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声波测井方法主要有声速测井,声幅测井和全波列声波测井等方法。其他声波测井方法仍在继续研究和探索之中。目前声波测井的发展,面波的发现和受到重视是值得注意的。今试就声波测井中的面波问题给以阐述。 在裸眼井中,当入射声波对井壁的入射角达到第一临界角时,井壁地层中产生滑行纵波。此时,有无面波产生?这样的滑行纵波是否纯是纵波?这是个值得分析的问题。
Acoustic logging methods include acoustic velocity logging, acoustic amplitude logging and full-wave acoustic logging. Other sonic logging methods are still under research and exploration. At present, the development of acoustic logging, the discovery of surface waves and the attention it is worth noting. This test to sonic wave surface wave in the problem to be elaborated. In open-hole wells, when the angle of incidence of incident sound waves on the wellbore reaches a first critical angle, a longitudinal gliding wave is generated in the wellbore formation. At this point, there is no surface wave generated? Such a gliding P-wave is purely longitudinal wave? This is a question worth analyzing.