Prediction of Elastic Rock Properties Using Extended Elastic Impedance Inversion
H. Kim, G. Lee, S. Moon and H. Kim
Event name: 77th EAGE Conference and Exhibition 2015
Session: Geophysical Analysis and Reservoir Geophysics
Publication date: 01 June 2015
Info: Extended abstract, PDF ( 1.74Mb )
Price: € 20
Extended elastic impedance (EEI) is an extension of elastic impedance (EI) which is a generalization of acoustic impedance (AI) for nonzero angles of incidence and can be tuned to be proportional to reservoir properties. In this study, we estimated the P- (Vp) and S-wave velocities (Vs), P-wave to S-wave velocity ratio (Vp/Vs), and Poisson’s ratio of the Second Wall Creek Sand of the Teapot Dome field, Wyoming, USA, using the EEI inversion technique. Data used in the study include 3D prestack seismic data from the southern part of the field and four wells, selected from a large well database. Vs logs at the wells were constructed from Vp logs using the empirical relationships. The percent prediction errors for the four velocity properties are less than about 5% except for Poisson's ratio at one well, supporting that the EEI inversion can be used in prediction of rock properties.