NDLI: Study of S-wave ray elastic impedance for identifying lithology and fluid

Content Provider	Springer Nature Link
Author	Gong, Xue Ping Zhang, Feng Li, Xiang Yang Chen, Shuang Quan
Copyright Year	2013
Abstract	In this paper, we derive an approximation of the SS-wave reflection coefficient and the expression of S-wave ray elastic impedance (SREI) in terms of the ray parameter. The SREI can be expressed by the S-wave incidence angle or P-wave reflection angle, referred to as SREIS and SREIP, respectively. Our study using elastic models derived from real log measurements shows that SREIP has better capability for lithology and fluid discrimination than SREIS and conventional S-wave elastic impedance (SEI). We evaluate the SREIP feasibility using 25 groups of samples from Castagna and Smith (1994). Each sample group is constructed by using shale, brine-sand, and gas-sand. Theoretical evaluation also indicates that SREIP at large incident angles is more sensitive to fluid than conventional fluid indicators. Real seismic data application also shows that SREIP at large angles calculated using P-wave and S-wave impedance can efficiently characterize tight gas-sand.
Starting Page	145
Ending Page	156
Page Count	12
File Format	PDF
ISSN	16727975
Journal	Applied Geophysics
Volume Number	10
Issue Number	2
e-ISSN	19930658
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-07-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	S-wave impedance ray parameter lithology identification fluid indicator Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences
Content Type	Text
Resource Type	Article
Subject	Geophysics

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