CN104060986A - Multi-frequency array electrical logging resonant launching system - Google Patents
Multi-frequency array electrical logging resonant launching system Download PDFInfo
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Abstract
The invention relates to a multi-frequency array electrical logging resonant launching system. A high-frequency signal generating unit of an FPGA (field programmable gate array) main control unit is connected with a signal isolation unit, the output end of the signal isolation unit is connected with a high-frequency driven input end, the high-frequency driven output end is connected with the input end of a power amplification unit, the power amplification unit and the output end of the FPGA main control unit are respectively connected with a switch of a high-frequency electric control switch group, the switch of the high-frequency electric control switch group is connected with a resonant matching unit, and the resonant matching unit is connected with a launching coil system. A launching load control unit of the FPGA outputs signals, then, the signals are input to the high-frequency electric control switch group, and the on-off state of the high-frequency electric control switch group is controlled by the launching load control unit of the FPGA.
Description
Technical field
The present invention relates to a kind of well logging emission system, particularly a kind of multifrequency array electric well logging resonant mode emission system.
Background technology
Electrical log main purpose is to obtain resistivity or the dielectric constant information on stratum, and then combines other formation parameters in order to calculate the hydrocarbon saturation and the distribution situation that judge reservoir.Electrical log mainly comprises nutural potential logging, resistivity logging, induction logging, electromagnetic propagation log etc.Electromagnetic propagation log claims again hyperfrequency dielectric logging, to measure with closely-related Electromagnetic Wave Propagation time of stratum dielectric constant and electromagnetic wave attenuation to distinguish oil, water layer, determine stratum water content, the electromagnetic wave of double frequency Jie electrical survey transmitting coil transmitting, two receiving coils receive signal, export two Amplitude Ratio and phase differences that receive signal.Conventional electrical survey (ES) is logged well mutually and is all belonged to the category of direct current well logging with side, for making to measure electric current by entering stratum in well, require must be full of in well mud or the water of conduction, but some information well is accurately to understand initial oil saturation or keep stratum primary permeability, often adopt oil-base mud or air drilling, make direct current well logging run into the difficulty that cannot overcome.Effect and the electromagnetic wave propagation of alternating electromagnetic field to stratum media can be because not existing conducting medium to be restricted in well, and induction logging has developed into a kind of main electrical log method in conventional logging suite.
Traditional induction logging is the electromotive force of measuring-signal, emission source frequency is between 10～200kHz, to carry the secondary current of formation information at the electromotive force of receiving coil by measuring in stratum, obtain the information about stratum, because the induction field of secondary current in receiving coil is very faint with respect to the directly coupling signal of dispatch coil, in the time of the reservoir exploration of complicated geological structure, effect is poor, longitudinal frame is low, investigation depth is more shallow.It is more serious that instrument is affected by the ambient influnences such as well, intrusion, country rock and Kelvin effect, and the formation resistivity that provides is not accurate enough, the thin layer deteetability of image documentation equipment, can not meet the needs of well logging development.Along with induction logging develops rapidly at the aspect such as Instrument Design and theoretical research, there is array induction logging Image-forming instrument, greatly improve the performance of induction logging instrument.Array phase IRT is received coil array by multiple and is formed, and same by composite signal frequency, a receipts coil array spacing and the many covers of a two receiving coil spacing formation receipts coil array, one-shot measurement can obtain many cover well logging curve of stratum.This method has been expanded the measurement category of resistivity, has reduced the impact of well, mud and other factors.
The wider array electric well logging of application at present mainly contains array induction and electromagnetic propagation resistivity logging.Array induction application multifrequency, multi-source are apart from single-shot-mono-receipts probe, and frequency is many in tens KHz left and right.The source frequency of electromagnetic propagation resistivity logging is at several megahertzes, adopts phase difference and Amplitude Ratio between the induced electromotive force of single-shot-bis-receipts probe measurement receiving coils.
For tranmitting frequency, tranmitting frequency is lower, and radial depth of investigetion is larger.Increase tranmitting frequency and contribute to improve the intensity that receives signal, improve longitudinal layered ability.If High-frequency and low-frequency is combined together, can strengthen detectivity.The mode of low-and high-frequency combination can keep the longitudinal layered ability that array phase induction logging is very strong, can ensure again the investigation depth of instrument.
Above-mentioned Method of Electrical Wells all needs reliable emission system as support, and low-and high-frequency has good application prospect in conjunction with the high-power emission system of multifrequency.The problem that induction logging emission system exists at present has emission source current excitation not high, is difficult to make stratum to reach certain induction; Downhole instrument is in the time of transmitting simultaneously, and the switching between different coils is very difficult, mostly adopts the mode of the corresponding a set of driving source of tranmitting frequency of one group of transmitting coil, in the time that the frequency of selecting is more, has increased the complexity of system.
Summary of the invention
In order to overcome above-mentioned existing methodical deficiency, the present invention proposes a kind of multifrequency array electric well logging resonant mode emission system.The present invention can realize the Frequency point sinewave output between 200kHz～10MHz, coordinates different transmitting coils, can meet low-and high-frequency in conjunction with transmitting, and realizes the High-current output of 0～5A, can keep the longitudinal layered ability of logging instrument and investigation depth.
The present invention is taking electric logging theory as basis, for the generation of detection signal phase difference and Amplitude Ratio provides a kind of emission system, make transmitting coil be operated in resonant condition and mate resonant element, can be many group coil arrays multiple tranmitting frequency between 200kHz～10MHz is provided, realize the large current sinusoidal ripple transmitting in transmitting coil load, possess the function that frequency automatically switches and transmitting coil automatically switches simultaneously.
The present invention is by the following technical solutions:
Multifrequency array electric well logging resonant mode emission system of the present invention, mainly comprises: FPGA main control unit, signal isolated location, high frequency drive unit, power amplification unit, the automatically controlled switches set of high frequency, resonance matching unit, transmitting coil system and insulating power supply group.High-frequency signal generating unit in FPGA main control unit is connected with signal isolated location, the output of signal isolated location is connected with the input of high-frequency drive, the output of high frequency drive unit is connected with the input of power amplification unit, the output of the output of power amplification unit and FPGA main control unit is all connected with the switch of the automatically controlled switches set of high frequency, the switch of the automatically controlled switches set of high frequency connects resonance matching unit, and resonance matching unit connects transmitting coil system.Insulating power supply component is main circuit DC power supply and control circuit DC power supply, main circuit DC power supply connects power amplification unit, for providing power supply to power amplification unit, control circuit DC power supply connects FPGA main control unit and high frequency drive unit, for power supply being provided to FPGA main control unit and high frequency drive unit.
Described FPGA main control unit comprises high-frequency signal generating unit and transmitting load control unit.Described high-frequency signal generating unit outputs signal to signal isolated location, and signal isolated location outputs signal to high frequency drive unit, and the output signal of high frequency drive unit inputs to power amplification unit, and the output of power amplification unit connects the automatically controlled switches set of high frequency.Described transmitting load control unit output signal inputs to the automatically controlled switches set of high frequency, and the state that turns on and off of the automatically controlled switches set of high frequency is by described transmitting load control unit control.The automatically controlled switches set of high frequency connects resonance matching unit, and resonance matching unit connects transmitting coil system.
The present invention adopts FPGA as main control chip, is mainly used in realizing the control of high-frequency signal generation and transmitting coil load.The high-frequency signal generating unit of FPGA main control unit can produce the adjustable random waveform signal of dutycycle of any frequency between 200kHz～10MHz, the high-frequency signal of multifrequency array electric well logging resonant mode emission system of the present invention adopts the adjustable square-wave signal of dutycycle of any frequency between 200kHz～10MHz, this square-wave signal is through signal isolated location, drive through high frequency drive unit, amplify at power amplification unit.The high frequency wideband that power amplification unit can be realized 200kHz～10MHz amplifies, and realizes the sine-wave current virtual value of 0～5A on coil.The automatically controlled switches set of high frequency, by its duty of transmitting load unit control of FPGA main control unit, by multi-wad join resonance matching unit and transmitting coil system, is taken turns to operate by multichannel transmitting coil.
Described high-frequency signal generating unit is realized based on FPGA and direct digital frequency synthesis technology DDS.High-frequency signal generating unit comprises frequency control module, adjusts coefficient module, control word adjusting module, phase accumulator, address adjusting module and wave memorizer.Connected mode is: described FREQUENCY CONTROL word modules and adjustment coefficient module while are as the input of control word adjusting module, the output of control word adjusting module is as the input of phase accumulator, the output of phase accumulator is as the input of address adjusting module, the output of address adjusting module is as the input of wave memorizer, and the final output of wave memorizer realizes high-frequency signal and occurs.
The concrete methods of realizing that high-frequency signal occurs is: adjust coefficient module generated frequency control word by FREQUENCY CONTROL word modules and frequency, the control word of output is converted into the frequency control word of Direct Digital frequency synthesis DDS through control word adjusting module, after phase accumulator is phase-accumulated, flow to address adjusting module as the address of tabling look-up, address adjusting module is selected signal according to output waveform, adjust the storage area of address value corresponding to different wave in wave memorizer (ROM), last according to the address value output needed number waveform of tabling look-up.Between 200kHz～10MHz, the frequency of certain Frequency point is by frequency control module and the control of adjustment coefficient module, and the frequency of DDS output signal is given by the following formula:
f
0＝(f
clk/2
N)×K，
In formula: f
ofor output frequency, f
clkfor system reference clock frequency, N is accumulator figure place, and K is incoming frequency control word, by N, K and f
clkthe combination output that can produce arbitrary frequency.
Taking output 8MHz HF square-wave signal as example, FPGA main control unit reference clock signal adopts 50MHz, phase accumulator is selected 8, while exporting 8MHz signal, K value is 40.96, can setpoint frequency control module output frequency control word be now 64, adjusting coefficient module output frequency adjustment coefficient is 0.64, control word adjusting module is adjusted coefficient by the frequency of the frequency control word of frequency control module output and the output of adjustment coefficient module and is done multiplying, finally through phase accumulator and address adjusting module, read the waveform in wave memorizer, the high-frequency signal that output needs.The dutycycle of output HF square-wave signal can be adjusted in wave memorizer.Can realize equally the signal output of any dutycycle random waveform of optional frequency between 200kHz～10MHz with identical method.
The high-frequency signal that described high-frequency signal generating unit produces, input to high frequency drive unit by signal isolated location, the function of signal isolated location is in order to isolate the electric current that high-frequency drive is inner powerful and to cause huge instantaneous transition rate at a high speed, avoiding false triggering.High frequency drive unit can realize the peak value of output current 15A, and driving frequency can be up to 45MHz, and high frequency drive unit is for the high speed switch tube of driving power amplifying unit.
In order to make stratum reach certain induction, need to improve exciting circuit output current, described power amplification unit is realized the amplification of signal.High frequency power is amplified the efficiency and the frequency characteristic that need to consider circuit.Due to the restriction of upper and lower two transistors of H bridge circuit conducting simultaneously, it is had problems in the time that high frequency moves, adopt the pattern of multiple switching tube work, when switching tube conversion, may cause the situation of the conducting simultaneously of two transistors or cut-off, increasing circuit loss, lowers efficiency.Therefore power amplification unit of the present invention adopts single tube to amplify.
The automatically controlled switches set of described high frequency is carried out the control of on off state by the transmitting load control unit of FPGA main control unit.The automatically controlled switches set maximum operating frequency of high frequency is 30MHz or 1GHz, and contact electrical current can reach 10A.The automatically controlled switches set of high frequency connects resonance matching unit and transmitting coil system, and then controls the duty of transmitting coil.The different operating frequency of correspondence when multiple transmitting coils that transmitting coil system comprises are worked, by high frequency electric-controlled switch, high frequency relay is selected actuating coil, each coil transmitting a period of time, is then switched to other coils and works on.
Described transmitting coil system is made up of multiple independently transmitting coils, each transmitting coil passes through automatically controlled its duty of switches set control of high frequency, the corresponding tranmitting frequency of each transmitting coil, and transmitting coil is operated in resonant condition, participate in resonance as one of resonant tank, resonant frequency is:
Wherein f is resonant frequency, L
tfor transmitting coil inductance value, C is matching capacitance.
According to resonant frequency, the matching capacitance of each transmitting coil coupling relevant parameter.The sine wave signal of any frequency between the final 200kHz～10MHz that can realize 0～5A virtual value on each transmitting coil.
Multifrequency array electric well logging resonant mode emission system of the present invention is measured phase difference and the Amplitude Ratio of low frequency signals, measures the phase difference of higher frequency signals simultaneously.Low frequency signals and formation resistivity characteristic relation are close, are subject to that shoulder effect is little, investigation depth is large, vertical resolution is stronger.Higher frequency signals is not only relevant with formation resistivity characteristic, also relevant with dielectric constant.The operating frequency of signal has determined the relation between Amplitude Ratio and phase information and formation information, and the selection of operating frequency has determined the adaptedness of multifrequency electromagnetic logging to stratum.Utilize the information that different operating frequency and spacing gather to carry out reasonable distribution, synthetic, make log reflect more realistically the data such as formation resistivity, invaded zone resistivity and mud resistivity.For reaching the object of reflection oil well diameter to the formation properties of different depth, use the mode of height frequency combination to keep the longitudinal layered ability of logging instrument and investigation depth.
Multifrequency array electric well logging resonant mode emission system of the present invention can realize the frequency within the scope of 200kHz～10MHz, and the excitation operating frequency using this frequency band as multifrequency electromagnetic logging instrument, can realize the demand that wide frequency range different frequency is launched.
Brief description of the drawings
Fig. 1 multifrequency array electric well logging resonant mode emission system theory diagram;
Fig. 2 high-frequency signal generating unit schematic diagram;
The schematic diagram of the automatically controlled switches set of Fig. 3 high frequency, resonance matching unit, transmitting coil system;
Fig. 4 transmitting coil two ends emitting voltage waveform, the voltage waveform at the transmitting coil two ends that wherein Fig. 4 a is 0.5MHz, Fig. 4 b is the voltage waveform at the transmitting coil two ends of 1MHz, the voltage waveform at the transmitting coil two ends that Fig. 4 c is 4MHz, the voltage waveform at the transmitting coil two ends that Fig. 4 d is 8MHz.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
The theory diagram of multifrequency array electric well logging resonant mode emission system of the present invention as shown in Figure 1.Described multifrequency array electric well logging resonant mode emission system comprises FPGA main control unit, signal isolated location, high frequency drive unit, power amplification unit, the automatically controlled switches set of high frequency, resonance matching unit, transmitting coil system and insulating power supply group.High-frequency signal generating unit in described FPGA main control unit is connected with signal isolated location, the output of signal isolated location is connected with the input of high-frequency drive, high-frequency drive output is connected with the input of power amplification unit, the output of power amplification unit and FPGA main control unit is all connected with the switch of the automatically controlled switches set of high frequency, the switch of the automatically controlled switches set of high frequency connects resonance matching unit, and resonance matching unit connects transmitting coil.Insulating power supply component is main circuit DC power supply and control circuit DC power supply, main circuit DC power supply connects power amplification unit, for providing power supply to power amplification unit, control circuit DC power supply connects FPGA main control unit and high frequency drive unit, for power supply being provided to FPGA main control unit and high frequency drive unit.
Described FPGA main control unit comprises high-frequency signal generating unit and transmitting load control unit.Described high-frequency signal generating unit outputs signal to signal isolated location, and output isolated location outputs signal to high frequency drive unit, and the output signal of high frequency drive unit inputs to power amplification unit, and the output of power amplification unit connects the automatically controlled switches set of high frequency.The output signal of described transmitting load control unit inputs to the automatically controlled switches set of high frequency, the state that turns on and off of the automatically controlled switches set of high frequency is controlled by launching load control unit, the automatically controlled switches set of high frequency connects resonance matching unit, and resonance matching unit connects transmitting coil system.
The present invention adopts FPGA as main control chip, is mainly used in realizing the control of high-frequency signal generation and transmitting coil load.The high-frequency signal generating unit of FPGA main control unit can produce the adjustable random waveform signal of dutycycle of any frequency between 200kHz～10MHz.The high-frequency signal of multifrequency array electric well logging resonant mode emission system of the present invention adopts the adjustable square-wave signal of dutycycle of any frequency between 200kHz～10MHz.This square-wave signal, through signal isolated location, drives through high frequency drive unit, amplifies at power amplification unit.The high frequency wideband that power amplification unit can be realized 200kHz～10MHz amplifies.This square-wave signal is exported to load by the automatically controlled switches set of high frequency afterwards.The automatically controlled switches set of described high frequency is by its duty of transmitting load control unit control of FPGA main control unit.The multichannel output of the automatically controlled switches set of high frequency is connected to resonance matching unit and transmitting coil system, transmitting coil is as a part for resonant tank, be operated on resonant frequency point with resonance matching unit, multichannel transmitting coil takes turns to operate with different operating frequencies, realizes the sine-wave current virtual value of 0～5A on coil.
Described high-frequency signal generating unit schematic diagram as shown in Figure 2.High-frequency signal is realized based on FPGA and direct digital frequency synthesis technology DDS.The internal module of high-frequency signal generating unit has frequency control module, adjusts coefficient module, control word adjusting module, phase accumulator, address adjusting module, and wave memorizer ROM.The connected mode of above-mentioned module is: FREQUENCY CONTROL word modules and adjustment coefficient module while are as the input of control word adjusting module, the output of control word adjusting module is as the input of phase accumulator, the output of phase accumulator is as the input of address adjusting module, the output of address adjusting module is as the input of wave memorizer ROM, and wave memorizer ROM finally realizes high-frequency signal as output and occurs.
The concrete methods of realizing that high-frequency signal occurs is: between 200kHz～10MHz, the frequency of certain Frequency point is by frequency control module and the control of adjustment coefficient module, adjust coefficient module generated frequency control word by FREQUENCY CONTROL word modules and frequency, the control word of output is converted into the frequency control word of DDS through control word adjusting module, after phase accumulator is phase-accumulated, flow to address adjusting module as the address of tabling look-up, address adjusting module is selected signal according to output waveform, adjust the storage area of address value corresponding to different wave in wave memorizer ROM, last according to the address value output needed number waveform of tabling look-up.
Figure 3 shows that the principle of the described automatically controlled switches set of high frequency, resonance matching unit, transmitting coil system.The load of power amplification unit is transmitting coil system and corresponding matching unit, and transmitting coil system comprises multiple independently transmitting coils.Figure 3 shows that taking 6 kinds of operating frequencies as example, G1, G2, G3, G4, G5, G6 are the automatically controlled switches set of high frequency that the automatically controlled switches set of 6 road high frequency becomes, M1, M2, M3, M4, M5, M6 are the resonance matching unit that 6 tunnel matching capacitance form, and T1, T2, T3, T4, T5, T6 are the transmitting coil system of 6 road transmitting coil compositions.The automatically controlled switches set of high frequency connects resonance matching unit and transmitting coil system, and then controls the duty of transmitting coil.Each road high frequency electric-controlled switch G1, G2, G3, G4, G5, G6 be matching connection electric capacity M1, M2, M3, M4, M5, M6 and transmitting coil T1, T2, T3, T4, T5, T6 respectively, corresponding one by one, be high frequency electric-controlled switch G1 matching connection electric capacity M1, matching capacitance M1 connects transmitting coil T1; High frequency electric-controlled switch G2 matching connection electric capacity M2, matching capacitance M2 connects transmitting coil T2; High frequency electric-controlled switch G3 matching connection electric capacity M3, matching capacitance M3 connects transmitting coil T3; High frequency electric-controlled switch G4 matching connection electric capacity M4, matching capacitance M4 connects emission switch T4; High frequency electric-controlled switch G5 matching connection electric capacity M5, matching capacitance M5 connects transmitting coil T5; High frequency electric-controlled switch G6 matching connection electric capacity M6, matching capacitance, M6 connects transmitting coil T6.The automatically controlled switches set of high frequency is controlled selection actuating coil, each coil transmitting a period of time, is then switched to other coils and works on.High frequency electric-controlled switch G1～G6 controls transmitting coil T1～T6 and matching capacitance M1～M6 corresponding to transmitting coil T1～T6, determines the duty of each road transmitting coil and matching capacitance.The off state of opening of G1～G6 is controlled by the transmitting load control unit of FPGA main control unit, and then controls the transmitting coil of current participation work.The corresponding tranmitting frequency of each coil, transmitting coil is operated in resonant condition, participates in resonance as one of resonant tank, realizes resonant condition work with matching capacitance.The sine wave signal of any frequency between the final 200kHz～10MHz that can realize 0～5A virtual value on each transmitting coil.
Figure 4 shows that transmitting coil two ends emitting voltage waveform, select 4 kinds of Frequency points between 200kHz～10MHz, Fig. 4 a, Fig. 4 b, Fig. 4 c and Fig. 4 d are respectively the voltage waveform at the transmitting coil two ends of 0.5MHz, 1MHz, the lower 4 kinds of frequencies of 4MHz, 8MHz.Can on coil, obtain the ideal large current sinusoidal ripple of large voltage signal.
Claims (6)
1. a multifrequency array electric well logging resonant mode emission system, it is characterized in that, described emission system mainly comprises: FPGA main control unit, signal isolated location, high frequency drive unit, power amplification unit, the automatically controlled switches set of high frequency, resonance matching unit, transmitting coil system and insulating power supply group; The high-frequency signal generating unit of described FPGA main control unit is connected with signal isolated location, the output of signal isolated location is connected with the input of high-frequency drive, high-frequency drive output is connected with the input of power amplification unit, the output of power amplification unit and FPGA main control unit is all connected with the switch of the automatically controlled switches set of high frequency, the switch that high frequency is automatically controlled group connects resonance matching unit, and resonance matching unit connects transmitting coil system; Described insulating power supply component is main circuit DC power supply and control circuit DC power supply, and main circuit DC power supply connects power amplification unit, and control circuit DC power supply connects FPGA main control unit and high frequency drive unit; FPGA main control unit comprises high-frequency signal generating unit and transmitting load control unit; Described high-frequency signal generating unit outputs signal to signal isolated location, and signal isolated location outputs signal to high frequency drive unit, and the output signal of high frequency drive unit inputs to power amplification unit, and the output of power amplification unit connects the automatically controlled switches set of high frequency; The transmitting load control unit output signal of FPGA inputs to the automatically controlled switches set of high frequency, and the state that turns on and off of the automatically controlled switches set of high frequency is by the transmitting load control unit control of FPGA; The automatically controlled switches set of high frequency output signal to resonance matching unit, resonance matching unit output signal to transmitting coil system.
2. multifrequency array electric well logging resonant mode emission system according to claim 1, is characterized in that: the independently transmitting coil that described transmitting coil system comprises many group different parameters, the diameter of each transmitting coil is identical, the number of turn and inductance value L
tdifferent; When work, different tranmitting frequency corresponding to coil in different coil arrays, described transmit frequency signal is produced by the high-frequency signal generating unit of FPGA, each transmitting coil in transmitting coil system is according to corresponding tranmitting frequency, take turns to operate and carry out signal transmitting, the transmitting coil of work at present is selected in the switching of coil by the automatically controlled switches set control of high frequency, each coil transmitting a period of time, be then switched to other coils and work on.
3. multifrequency array electric well logging resonant mode emission system according to claim 2, it is characterized in that: described transmitting coil is operated in resonant condition, participate in resonance as one of resonant tank, according to resonant frequency, the matching capacitance of each transmitting coil coupling relevant parameter.
4. multifrequency array electric well logging resonant mode emission system according to claim 3, is characterized in that: described transmitting coil sine wave output, on transmitting coil, current effective value is 0～5A.
5. multifrequency array electric well logging resonant mode emission system according to claim 1, it is characterized in that: described high-frequency signal generating unit can be realized the adjustable random waveform signal of dutycycle of any frequency between 200kHz～10MHz, the high-frequency signal of described multifrequency array electric well logging resonant mode emission system adopts the adjustable square-wave signal of dutycycle of any frequency between 200kHz～10MHz.
6. multifrequency array electric well logging resonant mode emission system according to claim 1, is characterized in that: described high-frequency signal generating unit is realized based on FPGA and direct digital frequency synthesis technology DDS; Be specially: adjust coefficient module generated frequency control word by FREQUENCY CONTROL word modules and frequency, the control word of output is converted into the frequency control word of DDS through control word adjusting module, after phase accumulator is phase-accumulated, flow to address adjusting module as the address of tabling look-up, address adjusting module is selected signal according to output waveform, adjust the storage area of address value corresponding to different wave in wave memorizer (ROM), last according to the address value output needed number waveform of tabling look-up.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481519A (en) * | 2014-09-25 | 2015-04-01 | 华中科技大学 | Cross-well electromagnetic well logging signal emission electronic system |
| CN105781538A (en) * | 2016-02-29 | 2016-07-20 | 中国科学院电工研究所 | Coil system for electromagnetic wave propagation resistivity log |
| CN108019199A (en) * | 2016-10-31 | 2018-05-11 | 北京环鼎科技有限责任公司 | A kind of radiating circuit for array induction |
| CN111155988A (en) * | 2020-01-03 | 2020-05-15 | 电子科技大学 | Multi-frequency resistivity measuring device |
| CN115441704A (en) * | 2022-09-15 | 2022-12-06 | 电子科技大学 | Interwell electromagnetic emission system with adjustable frequency amplitude |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604581A (en) * | 1983-01-11 | 1986-08-05 | Halliburton Company | Method and apparatus for deconvolving apparent conductivity measurements in induction well logging |
| RU2193655C2 (en) * | 2000-12-01 | 2002-11-27 | Закрытое акционерное общество Научно-производственная фирма "Самарские Горизонты" | Method of well electric logging in course of drilling and device for method embodiment |
| CN101338665A (en) * | 2008-06-25 | 2009-01-07 | 中国海洋石油总公司 | High-frequency electromagnetic wave sending machine |
| CN103590810A (en) * | 2013-10-26 | 2014-02-19 | 中国石油化工集团公司 | Power-adjustable emitting device used for transient electromagnetic logging |
| CN203603895U (en) * | 2013-12-14 | 2014-05-21 | 中国电子科技集团公司第二十二研究所 | Downhole measuring circuit of high-frequency array dielectric logging tool |
-
2014
- 2014-06-13 CN CN201410265847.2A patent/CN104060986B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4604581A (en) * | 1983-01-11 | 1986-08-05 | Halliburton Company | Method and apparatus for deconvolving apparent conductivity measurements in induction well logging |
| RU2193655C2 (en) * | 2000-12-01 | 2002-11-27 | Закрытое акционерное общество Научно-производственная фирма "Самарские Горизонты" | Method of well electric logging in course of drilling and device for method embodiment |
| CN101338665A (en) * | 2008-06-25 | 2009-01-07 | 中国海洋石油总公司 | High-frequency electromagnetic wave sending machine |
| CN103590810A (en) * | 2013-10-26 | 2014-02-19 | 中国石油化工集团公司 | Power-adjustable emitting device used for transient electromagnetic logging |
| CN203603895U (en) * | 2013-12-14 | 2014-05-21 | 中国电子科技集团公司第二十二研究所 | Downhole measuring circuit of high-frequency array dielectric logging tool |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481519A (en) * | 2014-09-25 | 2015-04-01 | 华中科技大学 | Cross-well electromagnetic well logging signal emission electronic system |
| CN104481519B (en) * | 2014-09-25 | 2017-06-16 | 华中科技大学 | Electromagnetic logging signal launching electronics system between a kind of well |
| CN105781538A (en) * | 2016-02-29 | 2016-07-20 | 中国科学院电工研究所 | Coil system for electromagnetic wave propagation resistivity log |
| CN105781538B (en) * | 2016-02-29 | 2019-03-05 | 中国科学院电工研究所 | A kind of electromagnetic wave resistivity logging coil array |
| CN108019199A (en) * | 2016-10-31 | 2018-05-11 | 北京环鼎科技有限责任公司 | A kind of radiating circuit for array induction |
| CN108019199B (en) * | 2016-10-31 | 2023-09-05 | 北京环鼎科技有限责任公司 | Transmitting circuit for array induction |
| CN111155988A (en) * | 2020-01-03 | 2020-05-15 | 电子科技大学 | Multi-frequency resistivity measuring device |
| CN115441704A (en) * | 2022-09-15 | 2022-12-06 | 电子科技大学 | Interwell electromagnetic emission system with adjustable frequency amplitude |
| CN115441704B (en) * | 2022-09-15 | 2024-04-16 | 电子科技大学 | Frequency amplitude adjustable interwell electromagnetic emission system |
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