薄砂岩储层的地震反演预测研究

Seismic Inversion Prediction Research of Thin Sandstone Reservoirs

由于地震资料调谐效应的影响,薄砂岩储层的分布范围及储层物性特征不能在地震资料上得到真实反映,同时,地震资料常规反演方法及流程难以对薄砂岩储层实现有效预测。因此针对这种情况,提出了一套优化的地震反演流程,有效实现了对薄砂岩储层分布范围及储层物性特征的预测。首先进行储层特征反演,得到反演数据体,在反演数据体上直接解释薄砂岩储集层,得到高分辨率的砂岩储集层空间展布形态;其次在拟声波反演时使用储层特征反演的解释成果进行约束建模,提高了拟声波反演体对薄砂岩储层中物性特征的分辨能力,实现了对储层物性特征的预测。

Due to seismic data’s tuning effect, distribution range and physical characteristics of thin sandstone reservoirs can not be reflected the true on seismic data. At the same time, applying the conventional inversion methods and technological process of seismic data can hardly work in prediction of thin sandstone reservoirs. Ac-cording to this situation, we create an optimized seismic inversion process, with which distribution range and physical characteristics of thin sandstone reservoirs is predicted effectively. First, get inversion data volume by doing reservoir characteristics inversion, then explain thin sandstone reservoirs according to the data volume, thus you will get thin sandstone reservoirs’distribution range with high resolu-tion. Second, doing constraint modeling by application of explaining results of reservoir characteristics inversion during pseudo-acoustic inversion, that helps improving pseudo acoustic inversion volume’s ability to distinguish thin sandstone reservoirs’physical characteris-tics. And finally prediction is achieved.