... residual block exploration geophysicist 10 residual block loss function noise attenuation dataset reservoir characterization upstream oil & gas frequency spectrum expanded abstract artifact migrated gather architecture Deep learning based gather automated processing of migrated gathers...

... ABSTRACT We present an artificial intelligence approach for enhancing the frequency spectrum of seismic data. We used synthetic seismic data as a training dataset for constructing a neural networks operator that can solve the posed problem. We then applied this operator to real seismic data...

.... Presentation Date: Monday, October 17, 2016 Start Time: 4:35:00 PM Location: 140 Presentation Type: ORAL seismic data natural language upstream oil & gas seg seg international exposition seismic record surface diffractor surface diffraction noise diffraction noise frequency spectrum...

... effect. Introduction Currently, the spectral inversion technique has been applied by a growing number of scholars to the interpretation of bed thickness with good results. In the practical application, however, some limitations were found, for example, the frequency spectrum of reflection coefficient...

... Location: 148 Presentation Type: ORAL rtm zhang upstream oil & gas conventional rtm reservoir characterization annual international meeting seg seg international exposition annual meeting application frequency spectrum synthetic data low frequency information imaging frequency...

... to suppress ghost wave; broaden the frequency spectrum; improve the quality of seismic data. Introduction The existence of ghost wave causes several problems about seismic data. First of these problems is the notch effect, The notch effect of frequencies can be shown as following: f= nv/2z, n=0; 1; 2, (1...

... annual international meeting upstream oil & gas zhang migration reflection coefficient amplitude angle gather adcig incidence angle frequency spectrum seg interface geophysics reservoir characterization invertible radon transform invertible rt amplitude compensation factor...

... the Fourier transform to signals with a temporally shifted window, this approach is known as STFT. Because of its limitation in fixed resolution, CWT method is proposed with a time- scale map rather than a time frequency spectrum. The expression of CWT is dt a bttf a baW f 1 (1) Where )(tf...

... accuracy source modeling farfield signature airgun signature reservoir characterization calibration data modeling estimate broadband marine source signature frequency spectrum calibration measurement airgun source modeling frequency range Calibrated airgun source modeling to estimate...

... are consistent with the results from model studies. stft line spectra time frequency analysis clssa layer thickness estimation analysis window upstream oil & gas analytical spectrum wedge model apparent time thickness thickness frequency spectrum coefficient seismic data spectral time...

... design and reliability the described sparker can be operated for thousands of shots before spark plug maintenance is needed. This paper summarizes the development of the tool and presents results from recent field tests. peak frequency frequency spectrum spectrum shock wave downhole sparker...

... upstream oil & gas wavelet estimation natural fracture seismic data workflow surface seismic interpretation workflow vsp data quantitative seismic interpretation workflow acoustic impedance reservoir characterization dataset frequency spectrum reference list main menu Improved...

... a desired frequency spectrum, representative of the subsurface. This subsurface spectrum can be estimated by averaging the spectra of log curves (e.g., impedance) recorded in local wells. The spectral shaping method is particularly effective when the wavefield is dominated by primary reflections...

... spectral decomposition spectral content low frequency signature experiment signature data quality lnapl geophysics resolution upstream oil & gas wavelet transform frequency spectrum time frequency section Spectral low­frequency signature associated with a hydrocarbon spill Luis. A. Peche...

... efficiency, aliasing protection and primary preservation, compared with the frequency domain HR Radon transform. domain approach frequency domain reservoir characterization application complex data stabilisation matrix input data radon transform frequency spectrum resolution square transform...

... as an innovative survey method due to the long-distance propagation of the seismic wave. Therefore, we carried out a basic field experiment intending broadening the frequency spectrum of the percussion drilling vibrations, and found SWD with percussion drill could be quite promising. Method The conventional rotary...

... a frequency spectrum for each time sample of a seismic trace. In this way, it decomposes the seismic trace into its constituent frequencies, allowing individual target reflection events to be analyzed spectrally in every single frequency. Castagna, J., Sun, S., & Siegfried, R., 2003, describes the spectral...

.... gpr data frequency outcrop scale imaging reservoir characterization lacustrine delta sediment shot gather radar outcrop-scale imaging reflection study area exposition frequency spectrum october 2004 claystone delta sediment hammer sequence sediment imaging upstream oil & gas...

... are presented. Introduction The fundamental problem of enhancing seismic frequency can be simplified to one basic idea: improving the bandwidth on the frequency spectrum of a seismic trace while preserving its phase spectrum. To do that, we compare the low frequency trace with a high frequency trace to extract...

... that the nonlinear terms cause development of shocks and higher harmonics in the frequency spectrum. When dispersion is included, a nonlinear stress-strain relation with hysteresis can be observed. Nonlinear and Dispersive Acoustic Wave Propagation Ketil Hokstad, SINTEF Petroleum Research, N-7465 Trondheim...