is characterized in that, described clamping device comprises:
There is the confined pressure cylinder in confined pressure chamber;
To be installed in described confined pressure chamber and rock core sleeve for accommodating described rock core, described rock core sleeve has relative first end and the second end;
Described first end is provided with the first plug, and described second end is provided with the second plug, and described rock core is between described first plug and described second plug;
Described first plug is provided with transmitting coil;
Described second plug is provided with the first receiving coil.
2. clamping device as claimed in claim 1, it is characterized in that: on described first plug, be also provided with the second receiving coil, the more described transmitting coil of described second receiving coil is close to described second plug.
3. clamping device as claimed in claim 1, it is characterized in that: described first plug has the first plug inner face in the face of described second plug, described first plug inner face is recessed to form the first host cavity for accommodating described transmitting coil towards the direction away from described second plug, described second plug has the second plug inner face in the face of described first plug, and described second plug inner face is recessed to form the second host cavity for accommodating described first receiving coil towards the direction away from described first plug.
4. clamping device as claimed in claim 3, is characterized in that: described first host cavity and described second host cavity seal respectively.
5. clamping device as claimed in claim 4, it is characterized in that: in described first host cavity, be provided with First Line loop pillar, described transmitting coil is set on described First Line loop pillar, be provided with the second coil column in described second host cavity, described first receiving coil is set in described second coil column.
6. clamping device as claimed in claim 5, is characterized in that: described First Line loop pillar is arranged with the first sealing ring, seals by described First Line loop pillar, described first sealing ring and described first host cavity to described transmitting coil; Described second coil column is arranged with the second sealing ring, by described second coil column, described second sealing ring and described second host cavity to described first receiving coil sealing.
7. clamping device as claimed in claim 1, 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, is characterized in that: the length of described first plug and described second plug is more than 0.1 meter.
9. clamping device as claimed in claim 7, is characterized in that: the internal diameter of described confined pressure cylinder is more than 0.2 meter.
10. a rock core sleeve, is characterized in that: described rock core sleeve has relative first end and the second end;
Described first end is provided with the first plug, and described second end is provided with the second plug;
Described first plug is provided with transmitting coil;
Described second plug is provided with receiving coil.
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 |
|---|---|
| CN103470238A CN103470238A (en) | 2013-12-25 |
| CN103470238B true 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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| CN103470238A (en) | 2013-12-25 |
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