Construction of rock physics model is a significant and fundamental work in pre-stack inversion. In this paper, aiming at tight sandstone reservoir, we analyzed the main procedure of rock physics modeling. It is noteworthy that we combined well logging analysis and rock physics modeling as an iterative process, since logging data analysis is able to provide massive basic data to modeling while modeling is capable of controlling the quality of logging evaluation parameters. As we obtained high quality well logging data, the most sensitive parameters and optimal procedure of rock physics modeling has been selected, which help us to precisely predict the shear wave velocity and other reliable data for pre-stack inversion. Meanwhile, rock physics templates have been built up to interpret the inverted elastic velocity volume. This can improve the precision of identification for tight sandy reservoir. Finally, good results have been achieved in Erdos basin based on our raised method.%岩石物理建模是叠前反演前重要的基础工作.以致密砂岩储层为目标, 剖析了岩石物理建模涉及的主要过程.将测井评价与岩石物理建模视为迭代过程, 测井评价提供岩石物理建模的输入数据, 岩石物理建模控制测井评价参数的质量.在测井参数具有较高质量的情况下, 优选岩石物理建模方法, 优化关键参数, 较为准确地预测了横波速度等弹性参数, 为叠前弹性参数反演提供了可靠的基础数据.利用岩石物理解释模板对叠前反演纵横波速度体进行了解释, 提高了致密砂岩气层的识别精度, 在鄂尔多斯盆地取得了较好的应用效果.
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