多分辨率地层纵横波时差提取

Time-difference Extraction of P-wave and S-wave in Multiple Resolution Formation

针对于不同厚度地层(特别是薄层)的纵横波时差信息提取,开发了一套处理阵列声波资料的软件。采用STC法及n次方根法,处理不同深度多个子阵列的全波波形,得到多分辨率的地层纵横波的资料。分辨率从低到高一共有7种(0.5、1.0、1.5、2.0、2.5、3.0、3.5ft)。通过对实际资料的处理,发现对薄层采用n次方根法能获得较可靠的时差信息,对于较厚的地层(大于等于2.5ft)采用STC法也能得到比较可靠的时差信息,且效率较高。使用该软件能较为可靠地获得1.5ft及以上厚度的地层的纵横波时差信息。

; A set of software for processing array acoustic wave data is developed by extrac-ting the time-difference of P-wave and S -wave in different thickness formation （espe-cially thin bed）. The STC and the n -th root method are used to deal with the full wave forms of multiple sub arrays of different depths, and the data of the formation P - wave and S^wave are obtained. The resolution ranged from low to high （0. 5, 1.0, 1. 5, 2. 0, 2. 5, 3. 0, 3. 5ft）. Through the processing of actual data, it is found that reliable time-differ-ence information can be obtained by using n -th root method. For thicker layer （greater than or equal to 2. 5ft） , the STC can obtain more reliable time -difference information, and the efficiency is higher. This software can reliably obtain the time-difference of P -wave and S-wave in the layer of 1. 5ft and above thickness.