各项异性叠前时间偏移在深地震反射剖面中的应用

实际地下介质广泛存在各向异性,应用常规的各向同性的偏移方法来进行各向异性介质的偏移处理会产生误差,不利于提高成像效果和精度,最终影响地质解释.针对HB地区深反射地震资料的特点,采取了高精度静校正、叠前保幅去噪和子波一致性处理等一系列有针对性的处理技术,提高了资料的信噪比及成像质量,在此基础上开展各项异性叠前时间偏移技术的应用研究,取得了良好的应用效果,为后续的地震解释、地质研究提供比较真实可靠的证据.

The Application of Anisotropy Prestack Time Migration to the Deep Seismic Reflection Profile

Since the anisotropy exists extensively in the real underground medium, it will produce errors when using routine method to process the anisotropy migration, which can not improve the imaging effect and precision. Thus, the geological interpretation will be in- fluenced. According to the features of deep reflection seismic data in the HB region, it has taken series of targeted processing methods to improve noise-signal ratio of seismic data and imaging quality, such as high precision statics, prestack amplitude-preserved noise attenua- tion and wavelet coherence processing and so on. On that base, it also has taken the apply- ing research on anisotropy prestaek time migration, which has achieved good application effect and provided true and reliable evidence for further seismic interpretation and geolog- ical research. Key words：