Abstract: The inversion technique of wave impedance has successfully been employed in the prediction of eight reservoir sandstone beds within the Baozhong block, Baolang oil field, Yanqi Basin, Xinjiang. The technique is mainly developed on the basis of well logs, especially the constraints on the well logs. Therefore the results of inversion obtained have higher resolution and reliability. The distribution of sandstone bodies may well be delineated with the aid of this method, and thus the risks on exploration and exploitation may be decreased to the least degree.