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黄土塬地区进行的煤田三维地震勘探中,往往受到各种复杂条件的限制,使野外地震记录信噪比非常低,寻找一个适合该地区的地震数据综合处理技术非常重要.以山西省某煤田黄土塬区野外采集的三维地震数据为基础,针对黄土塬地区的覆盖层厚度变化剧烈、地形起伏变化大和煤层埋藏深度浅的特点,采用除了常规的三维地震处理流程之外,重点采用炮偏校正建立三维空间属性,合适的静校正参数和预测反褶积处理技术,利用高精度多次速度分析和三维一步偏移技术等处理措施,使得处理后的地震记录品质和分辨率均得到提高,为地震数据的解释奠定了基础.
In the three-dimensional seismic exploration of coalfields in the Loess Plateau, it is often constrained by various complicated conditions so that the signal-to-noise ratio of the field seismic records is very low. It is very important to find an integrated seismic data processing technique suitable for this area. Based on the 3D seismic data collected in the field, aiming at the characteristics of the drastic change of the cover thickness in the Loess Plateau, the large fluctuation of the terrain and the shallow burial depth of the coal seam, the conventional three-dimensional seismic processing flow was adopted. Three-dimensional space attributes, suitable static correction parameters and predictive deconvolution techniques are used to improve the quality and resolution of seismic records after the treatment with high precision multi-speed analysis and three-dimensional one-step migration techniques. Data interpretation laid the foundation.