叠前地震反演技术的进展及其在岩性油气藏勘探中的应用

Progress of pre-stack inversion and application in exploration of the lithological reservoirs

与叠后地震反演相比,叠前地震反演可得到更丰富的储层信息,可提高储层的描述精度.目前,叠前地震反演主要包括弹性阻抗反演、叠前P波阻抗和S波阻抗联合反演、叠前地震波形反演.文中概述了叠前地震反演各项技术的主要进展及其典型应用实例,提出了叠前地震反演技术在岩性油气藏勘探开发中的应用策略.叠前地震反演技术在未来的油气勘探开发中将有广阔的应用前景.

The pre-stack inversion can get more information of the reservoir and improve precise of reservoir characterization than the post-seismic impedance inversion. The pre-stack inversion mainly include the elastic impedance inversion, Pre-stack simultaneous inversion for compressional impedance and shear impedance ,and pre-stack waveform inversion. The paper summarizes the key techniques of the pre-stack inversion and its characterization of application, gives the some of t typical cases study, put forward the strategy of the pre-stack inversion in exploration and production for the lithologiccal reservoirs. In the future it will have a wide application in different aspects of reservoir characterization and pre-drill geo-hazard analysis.