..., the extended Gassmann equation is dynamic volumetric strain (DVS) into the classical capable of simulating the dispersion and attenuation Gassmann equation. Through analyzing the physical essence behaviors of heterogeneous rocks simultaneously including of the wave-induced fluid pressure relaxation mechanism...

... Summary By integrating Gassmann equations with the DEM analytical model of dry-rock frame derived from the differential effective medium theory, this paper presents a method for pore structure evaluation and shear wave velocity prediction from the effective pore aspect ratios inverted from...

.... We have also argued that the shear modulus of kerogen is around half of the bulk modulus. grain density rock physics lab upstream oil & gas saturation effect kerogen fuyong yan sensitivity analysis gassmann equation pore fluid university reservoir characterization elastic property...

... a new fluid substitution method of carbonate rocks using Gassmann equation and Eshelby-Waslsh theory (GEW) in this paper. Then, we discuss how to calculate the moduli of carbonate rocks’ solid matrix and the effect of pore geometry on fluid substitution with rock samples. Finally, we make a fluid...

... equation. The effective porosity for Gassmann equation should be frequency-dependent. Knowing the pore geometry, if an empirical correlation between frequency and threshold pore throat size or NMR T 2 is set up, Gassmann equation can be applicable to data of any frequency measurement. Without information...

... change gassmann equation stiffness equation theoretical validation upstream oil & gas pore space Theoretical validation of fluid substitution by Hashin-Shtrikman bounds Fuyong Yan*, De-hua Han, Rock Physics Lab, University of Houston Summary In this study, we find that variation of Hashin...

... log analysis well logging estimation water saturation reservoir characterization gassmann equation fluid saturation effect log data exact gassmann equation p-wave velocity approximate gassmann equation fluid substitution castagna shear wave velocity equation upstream oil & gas...

... also investigated validity of the Gassmann equation for predicting velocity changes. We combined the laboratory measurement results to obtain a sequential rock physics model that can predict the velocity changes induced by the steam injection. Introduction One of the most effective methods...

... for quantitative interpretation of the changes in seismic response due to alterations in reservoir properties during production. Seismic fluid substitution modelling using Gassmann equation has become routine in the analysis and interpretation of seismic velocities and amplitudes. Given pore, frame, and fluid...

..., hyaloclastites and basalts, at in-situ reservoir conditions has been done to identify the role of temperature on the seismic velocity and attenuation. The goal is to establish a temperature-dependent fluid substitution analysis of geothermal rocks using Gassmann equation within the framework of Biot s...

... in the porosity of the medium and is performed for dry and fluid-saturated pores. The synthetic results are compared with the predictions of the well known Gassmann equation and the Biot velocity relations. Although we have a very low porosity in our models, the numerical calculations showed that the Gassmann...

... Summary This paper is concerned with numerical considerations of the Gassmann equation. The focus is on effective velocities in different kinds of dry and fluid-saturated fractured media. We apply the so-called rotated staggered finite-difference grid (RSG) technique. Using this modified...

... reservoir characterization thomsen background porosity fracture characterization elastic property gassmann equation ti medium bulk modulus fracture compliance compliance equation expression porous rock Elastic properties of saturated porous rocks with aligned fractures Boris Gurevich, Curtin...

... conditions water saturation gassmann equation depth interval upstream oil & gas shear modulus porosity irreducible water saturation water saturatiom gpa clay content reflection calcite Elastic moduli of chalk as a reflection of porosity, sorting, and irreducible water saturation Ida L...

... Summary Time-lapse seismic monitoring of reservoirs relies on changes in fluid saturation and pressure due to petroleum reservoir exploitation causing observable changes in seismic response. The Gassmann equation can be used to estimate changes in the bulk modulus of the reservoir for given...

... ABSTRACT No preview is available for this paper. equation seismic monitoring reservoir model permeability bulk modulus modeling & simulation fluid flow porosity region gassmann equation reservoir characterization akhil datta-gupta porosity injection feasibility study...

... ABSTRACT No preview is available for this paper. cementation grain moduli well logging wireline log data skeleton moduli clay content fluid saturation log analysis gassmann equation bulk modulus inversion brine upstream oil & gas database moduli gassmann skeleton...

... ABSTRACT No preview is available for this paper. seismic monitoring gassmann equation live oil petrophysical measurement water-flood process seismic method mpa upstream oil & gas reservoir characterization vp difference effective pressure vp increase carbonate core...

... geophysics compressibility seismic method pore gassmann equation hydrocarbon solvent carbonate reservoir pentane reservoir characterization effective pressure equation nur seismic monitoring saturation porosity mpa upstream oil & gas wang flooding Seismic Monitoring...

... ABSTRACT No preview is available for this paper. gassmann equation physical modeling zero-frequency velocity particle motion attenuation amplitude murphy saturation sandstone pore fluid attenuation measurement frequency dispersion winkler velocity dispersion effective...