... formulation relative change saturation landrø porosity forward model seismic data time-lapse seismic data inversion p-wave velocity pressure change rock physics model saturation change approximation water saturation reservoir property variation reservoir characterization coefficient...

... apparent resistivity relative change horizontal component informativeness kolesnikov information magnetic field annual meeting vladimir kolesnikov resistivity upstream oil & gas seg international exposition territory amplitude reservoir characterization complex electrical survey...

...) impedance estimated from the uncertainty analysis. The results show that the 4D signals can be detected clearly when the time-lapse relative changes in P-impedance is significantly large (>8%), and the existing 2008 survey geometry is adequate for a baseline survey in areas with no gap in the coverage...

... that foundation (Maron et al., 2005; Cabolova et al., 2014). amplitude reservoir change thickness steam-assisted gravity drainage seismic response continuous seismic reservoir relative change reservoir temperature quantification transition temperature saturation fluid level rise reservoir...

... to seismic inversion and can be divided into two steps. First we estimate the conditional probability of elastic properties and their relative changes, then we estimate the posterior probability of static rock properties and dynamic property changes. We applied the proposed methodology to a synthetic...

... SUMMARY The nonlinearity of the seismic amplitude-variation-with-offset (AVO) response in the presence of large relative changes in acoustic and elastic medium properties is investigated with physical modelling data. A procedure for pre-processing reflection data, acquired using the CREWES...

... reservoir zone injection well discrimination amplitude storage exponent patchiness saturation cube rms amplitude relative change estimation Main Menu Time lapse pressure-saturation discrimination for CO2 storage at the Snøhvit field Sissel Grude*, Martin Landrø, NTNU and Bård Osdal, Statoil...

... saturation change spatial correlation saturation likelihood model relative change correlation machine learning information reservoir characterization gaussian distribution avo intercept gullfaks field Stochastic inversion of pressure and saturation changes from time-lapse seismic data. Helene...

... Summary An inversion method for time-lapse seismic data is presented. The input data for the inversion is time-lapse ratios of reflection coefficients and elastic parameters for the subsurface at the time of the reference survey. The output is relative changes in P-wave velocity, S-wave...

... Summary A joint inversion method for PP- and PS seismic data has been developed based on a least square estimation technique. The method should be more robust than inversion of PP-data or PS-data alone. The relative changes in P-wave velocity, S-wave velocity, and density were computed...

.... For comparison with the real data, a synthetic example was modeled based on well logs. thickness velocity analysis rms velocity sensitivity study relative change overpressured zone dataset reservoir characterization pore pressure increase machine learning seismic data pressure increase real...

... method is extended to wide angles. The AVO inversion is based on the exact Zoeppritz equation [Aki and Richards (1980)] describing angle dependent P-wave reflectivity. The inversion is parameterized in terms of relative changes in elastic properties and a background P- to S-wave velocity ratio...

... ABSTRACT No preview is available for this paper. relative change avo technique approximation detection equation geomodulus method reservoir characterization geophysics sin 2 gas oil reservoir position upstream oil & gas cdhdp group dhi ?tg 2 application threshold...

... ABSTRACT No preview is available for this paper. avo migration inversion inline depth migration pre-stack depth migration field data amplitude reservoir zone velocity model relative change procedure reservoir characterization constant depth upstream oil & gas...

... ABSTRACT No preview is available for this paper. reversal velocity model estimation correction inversion avo inversion estimation upstream oil & gas avo migration inversion reflection coefficient migrated cmp gather exact velocity model relative change class 2 synthetic...

... estimate ps reflectivity shear-wave velocity velocity model reflectivity information interface velocity section relative change Estimating shear-wave velocity from P-S seismic data Robert J. Ferguson * and Robert R. Stewart, The University of Calgary SI1.7 Summary A method to estimate S-wave...

... ABSTRACT No preview is available for this paper. shear wave velocity castagna gas sand avo response relative change reflection poisson upstream oil & gas shale variation sandstone han reservoir characterization modeling variation clay term hilterman cdp gather...

... ABSTRACT No preview is available for this paper. relative change incident angle amplitude pressure modulus p-wave velocity mechanical property inversion method reflection coefficient receiver algorithm gas saturation reservoir characterization upstream oil & gas shear...

... ABSTRACT No preview is available for this paper. vertical direction ray parameter relative change equation synthetic seismogram upstream oil & gas interface gas saturation reflection coefficient explanation amplitude seismogram geophysics wave equation propagation...

... ABSTRACT No preview is available for this paper. critical distance stability signature upstream oil & gas interaction reservoir characterization separation bubble period amplitude air gun air gun array gun depth characteristic relative change peak-to-peak amplitude...