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基于阵列声波测井资料的特点和声波在岩石中的传播规律,利用时频分析方法从阵列声波信息中提取了储层的主频、主频偏移等频域特征参数,并根据远、近波形的波至时间提取了时差信息。对不同油藏类型储层阵列声波资料进行了处理和统计分析,结果表明,所求取的声波时差能够较为准确地反映储层孔隙度的变化,主频、主频偏移等频域特征参数能够有效地描述岩性差别,且对储层流体的性质较为敏感。
Based on the characteristics of array acoustic logging data and the propagation law of sound waves in rock, time-frequency analysis method was used to extract the characteristic parameters such as frequency and frequency offset of the reservoir from the array acoustic wave information. According to the characteristics of far and near Waveform to the time to extract the time difference information. The acoustic data of reservoir arrays in different reservoir types are processed and statistically analyzed. The results show that the acquired acoustic wave time lapse can accurately reflect the change of reservoir porosity, frequency domain characteristic parameters such as dominant frequency and dominant frequency offset It can effectively describe lithology differences and is more sensitive to reservoir fluid properties.