CN211648135U - Small-diameter single-emitting five-collecting energy acoustic logging instrument - Google Patents
Small-diameter single-emitting five-collecting energy acoustic logging instrument Download PDFInfo
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- CN211648135U CN211648135U CN201921766807.0U CN201921766807U CN211648135U CN 211648135 U CN211648135 U CN 211648135U CN 201921766807 U CN201921766807 U CN 201921766807U CN 211648135 U CN211648135 U CN 211648135U
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Abstract
The utility model relates to a minor diameter singly sends out five receipts and gathers ability acoustic logging instrument, including the transmission line, the transmission crystal, the receiving crystal group and the receiving circuit who connect gradually, wherein, the receiving circuit includes: the receiving crystal group is connected to the signal receiving module, the signal receiving module is connected to the signal collecting and caching module, the signal collecting and caching module is connected to the time sequence control module, the time sequence control module is in bidirectional connection with the second CPU, and the second CPU is in bidirectional connection with the second CAN bus transceiving module and the memory. The sound wave full wave train signal in the sound wave logging instrument is digitally processed underground, the digitally processed signal is not affected by cable transmission attenuation, and real-time storage can be carried out underground, so that the requirement of drilling rod pumping operation of an open hole well logging construction process can be met.
Description
Technical Field
The utility model belongs to the technical field of the oil logging, concretely relates to minor diameter is single sends out five and receives and gathers ability acoustic logging instrument.
Background
In recent years, with the development of side drilling wells, horizontal wells and highly deviated wells in the development process of oil fields, the difficulty of oil exploration technology is increased, higher requirements are put on well logging, and particularly, small well bores are increased, so that small well bore instruments suitable for well conditions are needed to complete well logging operation. In order to ensure the safety and the high efficiency of the logging construction, the open hole logging construction process is provided; the open hole well logging construction process is that an instrument is conveyed to the bottom of a measuring section from a drill rod, then the instrument is pumped out from a drill hole, logging of the instrument is completed by lifting the drill rod, and the instrument completes geological exploration logging operation in a storage mode; the open hole logging construction technology puts higher requirements on the performance and the size of the downhole instrument.
The digital acoustic logging instrument is a logging method for researching a drilling geological profile and judging the well cementation quality by using acoustic characteristics such as speed, amplitude and frequency change when acoustic waves propagate in different rocks.
However, the existing digital acoustic logging instruments applied to the open hole logging construction process often directly transmit acoustic signals to the ground for digital processing, and cannot be directly applied to the open hole logging construction process of pumping through a drill pipe.
SUMMERY OF THE UTILITY MODEL
In order to solve the above-mentioned problem that exists among the prior art, the utility model provides a minor diameter singly sends out five receipts and gathers can 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 small-diameter single-transmitting five-collecting energy acoustic logging instrument, which comprises a transmitting circuit, a transmitting crystal, a receiving crystal group and a receiving circuit which are connected in sequence, wherein,
the transmission line includes: the power supply comprises a first CAN bus transceiving module, a first CPU, a boosting module, a transmission control module and a first low-voltage power supply module, wherein the first low-voltage power supply module is connected to the first CAN bus transceiving module, the first CAN bus transceiving module is in bidirectional connection with the first CPU, the first CPU is connected to the boosting module, the boosting module is connected to the transmission control module, and the transmission control module is connected to the transmitting crystal.
The receiving circuit includes: the receiving crystal group is connected to the signal receiving module, the signal receiving module is connected to the signal collecting and caching module, the signal collecting and caching module is connected to the time sequence control module, the time sequence control module is in bidirectional connection with the second CPU, and the second CPU is in bidirectional connection with the second CAN bus transceiving module and the memory.
In an embodiment of the present invention, the transmitting crystal includes a first transmitting transducer and a second transmitting transducer independent of each other, and the first transmitting transducer and the second transmitting transducer are connected to the transmitting control module.
In an embodiment of the present invention, the receiving crystal group includes a first receiving crystal, a second receiving crystal, a third receiving crystal, a fourth receiving crystal, and a fifth receiving crystal arranged in parallel.
In an embodiment of the present invention, a distance between two adjacent receiving crystals among the first receiving crystal, the second receiving crystal, the third receiving crystal, the fourth receiving crystal, and the fifth receiving crystal is 6 in.
In one embodiment of the present invention, the distance between the first receiving crystal and the emitting crystal is 3ft, and the distance between the fifth receiving crystal and the emitting crystal is 5 ft.
In an embodiment of the present invention, the signal receiving module includes a first signal receiving channel, a second signal receiving channel, a third signal receiving channel, a fourth signal receiving channel, and a fifth signal receiving channel, and the first signal receiving channel, the second signal receiving channel, the third signal receiving channel, the fourth signal receiving channel, and the fifth signal receiving channel are connected to the first receiving crystal, the second receiving crystal, the third receiving crystal, the fourth receiving crystal, and the fifth receiving crystal in a one-to-one correspondence.
In an embodiment of the present invention, the transmission line further includes a voltage-current processing module and an analog-to-digital conversion module, the voltage-current processing module is connected to the analog-to-digital conversion module, and the analog-to-digital conversion module is connected to the second CPU.
In an embodiment of the utility model, still include the leather bag, the leather bag sets up the transmission crystal with receive between the crystal group, be provided with the sound insulator in the leather bag.
In an embodiment of the present invention, the leather bag is filled with silicone oil.
In an embodiment of the present invention, the diameter of the small-diameter single-shot five-convergence energy acoustic logging tool is less than or equal to 43 mm.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses an adopt signal acquisition and buffer module to carry out digital processing to sound wave signal among the sound wave logging instrument, accomplish the digital processing of sound wave full wave train signal in the pit, the signal through digital processing does not receive the influence of cable transmission decay, can carry out real-time storage in the pit to can satisfy the drilling rod pumping operation requirement of bore hole logging construction technology, reduced the manpower and materials cost of logging operation moreover.
2. The utility model discloses a sound wave logging instrument can save data backup in the inside memory of receiving circuit when data transmission to ground, has ensured the reliability of logging information.
3. The utility model discloses a diameter of acoustic logging instrument is less, can directly pump out from the drill bit hole to be applied to open hole well logging construction technology, improved the suitability of instrument.
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 small-diameter single-shot five-convergence energy acoustic logging instrument according to an embodiment of the present invention;
fig. 2 is a block diagram of a circuit structure of a small-diameter single-emitting five-convergence energy acoustic logging instrument according to an embodiment of the present invention;
fig. 3 is a block diagram of a circuit structure of another small-diameter single-shot five-convergence energy 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 small-diameter single-emitting five-converging-energy acoustic logging instrument according to an embodiment of the present invention.
The acoustic logging instrument adopts a single-transmitting five-receiving energy gathering form and comprises a transmitting line 1, a transmitting crystal T, a sound insulator 2, a receiving crystal group and a receiving line 3 which are sequentially connected. The positions corresponding to the transmitting crystal T and the receiving crystal group are provided with sound transmission windows so as to ensure that the transmitting sound wave energy can be transmitted to the stratum, and the sound wave signals transmitted back by the stratum can reach the receiving crystal group.
The number of the emission crystals T is 1, and the emission crystals T comprise a first emission transducer and a second emission transducer which are mutually independent to form an energy-gathering combined emission structure; and the first transmitting transducer and the second transmitting transducer are both high-power transmitting transducers. When transmitting and transducing, a certain time interval exists between the first transmitting transducer and the second transmitting transducer, so that the effect of energy superposition can be achieved, larger transmitting power is obtained, and the signal transmitting and receiving quality of the acoustic logging instrument is improved.
A leather bag is arranged in the acoustic logging instrument, the leather bag is arranged between the transmitting crystal T and the receiving crystal group, and the sound insulator 3 is arranged in the leather bag. The leather bag and the sound insulation body can effectively prevent the transmission of direct waves, prevent mutual interference between transmitted sound waves and received sound waves and improve the precision of the sound wave logging instrument. The leather bag is filled with silicon oil, so that the whole acoustic logging instrument is protected from being damaged due to pressure or temperature change, and the durability of the acoustic logging instrument is improved.
The number of the receiving crystal groups is 5, and the receiving crystal groups comprise a first receiving crystal R1, a second receiving crystal R2, a third receiving crystal R3, a fourth receiving crystal R4 and a fifth receiving crystal R5 which are arranged in parallel. The distance between two adjacent receiving crystals in the five receiving crystals is 6in, so that the acoustic logging instrument can obtain a high-resolution curve; the distance between the first receiving crystal R1 and the fifth receiving crystal R5 is 24 inches, so that the acoustic logging instrument obtains a compensation acoustic curve, and the compensation acoustic curve can be processed in a depth pushing mode, and therefore compensation for influences caused by well wall collapse and instrument inclination is achieved. Therefore, the acoustic logging instrument can simultaneously obtain two acoustic time difference curves, namely a high-resolution curve and a compensation acoustic curve, in the logging process, and the precision of the logging instrument is ensured. The working mode of the acoustic logging instrument is an acoustic time difference logging mode, and in the mode, the formation porosity, lithology, pore fluid property and the like can be determined according to the propagation speed of acoustic waves in the formation.
The acoustic logging instrument of the embodiment may further have a variable density acoustic amplitude logging mode, in which the first receiving crystal R1 and the fifth receiving crystal R5 are adopted to receive the crystal received acoustic waves, the distance between the first receiving crystal R1 and the transmitting crystal T is 3ft, and the distance between the fifth receiving crystal R5 and the transmitting crystal T is 5ft, so that the acoustic logging instrument obtains a curve (CBL curve) that the amplitude of the first wave of the casing wave changes with the depth and a time-intensity curve (VDL curve) that the full wave train changes with the depth, so as to evaluate the casing well cementing quality.
The acoustic logging instrument of the embodiment is compatible with two working modes of acoustic time difference logging and variable density acoustic amplitude logging, can be used for acoustic time difference logging of a conventional open hole well, can also be applied to conditions of well cementation quality in a cased hole, confirmation of fractured strata and the like, and improves the applicability and the versatility of the instrument.
Example two
On the basis of the first embodiment, please refer to fig. 2, and fig. 2 is a circuit structure block diagram of a small-diameter single-transmitting five-convergence energy sonic logger according to an embodiment of the present invention.
In fig. 2, the internal bus runs through the entire sonic tool and is connected to both the transmit line 1 and the receive line 3. In this embodiment, the internal bus adopts the opto-coupler to keep apart, and the signal after the opto-coupler is kept apart uploads to the storage nipple joint through the bus driver, has avoided the interference between internal bus and other instruments.
The transmitting line 1 is used for realizing signal communication, excitation control, excitation boosting and voltage stabilizing functions, and the receiving line 3 is used for realizing amplification conditioning, acquisition, data caching, bus communication and data storage functions of received signals.
Specifically, the transmitting line 1 includes a first CAN bus transceiver module, a first CPU, a voltage boosting module, a transmitting control module and a first low-voltage power supply module, wherein the internal bus is connected to the first low-voltage power supply module, the first low-voltage power supply module is connected to the first CAN bus transceiver module, the first CAN bus transceiver module is bidirectionally connected to the internal bus and the first CPU, the first CPU is connected to the voltage boosting module, the voltage boosting module is connected to the transmitting control module, and the transmitting control module is connected to the transmitting crystal T. Since the transmitting crystal T comprises two transmitting transducers, the transmission control module is connected to the first transducer and the second transducer. The first low-voltage power supply module supplies power to each module in the transmitting line.
The receiving circuit 3 comprises a signal receiving module, a signal acquisition and cache module, a time sequence control module, a second CPU, a memory and a second CAN bus transceiving module, wherein the receiving crystal group is connected to the signal receiving module, the signal acquisition and cache module is connected to the time sequence control module, the time sequence control module is in bidirectional connection with the second CPU, and the second CPU is in bidirectional connection with the second CAN bus transceiving module and the memory.
Since the receiving crystal group includes five receiving crystals R1, R2, R3, R4, R5, the signal receiving module includes five signal receiving channels: the receiving device comprises a first signal receiving channel, a second signal receiving channel, a third signal receiving channel, a fourth signal receiving channel and a fifth signal receiving channel, wherein the five signal receiving channels are connected with five receiving crystals in a one-to-one correspondence mode, namely the first signal receiving channel is connected with R1, the second signal receiving channel is connected with R2, the third signal receiving channel is connected with R3, the fourth signal receiving channel is connected with R4, and the fifth signal receiving channel is connected with R5. The five receiving channels are mutually independent and have the same function, so that digital gain control of the logging acoustic signals is realized, and the acoustic signals are amplified. The five receiving channels can automatically carry out digital gain control on the logging sound wave signals, manual digital gain control can also be realized on the logging sound wave signals through ground control equipment, and the two gain control modes are set to be 16/24 grades.
Five parallel analog-to-digital converters ADC are arranged in the signal acquisition and buffer module, and the analog-to-digital converters convert the sound wave signals received by each receiving crystal into digital signals; the signal acquisition and buffer module is also provided with an RAM adopting an FPGA technology, and the digital signal converted by the ADC is buffered in the RAM. The acoustic logging instrument adopts the FPGA technology and the underground high-speed AD digitization technology, so that the interference of transmission on acoustic signals is reduced, and the measurement precision of the instrument is high, the resolution ratio is high, and the error is small.
The receiving circuit 3 is also provided with a second low-voltage power supply module, and the second low-voltage power supply module is connected with the internal bus and supplies power to each functional module (a signal receiving module, a signal acquisition and cache module, a time sequence control module, a CPU and a memory) in the receiving circuit.
The working process of the acoustic logging instrument is as follows: the instruction signal for sending the sound wave is transmitted to a first CAN bus transceiver module through an internal bus, and the first CAN bus transceiver module sends the instruction signal to a first CPU for processing and then sends the instruction signal to a boosting module; under the time sequence control of the first CPU, the boosting module boosts and stabilizes the voltage of the command signal and then sends the command signal to the emission control module, the emission control module receives the command signal and then controls the excitation of the first emission transducer and the second emission transducer in the emission crystal, and the command signal (electric signal) is converted into a sound wave signal by the first emission transducer and the second emission transducer in the emission crystal and then is emitted into the stratum. The acoustic signals propagated through the stratum enter a receiving circuit after being received by R1, R2, R3, R4 and R5, five receiving channels in a signal receiving module respectively carry out digital automatic gain control on the acoustic signals received by R1, R2, R3, R4 and R5, the amplified acoustic signals enter a signal acquisition and buffer module and are converted into logging data of electric signals through an ADC (analog to digital converter), and then the logging data are buffered in an RAM (random access memory); after the internal bus sends a command of uploading logging data, the logging data cached in the RAM enters the internal bus through the second CPU and the second CAN bus transceiver module under the control of the time sequence control module, the internal bus uploads the logging data to a ground system for collection and storage, and a sound wave time difference curve is extracted by using a similar correlation algorithm and a threshold value identification method; when the internal bus does not send a command of uploading the logging data, the logging data cached in the RAM enters a memory (FLASH) through a second CPU for storage and backup under the control of the time sequence control module.
The acoustic logging instrument is based on the design concept of the underground acoustic signal digitization technology, all acoustic wave train signals are digitized underground, signal distortion is small, additional phase shift is avoided, and the dynamic range is high; the acquired wave train information meets the conditions of the acoustic wave train correlation processing, and the acoustic wave time difference measuring result with higher measuring precision can be obtained through the correlation processing. The acoustic logging instrument directly digitizes underground acoustic signals and transmits the digitized underground acoustic signals to a remote transmission short section or a storage short section, and synchronously stores backup data in an internal FLASH of the instrument, so that the reliability of logging data is ensured. Therefore, the logging data do not need to be transmitted to the ground in real time through a cable, and the requirement for a drilling rod pumping type logging process can be met.
In addition, a voltage-current signal processing module and an analog-to-digital conversion module ADC may also be disposed in the receiving circuit of the acoustic logging instrument, please refer to fig. 3, and fig. 3 is a circuit structure block diagram of another small-diameter single-transmitting five-convergence energy acoustic logging instrument provided by an embodiment of the present invention. The voltage and current processing module is connected to the analog-to-digital conversion module ADC, and the analog-to-digital conversion module ADC is connected to the CPU. The voltage and current processing module CAN collect working voltage and working current signals of a receiving circuit, the ADC converts the working voltage and working current signals collected by the voltage and current processing module and transmits the converted signals to the second CPU, and the converted signals are transmitted to the ground through the second CAN bus transceiver module. By collecting working voltage and working current signals, the working voltage and current of the instrument can be monitored in real time, so that the working state of the instrument can be detected.
The acoustic logging instrument of this embodiment still can be through being connected with external control device, and inspection instrument's operating condition carries out self-checking and service table setting to the acoustic logging instrument before going into the well to need not artificial intervention at the logging in-process, the material resources of using manpower sparingly. In addition, the sampling duration and the number of sampling points of the acoustic logging instrument can be adjusted by connecting an external control device, so that the instrument can acquire real and effective logging data in various boreholes with different sizes.
The diameter of the acoustic logging instrument formed by the transmitting line, the transmitting crystal, the receiving crystal and the receiving line can be smaller than or equal to 43mm and far smaller than the diameter (89mm or 92mm) of the existing acoustic logging instrument, and the acoustic logging instrument can be directly pumped out from a drill bit hole, so that the acoustic logging instrument is applied to an open hole logging construction process, and the applicability of the instrument 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 small-diameter single-transmitting five-converging-energy acoustic logging instrument is characterized by comprising a transmitting line (1), a transmitting crystal (T), a receiving crystal group and a receiving line (3) which are sequentially connected, wherein,
the transmission line (1) comprises: the power supply comprises a first CAN bus transceiving module, a first CPU, a boosting module, a transmission control module and a first low-voltage power supply module, wherein the first low-voltage power supply module is connected to the first CAN bus transceiving module, the first CAN bus transceiving module is in bidirectional connection with the first CPU, the first CPU is connected to the boosting module, the boosting module is connected to the transmission control module, and the transmission control module is connected to the transmission crystal;
the receiving line (3) comprises: the receiving crystal group is connected to the signal receiving module, the signal receiving module is connected to the signal collecting and caching module, the signal collecting and caching module is connected to the time sequence control module, the time sequence control module is in bidirectional connection with the second CPU, and the second CPU is in bidirectional connection with the second CAN bus transceiving module and the memory.
2. The small diameter single-shot five-shot sonic tool as recited in claim 1, wherein the transmitting crystal (T) comprises a first transmitting transducer and a second transmitting transducer independent of each other, both the first transmitting transducer and the second transmitting transducer being connected to the transmission control module.
3. The small diameter single shot five convergence sonic tool of claim 1 wherein the set of receiving crystals includes a first receiving crystal (R1), a second receiving crystal (R2), a third receiving crystal (R3), a fourth receiving crystal (R4), and a fifth receiving crystal (R5) arranged in parallel.
4. The small diameter single shot five-shot acoustic tool of claim 3, wherein the distance between adjacent ones of the first receiving crystal (R1), the second receiving crystal (R2), the third receiving crystal (R3), the fourth receiving crystal (R4), and the fifth receiving crystal (R5) is 6 in.
5. The small diameter single shot five convergence sonic tool of claim 3 wherein the distance between the first receiving crystal (R1) and the transmitting crystal (T) is 3ft and the distance between the fifth receiving crystal (R5) and the transmitting crystal (T) is 5 ft.
6. The small diameter single shot five receive and gather sonic tool of claim 3 wherein the signal receiving module includes first, second, third, fourth and fifth signal receiving channels connected in one-to-one correspondence with the first receiving crystal (R1), the second receiving crystal (R2), the third receiving crystal (R3), the fourth receiving crystal (R4) and the fifth receiving crystal (R5).
7. The small diameter single-shot five-shot sonic tool of claim 1, wherein the receive line (3) further comprises a voltage current processing module and an analog-to-digital conversion module, the voltage current processing module being connected to the analog-to-digital conversion module, the analog-to-digital conversion module being connected to the second CPU.
8. The small diameter single-shot five-shot gather energy sonic tool of claim 1 further comprising a bladder disposed between the transmitting crystal (T) and the receiving crystal set, the bladder having a sound insulator (2) disposed therein.
9. The small-diameter single-shot five-gather energy sonic tool of claim 8 in which the bladder is filled with silicone oil.
10. The small diameter single-shot five-convergence acoustic tool of claim 1, wherein the diameter of the small diameter single-shot five-convergence acoustic tool is less than or equal to 43 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921766807.0U CN211648135U (en) | 2019-10-21 | 2019-10-21 | Small-diameter single-emitting five-collecting energy acoustic logging instrument |
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| CN201921766807.0U CN211648135U (en) | 2019-10-21 | 2019-10-21 | Small-diameter single-emitting five-collecting energy acoustic logging instrument |
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| CN211648135U true CN211648135U (en) | 2020-10-09 |
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| CN201921766807.0U Active CN211648135U (en) | 2019-10-21 | 2019-10-21 | Small-diameter single-emitting five-collecting energy acoustic logging instrument |
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