Earthquake CRP gather amplitude compensation method and system oriented to prestack inversion

The invention relates to an amplitude compensation method and system for a seismic CRP gather oriented to prestack inversion. The method comprises the following steps: acquiring an AVO forward trace gather of a real drilling well by using acquired logging data, and determining top and bottom mark re...

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Bibliographic Details
Main Authors LI NINGCHAO, MEI BING, ZHANG KUANG, LIAN FUMING, WANG DEBO, WEI YARONG, PENG JUN, LI JIDONG
Format Patent
LanguageChinese
English
Published 28.04.2023
Subjects
DETECTING MASSES OR OBJECTS
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
MEASURING
PHYSICS
TESTING
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Summary:The invention relates to an amplitude compensation method and system for a seismic CRP gather oriented to prestack inversion. The method comprises the following steps: acquiring an AVO forward trace gather of a real drilling well by using acquired logging data, and determining top and bottom mark reflecting layers; determining an effective incidence angle range of each mark reflection layer of the seismic CRP gather through AVO response characteristics, thereby obtaining a gradient of an AVO fitting equation; dividing a seismic CRP gather into a plurality of sub-gathers according to an incidence angle range to determine a target incidence angle range, taking a gradient as a known quantity to obtain an intercept to obtain a target AVO fitting equation, obtaining an amplitude compensation coefficient corresponding to each mark reflection layer by using a theoretical amplitude value and an actual amplitude value obtained by the target fitting equation, and calculating the amplitude compensation coefficient of ea
Bibliography:Application Number: CN202111250501