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- W2372848991 abstract "The acoustic monopole source,widely used in acoustic well logging,can be seen approximately as a point source.The acoustic field generated by the point source is mono-directional.Unlike the monopole source,the dipole and quadrupole sources are directional,but their azimuthal measurement ability is limited and they have multi-solutions in formation information inversion.Azimuthal acoustic logging is urgently required in complicated petroleum and gas reservoir exploration.The key technique that the acoustic well logging has azimuthal measurement ability is to develop a kind of downhole source which can radiate acoustic energy azimuthally.In this paper,a kind of acoustic phased arc array transmitter is presented.The arc array transmitter is composed of many ceramic flexural vibrators which are arranged in an annulus.Acoustic field generated by the phased arc array is calculated by the finite difference method.Unlike monopole,dipole and quadrupole transmitters,directional radiation is realized with the phased arc array by controlling the vibrating phase of each vibrator.It means that azimuthal measurement for acoustic logging can be realized by using this kind of phased arc array.The directivity of the arc array becomes better with increase of the number of active element,that is clearly shown with the 3dB band width of main lobe.The acoustic phased arc array,which will be used downhole in the future,is the key for azimuthal acoustic well logging which plays good application foreground in the petroleum engineerings of anisotropy evaluation,directional drilling and so on." @default.
- W2372848991 created "2016-06-24" @default.
- W2372848991 creator A5029161146 @default.
- W2372848991 date "2009-01-01" @default.
- W2372848991 modified "2023-09-22" @default.
- W2372848991 title "A Kind of Acoustic Logging with Phased Arc Array Transducer" @default.
- W2372848991 hasPublicationYear "2009" @default.
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