西部地震资料主要处理技术研究

西部地区地表情况多样,资料品质较差,多属低信噪比资料。这对类资料,静校正叠前去噪及速度分析等技术是非常重要的基础工作。针对西部地区不同的资料采用相应的静校正方式,在叠前去噪方面,就FK域倾角滤波方法的应用上进行了改进,克服了该方法一些“蚯蚓化”、“假构造”等弊端,总结出一套切实可行的尤其是用于西部资料的去噪方法。并针对多次波的特点,采用时间域,频率域及τp域等多种方式进行多次压制,在西部资料的处理中取得了较好的效果。

Studying of the Primary Processing on Western Seismic Data

Surface condition is very complex in western area, data quality is bad, most western data is low signal to noise ratio seismic data. To this kind of seismic data, static correction, pre stack noise attenuation and velocity analysis are very important fundamental work status. We adopt accordingly the style of static correction in accordance with the different data in western area, and on the pro stack noise attenuation, we improve the applied method of dip angle filtering in F-K domain, overcome the abuses, such as "wormnization", "false structure" and summarize asset of feasible realistic noise attenuation methods especially adapting to the western data. Aiming to the characters of the multiple wave, we also process multiple attenuation in many ways include in time domain, frequency domain and radon transformaion. Through processing the western data, the good result was achieved.