摘要
储层勘测中地震波速度一般低于声波测井速度,撇开观测系统与人为因素造成的误差,岩石本征的黏弹性是造成这一现象的重要原因.本文在井、震匹配问题中引入了黏弹性岩石的杨氏谐振品质因子(Q)模型,对储层岩石进行了井震匹配与Q反演.文章阐述了如何通过谐振Q模型合理的校正声波速度,从而实现井震匹配.在波形匹配的基础上,进行地层品质因子的反演,合理的计算出目的层位的品质因子值.
Wave velocity observed in seismic shot gathers is usually lower than that in sonic logs for the same reservoir rocks. Neglecting the effects of observation system and artificial factors, the intrinsic viscosity in rocks causes waves to disperse between different frequency bands. Yang＇s resonance quality factor （Q） model for viscoelastic rocks is introduced to analyze the match problem for seismic log data and inverse Q parameters in reservoir rocks. The paper demonstrates how to use a resonance Q model to reasonably correct the log-observed velocities, so as to obtain a good agreement between seismic and log data. On the basis of the match of waveforms, the sub-layer quality factors are calculated.
出处
《地球物理学进展》
CSCD
北大核心
2012年第1期288-295,共8页
Progress in Geophysics
基金
国家科技973项目(2007CB209505)
国家科技重大专项(2008ZX05004-006)
国家自然科学基金项目(41104066)
中国石油天然气集团公司“十二五”基础研究项目(2011A-3601)
中国石油勘探开发研究院中青年创新基金(2010-A-26-01)联合资助
关键词
Q模型
波速
频散
校正
Q model, wave velocity, dispersion, correct
