In order to eliminate the influences of different geophone offsets and different incident angles on the seismic amplitude characteristics in seismic data, from the viewpoint of the wave impedance relations between the seismic reflection coefficients and geological interfaces, according to the characteristics of relatively flat stratigraphic structures in study area, the method of the narrow incident angle imaging is established in the light of the flat layers. Through the incident angle calculation, incident-angle band generation and common incident-angle imaging, the high-precision seismic data bodies are got with obvious heterogeneity characteristics of the reservoirs. Compared with the original processed results, the fact show that the narrow incident-angle imaging is characterized by the clear lithology boundary and distinct spread property of channel sandbody along the seismic attributes of the formations, and furthermore the achievements stated above are identical with the results of the geological study. This method possesses much better application prospects for the region with relatively flat reservoir structural configuration.%为了消除地震资料中不同炮检距、不同入射角信息对地震振幅特征的影响,从地震反射系数与地质界面的波阻抗关系出发,根据研究区地层构造相对平缓的特点建立了针对平缓地层的窄入射角成像方法,通过入射角计算、入射角带生成和共入射角成像得到了储层非均质特征明显的高精度地震数据体.与原处理成果对比结果表明,窄入射角成像结果岩性边界清晰,沿层地震属性河道砂体展布特征明显,与地质研究成果更加吻合.该方法对于储层构造形态相对平缓的地区具有较好的应用前景.
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