运用高分辨率地震资料处理技术识别薄储层及微幅构造

Application of high resolution seismic data processing technique to identify thin reservoir and low amplitude structure

为了识别薄储层、微幅构造、小断层等小尺度地质体,本文研究了以保护和提高地震资料高频成分信噪比为基础的提高分辨率处理技术,分别在叠前和叠后有效压缩子波、拓宽地震资料的频带,提高了地震资料的分辨率。在胜利探区永新工区地震资料处理中的应用结果表明,成果剖面的弱反射层次清楚,微幅构造成像清晰,地质信息丰富,勘探目的层的主频由原来的20～23Hz提高到46～50Hz,对提高地震数据的处理质量,解决陆相薄互层油气藏的微幅构造成像问题非常有效。

In order to identify the thin reservoirs,the low amplitude structures,the small faults and the small scale geological bodies in the reservoir development,the high resolution technique which is aiming at protecting and raising the signal to noise ratio for the high frequency component was studied in this paper.With the technique the wavelet can be effectively compressed for post-stack data and pre-stack data,the frequency band can be expanded so the seismic data resolution can be raised.The application of the technique in the seismic data processing in Yongxin Block of Shengli exploration area show that the seismic resolution was raised,weak reflection became clearer,better imaging quality was achieved for the low amplitude structures,richer geological information were seen,and the main frequency of the exploration target was raised from 20～30Hz to 46～50Hz,the technique is very effective for raising the seismic data processing quality and resolving the imaging problem for the low amplitude structures in the terrestrial thin interbed reservoir.