CN105089656A - Logging device and logging method - Google Patents
Logging device and logging method Download PDFInfo
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- CN105089656A CN105089656A CN201510318710.3A CN201510318710A CN105089656A CN 105089656 A CN105089656 A CN 105089656A CN 201510318710 A CN201510318710 A CN 201510318710A CN 105089656 A CN105089656 A CN 105089656A
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Abstract
The invention provides a logging device and a logging method. The logging device comprises emitting polar plates, receiving polar plates, an emission frequency controller and a processor, wherein the emission frequency controller is connected with the processor and the emitting polar plates respectively, and under the control of the processor, the emission frequency controller generates emission currents fi=nif0 corresponding to the emission polar plates respectively and triggers the emitting polar plates to emit the corresponding emission currents; the processor is electrically connected with the emitting polar plates and the receiving polar plates respectively, and is used for acquiring the emission currents of the emitting polar plates and the voltage signals of the receiving polar plates corresponding to the emitting polar plates, acquiring corresponding specific resistance of the emitting polar plates and the corresponding receiving polar plates according to the emission currents of the emitting polar plates and the voltage signals of the receiving polar plates corresponding to the emitting polar plates, and then sending the specific resistance to a ground server, wherein the emitting polar plates and the receiving polar plates are in one-to-one correspondence, i represents the ith emitting polar plate, ni is a positive integer multiple corresponding to the ith emitting polar plate, and f0 is the preset minimal fixed frequency.
Description
Technical field
The present invention relates to formation resistivity logging technical field, particularly relate to a kind of well logging apparatus and logging method.
Background technology
In oil exploration process, the rock stratum around to the borehole wall is often needed to measure, to obtain formation data.Current logging method mainly adopts electrical log, this electrical log mainly utilizes low-frequency electromagnetic wave to transmit in subterranean strata, pass through Ohm's law, know the resistivity data of rock stratum around the borehole wall, and the liquid can known in stratum according to this resistivity data is the oil of high resistivity or the water of low-resistivity.Concrete, Fig. 1 is electrical log system basic principle schematic in prior art, as shown in Figure 1, this electrical log system mainly comprises multiple transmitting pole plate 11, multiple reception pole plate 12 and processor (not shown), wherein, high voltage or constant-current source is added at transmitting pole plate 11 two ends, receiver voltage measured by reception pole plate 12, processor is for obtaining the receiver voltage of emission current and the reception pole plate corresponding with launching pole plate launching pole plate, and this receiver voltage Vr and emission current I is divided by, obtain resistivity.
And in the well logging of reality, because well is columniform, and in all directions of the borehole wall, rock formation situation is also incomplete same, therefore needs in logging system, place multiple transmitting pole plate simultaneously and receive pole plate, and it is all close to borehole wall setting.Do not adopting different frequencies between plates of similar polarity in current logging system, therefore each reception pole plate can receive the voltage signal of different frequency simultaneously, Fig. 2 is a kind of frequency selective manner of electrical log system in prior art, if frequency is as Fig. 2 way selection, can find in actual measurement, due to the nonorthogonality between frequency, the secondary lobe of side frequency can be caused to interfere with basic frequency receive, the frequency revealed can produce serious interference to side frequency, the receiver voltage causing processor to get inaccurate, and then affect the accuracy of the resistivity obtained.
Summary of the invention
The invention provides a kind of well logging apparatus and logging method, control the generation of tranmitting frequency controller by processor and generate emission current f corresponding to each transmitting pole plate respectively
i=n
if
0, ensure that the frequency of the emission current that each transmitting pole plate is corresponding is orthogonal, avoid the mutual interference between different transmitting-receiving pole plate.Thus ensure the accuracy of the voltage signal that processor gets, and then improve the accuracy of the resistivity obtained.
The invention provides a kind of well logging apparatus, comprising: launch pole plate, receive pole plate, tranmitting frequency controller, and processor;
Described tranmitting frequency controller, is electrically connected with described processor and each described transmitting pole plate respectively, under the control of described processor, generates the emission current f that each transmitting pole plate is corresponding respectively
i=n
if
0, and trigger the emission current f that correspondence launched by each transmitting pole plate
i=n
if
0;
Described processor, is electrically connected with each transmitting pole plate and each reception pole plate respectively, for obtaining the emission current of each transmitting pole plate and the voltage signal with each reception pole plate corresponding with launching pole plate; And for each transmitting pole plate and corresponding reception pole plate, according to the voltage signal of the emission current of described transmitting pole plate and reception pole plate corresponding to described transmitting pole plate, obtain corresponding resistivity; Again described resistivity is sent to ground-based server, for described ground-based server according to described each resistivity, obtain the data on stratum in described well;
Wherein, launch pole plate and receive pole plate one_to_one corresponding; I represents that i-th is launched pole plate, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.
The present invention also provides a kind of logging method, comprising:
Generate the emission current f that each transmitting pole plate is corresponding respectively
i=n
if
0, and trigger the emission current f that correspondence launched by each transmitting pole plate
i=n
if
0;
Obtain the emission current of each transmitting pole plate;
Obtain the voltage signal of the reception pole plate corresponding with each transmitting pole plate;
According to the voltage signal of the emission current of described transmitting pole plate and reception pole plate corresponding to described transmitting pole plate, obtain corresponding resistivity;
Described resistivity is sent to ground-based server, for described ground-based server according to described each resistivity, obtains the data on stratum in described well;
Wherein, i-th frequency of launching the emission current of pole plate meets f
i=n
if
0, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.
The invention provides a kind of well logging apparatus and logging method, wherein, well logging apparatus comprises: launch pole plate, receive pole plate, tranmitting frequency controller, and processor; Tranmitting frequency controller, is electrically connected with processor and each transmitting pole plate respectively, under the control of a processor, generates the emission current f that each transmitting pole plate is corresponding respectively
i=n
if
0, and trigger the emission current f that correspondence launched by each transmitting pole plate
i=n
if
0; Processor, is electrically connected with each transmitting pole plate and each reception pole plate respectively, for obtaining the emission current of each transmitting pole plate and the voltage signal with each reception pole plate corresponding with launching pole plate; And for each transmitting pole plate and corresponding reception pole plate, according to launching the emission current of pole plate and launching the voltage signal of reception pole plate corresponding to pole plate, obtain corresponding resistivity; Again resistivity is sent to ground-based server, for ground-based server according to each resistivity, obtain the data on stratum in well; Wherein, launch pole plate and receive pole plate one_to_one corresponding; I represents that i-th is launched pole plate, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.The present invention controls the generation of tranmitting frequency controller by processor and generates emission current f corresponding to each transmitting pole plate respectively
i=n
if
0, ensure that the frequency of the emission current that each transmitting pole plate is corresponding is orthogonal, avoid the mutual interference between different transmitting-receiving pole plate.Thus ensure the accuracy of the voltage signal that processor gets, and then improve the accuracy of the resistivity obtained.
Accompanying drawing explanation
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the invention of this reality, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 1 is electrical log system basic principle schematic in prior art;
Fig. 2 is a kind of frequency selective manner of electrical log system in prior art;
Fig. 3 is the structural representation of the well logging apparatus of first embodiment of the invention;
Fig. 4 is the structural representation of the well logging apparatus of second embodiment of the invention;
Fig. 5 is another structural representation of the well logging apparatus of second embodiment of the invention
Fig. 6 is the structural representation of the well logging apparatus of third embodiment of the invention;
Fig. 7 is the structural representation of the well logging apparatus of fourth embodiment of the invention;
Fig. 8 is the structural representation of the well logging apparatus of fifth embodiment of the invention;
Fig. 9 is another structural representation of the well logging apparatus of fifth embodiment of the invention;
Figure 10 is the flow chart of the logging method of sixth embodiment of the invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Fig. 3 is the structural representation of the well logging apparatus of first embodiment of the invention; As shown in Figure 3, the well logging apparatus of the present embodiment, comprising: launch pole plate 100, receive pole plate 200, tranmitting frequency controller 300, and processor 400.
Tranmitting frequency controller 300, is electrically connected with processor 400 and each transmitting pole plate 100 respectively, under the control of processor 400, generates the emission current f of each transmitting pole plate 100 correspondence respectively
i=n
if
0, and trigger the emission current f that correspondence launched by each transmitting pole plate 100
i=n
if
0; Processor 400, is electrically connected with each transmitting pole plate 100 and each reception pole plate 200 respectively, for the voltage signal of the emission current and the reception pole plate 200 corresponding with each transmitting pole plate 100 that obtain each transmitting pole plate 100; And for each transmitting pole plate 100 and corresponding reception pole plate 200, according to the voltage signal of the reception pole plate 200 of the emission current and transmitting pole plate 100 correspondence of launching pole plate 100, obtain corresponding resistivity; Again resistivity is sent to ground-based server (not shown), for ground-based server according to each resistivity, obtain the data on stratum in well.
Wherein, launch pole plate 100 and receive pole plate 200 one_to_one corresponding; I represents that i-th is launched pole plate, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.
In the present embodiment, optionally, in the underground work of reality, because well is columniform, in all directions of the borehole wall, it is not identical that rock forms situation, therefore, needs to place at least one and launch pole plate 100.Concrete, transmitting pole plate 100 can be placed 6 and be close to the borehole wall with the resolution ratio reaching 60 degree, is understandable that, the quantity of launching pole plate 100, not as limit, is determined according to resolution ratio required in actual job process.
In addition, in order to make electric current be penetrated into a certain degree stretching into the borehole wall to a certain extent, launching pole plate 100 needs the alternating current launching low frequency, usually, alternating current in the magnitude of nkHz, further, f
0with concrete the determining according to actual mechanical process of n, the application does not carry out any restriction to its concrete value.
Further, it should be noted that, the present embodiment does not limit the carrying out of the number of tranmitting frequency controller 300, tranmitting frequency controller 300 can be 1, also can be multiple, simple, uncomplicated in order to ensure the structure of well logging apparatus, the maximum quantity of tranmitting frequency controller 300 is no more than the quantity of launching pole plate 100.
Further, the quantity of the processor 400 in the present embodiment is preferably 1, also can be greater than one, and in addition, what the quantity of processor 400 was maximum is identical with the number of launching pole plate 100, namely launches the corresponding processor 400 of pole plate for one.
Concrete, the fixed frequency f in each tranmitting frequency controller 300 meets f=nf
0, such as, select f
0=1kHz, f
1=2*f
0=2kHz ..., f
6=6*f
0=6kHz, when different frequency is in the present embodiment multiplexing, because the frequency used is f
0multiple proportion, i.e. f=nf
0, the data cutout of integral multiple makes the other zero crossing of main lobe of the corresponding SIN function in frequency domain of each frequency just on other frequencies, just can realize frequency spectrum and can not be leaked on other frequencies.
In addition, tranmitting frequency controller 300, under the control of processor 400, can also generate the emitting voltage f of each transmitting pole plate 100 correspondence respectively
i=n
if
0, and trigger the emitting voltage f that correspondence launched by each transmitting pole plate 100
i=n
if
0, and obtain the emission current launching pole plate under the control of a processor.
The invention provides a kind of well logging apparatus and logging method, wherein, well logging apparatus comprises: launch pole plate, receive pole plate, tranmitting frequency controller, and processor; Tranmitting frequency controller, is electrically connected with processor and each transmitting pole plate respectively, under the control of a processor, generates the emission current f that each transmitting pole plate is corresponding respectively
i=n
if
0, and trigger the emission current f that correspondence launched by each transmitting pole plate
i=n
if
0; Processor, is electrically connected with each transmitting pole plate and each reception pole plate respectively, for obtaining the emission current of each transmitting pole plate and the voltage signal with each reception pole plate corresponding with launching pole plate; And for each transmitting pole plate and corresponding reception pole plate, according to launching the emission current of pole plate and launching the voltage signal of reception pole plate corresponding to pole plate, obtain corresponding resistivity; Again resistivity is sent to ground-based server, for ground-based server according to each resistivity, obtain the data on stratum in well; Wherein, launch pole plate and receive pole plate one_to_one corresponding; I represents that i-th is launched pole plate, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.The present invention controls the generation of tranmitting frequency controller by processor and generates emission current f corresponding to each transmitting pole plate respectively
i=n
if
0, ensure that the frequency of the emission current that each transmitting pole plate is corresponding is orthogonal, avoid the mutual interference between different transmitting-receiving pole plate.Thus ensure the accuracy of the voltage signal that processor gets, and then improve the accuracy of the resistivity obtained.
Fig. 4 is the structural representation of the well logging apparatus of second embodiment of the invention; On the basis of the technical scheme of above-mentioned first embodiment, as shown in Figure 4, tranmitting frequency controller 300, comprising: frequency synthesis module 301 and high drive module 302.
Frequency synthesis module 301, for generating the emission current f of each transmitting pole plate 100 correspondence respectively
i=n
if
0.
High drive module 302, respectively with frequency synthesis module 301 with launch pole plate 100 and be connected, for the emission current f by each transmitting pole plate 100 correspondence
i=n
if
0carry out conversion process, and trigger and launch pole plate 100 and launch the emission current after the transformation of its correspondence.
Alternatively, in the present embodiment, frequency synthesis module 301 can be the synthesizer of the Direct Digital Synthesizer (DirectDigitalSynthesizer is called for short DDS) by HOWLAND current source, for generating the current source of fixed frequency.
Further, in addition, tranmitting frequency controller can also be included as another embodiment, Fig. 5 is another structural representation of the well logging apparatus of second embodiment of the invention, wherein, tranmitting frequency controller comprises: frequency synthesis module 301, high drive module 302 and sampling resistor 303; Wherein sampling resistor is connected with transmitting pole plate and processor, and is connected in loop.In this embodiment, frequency synthesis module, can be Direct Digital Synthesizer (DirectDigitalSynthesizer, be called for short DDS) for generating the low-voltage source of fixed frequency, corresponding, high drive module, for the low-voltage of frequency synthesis CMOS macro cell is changed, obtain high voltage, and trigger the emitting voltage launching pole plate transmitting correspondence, because sampling resistor is connected in loop, so electric current is by this sampling resistor, will pressure drop being formed, by measuring this pressure drop, just can obtain the emission current launching pole plate.Concrete, sampling resistor is generally a small resistor, such as 0.5 ~ 2 ohm (ohm).
Alternatively, the high drive module 302 in the present embodiment can be high-voltage drive.
Tranmitting frequency controller in the present embodiment, by frequency synthesis module and high drive module, frequency synthesis module, for generating emission current f corresponding to each transmitting pole plate respectively
i=n
if
0.High drive module, respectively with frequency synthesis module with launch pole plate and be connected, for the emission current f by each transmitting pole plate 100 correspondence
i=n
if
0carry out conversion process, and trigger and launch pole plate and launch the emission current after the transformation of its correspondence, thus ensure that the frequency of the emission current launching pole plate 100 is controlled by frequency synthesis module.
Fig. 6 is the structural representation of the well logging apparatus of third embodiment of the invention; On the basis of the technical scheme of above-mentioned first embodiment and the second embodiment, as shown in Figure 6, processor 400, comprising: acquisition module 401, processing module 402 and CAN bus module 403.
Acquisition module 401, is electrically connected with the reception pole plate 200 launching pole plate 100 corresponding with described transmitting pole plate 100 respectively, for obtaining the emission current launching pole plate 100 and the voltage signal obtaining the reception pole plate 200 launching pole plate 100 correspondence.
Processing module 402, for each reception pole plate 200, carries out inner product process by its voltage signal and two orthogonal signalling preset, obtains the target voltage receiving pole plate 200; Processing module 402, also for launching the emission current of pole plate 100 and the target voltage of the reception pole plate 200 of transmitting pole plate 100 correspondence, obtains corresponding resistivity.
CAN bus module 403, is electrically connected with processing module 402 and ground-based server (not shown), respectively for resistivity is sent to ground-based server.
Particularly, it is as follows that processing module 402 obtains resistivity detailed process: conventional method is that IQ decomposes, namely corresponding with launching pole plate two mutually orthogonal same frequency sine-waves are stored in processing module 402, one tunnel is designated as I, one tunnel is designated as Q, differ 90 degree each other, and receive the frequency that voltage signal that pole plate 200 receives comprises the transmitting of each transmitting pole plate 100.Processing module 402 utilizes I and Q and emission current and voltage signal to do inner product, obtain emission current and voltage signal projection on both axes, here for emission current, the processing mode of processing module 402 is described, suppose emission current projection on both axes, be designated as S
iand S
q, obtain
this value is exactly obtain sinusoidal wave range value, the namely range value of emission current.And for voltage signal, processing module 402 utilizes after I and Q and voltage signal carry out inner product process, obtain target voltage, now, only comprise in target voltage and launch voltage corresponding to pole plate frequency, at this moment due to the orthogonality between different frequency, cause after the signal of other different frequency and I and Q carry out inner product process, magnitude of voltage is 0.From above-mentioned computational process, calculate a sinusoidal wave amplitude, only to need to do in twice sum once plural number ask mould, this algorithm can avoid unnecessary fft algorithm, reduces the computation complexity in processing module 402.
Alternatively, processing module 402 can be micro-control unit (MicrocontrollerUnit, be called for short MCU), CPU (CentralProcessingUnit, be called for short CPU), it can also be digital signal processor (DigitalSignalProcessor is called for short DSP).
Alternatively, CAN bus module 403 can be controller local area network's (ControllerAreaNetwork is called for short CAN) bus.
Fig. 7 is the structural representation of the well logging apparatus of fourth embodiment of the invention; On the basis of the technical scheme of above-mentioned first embodiment, the second embodiment and the 3rd embodiment, as shown in Figure 7, receive pole plate 200 to comprise: pole plate body (not shown), analog switch 201 and at least one button electrode 202.
For each button electrode 202, measure the voltage signal obtained on pole plate body.
Analog switch 201, be connected with acquisition module 401 and button electrode 202 respectively, for the control command sent according to processing module 402, measure the voltage signal of the correspondence got from least one button electrode 202 and select a voltage signal, and the voltage signal of selection is sent to acquisition module 401.
In the present embodiment, concrete, in each button electrode 202, comprise 2 button electrode, i.e. a pair button electrode, each button electrode voltage signal measured on acquisition pole plate body is actually the voltage difference between two button unit.Further, the quantity of button electrode 202 can be multiple, in actual job, the quantity of button electrode 202 is more, and the resolution ratio of horizontal direction is better, but increasing along with quantity, resistivity logging device manufacture difficulty can be caused higher, go into the well in operation process actual, preferably, in each reception pole plate 200, comprise 5 button electrode 202.
Fig. 8 is the structural representation of the well logging apparatus of fifth embodiment of the invention; On the basis of the technical scheme of above-described embodiment, as shown in Figure 8, tranmitting frequency controller 300, also comprise: the first amplification module 304, be electrically connected with sampling resistor 303 and processor 400 respectively, for carrying out amplification process to the emission current launching pole plate 100, obtain the emission current after amplifying to make processor 400.
In addition; tranmitting frequency controller 300 also comprises: for using the feed back input of receiver voltage as high drive module 302; and the high-tension isolation module (not shown) regulating high drive module 302 to generate; isolation module respectively with frequency synthesis module 301; high drive module 302 is connected with processing module 402; the magnitude of voltage of High voltage generating unit can be regulated in real time, for the protection of this well logging apparatus.
In the present embodiment, tranmitting frequency controller 300 also comprises, and for generation of the oscillation module (not shown) of frequency source, oscillation module is connected with frequency synthesis module 301.It should be noted that, this oscillation module can be included in the inside of frequency synthesis module 301.
Further, processor 400, also comprises: the first analog-to-digital conversion module 404 and the second analog-to-digital conversion module 405.
First analog-to-digital conversion module 404, is connected with transmitting pole plate 100 and acquisition module 401 respectively, and for emission current is carried out analog-to-digital conversion process, then acquisition module 401 obtains and launches the emission current of pole plate 100 after analog-to-digital conversion process; Second analog-to-digital conversion module 405, is connected with reception pole plate 200 and acquisition module 401 respectively, carries out analog-to-digital conversion process for the voltage signal received by receiver voltage, then acquisition module 401 obtains and receives the voltage signal of pole plate 200 after analog-to-digital conversion.
Particularly, the emission current got is converted into data signal by analog signal by the first analog conversion module 404.The voltage signal got is converted into data signal by analog signal by the second analog conversion module 405.
Alternatively, the first analog conversion module 404 and the second analog conversion module 405 can be analog-digital converter.
Further, receive pole plate 200, also comprise: second amplification module 203 and at least one the 3rd amplification module 204.
Second amplification module 203, is connected with analog switch 201 and the second modulus processing module 405, is amplified for the voltage signal obtained by analog switch 201, makes voltage signal reach the input full scale of the second analog-to-digital conversion module 405; Then the voltage signal after amplification is sent to the second modulus processing module 405 by analog switch 201.
Concrete, the such as input full scale of the second analog-to-digital conversion module 405 is-10V to 10V, and analog switch 201 is 0V to 5V, so just needs the second amplification module 203 to be amplified by the voltage signal of the reception of analog switch 201.
At least one the 3rd amplification module 204, is connected with button electrode 202 and analog switch 201, is amplified for the voltage signal got by the button electrode 202 of correspondence; To strengthen the voltage signal that button electrode 202 gets, then analog switch 201 receives the voltage signal that the button electrode after amplifying gets.
The voltage signal values received due to button electrode 202 is all smaller, needs the 3rd amplification module to amplify it, the voltage signal that the button electrode after making analog switch receive amplification measures.The 3rd current amplification module is fixing, but can, by using variable resistor or the manual resistance adjustment multiplication factor changed above, make it can measure the rock of corresponding maximum resistivity, the salt solution of oil or minimum specific resistance simultaneously.
Wherein, the 3rd amplification module and button electrode one_to_one corresponding.Optionally, the 3rd amplification module 204 is difference amplifier.
In addition, receive pole plate 200, also comprise: the wave filter sending voltage signal bandwidth for limiting analog switch 201, wave filter is electrically connected with analog switch 201 and the second amplification module 203.
In conjunction with above-described embodiment, the main operational principle of this well logging apparatus is: frequency synthesis module 301, under the control of processor 400, produces the emission current f launching pole plate 100 correspondence from frequency source
i=n
if
0, in high drive module 302; For the emission current f by each transmitting pole plate 100 correspondence
i=n
if
0carry out conversion process, and trigger and launch pole plate 100 and launch the emission current after the transformation of its correspondence.First amplification module 304 is for carrying out amplification process to the emission current launching pole plate 100, the emission current after amplifying is obtained to make processor 400, be sent to the first analog-to-digital conversion module 404, first analog-to-digital conversion module 404, for emission current is carried out analog-to-digital conversion, and the emission current after conversion is sent to acquisition module 401; Meanwhile, button electrode 202 is measured and is obtained the voltage signal on pole plate body; And voltage signal is sent to the 3rd amplification module 204; The voltage signal that the button electrode of correspondence gets is amplified and is sent in analog switch 204 by the 3rd amplification module 204; The control command of analog switch 204 for sending according to processing module 402, measures the voltage signal of the correspondence got from least one button electrode 202 and selects a voltage signal, and the voltage signal of selection is sent to acquisition module 401.The voltage signal that analog switch obtains is amplified by the second amplification module 203, makes voltage signal reach the input full scale of the second analog-to-digital conversion module 405, and voltage signal is sent to the second analog-to-digital conversion module 405; Second analog-to-digital conversion module 405 pairs voltage signal carries out analog-to-digital conversion, and the voltage signal after conversion is sent to acquisition module 401; Voltage signal after conversion is sent in processing module 402 by acquisition module 401, and its voltage signal and two orthogonal signalling preset, for each reception pole plate 200, are carried out inner product process by processing module 402, obtain the target voltage receiving pole plate 200; And also for according to launching the emission current of pole plate and launching the target voltage of reception pole plate corresponding to pole plate, obtain corresponding resistivity; Meanwhile, resistivity is also sent to ground-based server by CAN bus module 403 by processing module 402, for ground-based server according to each resistivity, obtains the data on stratum in well.
On the basis of the technical scheme of above-described embodiment, also there is another implementation in well logging apparatus, Fig. 9 is another structural representation of the well logging apparatus of fifth embodiment of the invention, as shown in Figure 9, namely sampling resistor 303 directly can be connected with analog switch 201 by the first amplification module 304, through analog switch 201 to acquisition module 401 transmitting electric current, the quantity of the analog-to-digital conversion module in processor 400 can be reduced like this.
Figure 10 is the flow chart of the logging method of sixth embodiment of the invention; As shown in Figure 10, the method, specifically comprises the following steps:
Step S901, obtain the emission current of each transmitting pole plate.
Step S902, obtain the voltage signal of the reception pole plate corresponding with each transmitting pole plate.
Step S903, according to launching the emission current of pole plate and launching the voltage signal of reception pole plate corresponding to pole plate, obtain corresponding resistivity.
Step S904, resistivity is sent to ground-based server, for ground-based server according to each resistivity, obtain the data on stratum in well.
Wherein, i-th frequency of launching the emission current of pole plate meets f
i=n
if
0, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.
It should be noted that, the executive agent of the technical scheme of above-mentioned execution Figure 10 embodiment of the method be the first embodiment to the well logging apparatus in the 5th embodiment, it realizes principle and technique effect is similar, does not repeat them here.
Further, step S902 comprises: to each reception pole plate, and its voltage signal and two orthogonal signalling preset are carried out inner product process, obtains the target voltage receiving pole plate;
Then according to launching the emission current of pole plate and launching the target voltage of reception pole plate corresponding to pole plate, obtain corresponding resistivity.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a well logging apparatus, is characterized in that, comprising: launch pole plate, receive pole plate, tranmitting frequency controller, and processor;
Described tranmitting frequency controller, is electrically connected with described processor and each described transmitting pole plate respectively, under the control of described processor, generates the emission current f that each transmitting pole plate is corresponding respectively
i=n
if
0, and trigger the emission current f that correspondence launched by each transmitting pole plate
i=n
if
0;
Described processor, is electrically connected with each transmitting pole plate and each reception pole plate respectively, for the voltage signal of the emission current and the reception pole plate corresponding with each transmitting pole plate that obtain each transmitting pole plate; And for each transmitting pole plate and corresponding reception pole plate, according to the voltage signal of the emission current of described transmitting pole plate and reception pole plate corresponding to described transmitting pole plate, obtain corresponding resistivity; Again described resistivity is sent to ground-based server, for described ground-based server according to described each resistivity, obtain the data on stratum in described well;
Wherein, launch pole plate and receive pole plate one_to_one corresponding; I represents that i-th is launched pole plate, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.
2. well logging apparatus according to claim 1, is characterized in that, described tranmitting frequency controller comprises:
Frequency synthesis module, is connected with described processor, for generating emission current f corresponding to each transmitting pole plate respectively
i=n
if
0;
High drive module, is connected with described frequency synthesis module and described transmitting pole plate respectively, for by emission current f corresponding for described each transmitting pole plate
i=n
if
0carry out conversion process, and trigger described transmitting pole plate launch the transformation of its correspondence after emission current.
3. well logging apparatus according to claim 1, is characterized in that, described processor comprises:
Acquisition module, reception pole plate corresponding with described transmitting pole plate and described transmitting pole plate is respectively electrically connected, for obtaining the emission current of described transmitting pole plate and obtaining the voltage signal launching reception pole plate corresponding to pole plate;
Processing module, for each reception pole plate, carries out inner product process by its voltage signal and two orthogonal signalling preset, obtains the target voltage of described reception pole plate;
Described processing module, also for the target voltage according to the emission current of described transmitting pole plate and reception pole plate corresponding to described transmitting pole plate, obtains corresponding resistivity;
CAN bus module, is electrically connected with described processing module and described ground-based server respectively, for described resistivity is sent to described ground-based server.
4. well logging apparatus according to claim 3, is characterized in that, described reception pole plate comprises: pole plate body, analog switch and at least one button electrode;
For each button electrode, measure the voltage signal obtained on described pole plate body;
Described analog switch, be connected and described processing module with described acquisition module, described button electrode respectively, for the control command sent according to described process, select a voltage signal the voltage signal of the correspondence got from least one button electrode measurement described, and the voltage signal of selection is sent to described acquisition module.
5. well logging apparatus according to claim 2, is characterized in that, described tranmitting frequency controller, also comprises:
First amplification module, is electrically connected with described transmitting pole plate and described processor respectively, for carrying out amplification process to the emission current of described transmitting pole plate, obtains the emission current after amplifying to make described processor.
6. well logging apparatus according to claim 3, is characterized in that, described processor, also comprises:
First analog-to-digital conversion module, is connected with described transmitting pole plate and described acquisition module respectively, and for described emission current is carried out analog-to-digital conversion process, then described acquisition module obtains the emission current of described transmitting pole plate after analog-to-digital conversion process;
Second analog-to-digital conversion module, is connected with described reception pole plate and described acquisition module respectively, carries out analog-to-digital conversion process for the voltage signal received by described receiver voltage, then described acquisition module obtains the voltage signal of described reception pole plate after analog-to-digital conversion.
7. well logging apparatus according to claim 4, is characterized in that, described reception pole plate, also comprises:
Second amplification module, is connected with described analog switch and described second modulus processing module, is amplified for the voltage signal obtained by described analog switch, makes described voltage signal reach the input full scale of described second analog-to-digital conversion module; Then the voltage signal after amplification is sent to described second modulus processing module by described analog switch;
At least one the 3rd amplification module, is connected with described button electrode and described analog switch, is amplified for the voltage signal got by the button electrode of described correspondence; To strengthen the voltage signal that described button electrode gets, then described analog switch receives the voltage signal that the button electrode after amplifying gets;
Wherein, described 3rd amplification module and described button electrode one_to_one corresponding.
8. a logging method, is characterized in that, comprising:
Obtain the emission current of each transmitting pole plate;
Obtain the voltage signal of the reception pole plate corresponding with each transmitting pole plate;
According to the voltage signal of the emission current of described transmitting pole plate and reception pole plate corresponding to described transmitting pole plate, obtain corresponding resistivity;
Described resistivity is sent to ground-based server, for described ground-based server according to described each resistivity, obtains the data on stratum in described well;
Wherein, i-th frequency of launching the emission current of pole plate meets f
i=n
if
0, n
ibe i-th and launch positive integer corresponding to pole plate doubly, f
0for presetting minimum fixed frequency.
9. method according to claim 8, it is characterized in that, the voltage signal of the reception pole plate that described acquisition is corresponding with each transmitting pole plate comprises: to each reception pole plate, its voltage signal and two orthogonal signalling preset is carried out inner product process, obtains the target voltage of described reception pole plate;
Then according to the target voltage of the emission current of described transmitting pole plate and reception pole plate corresponding to described transmitting pole plate, obtain corresponding resistivity.
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