声波全波列测井中反射波成像分析

Analysis of Reflection Image in Sonic Full Waveform Logging.

王乃星，苏华，刘文明，等．声波全波列测井中反射波成像分析．测井技术，１９９８，２２（４）：２７８～２８３通过波场分离技术，把声波全波列测井记录中的反射波信息分离出来，并加以成像显示。根据声波全波列中的反射波信息，利用地震资料处理中的椭圆法原理计算了井外的裂缝或声阻抗界面的视倾角。与ＣＢＩＬ计算的视倾角进行对比，结果基本一致。此项结果对取得井孔附近三维成像资料和烃水界面的确定具有重要意义。

The information of the reflected wave is separated from full waveform acoustic log by using wave field separating technique and its image is displayed. On the basis of the reflection information, the apparent dip of the fracture outside the borehole or the interface of wave impedance is calculated with the principle of ellipse method which is used for seismic data processing. The results are basically consistent with those from CBIL. They are of great significance in acquiring 3D image data nearby the borehole and identifying the hydrocarbon/water contact.