CN204333225U - A kind of drilling well formation resistivity measures antenna - Google Patents
A kind of drilling well formation resistivity measures antenna Download PDFInfo
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- CN204333225U CN204333225U CN201420698715.4U CN201420698715U CN204333225U CN 204333225 U CN204333225 U CN 204333225U CN 201420698715 U CN201420698715 U CN 201420698715U CN 204333225 U CN204333225 U CN 204333225U
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- antenna
- protective cover
- drilling well
- resistivity
- formation resistivity
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Abstract
The utility model provides a kind of drilling well formation resistivity to measure antenna, comprise body, antenna, protective cover, fluted in a middle part Xian Clamp-on of body is in groove, be protective cover outside antenna, the outside of protective cover flushes with body outer surface, and control circuit board electric current makes antenna obtain alternating electromagnetic field by wire, the resistivity measurement that can high and low frequency be provided in real time to mix, has enriched formation evaluation means; Low-frequency resistance rate is measured can meet low resistivity layer resistivity measurement, and be applicable to low resistivity formations well logging, the utility model structure is simple, reliable operation, obtains higher reliability in than the simpler situation of other like product structures simultaneously.
Description
Technical field
The utility model belongs to petroleum drilling engineering field, and particularly a kind of drilling well formation resistivity measures antenna.
Background technology
At the beginning of the 80's of 20th century, some fairly simple resistivity can be measured with brill electromagnetic wave resistivity logging instrument, going deep into subsequently due to research, electromagnetic wave resistivity logging instrument achieves development that is multi-faceted, multi-angle, measurement while drilling (MWD) and well logging during (LWD) application simultaneously there has also been greater advance, not only precision improves a lot, and has greatly improved especially in computational efficiency.
At present, be must survey project in high angle hole and horizontal well with boring electromagnetic wave logging.With regard to regard to brill electromagnetic wave logging, the instrument of different company, investigation depth and the slightly difference such as longitudinal frame and measuring range, but its principle is substantially identical, what essential difference was coil array arranges difference, the two model received of common employing one, the employing also had is two send out twoly to receive, four twoly to receive or the model of more multi-emitting coil, wherein the situation of multiple transmitting coil is all transmitting coil separation receiving coil both sides substantially, forms borehole compensation measuring instrument; Another is exactly the coil spacing difference of send-receive, coil distance, and investigation depth is just large, but shortcoming is reduction of the signal strength signal intensity at receiving coil place; Distance between two receiving coils is large, can the resolution of increase rate and phase place, and make the amplitude of response become large, can be reduction of the ability of instrument identification thin layer, namely the resolution of instrument reduces; Wherein the conventional field frequency used lower (most use 1kHz), analyzed, but the signal strength signal intensity of antenna is low, can only carries out some and simply measure by the induced electromotive force formation of measuring receiver.
Utility model content
The purpose of this utility model is to provide a kind of drilling well formation resistivity and measures antenna, mutually than ever like product have structure simpler, be easier to process, application surface more extensively, product that reliability is higher.
The utility model is by the following technical solutions: a kind of drilling well formation resistivity measures antenna, comprises body, antenna, protective cover, and the middle part of body is fluted, and sky line Clamp-on is in groove, and be protective cover outside antenna, the outside of protective cover flushes with body outer surface.
The resistivity measurement that described antenna can provide high and low frequency to mix by control circuit board acquisition alternating magnetic field in real time.
Alternating current arrives antenna by wire, and make antenna transmission or receive electromagnetic wave, electromagnetic wave carries out launching or receiving through protective cover.
Described protective cover and body adopt high strength resistance to erosion material.
Compared with prior art, to the utility model has the advantages that: antenna performance is more stable, electric energy loss less, and diameter is accomplished as far as possible little.
Accompanying drawing explanation
Figure l is the schematic diagram that formation resistivity of the present utility model measures antenna;
Fig. 2 is the cutaway view that formation resistivity of the present utility model measures antenna;
In figure: 1 is body, 2 is antenna, and 3 is protective cover.
Embodiment
As shown in Figure 1, a kind of drilling well formation resistivity measures antenna, and comprise body 1, antenna 2, protective cover 3, the middle part of its body 1 is fluted, and antenna 2 Clamp-on, in groove, is protective cover 3 outside antenna 2, and the outside of protective cover 3 flushes with body 1 outer surface.It is peripheral that protective cover 3 is arranged on body 1, and protective cover 3 is inserted in from body miner diameter end, thus installs more convenient, simple, and the installation of protective cover 3 is too fast in order to prevent body 1 from being washed away by mud.
The resistivity measurement that described antenna 2 can provide high and low frequency to mix by control circuit board acquisition alternating magnetic field in real time, has enriched formation evaluation means.
Alternating current arrives antenna 2 by wire, and make antenna 2 launch or receive electromagnetic wave, electromagnetic wave carries out launching or accepting through protective cover 3.
Described protective cover 3 adopts high strength resistance to erosion material with body 1.
What the formation resistivity that the utility model resistivity logging while drilling is logged well used measured antenna employing is compensation electromagnetic propagation resistivity logging technology.Compensation electromagnetic propagation resistivity logging instrument adopts the mode receiving upper and lower symmetric emission device signal to compensate measurement, has borehole compensation effect.This symmetrical compensation formula radiation pattern image data is compared to former asymmetric radiation pattern, many advantages are had: it adopts array induction coil form to launch the electromagnetic wave of different frequency to stratum when carrying out corresponding software process, with the change of tranmitting frequency, investigation depth can by the progressively expansion of shallow-layer to deep layer, the darkest investigative range can substantially exceed the depth capacity that F invades, thus realizes the object of depth sounding.This technology is measured together with the high frequency electromagnetic wave signal of standard being carried out with the electromagnetic wave signal of low frequency simultaneously, discriminance analysis and correction can be carried out to environmental impact, carry out dielectric parameter calculating, improve the ability that bed boundary divides, reservoir integrated interpretation is further improved.
Measure in antenna in the formation resistivity of this structure, wire connects upper and lower circuit plate by the centre bore of antenna 2, thus connects more convenient.
Claims (4)
1. drilling well formation resistivity measures an antenna, comprises body, antenna, protective cover, it is characterized in that the middle part of body is fluted, and sky line Clamp-on is in groove, and be protective cover outside antenna, the outside of protective cover flushes with body outer surface.
2. a kind of drilling well formation resistivity according to claim 1 measures antenna, it is characterized in that the resistivity measurement that described antenna can provide high and low frequency to mix by control circuit board acquisition alternating magnetic field in real time.
3. a kind of drilling well formation resistivity according to claim 1 measures antenna, it is characterized in that alternating current arrives antenna by wire, and make antenna transmission or receive electromagnetic wave, electromagnetic wave carries out launching or receiving through protective cover.
4. a kind of drilling well formation resistivity according to claim 1 measures antenna, it is characterized in that described protective cover and body adopt high strength resistance to erosion material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698715.4U CN204333225U (en) | 2014-11-20 | 2014-11-20 | A kind of drilling well formation resistivity measures antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420698715.4U CN204333225U (en) | 2014-11-20 | 2014-11-20 | A kind of drilling well formation resistivity measures antenna |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204333225U true CN204333225U (en) | 2015-05-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420698715.4U Active CN204333225U (en) | 2014-11-20 | 2014-11-20 | A kind of drilling well formation resistivity measures antenna |
Country Status (1)
| Country | Link |
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| CN (1) | CN204333225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191183A (en) * | 2017-07-10 | 2017-09-22 | 斯伦贝谢油田技术（山东）有限公司 | A kind of drilling well resistivity antennae |
-
2014
- 2014-11-20 CN CN201420698715.4U patent/CN204333225U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191183A (en) * | 2017-07-10 | 2017-09-22 | 斯伦贝谢油田技术（山东）有限公司 | A kind of drilling well resistivity antennae |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Dengzhou road 257091 in Shandong province Dongying City Dongcheng Development Zone No. 62 Patentee after: Schlumberger Oilfield Technology (Shandong) Co. Ltd. Address before: Dengzhou road 257091 in Shandong province Dongying City Dongcheng Development Zone No. 62 Patentee before: Schlumberger JHP Oilfield Technologies (Shandong) Co., Ltd. |