Numerical modeling for a sandwich dipole well logging transmitting transducer is conducted in this *** characteristics for the first-order bending vibration of the sandwich transducer within different fluid loads are ...
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ISBN:
(纸本)9781467348140
Numerical modeling for a sandwich dipole well logging transmitting transducer is conducted in this *** characteristics for the first-order bending vibration of the sandwich transducer within different fluid loads are numerically *** is found that the resonant frequency and transmitting voltage response level are affected by the density,acoustic velocity and acoustic impedance of the fluid *** numerical results were preliminarily vahdated by our *** numerical analyses may provide useful suggestion for both the simulation design of logging transducer and the acoustic logging applications.
Wavefields excited by a dipole source with ampUtude mismatch are investigated through a 3D finite difference *** is revealed that the directional patterns of a dipole source mainly depend on the source frequency and t...
详细信息
ISBN:
(纸本)9781467348140
Wavefields excited by a dipole source with ampUtude mismatch are investigated through a 3D finite difference *** is revealed that the directional patterns of a dipole source mainly depend on the source frequency and the ampUtude ratio of the two monopoles combining the transmitter.A mismatched dipole will not generate the non-dipole components in the borehole as long as the dipole receivers are ideally *** both the transmitter and receivers are mismatched,the Stoneley mode with strong amplitudes appears in the in-line and cross-line components of the cross-dipole sonic logging *** would probably lead to incorrect evaluations of shear velocity and azimuthal anisotropy of the formation.
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