【摘要】 在地震数据处理过程中 ,传统的方法都是以振幅、频率、相位等的变化为依据来拾取地震初至波。作者突破了这些传统依据 ,根据分形的原理 ,用时窗的变化来反映地震道曲线的局部形态特征 ,通过一元线性回归模型统计出曲线的形态特征参数———分数维 ,然后由分数维的变化来判断初至地震波 ,得出了一种高效的拾取初至地震波的新方法。针对该方法的计算过程开发了处理软件模块。理论的模拟证明该方法非常适用于目前越来越庞大而复杂的地震勘探数据资料的处理。通过实际的试算表明软件模块的适用性强。该方法精度高 ,计算速度极快 ,抗噪能力强 ,在低信噪比的情况下也能快速精确地拾取初至地震波。更多还原

【Abstract】 This paper discusses a fractal dimension algorithm used to detect arrival time of the first break. Based on this algorithm, a processing software module has been developed. The test of field seismic data shows that the algorithm’s processing result is agreeable. The test shows that the processing velocity and accuracy by the algorithm are higher than that by traditional methods, and the first breaks are identified according to the alteration of amplitude, frequency or phase in the seismic data processing. Practical seismic data processing in Qinghai shows the effectiveness of the method.更多还原