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近年来,随着石油地球物理技术的不断发展和完善,使得利用地震信息中的频率衰减属性预测储层的含气性成为可能。针对松辽盆地庆深气田火山岩储层的特殊地质条件,利用基于模型的参量法估算地震频谱,通过对比穿过目的层前后有效频带中不同频率成分的衰减情况来定性分析目的层内部的流体分布,进而预测了庆深气田下白垩统营城组一段火山岩储层有利含气区的分布情况,其符合率可达85%,取得了良好的应用效果,实现了对火山岩含气性的有效检测。
In recent years, with the continuous development and improvement of petroleum geophysical technologies, it is possible to predict the gas-bearing of reservoirs by using the frequency attenuation attribute in seismic information. Aiming at the special geological conditions of volcanic reservoirs in Qinshen gas field of Songliao basin, the seismic spectrum was estimated by the model-based parametric method. The fluid distribution inside the target bed was qualitatively analyzed by comparing the attenuation of different frequency components in the effective band before and after the target bed , And then predicted the distribution of favorable gas-bearing area of volcanic reservoirs in the first member of Yingcheng Formation, Qingxu gas field with the coincidence rate up to 85%, which achieved good application results and achieved effective detection of gas-bearing volcanic rocks .