叠前谱蓝化提频技术在乍得Baob油田储层预测中的应用

乍得Baob油田储层非均质性强，砂体变化快，由于原始地震资料分辨率低、井震相关性较差，造成砂体间隔层识别及岩性边界识别难度较大。针对此问题，在资料处理过程中采用叠前谱蓝化提频技术，以测井反射系数频谱和道集正演模型频谱的趋势作为目标，恢复叠前地震道集数据中衰减严重的高频能量，在有效频带范围内最大程度地提高地震数据的分辨率，同时运用井震相关度定量质控处理结果。经过提频处理，地震资料的分辨率、井震相关性及对薄层的识别能力均有所提高。在乍得Baob油田应用实例表明，叠前谱蓝化提频处理技术为精细刻画该区储层及隔层的展布提供了高分辨率和高可靠性的基础数据。

Pre-stack spectrum blueing frequency increasing technique: A case study on reservoir prediction in Chad Baob Oilfield

In Chad Baob oilfield, the reservoirs are very heterogeneous,and the sand bodies change rapidly.Seismic data with low resolution and poor well-to-seismic correlation make it much difficult to identify the thin interlayers and delineate the lithology boundary.To solve the problem,the pre-stack spectrum blueing frequency increasing technique is applied to processing procedure.Taking the spectrum trends of the well logs and gathers' forward model as the target,the high frequency energy with serious attenuation in prestack data is recovered,and the resolution of seismic data is improved to the greatest extent within the effective frequency band range.At the same time,the well-to-seismic correlation degree is used to quantitatively control the processing results.The resolution of seismic data, well-to-seismic correlation and the recognition ability of the thin layer are improved by using the method.The application in Chad Baob oilfield shows that the pre-stack spectrum blueing frequency increasing technique provides seismic data with high resolution and high reliability for thin interlayer recognition and reservoir characterization.