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Information Seminar Paper

Title

SEISMIC IMPEDANCE INVERSION IN COMPLEX STRUCTURES

Pages

  -

Abstract

 ACOUSTIC IMPEDANCE (AI) INVERSION ALLOWS MAPPING THE SEISMIC REFLECTION DATA TO LITHOLOGY AND HENCE IT PLAYS AN IMPORTANT ROLE IN RESERVOIR CHARACTERIZATION AND INTERPRETATION OF POST-STACK SEISMIC DATA. THE AI IS OBTAINABLE FROM THE INVERSION OF THE EARTH REFLECTIVITY SERIES. EFFICIENT DECONVOLUTION METHODS HAVE BEEN DEVELOPED FOR RECOVERING THE REFLECTIVITY SERIES FROMBANDLIMITED POST-STACK DATA. HOWEVER, THE EXISTING AI INVERSION METHODS OFTEN ARE UNSTABLE.SPECIFICALLY, THEY FAIL TO GENERATE AN ACCEPTABLE IMPEDANCE MODEL WHEN DEALING WITH COMPLEX STRUCTURES BECAUSE OF PROCESSING THE DATA IN A SINGLE CHANNEL SCHEME. CALCULATION OF THE AI FROM THE REFLECTIVITY, WHEN CONSIDERING THE SPATIAL CORRELATION OF THE IMPEDANCE PARAMETERS, DEMANDS SOLUTION OF A CONSTRAINED NONLINEAR INVERSE PROBLEM.IN THIS PAPER, I PROPOSE AN EFFICIENT ALGORITHM FOR SOLVING THE NON-LINEAR IMPEDANCE PROBLEM IN MULTICHANNEL FORM WITH THE TOTAL-VARIATION (TV) CONSTRAINT IN ORDER TO RECOVER IMPEDANCE MAPS WITH BLOCKY STRUCTURES. THIS ALLOWS STABILIZING THE IMPEDANCE MODELS EVEN IN VERY COMPLEX STRUCTURES. NUMERICAL TESTS USING TWO- AND THREE-DIMENSIONAL FIELD DATA CONFIRMED THAT THE PROPOSED ALGORITHM GENERATES MORE ACCURATE WITH HIGHER RESOLUTION IMPEDANCE MODELS COMPARED WITH THE CONVENTIONAL METHODS WHICH ARE CURRENTLY USED IN THE INDUSTRY.

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    • Cite

    APA: Copy

    GHOLAMI, ALI. (2015). SEISMIC IMPEDANCE INVERSION IN COMPLEX STRUCTURES. SEMINAR PETROLEUM GEOPHYSICAL EXPLORATION. SID. https://sid.ir/paper/924447/en

    Vancouver: Copy

    GHOLAMI ALI. SEISMIC IMPEDANCE INVERSION IN COMPLEX STRUCTURES. 2015. Available from: https://sid.ir/paper/924447/en

    IEEE: Copy

    ALI GHOLAMI, “SEISMIC IMPEDANCE INVERSION IN COMPLEX STRUCTURES,” presented at the SEMINAR PETROLEUM GEOPHYSICAL EXPLORATION. 2015, [Online]. Available: https://sid.ir/paper/924447/en

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