CN210396724U - Double-transmitting four-receiving digital acoustic logging instrument - Google Patents
Double-transmitting four-receiving digital acoustic logging instrument Download PDFInfo
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- CN210396724U CN210396724U CN201920707275.7U CN201920707275U CN210396724U CN 210396724 U CN210396724 U CN 210396724U CN 201920707275 U CN201920707275 U CN 201920707275U CN 210396724 U CN210396724 U CN 210396724U
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Abstract
The utility model relates to a double-transmitting four-receiving digital acoustic logging instrument, which comprises a digital acoustic universal electronic short section and a digital acoustic logging short section which are connected with each other, wherein the digital acoustic universal electronic short section comprises a power supply conversion circuit, a control communication circuit and a signal acquisition processing circuit; the digital acoustic logging pup joint comprises a circuit part and a sound system part which are sequentially connected, wherein the circuit part comprises an analog receiving circuit, a transmitting circuit and a voltage stabilizing circuit. The embodiment of the utility model provides a circuit through in general electron nipple joint and the logging nipple joint is simple for system's overall circuit obtains simplifying, is favorable to optimizing circuit layout, thereby improves the SNR of logging instrument, strengthens the interference killing feature of logging instrument.
Description
Technical Field
The utility model belongs to the technical field of oil exploration logging, concretely relates to two send out four and receive digital acoustic logging instrument.
Background
In recent years, with the continuous increase of economy and the continuous progress of society, the oil exploration work in China is also deepened continuously. In order to better meet the requirements of modern social development, acoustic logging instruments are widely applied.
Acoustic logging is a logging method for studying the geological profile of a drilled well and evaluating the quality of well cementation based on the acoustic characteristics of the medium such as rock. The acoustic logging comprises two modes of acoustic velocity logging and acoustic amplitude logging. Sonic velocity logging, also called sonic time difference logging, mainly utilizes sonic velocity logging information to study lithology of well profile and estimate porosity of reservoir. The acoustic amplitude logging is mainly used for checking the well cementation quality.
The conventional acoustic logging instrument comprises a circuit part and an acoustic system part, wherein the acoustic system part mainly comprises a single-transmitting double-receiving part, a double-transmitting four-receiving part and the like. The single-transmitting and double-receiving digital acoustic logging instrument is abnormal in logging curve when a borehole is irregular, the thin layer identification capability of the double-transmitting and double-receiving digital acoustic logging instrument is poor, and a blind zone exists in a low-speed stratum. Although the dual-transmitting and four-receiving digital acoustic logging instrument can make up the defects of the single-transmitting and dual-receiving digital acoustic logging instrument and the dual-transmitting and dual-receiving digital acoustic logging instrument, an electronic circuit of the dual-transmitting and four-receiving digital acoustic logging instrument is complex, and the complex electronic circuit has large interference on logging signals during logging.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a two send out four receive digital acoustic logging instrument. The to-be-solved technical problem of the utility model is realized through following technical scheme:
the embodiment of the utility model provides a double-transmitting four-receiving digital acoustic logging instrument, which comprises a digital acoustic universal electronic short section and a digital acoustic logging short section which are mutually connected, wherein,
the digital sound wave universal electronic short section comprises a power supply conversion circuit, a control communication circuit and a signal acquisition processing circuit, wherein the power supply conversion circuit is connected with the control communication circuit and the signal acquisition processing circuit, and the control communication circuit is connected with the signal acquisition processing circuit in a bidirectional way;
the digital acoustic logging pup joint comprises a circuit part and a sound system part which are sequentially connected, wherein the circuit part comprises an analog receiving circuit, a transmitting circuit and a voltage stabilizing circuit, the analog receiving circuit, the transmitting circuit and the voltage stabilizing circuit are all connected with the power supply conversion circuit, the analog receiving circuit is bidirectionally connected with the signal acquisition and processing circuit, the sound system part is connected to the analog receiving circuit, the transmitting circuit is connected with the control communication circuit and the sound system part, and the voltage stabilizing circuit is connected with the sound system part.
In an embodiment of the present invention, the output voltage of the power conversion circuit is +15V, -15V, + 5V.
In an embodiment of the present invention, a plurality of DSP chips are disposed in the signal acquisition processing circuit.
In an embodiment of the present invention, the number of the DSP chips is 4.
In an embodiment of the present invention, the acoustic system part includes a transmitting area and a receiving area arranged side by side, the transmitting area is arranged between the receiving area and the circuit part, the transmitting area is connected to the transmitting circuit, and the receiving area is connected to the analog receiving circuit.
In an embodiment of the present invention, a first piezoelectric crystal transmitting probe and a second piezoelectric crystal transmitting probe are disposed in the transmitting region side by side, and the first piezoelectric crystal transmitting probe and the second piezoelectric crystal transmitting probe are respectively connected to the transmitting circuit.
In one embodiment of the present invention, the distance between the first piezo crystal emission probe and the second piezo crystal emission probe is 2 ft.
In an embodiment of the present invention, a first piezoelectric crystal receiving probe, a second piezoelectric crystal receiving probe, a third piezoelectric crystal receiving probe, and a fourth piezoelectric crystal receiving probe are disposed in parallel in the receiving area, and the first piezoelectric crystal receiving probe, the second piezoelectric crystal receiving probe, the third piezoelectric crystal receiving probe, and the fourth piezoelectric crystal receiving probe are respectively connected to the analog receiving circuit.
In an embodiment of the present invention, the distance between the first piezoelectric crystal receiving probe, the second piezoelectric crystal receiving probe, the third piezoelectric crystal receiving probe, and the fourth piezoelectric crystal receiving probe is 6 in.
In an embodiment of the present invention, the second piezoelectric crystal transmitting probe is adjacent to the first piezoelectric crystal receiving probe, and the distance between the second piezoelectric crystal transmitting probe and the first piezoelectric crystal receiving probe is 3 ft.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a circuit in general electron nipple joint and the logging nipple joint is simple for the whole circuit of system obtains simplifying, is favorable to optimizing circuit layout, thereby improves the SNR of logging instrument, strengthens the interference killing feature of logging instrument.
2. The utility model discloses set up a plurality of DSP (Digital Signal processing, signal Digital processing) chips in signal acquisition processing circuit, adopt multichannel DSP chip to handle when carrying out data processing, accelerated data processing speed; by adopting 4 DSP chips, the data processing speed is improved, and simultaneously, favorable conditions are provided for simplifying a circuit and a circuit layout.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of a dual-transmission and four-reception digital acoustic logging instrument according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another digital acoustic logging instrument according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the present invention is not limited thereto.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a dual-transmitting and four-receiving digital acoustic logging instrument according to an embodiment of the present invention.
The digital acoustic logging instrument comprises a digital acoustic universal electronic short section 1 and a digital acoustic logging short section 2 which are connected with each other. The digital acoustic wave universal electronic short section 1 and the digital acoustic wave logging short section 2 are both arranged on the measuring framework. The digital acoustic wave universal electronic short section 1 is used for controlling the gain of the digital acoustic wave logging short section 2, controlling and selecting the piezoelectric crystal to transmit acoustic wave signals, receiving the acoustic wave signals uploaded by the piezoelectric crystal receiving probe, then amplifying, filtering, isolating and carrying out analog-to-digital conversion on the uploaded acoustic wave signals, converting the acoustic wave signals into digital signals, and transmitting the digital signals to a remote transmission short section connected with the digital acoustic wave universal electronic short section 1 through an internal bus. The digital acoustic logging short joint 2 is used for receiving commands of the digital acoustic electronic short joint, completing acoustic excitation and acoustic signal receiving, and transmitting received acoustic analog signals to the digital acoustic universal electronic short joint 1.
Specifically, the digital acoustic wave universal electronic short section 1 comprises a power supply conversion circuit, a control communication circuit and a signal acquisition processing circuit. The digital acoustic logging pup joint 2 comprises a circuit part 21 and an acoustic system part 22 which are sequentially connected, wherein the circuit part 21 comprises an analog receiving circuit, a transmitting circuit and a voltage stabilizing circuit.
The power supply conversion circuit is respectively connected with the control communication circuit, the signal acquisition processing circuit, the analog receiving circuit, the transmitting circuit and the voltage stabilizing circuit. The control communication circuit is connected with the signal acquisition processing circuit in a bidirectional way. The signal acquisition circuit is bidirectionally connected to the analog receiving circuit, and the acoustic system portion 22 is connected to the analog receiving circuit. The transmitting circuit is connected to the control communication circuit and to the acoustic system portion 22. The regulator circuit is connected to the vocal system portion 22.
Because the control communication circuit, the signal acquisition processing circuit, the analog receiving circuit, the transmitting circuit and the voltage stabilizing circuit are all provided with chips with different models, the power supply conversion circuit converts the 180V voltage transmitted by the internal bus, and simultaneously outputs three voltages of +15V, -15V and +5V to supply power for the chips with different models in each circuit module. It should be noted that the power conversion circuit outputs three voltages from three output ports, which are only schematic in fig. 1, and the three outputs are represented by 1 line.
The working principle of the digital acoustic logging instrument of the embodiment is as follows:
the double-transmitting four-receiving digital acoustic logging instrument adopts a direct-reading logging mode. And the control communication circuit controls the flow of the whole logging instrument system and the communication of the telemetry nipple. Firstly, the communication circuit is controlled to transmit a command for communication to the transmitting circuit and the signal acquisition processing circuit, the transmitting circuit generates a sound wave excitation signal after receiving the communication signal and transmits the sound wave excitation signal to the acoustic system part 22, and the acoustic system part 22 transmits the sound wave signal to the well wall after receiving the excitation signal.
The signal acquisition processing circuit generates an acquisition signal after receiving the communication signal transmitted by the control communication circuit, and transmits the acquisition signal to the analog receiving circuit.
The acoustic signal is reflected by the borehole wall and received by the acoustic system part 22, and the acoustic system part 22 uploads the acoustic signal to the analog receiving circuit; the sound wave signal received by the analog receiving circuit is an analog signal, and the analog receiving circuit uploads the analog signal to the signal acquisition processing circuit according to the received acquisition signal; the signal acquisition processing circuit processes the analog signal to obtain a digital signal, uploads the digital signal to the control communication circuit according to the received communication signal, and the control communication circuit outputs the digital signal to the remote transmission short section through the internal bus.
Further, the signal acquisition processing circuit is used for amplifying, filtering, isolating and carrying out digital-to-analog conversion on the analog signals uploaded by the analog receiving circuit, and a DSP chip is used for carrying out rapid calculation to obtain digital signals. A plurality of DSP chips are arranged in the signal acquisition processing circuit, and can be used for simultaneously and rapidly calculating the signals after the analog-digital conversion, so that the data processing speed is increased. Preferably, the number of the DSP chips is 4, so that the data processing speed can be increased, and the circuit simplification is facilitated, thereby being beneficial to optimizing the circuit layout to increase the signal-to-noise ratio and enhancing the anti-interference capability of the logging instrument.
And when the digital acoustic logging instrument is communicated, the power supply conversion module continuously supplies power to the system. In the digital acoustic logging sub section, a voltage regulator circuit provides regulated voltage to the transformer in the acoustic system section 22.
The circuits in the universal electronic short section 1 and the logging short section 2 in the digital acoustic logging instrument are simple, the system circuit is simplified from the whole situation while the acoustic logging instrument function is achieved, and the optimization of the circuit layout is facilitated, so that the signal-to-noise ratio of the logging instrument is facilitated to be improved, and the anti-interference capability of the logging instrument is enhanced.
Example two
On the basis of the first embodiment, please refer to fig. 2, and fig. 2 is a schematic structural diagram of another digital acoustic logging instrument according to an embodiment of the present invention.
The acoustic portion 22 of the digital acoustic tool of FIG. 2 includes a transmitting region 221 and a receiving region 222 arranged in parallel. The transmission zone 221 is disposed between the reception zone 222 and the circuit portion 21 of the logging sub 2. The transmitting area 221 is connected to a transmitting circuit, and the receiving area 222 is connected to an analog receiving circuit.
Disposed in the launch region 221 are a first piezoelectric crystal launch probe T1 and a second piezoelectric crystal launch probe T2. The first piezoelectric crystal transmitting probe T1 and the second piezoelectric crystal transmitting probe T2 are respectively connected with a transmitting circuit. The distance d1 between the first piezo electric crystal firing probe T1 and the second piezo electric crystal firing probe T2 is 2 ft.
In the receiving region 222, a first piezoelectric crystal receiving probe R1, a second piezoelectric crystal receiving probe R2, a third piezoelectric crystal receiving probe R3 and a fourth piezoelectric crystal receiving probe R4 are arranged. The first piezoelectric crystal receiving probe R1, the second piezoelectric crystal receiving probe R2, the third piezoelectric crystal receiving probe R3 and the fourth piezoelectric crystal receiving probe R4 are respectively connected with an analog receiving circuit. The distance d2 between each two of the first piezoelectric crystal receiving probe R1, the second piezoelectric crystal receiving probe R2, the third piezoelectric crystal receiving probe R3 and the fourth piezoelectric crystal receiving probe R4 is 6 in.
In the region where the receiving region 221 is adjacent to the transmitting region 222, the second piezoelectric crystal transmitting probe T2 is adjacent to the first piezoelectric crystal receiving probe R1, and the distance d3 between the adjacent second piezoelectric crystal transmitting probe T2 and the first piezoelectric crystal receiving probe R1 is 3 ft.
The working principle of the digital acoustic logging instrument of the embodiment is as follows: the control communication circuit controls the T1 and/or the T2 to emit sound wave signals to the well wall, and the well wall reflects the sound wave signals back to be received by the R1, the R2, the R3 and the R4 and uploads the sound wave signals to the control communication circuit.
In the embodiment, the distances among the transmitting probes, among the receiving probes and between the transmitting probes and the receiving probes are respectively set to be 2ft, 6in and 3ft, so that sufficient space is provided and a foundation is laid for reasonably laying the circuit among the probes, the circuit is simplified, the signal-to-noise ratio is improved, and the anti-interference capability is improved. Meanwhile, because the circuits in the digital acoustic wave universal electronic short section part and the circuit part in the logging short section are simpler, the connection mode of each circuit with the transmitting probe and the receiving probe is simpler, the optimization of circuit wiring is facilitated, the signal-to-noise ratio of the logging instrument is improved, and the anti-interference capability is improved.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.
Claims (10)
1. A double-transmitting four-receiving digital acoustic logging instrument is characterized by comprising a digital acoustic general electronic short section (1) and a digital acoustic logging short section (2) which are connected with each other,
the digital sound wave universal electronic short section (1) comprises a power supply conversion circuit, a control communication circuit and a signal acquisition processing circuit, wherein the power supply conversion circuit is connected with the control communication circuit and the signal acquisition processing circuit, and the control communication circuit is connected with the signal acquisition processing circuit in a bidirectional mode;
the digital acoustic logging pup joint (2) comprises a circuit part (21) and a sound system part (22) which are sequentially connected, wherein the circuit part (21) comprises an analog receiving circuit, a transmitting circuit and a voltage stabilizing circuit, the analog receiving circuit, the transmitting circuit and the voltage stabilizing circuit are all connected with a power supply conversion circuit, the analog receiving circuit is bidirectionally connected with a signal acquisition and processing circuit, the sound system part (22) is connected to the analog receiving circuit, the transmitting circuit is connected with a control communication circuit and is connected to the sound system part (22), and the voltage stabilizing circuit is connected with the sound system part (22).
2. The dual-transmit-four-receive digital acoustic tool of claim 1, wherein the output voltage of the power conversion circuit is +15V, -15V, + 5V.
3. The dual-transmit-four-receive digital acoustic tool according to claim 1, wherein a plurality of DSP chips are disposed in the signal acquisition processing circuit.
4. The dual-transmit-four-receive digital acoustic tool of claim 3, wherein the number of DSP chips is 4.
5. A dual-transmit-four-receive digital acoustic tool according to claim 1, wherein the acoustic system portion (22) comprises a transmitting region (221) and a receiving region (222) arranged in parallel, the transmitting region (221) being arranged between the receiving region (222) and the circuit portion (21), the transmitting region (221) being connected to the transmitting circuit, the receiving region (222) being connected to the analog receiving circuit.
6. The dual-transmitting-four-receiving digital acoustic logging instrument according to claim 5, wherein a first piezoelectric crystal transmitting probe (T1) and a second piezoelectric crystal transmitting probe (T2) are arranged in the transmitting region (221) in parallel, and the first piezoelectric crystal transmitting probe (T1) and the second piezoelectric crystal transmitting probe (T2) are respectively connected with the transmitting circuit.
7. The dual-transmit-four-receive digital acoustic tool of claim 6, wherein the distance between the first piezoelectric crystal transmission probe (T1) and the second piezoelectric crystal transmission probe (T2) is 2 ft.
8. The dual-transmission-four-reception digital acoustic tool according to claim 6, wherein a first piezoelectric crystal receiving probe (R1), a second piezoelectric crystal receiving probe (R2), a third piezoelectric crystal receiving probe (R3) and a fourth piezoelectric crystal receiving probe (R4) are arranged in parallel in the receiving area (222), and the first piezoelectric crystal receiving probe (R1), the second piezoelectric crystal receiving probe (R2), the third piezoelectric crystal receiving probe (R3) and the fourth piezoelectric crystal receiving probe (R4) are respectively connected with the analog receiving circuit.
9. The dual-transmitter-four-receiver digital acoustic tool according to claim 8, wherein the distances between the first piezoelectric crystal receiving probe (R1), the second piezoelectric crystal receiving probe (R2), the third piezoelectric crystal receiving probe (R3), and the fourth piezoelectric crystal receiving probe (R4) are all 6 in.
10. The dual-transmit-four-receive digital acoustic tool of claim 8, wherein the second piezo emitter probe (T2) is adjacent to the first piezo receiver probe (R1), and the distance between the second piezo emitter probe (T2) and the first piezo receiver probe (R1) is 3 ft.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920707275.7U CN210396724U (en) | 2019-05-16 | 2019-05-16 | Double-transmitting four-receiving digital acoustic logging instrument |
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| CN201920707275.7U CN210396724U (en) | 2019-05-16 | 2019-05-16 | Double-transmitting four-receiving digital acoustic logging instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983692A (en) * | 2020-07-13 | 2020-11-24 | 中国石油天然气集团有限公司 | Array sound wave digital signal communication acquisition control analog device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983692A (en) * | 2020-07-13 | 2020-11-24 | 中国石油天然气集团有限公司 | Array sound wave digital signal communication acquisition control analog device |
| CN111983692B (en) * | 2020-07-13 | 2023-08-22 | 中国石油天然气集团有限公司 | Array sound wave digital signal communication acquisition control simulation device |
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