Abstract:

 In recent years, seismic wave impedance inversion method plays an important role in reservoir prediction，which are the primary technology to ensure the proper integration of seismic data, well-logs, velocity and geological information. In this paper, we have overall analyzed and contrasted of the key technology and applicability of five types seismic wave impedance inversion methods commonly used in petroleum industry. Existing wave impedance inversion methods have different applicability, and there are the problems of seismic oil reservoir prediction due to the restriction of seismic data quality, geological condition, exploitation degree. These problems could not be preferably solved. Furthermore, we presented a thought for seismic inversion called three stages and nine steps inversion method. With this method, the good effects of appliance are acquired in exploration deployment and reserve evaluation of PTH oil layer in GLB of Songliao basin, and 1-2 m thin reservoir could be predicted. This method has some significances for reference to prediction of the thin reservoirs with similar geological conditions in China.

Key words: seismic wave impedance, reservoir prediction, three stages and nine steps inversion method, geological information, integrated application