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Multipolar acoustic velocity log transmitting transducer

A technology for transmitting transducers and transducers, which is applied in the seismology and seismic energy generation of logging records, etc., can solve the difficulty of processing the orthogonal dipole waveform of the acquisition waveform, the target layer of the measurement does not overlap, The length of the instrument becomes larger, etc.

Inactive Publication Date: 2005-06-01
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology

Although multipole acoustic logging can be performed with this structure tool, this structure leads to longer tool length, misalignment of measured target layers, and brings difficulties to the processing of acquired waveforms, especially the processing of orthogonal dipole waveforms. Series of difficulties and demanding requirements

Method used

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  • Multipolar acoustic velocity log transmitting transducer
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  • Multipolar acoustic velocity log transmitting transducer

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Embodiment Construction

[0016] The technical characteristics of the present invention will be described in detail below in conjunction with the embodiments of the invention.

[0017] The purpose of the present invention is achieved in this way, as shown in the accompanying drawings, the multipole acoustic logging launch transducer is an array transducer formed by four strip-shaped dipole vibrators arranged along a square for bending vibration device. Each transducer occupies a side length of a square, and acoustic and electrical isolation is performed between each transducer. Each bar-shaped dipole vibrator is an array element, and its two ends in the length direction are in an embedded state. Each array element can be a piezoelectric dipole vibrator, or other transducers similar to point sound sources. The diameter range of the circumscribed circle of the multipole acoustic logging transmitting transducer is 60-95mm, and the working frequency range is 1kHz-25kHz. The acoustic radiator can adopt f...

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Abstract

The present invention is one kind of multipole sound wave well logging transducer, and belongs to the field of applied geophysics and petroleum engineering technology. Four bar dipoles are used to constitute one array transducer, and transducers are isolated acoustically and electrically, so as to constitute the multipole sound wave well logging transducer with monopole radiating function, orthogonal dipole radiating function and four-pole radiating function simultaneously for well logging in petroleum engineering. The technology of present invention may be used in shortening the multipole sound wave well logging instrument, simplifying the waveform treatment in multipole sound wave well logging and raising the speed in sound wave well logging.

Description

technical field [0001] The invention relates to a multi-pole acoustic logging transmitting transducer, which belongs to the improvement of logging technology in applied geophysics and petroleum engineering. This technology mainly constitutes an array transducer by using four strip dipoles as array elements, and adopts acoustic and electric isolation between each array element, so that it can be used in the logging construction of petroleum engineering at the same time. Multipole acoustic logging transmitting transducers with monopole radiation function, orthogonal dipole radiation function and quadrupole radiation function, and the acoustic wave radiator proposed by this technology can be used to shorten the multipole acoustic logging instrument length (at least 45cm less), simplify the multipole acoustic logging waveform processing steps and increase the acoustic logging speed. Background technique [0002] At present, the acoustic wave transmitters of existing acoustic lo...

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Application Information

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IPC IPC(8): G01V1/02G01V1/40
Inventor 乔文孝鞠晓东
Owner BC P INC CHINA NAT PETROLEUM CORP
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