一种地震资料高分辨率处理流程

A SCHEME FOR HIGH RESOLUTION SEISMIC DATA PROCESSING

四川石油管理局地调处,成都610212

Gelolgic Survey Division, Sichuan Petroleum Administration, Chengdu 610212

常规地震勘探中所采集的有效反射波的频带是很宽的,但资料处理的结果使有效波主频带变窄,因而剖面的分辨率表现很低.用反褶积技术来提高有效波的主频带宽度又常常使分辨率和信噪比二者不可兼得.为此,本文提出一种地震资料高分辨率、高信噪比和高保真度的三高处理流程,采取将谱均衡和去噪模块形成迭代处理的方式,在确定的信噪比目标下可以同时有效地提高资料的分辨率和信噪比,从而达到最大限度地利用野外原始资料的目的.

The frequency band of the reflections acquired in conventional seismic surveys is very wide, but data processing often narrows it and thus reduces the resolution of seismic sections. Dcconvolution technique is helpful to restore it but at the sacrifice of signal-to-noise ratio (SNR) . The paper presents a seismic data processing scheme featuring high resolution, high SNR, and high fidelity, in which cither spectrum equalization and noise elimination are implemented in iterative way such that the resolution and SNR can be simultaneously improved, and thus makes it possible to exploit field raw data as much as possible.