.... It is uncertain how the Arctic Ocean circulation will change. The Antarctic is likely to warm and the precipitation is likely to increase over the continent. It is uncertain to what extent the frequency of extreme temperature and precipitation events will change in the Polar Regions. Mediterranean and Europe...

... with frequency are studied. The result of processed marmousi?model indicates that the high amplitude caused by thin-bed tuning can be distinguished from that caused by gas charged reservoir by analyzing the differences between normalized different single frequency sections obtained by using TFCWT processing...

...) observed that when at least two octaves of bandwidth are present in a white, zero-phase, noise-free wavelet, the temporal resolution is determined solely by the maximum frequency component in the wavelet. In towed streamer surveys, that maximum frequency value is largely dictated by ghost filters...

... first describe a heuristic method of integrating these multiple attributes to estimate the reservoir potential. Then, we Artificial Intelligence frequency heuristic approach fuzzy logic Saudi Arabia government predicate Reservoir Potential information membership function reservoir...

... parameters were chosen to adopt single well, small charge, 1 ms sampling, 20×20 m cell size and 24 fold of coverage. High resolution full 3D RAP processing was performed, and the final section displayed high quality with dominate frequency of 48 Hz, laying a good foundation for karsting interpretation...

... occupational injuries, fatal Lost Time Injury Frequency was 1.94 per incidents and significant incidents. million hours worked, which is 20% better than for 1998 and is the lowest that has been For 1999, two-thirds of the reported hours achieved since recording began. were worked by contractors, reflecting...

... process to determine the risk to operations as the product of the likelihood risk management frequency maintenance identification reduction risk and uncertainty assessment inspection equipment item application Downstream Oil & Gas likelihood new approach maintenance activity risk...

... propagation. The diurnal component of the velocity variation we observed is stronger than the semi-diurnal component. Variations in electrical observations also correlate with the diurnal tidal component, and are particularly pronounced at source frequencies near 1 Hz and 4 Hz. The magnitude of the electrical...

... and practices are determined as the well is drilled. This results in a reduction in the frequency of drillstring failures and the amount of time spent tripping and/or fishing, and an increase in both bit life and drilling rate. This poster presents case histories selected from 18 000 hours of vibration data...

... on the analysis of EM underground propagation with extremely low frequency. The prototype has been developed by applying such advanced technologies as high temperature downhole electronics, miniaturized high power EM transmitter, realtime digital de-modulator with adaptive noise cancelling that are required...

... coverage of geophone arrays; 40 Hz in place of 12 Hz geophones; and 60 Hz high-pass filters in preamplifiers; all to enhance S/N ratio for high frequency signal components. This has increased the dominant frequency for Tertiary clastic reflections, at a depth of about 3 km, from 20 Hz to more than 40 Hz...

... have shown that greater drillin drilling fluid management & disposal frequency drilling fluids and materials bit selection Upstream Oil & Gas bit design pressure fluctuation standoff distance experiment OPCN HOCN rock erosion cavitation erosion pump pressure impact pressure...

... sismiques à haute résolution. Afin de pouvoir utiliser ces relations pour les études sismostratigraphiques de dépôts de marée en profondeur, il faut tenir compte dú changement de l'expression sismique (dû à l'absorption en fonction de la fréquence et des pertes de transmission) et des caractéristiques...

... the seismic micro-model of the reservoir, allows the identification of its chronostratigraphic limits and the seismic reference facies, taking into account the most significant seismic parameters: velocity, amplitude, phase, frequency and continuity (obtained by a computer assisted process). Moreover, the log...

... or replacements. Even a small reduction in total time required to drill a well has the potential of considerable economical benefits, especially in offshore operations. One of the possible targets for increasing the efficiency of the drilling operation is consequently the redu frequency shock absorber...

... of the sandstone. The model has recently been extended to account for the effects of shaliness, brine conductivity and oil saturation on the reactive part of the electrical conductivity at low frequencies (Induced Polarization). Several aspects of the theory have been verified experimentally. Résumé. La...

... deposits as frequency correlation seismic interpretation Reservoir Characterization eastern part reverse fault Upstream Oil & Gas seismic section Alpine Molasse migration reflection coefficient resolution ruhr district velocity log interpretation deposit structural resolution...

... neutron nuclear magnetism log analysis differentiation permittivity characteristic saturation wideband acoustic frequency borehole pulsed neutron determination reservoir well logging exploration Thickness gamma ray identification interpretation count rate NEW LOGGING METHODS...

... Abstract. Active seismic probing of rock formations containing gaseous or liquid fractions is limited by a requirement for repeatable, nondestructive sources of high frequency seismic energy. When borehole access is available it is preferable to put both the source and the receiver well under...

... seismic parameters V, V, Q, and Q, Relaxation peaks of O-' are found at frequencies from inside the seismic range to the kilohertz range. The dominant attenuation mechanism is due to electrochemical processes in the lower frequency range and due to fluid flow processes at higher frequencies. The existence...