子波匹配和相关时差技术在二维测线拼接的应用

Application of Wavelet Matching and Correlation Delay Line in two-dimensional Splicing Technology

随着油气勘探区域不断拓展,地表条件越来越复杂,且施工年代、激发条件、检波器耦合及表层岩性的不同会对地震子波的时差、频率、相位、振幅产生不同程度的改造,从而给大剖面拼接处理带来较大的困难。以往拼接技术都存在着缺陷,对于提高信噪比、系统误差校正、子波一致性处理三者不能兼顾的原因,论文详细介绍了子波匹配和相关时差相结合处理方法,其实现过程是在测线衔接处求取同一个位置的两条测线的子波,选择一个子波为目标子波,另一个子波为被改变的子波,计算匹配算子,再把匹配算子作用于被改变的子波使其经过匹配后逼近目标子波,再利用其相关时差校正的办法让其消除系统时差。利用这种方法在新疆某地区二维拼接中取得了较好的效果,其结果证明了算法的正确性和有效性。

Along with oil and gas exploration areas continue to expand,the surface condition is more complex,different years construction,due to the excitation condition,geophone coupling and surface lithology at the different seismic wavelet to the time difference,frequency,phase and amplitude varying degrees of modification,make the wavelet produces a lot of differences,bring great difficulty in getting a big profile splicing processing.this thesis detailed introduces the wavelet matching combination of jet lag and related processing methods,the results prove the correctness and validity of the algorithm.