CN103015970A - Simulated detection equipment for measurement-while-drilling resistivity logging instrument - Google Patents
Simulated detection equipment for measurement-while-drilling resistivity logging instrument Download PDFInfo
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- CN103015970A CN103015970A CN2012105076370A CN201210507637A CN103015970A CN 103015970 A CN103015970 A CN 103015970A CN 2012105076370 A CN2012105076370 A CN 2012105076370A CN 201210507637 A CN201210507637 A CN 201210507637A CN 103015970 A CN103015970 A CN 103015970A
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Abstract
The invention discloses a simulated detection equipment for a measurement-while-drilling resistivity logging instrument, which overcomes the defect of low verification and calibration accuracy of the existing measurement-while-drilling resistivity logging instrument. In the equipment, a coupling coil carries out signal transmission with the measurement-while-drilling resistivity logging instrument through an electromagnetic coupling; a receiving module receives a signal transmitted by the measurement-while-drilling resistivity logging instrument through the coupling coil; a stratigraphic simulation processing module carries out amplitude adjustment and phase adjustment on the signal transmitted by the measurement-while-drilling resistivity logging instrument to obtain a corresponding relation between the amplitude attenuation value of the signal transmitted by the measurement-while-drilling resistivity logging instrument and the resistivity of a stratum with different detection depths and a corresponding relation between the phase difference of the signal transmitted by the measurement-while-drilling resistivity logging instrument and the resistivity of the stratum with different detection depths; and a transmitting module transmits a response signal coupled with a receiving coil of the measurement-while-drilling resistivity logging instrument and used for simulating the stratum with different resistivities by utilizing the coupling coil. Through the implementation of the invention, the work efficiency and the verification and calibration accurate are improved.
Description
Technical field
The present invention relates to the detection technique of resistivity logging while drilling logging instrument, relate in particular to a kind of simulation detection equipment of resistivity logging while drilling logging instrument.
Background technology
The resistivity logging while drilling logging instrument can the stratum bore open after the very first time measure ground layer original resistivity value, can in time instruct the drilling engineer in time to process drilling program, occupying very heavy status aspect geological survey and the geosteering.For multi-faceted drilling well, the resistivity logging while drilling logging instrument seems and is even more important.
The resistivity logging while drilling logging instrument is installed in the metal drill collar of several tons of weights, and carrying is got up very difficult.Instrument utilizes high frequency (1,2MHZ) emission, reception antenna work, and antenna is sealed in the drill collar, can't directly link to each other with the external world.
To verification and the demarcation of resistivity logging while drilling logging instrument, the general employing " air falls zero " and the method for " pond demarcation " (measuring apparatus in the large pond of known resistivity) are carried out at present.The method of this detection, tester is that complexity is inaccurate again, inefficiency.And only have some verifications, can't finish or multiple spot verification detection at 2.For example, the state of detecting instrument under 80 ohm meter conditions, to work, the water of preparation hundreds of ton 80 ohm meters of justing think is very difficult.
Therefore, be necessary verification and the calibration technique of resistivity logging while drilling logging instrument are improved.
Summary of the invention
Technical problem to be solved by this invention is to overcome at present the verification of resistivity logging while drilling logging instrument and demarcate the deficiency of the low and inefficiency of accuracy.
In order to solve the problems of the technologies described above, the invention provides a kind of simulation detection equipment of resistivity logging while drilling logging instrument, comprising:
Coupling coil carries out the signal transmission by electromagnetic coupled and described resistivity logging while drilling logging instrument;
Receiver module receives the signal that described resistivity logging while drilling logging instrument is launched by described coupling coil;
Stratum simulation process module, signal to described resistivity logging while drilling logging instrument emission carries out amplitude adjusted and phase adjusted processing, obtain the corresponding relation of amplitude fading value and the resistivity on the stratum of different investigation depths of the signal of described resistivity logging while drilling logging instrument emission, and the corresponding relation of the phase difference of the signal launched of described resistivity logging while drilling logging instrument and the resistivity on the stratum of different investigation depths;
Transmitter module, the signal that utilizes the reception antenna of the emission of described coupling coil and described resistivity logging while drilling logging instrument to be coupled, the response signal on simulation different resistivity stratum.
Preferably, described coupling coil is fixedly installed on the drill collar that described resistivity logging while drilling logging instrument is installed.
Preferably, described coupling coil links to each other by signal-transmitting cable with described receiver module and transmitter module, and described signal-transmitting cable and described coupling coil consist of resonance circuit.
Preferably, coupling coil comprises the magnetic core with opening and the magnetic core coil that is wound on the magnetic core.
Preferably, the position of the described magnetic core coil of coiling is relative on described opening and the described magnetic core.
Preferably, described magnetic core coil comprises a plurality of receiving coils of different investigation depths and a plurality of transmitting coils of diverse location; The transmitting antenna of described a plurality of receiving coil and described resistivity logging while drilling logging instrument is coupled, and the reception antenna of described a plurality of transmitting coils and described resistivity logging while drilling logging instrument is coupled.
Preferably, between each described transmitting coil, between each described receiving coil and between described transmitting coil and the receiving coil, intersect and disturb all less than 1%.
Preferably, described stratum simulation process module comprises:
The first amplitude adjusted unit, the signal that described resistivity logging while drilling logging instrument is launched carries out the amplitude adjusted processing first time;
Phase adjustment unit carries out phase adjusted to the signal that amplitude adjusted is processed through the described first time and processes;
The second amplitude adjusted unit carries out the amplitude adjusted processing second time to the signal of processing through described phase adjusted, obtains amplitude fading value and the phase difference of the signal between the different reception antennas of resistivity logging while drilling logging instrument;
The corresponding relation acquiring unit, obtain the corresponding relation of amplitude fading value from the resistivity on the stratum of different investigation depths of described signal, and the corresponding relation of the phase difference of the signal of described resistivity logging while drilling logging instrument emission and the resistivity on the stratum of different investigation depths.
Preferably, described the second amplitude adjusted unit obtains the reception antenna Rf of resistivity logging while drilling logging instrument and amplitude fading value and the phase difference of the signal between the reception antenna Rn.
Preferably, described transmitter module is set to select different amplitude fading values and different phase differences, simulates described resistivity logging while drilling logging instrument to the response on described different resistivity stratum.
Compared with prior art, the application's embodiment adopts the mode of electromagnetic coupled that the resistivity logging while drilling logging instrument is detected and verification, overcomes the deficiencies in the prior art, has reduced working strength, improve the accuracy of operating efficiency and verification and demarcation, improved certainty of measurement.The application's embodiment can realize the multiple spot verification.The application's embodiment can realize the uniformity between the certainty of measurement of resistivity logging while drilling logging instrument, test linearity and the different instruments is carried out complete detection.The simulation detection equipment of the embodiment of the present application, by designing fixing amplitude fading and phase shift, can the different formation resistivity of emulation.The application's embodiment can replace the pond that the resistivity logging while drilling logging instrument is carried out analog scaling.
Other features and advantages of the present invention will be set forth in the following description, and, partly from manual, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in manual, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide the further understanding to technical solution of the present invention, and consists of the part of manual, is used from the application's embodiment one and explains technical scheme of the present invention, does not consist of the restriction to technical solution of the present invention.
Fig. 1 is the organigram of simulation detection equipment of the resistivity logging while drilling logging instrument of the embodiment of the present application.
Fig. 2 is the organigram of stratum simulation process module in the equipment of the embodiment of the present application.
Fig. 3 be the amplitude fading value of signal among the application's the embodiment and stratum resistivity concern schematic diagram.
The specific embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, how the application technology means solve technical problem to the present invention whereby, and the implementation procedure of reaching technique effect can fully understand and implements according to this.Each feature among the embodiment of the present application and the embodiment mutually combining under the prerequisite of not conflicting mutually is all within protection scope of the present invention.
As shown in Figure 1, the simulation detection equipment of the resistivity logging while drilling logging instrument of the embodiment of the present application mainly comprises coupling coil 11, receiver module 12, stratum simulation process module 13 and transmitter module 14 etc.
Coupling coil 11 carries out the signal transmission by electromagnetic coupled and resistivity logging while drilling logging instrument.
Receiver module 12 links to each other with coupling coil 11, receives the signal of resistivity logging while drilling logging instrument emission by coupling coil 11.
Stratum simulation process module 13, link to each other with receiver module 12, the signal of resistivity logging while drilling logging instrument emission is carried out amplitude adjusted and phase adjusted is processed, obtain the corresponding relation of resistivity on the stratum of the phase difference of the signal that amplitude fading value and corresponding relation and the resistivity logging while drilling logging instrument of the resistivity on the stratum of different investigation depths of the signal of resistivity logging while drilling logging instrument emission launch and different investigation depths.
Transmitter module 14 links to each other with coupling coil 11 and stratum simulation process module 13, the signal that utilizes the reception antenna of coupling coil 11 emission and resistivity logging while drilling logging instrument to be coupled, the response on simulation different resistivity stratum.
In the embodiment of the present application, receiver module 12 receives the signal that the resistivity logging while drilling logging instrument is launched by coupling coil 11, and the amplitude that transmits is monitored, and selects transmitting of different investigation depths processed accordingly according to the amplitude that transmits.
In the embodiment of the present application, the signal that transmitter module 14 utilizes the reception antenna of coupling coil 11 emissions and resistivity logging while drilling logging instrument to be coupled, select different amplitude fading values and different phase differences, simulate the resistivity logging while drilling logging instrument to the response on different resistivity stratum.
As shown in Figure 2, among the application's the embodiment, stratum simulation process module 13 mainly comprises the first amplitude adjusted unit 21, phase adjustment unit 22, the second amplitude adjusted unit 23 and corresponding relation acquiring unit 24.
The first amplitude adjusted unit 21 links to each other with receiver module 12, and the signal that the resistivity logging while drilling logging instrument of receiver module 12 receptions is launched carries out the amplitude adjusted processing first time, processes in order to signal is carried out phase adjusted.
Phase adjustment unit 22 links to each other with the first amplitude adjusted unit 21, the signal that amplitude adjusted is processed through this first time is carried out phase adjusted process, and obtains to meet resistivity logging while drilling logging instrument reception antenna (Rn, Rf) and receives the signal that requires.
The second amplitude adjusted unit 23 links to each other with phase adjustment unit 22, to carry out the amplitude adjusted processing second time through phase-adjusted signal, obtains amplitude fading value and the phase difference of the signal between the different reception antennas of resistivity logging while drilling logging instrument.
Corresponding relation acquiring unit 24, link to each other with the second amplitude adjusted unit 23 and transmitter module 14, the amplitude fading value of picked up signal and the corresponding relation of the resistivity on the stratum of different investigation depths, and the corresponding relation of the phase difference of signal and the resistivity on the stratum of different investigation depths.
Wherein, the reception of resistivity logging while drilling logging instrument reception antenna (Rn, Rf) requires as shown in the table.
Table 1, phase difference resistivity conversion table
Wherein, the amplitude fading value of above-mentioned the second amplitude adjusted unit 23 picked up signal can be carried out according to following expression.
Amplitude Ratio (dB)=A
f(dBm)-A
n(dBm) formula (1)
Wherein, Amplitude Ratio is the amplitude fading value of signal, and unit is decibel (dB); A
fThe amplitude of the signal that receives for resistivity logging while drilling logging instrument reception antenna Rf, unit is dBm (dBm); A
nThe amplitude of the signal that receives for resistivity logging while drilling logging instrument reception antenna Rn, unit is dBm.
Wherein, the amplitude fading value of the signal that obtains of above-mentioned corresponding relation acquiring unit 24 is as shown in table 2 from the corresponding relation of the resistivity on the stratum of different investigation depths.
According to following table and amplitude fading value (decibel) the as shown in Figure 3 corresponding relation with resistivity, obtain the corresponding relation of the resistivity of the amplitude fading value of each signal and Different Strata.Fig. 3 shows, after resistivity is greater than 10 ohm meters, is difficulty relatively to the simulation of resistivity.Illustrate simultaneously for 100 ohm meters, dark in the resistivity simulation of shallow three investigation depths, can't realize theoretically.
The amplitude fading value of table 2, signal and the corresponding table of the resistivity relation on the stratum of different investigation depths
| Resistivity | 0.1 | 1 | 10 | 100 |
| Super shallow penetration | 7.9 | 1.1 | 0.1 | 0.006 |
| Shallow penetration | 8.5 | 1.8 | 0.17 | XXX |
| Middle detection | 9.8 | 2.3 | 0.26 | XXX |
| Deep investigation | 7 | 1.7 | 0.12 | XXX |
First row in the upper table represents different investigation depths, and the amplitude fading value of the signal under the corresponding investigation depth is shown in the 2nd to 5 tabulation, and unit is decibel.Wherein " XXX " expression resistivity in the 5th row is nonsensical at this scope measured value, does not consider.
As shown in the table, the application's embodiment has determined respectively corresponding to formation resistivity to be four phase difference values of 0.1,1.0,10 and 100 ohm meters, and is three amplitude fading values of 0.1,1.0,10 ohm meters corresponding to formation resistivity.
Table 3, test result
Among the application's the embodiment, coupling coil 11 and receiver module 12 and transmitter module 14 link to each other by signal-transmitting cable.Signal-transmitting cable mainly comprises high-frequency joint and coaxial cable etc., consists of resonance circuit with coupling coil 11, so that signal amplitude is maximum.The application's embodiment is because the instrument operating frequency is higher, and signal-transmitting cable adopts the coaxial cable of 50 ohm of impedances to make.Among the application's the embodiment, the distribution capacity of cable is about 80-100 pico farad (PF)/rice.Requiring shunt capacitance when considering emission, receiving coil resonance is 465PF, and among the application's the embodiment, coaxial cable length is about about 6 meters.
Among the application's the embodiment, coupling coil 11 is fixed on by coil brace on the drill collar that the resistivity logging while drilling logging instrument is installed, the distance predetermined with the antenna maintenance of resistivity logging while drilling logging instrument.
Among the application's the embodiment, coupling coil 11 mainly comprises magnetic core coil and has the magnetic core of opening.Magnetic core coil is wound on the magnetic core, on the opening on the magnetic core and the magnetic core position of wound core coil relative (the application's embodiment is with 180 degree relatively).Among the application's the embodiment, the size of magnetic core upper shed can arrange as required, only guarantees more among a small circle electromagnetic field couples is had sensitivity.Magnetic core among the application's the embodiment is the magnetic core of the high magnetic magnetic conductivity of high frequency.
Coupling coil in the embodiment of the present application can detect and judges whether the resistivity logging while drilling logging instrument is working properly.Coupling coil in the embodiment of the present application can be used to pick up the signal that instrument is launched when ground handling.After again the signal of instrument emission being processed, can again be coupled to the reception antenna of instrument.
Among the application's the embodiment, magnetic core coil is according to signal frequency and amplitude, and the difference of winding method, comprise altogether dark, in, a plurality of receiving coils of shallow and super different investigation depths such as shallow, and a plurality of transmitting coils of the diverse location such as far away, near.
Among the application's the embodiment, magnetic core coil adopts the simultaneously coiling of enamel-covered wire of 16 same diameter, guarantees the sensitivity of coupled signal.
The coupling coil centre frequency that magnetic core coil assurance among the application's the embodiment is fixed on dark transmitting antenna is 1,000,000 (M) hertz, in being fixed on, shallow, super shallow coupling coil centre frequency is the 2M hertz, the coupling coil bandwidth that is fixed on far away, nearly reception antenna is the 2M hertz.
Among the application's the embodiment, receiving coil includes four kinds of Td, Tm, Ts, Tx, and transmitting coil includes two kinds of Rn, Rf.
Magnetic core coil among the application's the embodiment, corresponding one by one with the antenna of resistivity logging while drilling logging instrument, it is certain that relative position keeps.Coil Td is with after the coaxial cable that is connected connects, and resonant frequency is 1 megahertz (MHZ); Coil Tm, Ts, Tx and after coaxial cable was connected, resonant frequency was 2MHZ; Coil Rn, Rf are with after coaxial cable is connected, and resonant frequency is wideband 1-2MHZ.Among the application's the embodiment, because coupling coil can only be sensitive to electromagnetic field response among a small circle separately, disturb less than 1% so can guarantee the intersection between each magnetic core coil; Also be between each transmitting coil, between each receiving coil and between transmitting coil and the receiving coil, intersect and disturb all less than 1%.
Among the application's the embodiment, coil brace mainly comprises the nylon bracket of two semicircle annulars, and the nylon bracket of two semicircular ring is combined the bolt that forms an annulus and hinge etc.Coil brace has directionality, remains on same plane with transmitting antenna and the reception antenna of resistivity logging while drilling logging instrument, guarantees the most sensitivity of the self-corresponding aerial signal coupling of coupling coil and each, and its all parts all adopt non-magnetic material to process.
The application's embodiment can carry out by the resistivity logging while drilling logging instrument is transmitted the phase shift processing and amplitude fading is processed, and comes the instrument response on analog simulation different resistivity stratum.
Although the disclosed embodiment of the present invention as above, the embodiment that described content only adopts for ease of understanding the present invention is not to limit the present invention.Those of skill in the art under any the present invention; under the prerequisite that does not break away from the disclosed spirit and scope of the present invention; can carry out any modification and variation in form and the details implemented; but scope of patent protection of the present invention still must be as the criterion with the scope that appending claims was defined.
Claims (10)
1. the simulation detection equipment of a resistivity logging while drilling logging instrument comprises:
Coupling coil carries out the signal transmission by electromagnetic coupled and described resistivity logging while drilling logging instrument;
Receiver module receives the signal that described resistivity logging while drilling logging instrument is launched by described coupling coil;
Stratum simulation process module, signal to described resistivity logging while drilling logging instrument emission carries out amplitude adjusted and phase adjusted processing, obtain the corresponding relation of amplitude fading value and the resistivity on the stratum of different investigation depths of the signal of described resistivity logging while drilling logging instrument emission, and the corresponding relation of the phase difference of the signal launched of described resistivity logging while drilling logging instrument and the resistivity on the stratum of different investigation depths;
Transmitter module, the signal that utilizes the reception antenna of the emission of described coupling coil and described resistivity logging while drilling logging instrument to be coupled, the response on simulation different resistivity stratum.
2. equipment according to claim 1, wherein:
Described coupling coil is fixedly installed on the drill collar that described resistivity logging while drilling logging instrument is installed.
3. equipment according to claim 1, wherein:
Described coupling coil links to each other by signal-transmitting cable with described receiver module and transmitter module, and described signal-transmitting cable and described coupling coil consist of resonance circuit.
4. equipment according to claim 1, wherein:
Coupling coil comprises the magnetic core with opening and the magnetic core coil that is wound on the magnetic core.
5. equipment according to claim 4, wherein:
The position of the described magnetic core coil of coiling is relative on described opening and the described magnetic core.
6. equipment according to claim 5, wherein:
Described magnetic core coil comprises a plurality of receiving coils of different investigation depths and a plurality of transmitting coils of diverse location; The transmitting antenna of described a plurality of receiving coil and described resistivity logging while drilling logging instrument is coupled, and the reception antenna of described a plurality of transmitting coils and described resistivity logging while drilling logging instrument is coupled.
7. equipment according to claim 6, wherein:
Between each described transmitting coil, between each described receiving coil and between described transmitting coil and the receiving coil, intersect and disturb all less than 1%.
8. equipment according to claim 1, wherein, described stratum simulation process module comprises:
The first amplitude adjusted unit, the signal that described resistivity logging while drilling logging instrument is launched carries out the amplitude adjusted processing first time;
Phase adjustment unit carries out phase adjusted to the signal that amplitude adjusted is processed through the described first time and processes;
The second amplitude adjusted unit carries out the amplitude adjusted processing second time to the signal of processing through described phase adjusted, obtains amplitude fading value and the phase difference of the signal between the different reception antennas of resistivity logging while drilling logging instrument;
The corresponding relation acquiring unit, obtain the corresponding relation of amplitude fading value from the resistivity on the stratum of different investigation depths of described signal, and the corresponding relation of the phase difference of the signal of described resistivity logging while drilling logging instrument emission and the resistivity on the stratum of different investigation depths.
9. equipment according to claim 8, wherein:
Described the second amplitude adjusted unit obtains the reception antenna Rf of resistivity logging while drilling logging instrument and amplitude fading value and the phase difference of the signal between the reception antenna Rn.
10. equipment according to claim 1, wherein:
Described transmitter module is set to select different amplitude fading values and different phase differences, simulates described resistivity logging while drilling logging instrument to the response on described different resistivity stratum.
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Cited By (5)
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| CN106567708A (en) * | 2016-11-02 | 2017-04-19 | 浙江大学 | While-drilling lateral resistivity well test system based on C4D technology and signal detection method of while-drilling lateral resistivity well test system |
| CN109521386A (en) * | 2018-12-10 | 2019-03-26 | 中国海洋石油集团有限公司 | A kind of insulating panel and low-resistance signal generation apparatus |
| CN109952519A (en) * | 2016-10-31 | 2019-06-28 | 韩尉善 | By E antenna applications in resistivity well logging tool |
| CN112034257A (en) * | 2020-09-11 | 2020-12-04 | 斯伦贝谢油田技术（山东）有限公司 | Calculation method of downhole resistivity |
| CN117189089A (en) * | 2023-09-06 | 2023-12-08 | 中国科学院地质与地球物理研究所 | Calibration method, device and system of look-ahead measurement while drilling equipment |
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| CN112034257A (en) * | 2020-09-11 | 2020-12-04 | 斯伦贝谢油田技术（山东）有限公司 | Calculation method of downhole resistivity |
| CN112034257B (en) * | 2020-09-11 | 2023-09-29 | 斯伦贝谢油田技术（山东）有限公司 | Underground resistivity calculation method |
| CN117189089A (en) * | 2023-09-06 | 2023-12-08 | 中国科学院地质与地球物理研究所 | Calibration method, device and system of look-ahead measurement while drilling equipment |
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Application publication date: 20130403 |