AVO处理解释和岩性识别

AVO PROCESSING、 INTERPRETATION AND LITHOLOGY IDENTIFICATION

从AVO技术最初用于识别"亮点"等振幅异常开始,特别是近几年来新科技的发展和应用,使该技术在油气勘探领域中具有不可替代的作用。用AVO拟合的纵横波、梯度、近道和远道迭加等剖面,结合AVOC、AVO偏振性分析、交汇图、流体替换、声阻抗、波阻抗、LMR等技术,可以从地震剖面中提取与地层直接相关的岩石物理参数,如λ、μ、K、σ等,进而预测储层的岩性和含流体性。在对这些技术进行了详细的研究后,用实际资料对每一种方法进行验证,总结了一套适用于碳酸岩储层的岩性识别处理解释流程。

Amplitude versus offset(AVO) techniques now has an irreaplaceable position in the area of oil and gas exploration since it's first time use in detection of amplitude such as 'Bright Point' etc., especially the application and development of the new technology these years. Combining with techniques of AVOC? AVO polarization? CrossPlot? Fluid Replacement Model? AI and EI Inversion? LambdaMuRho(LMR) etc and using Pwave? Swave? Gradient? near and far angle stack, we can extract the rocks and fluids physics parameter(λ? μ? K? σ etc) directily from the seismic profile, then predict the reservoir rock and fluid saturation characteristics. In the article we give some case study, and then propose a rock identification flow chart for carbonate reservoir.