在充液裸眼井内,推广居中轴多极子测井的响应公式,得到n阶偏心多极子产生的位移势。对于偏心偶极子,求出了位移在频率-波数域内的表达式,用实轴积分法合成声场的时域波形。 偶极子具有指向性,使用它作为发射器和接收器时,声波响应受到偏心距离以及偏心方向与发射偶极 In a fluid-filled open-hole borehole, the response formula of the central axis multipole logging is extended to obtain the displacement potential generated by the n-th order eccentric multipole. For the eccentric dipole, the expression of the displacement in the frequency-wavenumber domain is obtained, and the real-time waveform is used to synthesize the time-domain waveform of the sound field. Dipole with directivity, use it as a transmitter and receiver, the acoustic response by the eccentric distance and the eccentric direction and the launch of dipole