摘要
基于模型的常规地震反演方法,利用声速或密度测井曲线进行约束从而获得波阻抗信息。但是,当目的层与围岩的波阻抗差异很小时,根据波阻抗信息很难解决层位对比问题。实际上,视电阻率、自然伽马等测井曲线可以提供其他的地层岩性信息,利用多参数进行约束反演对区分岩性更加敏锐。双测井曲线融合法将密度和视电阻率测井曲线融合、变换后得到一条拟密度曲线,该曲线同时突出了煤层与岩浆岩的密度和电阻率异常。利用该曲线进行约束,可以实现多参数岩性反演。
The method of model-based seismic inversion makes use of sound velocity logging or density logging constrains to get wave impedance inversion information.However,when the difference between the purpose layer and the surrounding rock is small,it is difficult to solve the problem of layer contrast through the information.In fact,apparent resistivity and artificial gamma logging can provide lithological information of other strata.The inversion constrained by multiple parameters has more acute effect in distinguishing lithologic characters.The method of double logging curve fusion makes use of two different logging curves to fuse and transform into a imitated density curve,which can highlight the density anomaly of coal and magmatic rocks at the same time.Multiple parameters lithological inversion can be realized by the imitated density curve constraint.
出处
《物探与化探》
CAS
CSCD
2013年第1期104-107,共4页
Geophysical and Geochemical Exploration
基金
国家自然科学基金项目(40874054)
中央高校基本科研业务专项资金项目(2010ZDP01A07)
关键词
岩性反演
测井曲线融合
拟密度
岩浆岩
lithological inversion
logging curve fusion
imitated density
magmatic rocks
