时频分析在测井声波信息提取中应用

Application of time-frequency analysis in extracting acoustic logging information

声波测井是地球物理测井方法之一,获取的声波信息中包含丰富的地层信息。文中采用时频分析方法对声波信息提取储集层性质,通过时频分布图可显示出不同振型波的能量在不同时间、不同频率段出现的分布特征。同时针对不同性质的地层如干层、水层和油层分别分析其不同的分布特征,结果表明时频分析方法对油水层的识别具有一定意义。

Acoustic logging is one of the important logging techniques, and the signals obtained contains a great amount of formation information. This paper tries to extract the information about the properties of reservoir formation from the obtained acoustic logging signals by using time-frequency analysis＇ method. From the time-frequency distribution map, the energy distribution characteristics of different type vibration wave both at different time and different frequency can be observed. And the distribution characteristics of different properties of formation, such as dry layer, water-bear layer and oil layer are analyzed. The results show that time-frequency analysis method posses certain significance for the identification of oil and water formation.