The impact of small faults on seismic impedance inversion

K. Xiang*, E. Landa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Impedance inversion is one of the most efficient tools to predict and characterize oil and gas reservoirs. Small faults have the ability to reveal the high-resolution information on the target reservoir. However, the impedance information of small faults is always hidden during standard inversion process. Instead, diffracted wavefield indicate high-resolution information beyond reflected wavefield, yet it is biased by reflection-oriented migration. Usually, in the standard inversion scheme, the input is the migrated data and the impedance of small faults is distorted. Therefore, a novel approach is proposed to improve impedance inversion results using the unmigrated data and diffracted wavefield. The input data for inversion is a zero-offset section with identified diffraction events. Forward modelling, designed for the impedance inversion, includes the classical specular reflection plus asymptotic diffraction modelling schemes. A synthetic model, with the fault of half of the wavelength, shows the validation of this novel approach to improve the resolution and accuracy of impedance inversion.

Original languageEnglish
Title of host publication81st EAGE Conference and Exhibition 2019
PublisherEAGE Publishing BV
ISBN (Electronic)9789462822894
StatePublished - 3 Jun 2019
Event81st EAGE Conference and Exhibition 2019 - London, United Kingdom
Duration: 3 Jun 20196 Jun 2019

Publication series

Name81st EAGE Conference and Exhibition 2019


Conference81st EAGE Conference and Exhibition 2019
Country/TerritoryUnited Kingdom


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