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应用地震地层学理论和方法,结合露头和钻井资料,通过合成地震记录进行层位标定,将安岳—潼南地区须家河组划分为4个三级层序。建立了丘状和上超充填2种地震相模式。根据地震反射单元内部结构、外部形态、反射波终止类型、频率、振幅、连续性和层速度等多项地震参数,识别出平行—亚平行、丘状、充填、前积等5个大类地震相和亚平行波状变振幅低连续、上超充填等8个亚类地震相。利用过井地震剖面建立地震相与沉积相、测井相对应关系,分析地震相地质意义,预测了有利储集相带的分布。
Based on the theories and methods of seismic stratigraphy, combined with outcrop and drilling data, the stratigraphic calibration is made through synthetic seismogram, and the Xujiahe Formation in Anyue-Tongnan area is divided into four third-order sequences. Two types of seismic facies models, mound-shaped and over-filled, have been established. According to the seismological reflection unit internal structure, external morphology, the type of the end of reflected wave, frequency, amplitude, continuity and velocity of the earthquakes and other seismic parameters, identified five parallel sub - parallel, mound, filling, Eight sub-types of seismic facies, such as low-continuous amplitude of sub-parallel undulations and sub-ultra-filling. By using the cross-section seismic profile, the relationships between seismic facies, sedimentary facies and well logging are established, the geological significance of seismic facies is analyzed, and the distribution of favorable facies belts is predicted.