... Borehole acoustic reflection imaging is a useful application for detecting geological structures around the borehole. The recent development of shear-wave imaging using a dipole source-receiver system allows for determining the azimuth information of the structures. Existing analyses, however...

... measurement upstream oil & gas electric dipole transmitter sensitivity application magnetic field response well logging reservoir navigation anomaly field response detection sensitivity drilling data acquisition logging while drilling geosteering electric dipole source electric field...

... geophysicist 10 streich casing design infrastructure geophysics hydrocarbon reservoir reservoir characterization modeling steel infrastructure seg international exposition electric field swidinsky survey line upstream oil & gas receiver amplitude dipole source metal infrastructure Can...

... ABSTRACT We generalize an existing distorted Born iterative method for inversion of electromagnetic data in anisotropic conductive media during geosteering so that it can deal with magnetic dipole sources. The magnetic and electric fields are determined by two coupled integral equations...

...: 1:50 PM Presentation Time: 1:50 PM Location: 225C Presentation Type: Oral upstream oil & gas receiver modeling source electromagnetic data frequency local mesh reservoir characterization dipole source computing time original model dipole receiver conductivity...

... Type: Oral annual meeting diameter shear slowness shear arrival well logging upstream oil & gas velocity model near-borehole structure bedding imaging result shear wave borehole tang imaging dipole source sonic imaging slowness reservoir characterization log analysis seg...

... in dipping wells, it is necessary to calculate the fields in four cases: two field components from two dipole sources. The results presented here show that only one of the four components (the horizontal field in the same direction as the horizontal sources dipole moment) suffers influence from surface...

... ABSTRACT In this study, we present a multi-parameter vector acoustic full waveform inversion (FWI) method. The difference between our method and conventional acoustic FWI is that both recorded pressure and components of displacement are used as data, as well as monopole and dipole sources...

... seg seg international exposition velocity model monopole pressure source artificial intelligence horizontal dipole source bp velocity model dipole source regularization vector data reconstruction inversion objective function upstream oil & gas annual meeting equation reservoir...

... meshfree method dipole source memorial university newfoundland smooth rbf three-dimensional controlled-source em node radial basis function-generated finite difference approximation seg seg international exposition artificial intelligence upstream oil & gas meshless approach jianbo machine...

... and multipole reception of elastic waves, excited by a dipole source, is carried out. In order to optimize azimuthal detection, the relationships between S wave polarization and both source-receiver offset and source-reflector angle are analyzed. Results indicate that the S-S reflection is most sensitive...

... of a dipole source by comparing the energy flow of radiated waves away from borehole to that of the flexural wave along borehole. Using this method, we study the frequency variation characteristics of the energy flow and radiation efficiency for a dipole source in a fluid-filled borehole. Our analysis results...

... explores the feasibility of adopting a dipole source-receiver system to perform LWD remote acoustic reflection survey. The radiation patterns of SH- and SV-wave and the energy fluxes of radiant SH-wave are calculated for acoustic LWD and wireline cases, respectively, demonstrating the main controlling role...

... ABSTRACT We examined the electric field strength response to tri-axial electric dipole sources in VTI anisotropic formations. The tri-axial electric field strength data are used to measure not only the anisotropic resistivity of the formation but also the relative dip angle of the tool...

... heating. Presentation Date: Wednesday, October 19, 2016 Start Time: 8:25:00 AM Location: Lobby D/C Presentation Type: POSTER annual meeting tunnel axis tunnel magnetic dipole inhomogeneity tunnel detection seg seg international exposition ballard detection fresh water dipole source...

... a node that notches the low frequencies. In contrast, the ghosting characteristic of a marine dipole source has an antinode that amplifies the low frequencies. With adequate forcing, the marine dipole source can radiate far field amplitudes at low frequencies that are useful for seismic exploration...

... acoustic equation has been proved to be improper for the wave excited by dipole source in this paper. An elastic wave reverse time migration (RTM) is developed for more exactly imaging of dipole reflected wave to find the location of effective reservoir. The problem of storage in RTM is solved...

... need to be considered. upstream oil & gas seg houston 2013 geophysics frequency background conductivity low frequency dipole source magnetic target anomaly spherical target dc resistivity dipole magnetic source conductivity reservoir characterization field anomaly magnetic...

... is showed to prove that the velocities of borehole flexural modes are consistent with group velocities of body shear waves in axisymmetric borehole models. We also investigated the azimuthal order of acoustic field in deviated wells. Stoneley waves excited by SV-oriented dipole sources and SV-oriented...

... Summary A monopole or a dipole source in a fluid borehole generates acoustic waves, part of which propagate along the borehole and the other part enter the formation propagating as P- or S-waves. The refracted waves propagating along the borehole wall are used to determine P- and S-wave...