.... Combining the vertical slowness computed from a vertical well, the slowness vector provides a measurement to detect and determine local anisotropy around the well. This paper presents a model-based study to explore the feasibility of using DAS walkaway VSP to determine local anisotropic parameters...

... were less reliable, possibly due to the lack of wide angular coverage. Presentation Date: Tuesday, October 16, 2018 Start Time: 9:20:00 AM Location: Poster Station 16 Presentation Type: Poster arrival time vertical slowness reservoir characterization barnett shale overburden annual...

... coefficients and can be extended to radiation in anisotropic media. radiation pattern reservoir characterization amplitude anisotropic media horizontal slowness horizontal point force reflection vertical slowness hardage s-wave free-surface radiation equation upstream oil & gas lobe seg...

... aperture large enough to span the velocity medium. In contrast, we developed a velocity modeling approach based on the vertical slowness and polarization angle of microseismic events with unknown locations. We applied the technique to a microseismic dataset and compared the results with those derived from...

... field data to explore fracture- or stressinduced azimuthal anisotropy in an unconventional shale play. azimuthal anisotropy depth interval slowness total slowness polar anisotropy background vti anisotropy sin 2 vertical slowness field data upstream oil & gas marcellus interval...

... media where the overburden is heterogeneous. The technique uses P- and SV-wave vertical slowness components and polarization angles in VTI media to estimate Thomsen parameter d and anellipticity parameter ?. The proposed method is applied to a synthetic VSP data with anisotropic properties...

... with respect to horizontal slowness, ( ) ( ) ( ) ( )2 2 2 2 2 40 2 4q q q p q p = + + , (5) and fitting coefficients ( )20q , ( )22q and ( )24q with corresponding coefficients for the vertical slowness squared in a VTI medium gives frequency dependent effective medium parameters. For velocity model...

... slowness symmetry axis shank transform symmetry angle vertical slowness equation approximation upstream oil & gas accuracy reservoir characterization alkhalifah relation anisotropy parameter tti slowness anelliptic parameter The TTI slowness surface approximation A. Stovas*, NTNU...

...- tical, the slowness along the tool has to be transformed into a vertical slowness estimate. The apparent slowness along the receiver array is given by the inner product of slowness vector S r and array orientation ar . Considering the slow- ness vector to lie in the shot-receiver plane, and the receiver...

... spectrum left symbol equation integral representation vertical slowness waveguide ST 14.4 Exact generalized slowness surfaces: benchmarks for one-way wave propagation Maarten V. de Hoop *, Colorado School of Mines, Matheus J.N. van Stralen, Delft University of Technology Summary The square-root...

... propagation acquisition imaging reservoir characterization interface significance vertical slowness equation TG 1.5 Unexpected shear-wave double reflections Frank Ohlsen* and Colin MacBeth, British Geological Survey Summary A negative Thomsen s can give rise to a specific wave surface shape which...

... accuracy analysis vertical slowness slowness colorado school velocity jump wave extrapolation MIG 1.5 Accuracy analysis of screen propagators for wave extrapolation using a thin-slab model Ru-Shan Wu*, University of California, Santa Cruz, Maarten V. de Hoop, Colorado School of Mines Summary One...

... vertical seismic profile frequency band polarization angle vertical slowness synthetic seismogram eigenvector geophone seismogram transfer matrix magnitude matrix reservoir characterization separation subarray upstream oil & gas random noise eigenvalue spatial window...

... polarization angle vertical slowness incidence angle synthetic seismogram plane-wave source Quantitative Analysis of Fine Layering Effects: Medium Averaging versus Synthetic Seismograms Cengiz Esmersoy, Kai Hsu, and Michael Schoenberg, Sshlumberger-Doll Research SM 3.4 SUMMARY The effects of fine...

... ABSTRACT No preview is available for this paper. transversely isotropic medium polarization vertical slowness polarization vector vector plane wave slowness austin chalk filter coefficient discontinuity elastic coefficient separation linear transformation displacement...