MULTIPLE ROOTS IN WELLRESTRICTED IMPEDANCE INVERSION

Ma Jinfeng; Wang Xuejun; Zhong Jun; Xu Yajun

doi:10.11743/ogg19990102

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MULTIPLE ROOTS IN WELLRESTRICTED IMPEDANCE INVERSION
Vol. 20, Issue 1, Pages: 7-10(1999)
Online First：25 March 1999，

Published：1999
DOI： 10.11743/ogg19990102
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DOI：

Ma Jinfeng, Wang Xuejun, Zhong Jun, et al. MULTIPLE ROOTS IN WELLRESTRICTED IMPEDANCE INVERSION[J]. 1999, 20(1): 7-10. DOI： 10.11743/ogg19990102.

摘要

测井资料约束的波阻抗反演技术

是一种建立于褶积模型基础之上的波阻抗反演技术

由于人们对这种方法的理论基础认识不清

片面地认为使用该方法可以获得高分辨率的波阻抗剖面或对地震资料进行提高分辨率处理。通过理论模型试算

证明波阻抗约束反演中存在着多解性问题

表明地震道之间的相似性

并不能代表反射系数序列或波阻抗序列的相似性。在实际资料处理中

不能采用将合成地震记录与实际地震记录剖面对比

求取相关系数的方法来进行高分辨率波阻抗反演和提高地震剖面分辨率的处理。

Abstract

Log datarestricted wave impedance inversion technique is based on convolutional model.Because of misunderstanding its theory foundation

this method was misused to obtain high-resolution impedance profile or to improve seismic profile resolotuion.The theoretic modeling results of log data-restricted wave impedance inversion indicate that seismic inversion result has multiple roots.The similarity between seismic tracs does not mean the similarity between impedance series or reflection coefficient series.Coherent coefficient obtained from comparing synthetic seismic profile with original seismic profile can not be used as restricted condition to invert highresolution impedance profile or to improve seismic profile resolution in practical seismic data processing.