基于高分辨率瞬时信息与相干算法的低幅度构造识别

The identification technology of the low amplitude structure based on high resolution instantaneous information and coherence algorithm

随着勘探程度的深入,隐蔽圈闭,尤其是低幅度构造油气藏逐渐受到关注,其在地震资料上表现为反射同相轴平直且变化幅度很小,不易识别.利用相干算法识别低幅度构造,确定出了薄互层低幅度构造的空间展布;经过高分辨率复数道分析处理,提高了剖面分辨率,利用高分辨率瞬时振幅、相位、频率剖面的各自特性识别出了薄互层低幅度构造的构造异常点,此基础上再结合相干算法识别低幅度构造,精度更高.

As the deepening in the exploration extent, therefore, the focus has been shifted to the hard-to-find subtle traps, especially the exploration of the low-amplitude oil and gas reservoir. Due to its low amplitude, straightness in the reflection event and small varying amplitude are reflected in the seismic materials, with the structure hard to identify. Apply C1 coherence algorithm to the low amplitude structure, can determine the form of it. Through complex trace analysis of high resolution, improved the resolution, identified the thin interbed-low amplitude structure and improved the precision.