... oil & gas rock type reservoir geomechanics equation exploration geophysicist simultaneous inversion zoeppritz equation approximation equation american association favo inversion frequency agreement energy 10 society Simultaneous inversion of tight-sandstone reservoir fluid...

... the spectral ratio method. The rose diagrams gathering obtained at several offsets, are in agreement with those gathering the strike direction of open and cemented fractures, obtained from cores interpretation. This is due to the fact that the attenuation is caused by a combination of scattering and fluid...

... of the low frequency band information typically comes from a low frequency model (LFM) derived from workstation horizon interpretations and logs. (Pendrel and van Riel, 2000). This method promotes good agreement between inversion and well logs at the well locations for obvious reasons. The problem is how...

... Summary This work aims to review the experience of Uruguay in multi-client agreements with services companies for the generation of information products offshore Uruguay (i.e.: acquisition and processing of geophysical data), highlighting the most important contract terms involved...

... denver 2014 agreement reservoir characterization reservoir geomechanics complex reservoir calcite permeability porosity elastic property simulation p-wave velocity voxel size carbonate reservoir micritic phase digital carbonate rock physics effective elastic property laboratory...

... Summary Synthetic ZTEM responses computed with 2D and 3D algorithms are compared. Excellent agreement is observed between 2D and 3D responses for structures with long strike lengths. Using the 2D inversion algorithm on synthetic 3D responses indicates artifacts being introduced when limited...

... surface wave continuity upstream oil & gas parachute creek formation reflector agreement 9C 2D Piceance survey: near-surface velocity model building and tomostatics solution Inmaculada Durá-Gómez* and Brian Zurek, ExxonMobil Exploration Company. Summary A nine component (9C) 2D test program...

..., the measured spatial distribution of the electric wave field is in excellent agreement with the theoretical predictions, for both the time and the frequency domain. When the grain surfaces of soils and rocks are in contact with a fluid electrolyte, they typically acquire a chemically bound surface charge...

... that demonstrate the value of such information early on in the field life cycle and how it has impacted the reservoir management of the field. seismic survey dynamic model shell nigeria exploration agreement reservoir bonga field reference list time-lapse signal simulator interpretation reservoir...

... phase, with the aim of finding a statistical method which consistently predicts a phase in agreement with well logs. The statistical method of kurtosis maximization by constant phase rotation was consistently able to extract a phase in agreement with seismic-to-well ties. Furthermore, the second method...

... oilfield service anisotropy dispersion log analysis receiver annual international meeting estimation agreement upstream oil & gas rotation well logging waveform algorithm fast shear direction anisotropy processing transmitter Anisotropy processing without matched cross-dipole...

... walkaway VSP lines. The transmitted shear birefringence and reflected P-wave azimuthal AVO were analyzed in terms of azimuthal anisotropy and fracture parameters. The results are in agreement with one another and with the general fault trends mapped from the seismic attributes. A consistent fracture strike...

... gradiometry formula computation agreement gravity geophysics Gravimagnetic eld tensor gradiometry formulas for uniform polyhedra Horst Holstein , Edel M. Sherratt: U Wales, Aberystwyth; and Alan B Reid: Reid Geophysics Ltd. SUMMARY This study gives closed formulas for the gravity eld gradient...

... Summary Fluid effects in carbonate rocks were successfully modeled to predict 4D related saturation changes and AVO/AVA (Amplitude Variations with Offset/Angle) seismic responses. The modeled predictions are in agreement with seismic observations in Abu Dhabi carbonate fields. The results...

... data kittridge modulus-domain rock physics diagnostic rock physics departure geophysics upstream oil & gas shell international ep inc modulus model sandstone frac reservoir characterization agreement porosity modulus-domain rock physics Modulus-domain Rock Physics Diagnostics: New...

.... There is an excellent agreement between numerical results and theory, with a small error associated with partially inequilibrated patches of fluid in the FEM. These patches of fluid result in a residual stiffness which can be subtracted from the FEM results to further improve agreement with Gassmann theory...

... the samples during the uniaxial compression test. Dynamic Young's modulus was compared to static Young's modulus from both LVDT and strain gauge measurement. There is a good agreement between dynamic Young's modulus and static Young's modulus from strain gauges. But Young's modulus from LVDT is not equal...

... sufficient saturation changes had occurred. The results of the 4D pilot showed that 3D seismic surveys can be repeated onshore with acceptable background noise levels, if done in the correct manner. Model predictions were found to be in agreement with the 4D results.4D responses were found in the main...

..., the results are heavily dependent on the electric field orientation of the impedance tensor component being inverted. Our experience suggests that inverting the impedance component with the electric field perpendicular to the dominant structural strike yields the best agreement with the seismic salt structure...

... are shown to be in excellent agreement with experimental measurements over a wide range of porosities (5%_<25%). Four small (5 mm i.d.) plugs from a producing gas field have also been analysed. Unlike Fontainebleau, these four cores exhibit a broad range of pore and grain sizes, porosity and mineralogy...