中国西部复杂地区地震资料处理

针对戈壁、沙丘地区地震资料的特点,通过对原始资料进行质量控制、高通滤波、倾角滤波、野外静校正、地表一致性反褶积、精细速度分析、叠前去噪、剩余静校正多次迭代、叠后去噪和偏后修饰等处理,提高了低信噪比地区地震剖面的资料质量,摸索出了一套戈壁、山前、沙丘等复杂地区地震资料处理技术。通过对青海、新疆地区资料进行实际应用,证明该资料处理技术实用可靠,效果显着。

THE PROCESSING OF SEISMIC DATA FOR WESTERN CHINA COMPLEX AREAS

In view of characteristics of seismic data of gobi sand dune areas, this paper, through various data processing means such as quality control, high pass filltering, dip angle filltering, field static correction, surface consistency deconvolution, precise velocity analysis, denoising before stack,multiple iterative operation of residual static correction, denoising after stack and modification after shift, has raised the data quality of seismic profiles in low signal to noise ratio areas and managed to form the seismic data processing technique for such complex areas as gobi, foreland and dune. Practical application of data from Qinghai and Xinjiang proves this data processing technique to be reliable and effective.