CN2351551Y - High-resolution double-lateral log equipment electrode system - Google Patents
High-resolution double-lateral log equipment electrode system Download PDFInfo
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- CN2351551Y CN2351551Y CN98232431U CN98232431U CN2351551Y CN 2351551 Y CN2351551 Y CN 2351551Y CN 98232431 U CN98232431 U CN 98232431U CN 98232431 U CN98232431 U CN 98232431U CN 2351551 Y CN2351551 Y CN 2351551Y
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- electrode
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- metal ring
- main electrode
- double
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Abstract
The utility model provides a double-lateral electrode system with high resolution for logging equipment. The existing metal ring called A0 is replaced by three metal rings called A01', A00 and A01 as a main electrode, and other electrodes are not changed. When the three metal rings called A01', A00 and A01 are regarded as the main electrode, the depth of detection can remain unchanged at the time of double-lateral well detection. When the A00 is regarded as an independent electrode, the stratum resolution of the double-lateral well detection can reach 0.2 to 0.3 meter. The utility model can be suitable for the double-lateral well detection for the thin stratum needing resolution.
Description
The utility model belongs to the oil well logging field, particularly a kind of device that is used for dual laterolog.
Existing dual laterolog equipment electrode system is that cover constitutes with a plurality of different in width and with the metal ring that different interval is arranged on the insulating carrier of elongated cylindrical, metal ring is called electrode again, and during oil reservoir logging, electrode system is inserted into the down-hole, specifically constitute with reference to Fig. 1, the center is A
0Electrode is with A
0Electrode is that axis of symmetry is upwards arranged four electrodes, is respectively M
1', M
2', A
1', A
2', arrange four electrodes downwards, be respectively M
1, M
2, A
1, A
2A
0Be called main electrode, A
1', A
2', A
1, A
2Being called bucking electrode, all is current electrode, and M
1', M
2', M
1, M
2It is monitor electrode.The vertical resolution that aforementioned existing dual laterolog equipment is showed when logging well is roughly 00 ' (M
1With M
2Between mid point be called 0), M
1' with M
2' between mid point be called 0 ', generally be about about 0.7 meter.To some thin strates, such vertical resolution is not enough, and existing bilateral is very limited to improving on the vertical resolution, its reason be to improve vertical resolution need be with main electrode electric current I A
0Width reduce, be about to 00 ' distance and reduce, but 00 ' reduce to be very limited, reason has two, the one, if with A
1', A
2', A
1, A
2Size reduce in proportion, then the investigation depth of entire electrode system is approximate descends in proportion, thereby has sacrificed investigation depth; The 2nd, if A
1', A
2', A
1, A
2Size remain unchanged, investigation depth can not descend, but the influence of well and country rock becomes very complicated, data is used very difficult.
The purpose of this utility model is to provide a kind of high-resolution dual laterolog equipment electrode system, after the use kind electrode system, can guarantee that dual laterolog equipment has original enough investigation depths, can improve the stratigraphic resolution of this dual laterolog equipment again.
The utility model is realized as follows.
High-resolution dual laterolog equipment electrode system of the present utility model is by the insulating carrier of elongated cylindrical and be placed in the metal ring that is called electrode that a plurality of different in width on the aforementioned dielectric carrier arrange with different interval and constitute, and is that axis of symmetry makes the M that sequentially is arranged in from bottom to up on the main electrode with the metal ring that is called main electrode in central authorities
1', M
2', A
1', A
2' four metal rings and from top to down order are arranged in the M under the main electrode
1, M
2, A
1, A
2Four metal ring symmetric arrays, wherein main electrode is called A by three
01', A
00, A
01The metal ring that certain intervals is arranged mutually constitute.
The utility model has following advantage.
Keeping original bilateral under condition of work, with main electrode A
0Widen and be divided into three parts, the centre is A
00, two parts are respectively A up and down
01' and A
01, A
00With A
01', A
01Spaced apart, A
01' and A
01Between can power respectively or short circuit connects, during well logging, keep A
00, A
01', A
01Three electrode equipotentials.Like this, with A
00, A
01', A
01Three electrodes lump together when regarding an electrode as, with original bilateral to identical, can realize original bilateral to measurement.If measure A more respectively
00Electrode IA
00D(dark side direction), IA
00S(shallow side direction), same available bilateral calculates the measurement apparent resistivity to similar formula.Because A
00Electrode is narrower, so vertical resolution is very strong, can effectively differentiate 0.2～0.3 meter stratum.Again because A
00Electric current I A
00D(or IA
00S) be subjected to A
01The electric current I A of ' electrode
01D(or IA
01S) and A
01The electric current I A of electrode
01D(or IA
01S) focussing force, only enter the stratum and more just scatter the depths, thereby can detect the more resistivity of deep formation, can not be lower than at least original bilateral to investigation depth, in addition, shoulder effect and wellbore effect also will less than original bilateral to.
Description of drawings.
Fig. 1 is the overall formation schematic diagram of the dual laterolog equipment electrode system of prior art of the present utility model.
Fig. 2 is the overall formation schematic diagram of high-resolution dual laterolog equipment electrode system of the present utility model.
Below in conjunction with accompanying drawing in detail embodiment of the present utility model is described in detail.With reference to Fig. 2, cover is loaded onto the metal ring as electrode, metal ring A on the insulating carrier 1 of elongated cylindrical
00In the central authorities of insulating carrier 1, metal ring A
00On be metal ring A
01', metal ring A
01At A
00Under, A
01', A
00, A
01The three constitutes main electrode, then upwards arranges four metal M
1', M
2', A
1' and A
2', be that axis of symmetry is arranged M downwards with the main electrode
1, M
2, A
1, A
2Totally four metal rings, wherein M
1', M
2', M
1, M
2, be monitor electrode, A
1', A
2', A
1, A
2Be bucking electrode.
Claims (1)
1. high-resolution dual laterolog equipment electrode system, by the insulating carrier 1 of elongated cylindrical and be placed in the metal ring that is called electrode that a plurality of different in width on the aforementioned dielectric carrier 1 arrange with different interval and constitute, be that axis of symmetry makes the M that sequentially is arranged in from bottom to up on the main electrode with the metal ring that is called main electrode in central authorities
1', M
2' A
1', A
2', four metal rings and from top to down order be arranged in the M under the main electrode
1, M
2, A
1, A
2Four metal ring symmetric arrays is characterized in that being called the metal ring of main electrode by being called A
01', A
00, A
01Three metal rings that certain intervals is arranged mutually constitute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98232431U CN2351551Y (en) | 1998-01-20 | 1998-01-20 | High-resolution double-lateral log equipment electrode system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98232431U CN2351551Y (en) | 1998-01-20 | 1998-01-20 | High-resolution double-lateral log equipment electrode system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2351551Y true CN2351551Y (en) | 1999-12-01 |
Family
ID=33981373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98232431U Expired - Fee Related CN2351551Y (en) | 1998-01-20 | 1998-01-20 | High-resolution double-lateral log equipment electrode system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2351551Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694157B (en) * | 2009-09-25 | 2012-04-18 | 中国电子科技集团公司第二十二研究所 | Method for shortening length of log tool and dual laterolog tool with electrode probe internally provided with electronic circuit |
| CN102767367A (en) * | 2012-07-05 | 2012-11-07 | 中国电子科技集团公司第二十二研究所 | High-resolution lateral logger and resistivity-measuring method |
| CN102767364A (en) * | 2012-07-05 | 2012-11-07 | 中国电子科技集团公司第二十二研究所 | High-resolution dual-side-direction logging instrument and resistivity measurement method |
| CN107762490A (en) * | 2016-08-17 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of horizontal well is based on dual laterolog true resistivity inversion method |
-
1998
- 1998-01-20 CN CN98232431U patent/CN2351551Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101694157B (en) * | 2009-09-25 | 2012-04-18 | 中国电子科技集团公司第二十二研究所 | Method for shortening length of log tool and dual laterolog tool with electrode probe internally provided with electronic circuit |
| CN102767367A (en) * | 2012-07-05 | 2012-11-07 | 中国电子科技集团公司第二十二研究所 | High-resolution lateral logger and resistivity-measuring method |
| CN102767364A (en) * | 2012-07-05 | 2012-11-07 | 中国电子科技集团公司第二十二研究所 | High-resolution dual-side-direction logging instrument and resistivity measurement method |
| CN102767367B (en) * | 2012-07-05 | 2015-03-25 | 中国电子科技集团公司第二十二研究所 | High-resolution lateral logger and resistivity-measuring method |
| CN102767364B (en) * | 2012-07-05 | 2015-03-25 | 中国电子科技集团公司第二十二研究所 | High-resolution dual-side-direction logging instrument and resistivity measurement method |
| CN107762490A (en) * | 2016-08-17 | 2018-03-06 | 中国石油化工股份有限公司 | A kind of horizontal well is based on dual laterolog true resistivity inversion method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |