地震道反演面临的问题与进展

doi:10.11743/ogg20020403

Abstract

Abstract:

Routine post-stack seismic trace inversion techniques are affected by many factors. It is difficult to gain satisfied results in practice. Possible reasons of causing wrong inversion results and interpretation pitfalls were analyzed in terms of main technique details of seismic trace inversion, chiefly concentrating on the aspects of noise, assumed conditions, w(t) extraction, transition of time and depth, low frequency component and restrained conditions etc. The concept of Elastic Impedance put forward by Patric Connolly has improved the reflectivity of normal incidence assumption which combines AVO problems and seismic trace inversion method in a skillful way so as to promote the seismic trace inversion method. Moreover, a model of Generalized Elastic Impedance established on this base suiting the routine post-stack, non-zero offset seismic data was put forward by us. Generalized Elastic Impedance which does not only include acoustic impedance but also include lithologic information of P and S-wave velocity. More accurate P and S-wave velocity and fluid, saturation, penetration information can be got by making a further study on joint P-wave and P-SV elastic impedance inversion. This is the new trend for seismic trace inversion.

Key words: acoustic impedance, pitfall, seismic trace inversion, elastic impedance, recursive formula

CLC Number:

P631.4

Ma Jinfeng, Xu Shenghui, Wang Guishui, Gao Le. PROBLEMS AND PROGRESS IN SEISMIC TRACE INVERSION[J]. Oil & Gas Geology, 2002, 23(4): 321-325.

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PROBLEMS AND PROGRESS IN SEISMIC TRACE INVERSION

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