... from both measurements are similar, with the Alford rotation being more sensitive. The shear results indicate fracture creation in the overlying formation, suggesting an inefficient process that would have a negative impact on production. alford rotation polarity geophysics hydraulic...

...The polarity discrimination method of seismic data based on correlation of seismic attributes and its application in Bohai A oilfield Shuai Guo*,Bo Wang, Tongxing Xia , Hong Wei CNOOC Ltd. Tian jin Branch Summary coefficient, the positive reflection coefficient interface corresponds to the wave...

... the measurement to velocity. The DAS-transformed velocity preserves the polarity attribute and the amplitude dependence with angle of the traditional velocity measurement. The amplitude gain is 40% at 45° and 100% at a 60° angle. A Strain-Velocity summation methodology is introduced to effectively perform...

... Session Start Time: 9:20 AM Presentation Time: 10:35 AM Location: Poster Station 8 Presentation Type: Poster reservoir characterization polarity characteristic shane carley upstream oil & gas reliable technology amplitude andrew royle mexico deepwater field michael murat seg...

... alternative encoding strategies to the conventional polarity encoding in time domain: In the first, we encode each shot applying a random static shift; In the second, we encode each shot applying a random phase rotation of the seismic wavefield. The velocity updates are carried out with the restarted L-BFGS...

... artificial intelligence information seg international exposition small angle migration velocity amplitude image domain local stack segmentation method velocity error amplitude position annual meeting polarity imaging improvement international exposition artifact annual international meeting...

... at Grane, offshore Norway. Presentation Date: Monday, October 15, 2018 Start Time: 1:50:00 PM Location: 208A (Anaheim Convention Center) Presentation Type: Oral s-wave velocity model ocean bottom cable offshore norway polarity liner failure annual meeting upstream oil & gas norway...

... Seismic interpretation is often based on the analysis of amplitude anomalies, and these can depend strongly on the seismic wavelet present in the data. However, if the wavelet polarity or phase is not known or if fine-scale impedance variations are complex, a direct interpretation...

.... Unlike the usual behavior of water-bottom multiples with alternating polarity observed in the Bosphorus case, we find that the polarity of the water-bottom primary and first-order water-bottom multiples are the same in the Golden Horn case. The polarity behavior of the water-bottom multiples...

... ABSTRACT We propose an elastic scalar imaging condition that corrects for the polarity change; however, this imaging condition requires additional prior information which may not be known accurately, or may suffer from interference of waves propagating from opposite sides of a reflector. Using...

... ABSTRACT Elastic reverse time migration (E-RTM) has limitations when the migration velocities contain strong contrasts. First, the vector-based imaging condition needs to use the reflector-image normal, and also cannot give the correct polarity of the PP image in all possible polarization...

... exposition dispersion annual meeting frequency domain wave propagate polarity propagation characteristic attenuation medium mechanism forward modeling Chapman , M. , 2003 , Frequency-dependent anisotropy due to meso-scale fractures in the presence of equant porosity : Geophysical...

... ABSTRACT A more meaningful and less cross-talk image can be obtained through elastic RTM when the correlation imaging condition is applied to separated wave-modes, instead of displacement components. However, for the sake of the more meaningful image, wavefield separation and polarity reversal...

... reservoir characterization wavefield extrapolation polarity image condition Aki , K. , and P. G. Richards , 1980 , Quantitative seismology, theory and methods : W. H. Freeman and Co. Cervený , V. , 2001 , Seismic ray theory : Cambridge University Press , 10.1017...

... low frequency reflection coefficient meier frequency ghost notch duren vibrator ghost notch upward polarity particle velocity low frequency seismic acquisition mark upstream oil & gas dipole source marine dipole source A marine dipole source for low frequency seismic acquisition...

..., especially in the shallow zone of interest. For the PP data, the default zero-offset synthetic seismogram did not tie the seismic data at the top of the Upper Cretaceous Milk River Formation. We investigated the theoretical offset response of this event and observed a change in polarity at an incidence...

... deghosting method (SGDG) for variable depth streamer. The proposed method extend the above method (Mo and Lu, 2009) for variable depth streamer by assuming that these ghost parameters are variant in time-space domain. polarity reference list time-space domain seg soubara frequency notch reservoir...

... characterization waveform relative magnitude fault detection technique earthquake richter polarity The fault detection technique characterized by microseismic Chen Yin*, Chengdu University of Technology and Sichuan Geophysical Company of CNPC Furong Wu, Yalin Li, Guangmin He, Liting Liu, Fengyao Yuan...

... wavefield upstream oil & gas cable seg denver 2014 coefficient polarity acoustic sensor das depth interval poletto experiment reservoir characterization reflection separation dual seismic field reference list recording point direct arrival Dual seismic fields from distributed...

... for a phase-squared scanning algorithm. algorithm focal mechanism reservoir characterization snr false trigger upstream oil & gas candidate event event detection correlated noise single channel snr threshold value noise detection root-n behavior channel count polarity attenuation...