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声激发极化是双相孔隙介质中声场向电磁场转化的过程 ,是两种地球物理波场间作用与转换的结果。本文采用简化的Biot-Rosenbaum模型模拟计算均匀各向同性孔隙饱和介质中的斯通利波 ,根据某油田一口井油水层段的实际测井资料模拟计算低频斯通利波激发极化敏感系数 ,详细分析了低频斯通利波激发极化对斯通利波频率和地层参数的敏感性 ,证实了低频斯通利波激发极化电位测量信号对地层含油性的分辨能力。
Acoustic polarization is the process of acoustic field to electromagnetic field transformation in biphasic porous media and is the result of interaction and conversion between two kinds of geophysical wavefields. In this paper, the simplified Biot-Rosenbaum model is used to simulate Stoneley waves in homogeneous isotropic pore-saturated media. The sensitivity of low-frequency Stoneley wave excitation polarization is simulated based on the actual logging data of oil and water intervals in a well. The sensitivities of low frequency Stoneley wave excitation polarization to Stoneley wave frequency and formation parameters are analyzed in detail, and the discrimination ability of low frequency Stoneley wave excitation polarization potential measurement signal to the formation oiliness is confirmed.