... elastic moduli clay mineral structural geology shale assumption fraction smectite elastic property porosity brine saturation background medium axial stress contact moduli moduli iso-frame value upstream oil & gas reservoir characterization fluid saturation shear modulus...

... ratio (SNR) condition. Both the characteristic relaxation frequencies of the real part and imaginary part can be effectively used to evaluate the brine saturation and confining pressure of core samples. Introduction IP of rock is caused by the complex electrochemical action between the rock and the pore...

... is then straightforward. Acoustic properties of the partially CO2 - brine saturated rock We consider that a volume of carbon dioxide VCO2 occupies part of the pore volume Vp of a geologic reservoir which at the pre-injection state was fully saturated with brine. For simplic- ity we assume that CO2 displaces, without...

... in the pores. This latter analysis has potential application for enhanced oil recovery monitoring: a change in Q might contain valuable information about a change from oil to brine saturation, and could be used as an additional seismic attribute. When estimating attenuation from surface seismics, Q is assumed...

... Summary Deformation resulting from a compressional wave can cause pore fluid motion on the order of the wavelength. If the fluid mobility is high, pressure can be equilibrated between regions of gas versus brine saturation. This can result in a relaxed, drained velocity even lower than dry...

... Summary We have tested the application of respectively the Kuster- Toksöz and the Gassmann theory as a tool for predicting pore fluid from the elastic properties of brine-saturated North Sea reservoir chalk. We confirm that the Kuster-Toksöz model predicts a larger fluid effect than...

... seismic frequency measurement university research center frequency range colorado school houston fluid mobility reservoir characterization permeability brine saturation frequency velocity dispersion saturation pore fluid attenuation mechanism upstream oil & gas geophysics...

... seismic measurement upstream oil & gas brine saturation imbibition reservoir characterization Heimdal monitoring I: Establishing feasibility from cores and logs Diane L. Jizba* and Dominique P. Marion, Elf Aquitaine Production, France DP4.4 SUMMARY INTEGRATED APPROACH This paper presents...

... frequency fluid dynamics imbibition diameter attenuation boundary condition columbia univ brine saturation Fluid Saturation Effects on Extensional Wave Attenuation C-S. Yin*, Columbia Univ.; M. L. Batzle and B. J. Smith, ARC0 Oil and Gas Co. SLl.4 SUMMARY Extensional wave attenuation (1IQe...