复杂探区综合静校正技术的应用

The application of the comprehensive static correction technology in complex areas

复杂地区地表结构复杂,表层速度和厚度呈现非均质性的特点。随着勘探工作的深入和勘探地区的复杂化,静校正问题变得越来越突出,甚至严重地困扰了地震采集工作的开展。为了大幅度地提高复杂探区的地震资料处理成果精度,满足精细油气藏勘探的需求,笔者针对复杂探区表层结构的多解性、表层吸收衰减的严重性、资料的信噪比和分辨率低、成像困难等勘探难点,开展了大量的静校正方法攻关研究,形成了基于单炮初至折射波的高低频分离和综合静校正技术。通过应用,地震资料的信噪比得到大幅度提高,成像效果好,解决短波长问题的同时,较好地解决了长波长问题,取得了良好的勘探效果。

Surface velocity and thickness show heterogeneity in complex areas. With the increasingly deep exploration and the complexi-ty of the surveyed areas, static correction problems become more and more prominent and even seriously trouble the seismic acquisition. In order to greatly improve the data quality and imaging precision in the complex seismic exploration areas and meet the needs of the fine oil and gas accumulation exploration in these complex exploration areas characterized by multiple solutions of the surface structure, serious surface adsorption attenuation, low S/N ratios and resolutions and difficult imaging, the authors carried out detailed studies of the statics method based on the FBT of a single source, performed the high and low frequency static separation and integrated the static correction technology. The application of the statics technology shows that S/N can be greatly improved, and good imaging effects can be obtained. The technology can solve not only short wavelength problems but also the long wavelengths problem, thus achieving good exploration results.