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为了更好地确定不同波场分量和三锥形钻头的能量辐射模式,对多分量随钻资料进行了分析。使用了ENI-AGIP的一块专用试验现场的独特井间采集设计。对高质量P波和S波的直接测量可以确定径向水平分量(HR)和相应的横向水平分量(HT)。随后,分析结合Z和HR而导出的垂直横渡分量(T),得到对钻头信号的SV分量简化辐射模式的计算结果。分析了受采集观测系统和地质情况影响而形成的水平和垂直偏振横波之间的很大时间分离。根据钻头信号还得到了非常规的SV速度层析重建,并对其进行了讨论。
In order to better determine the energy radiation patterns of different wavefield components and triple-cone bits, the multi-component data is analyzed. A unique inter-well acquisition design was used at a dedicated test site using ENI-AGIP. Direct measurements of high quality P and S waves determine the radial horizontal component (HR) and the corresponding lateral horizontal component (HT). Subsequently, the vertical crossover component (T) derived in conjunction with Z and HR is analyzed to obtain the simplified radiation pattern calculation result for the SV component of the bit signal. The time separation between horizontally and vertically polarized shear waves formed by the influence of the acquisition observing system and geological conditions is analyzed. Unconventional SV velocity tomography reconstructions have also been obtained from drill bit signals and discussed.