.... Land seismic QI is still challenging. However, there is opportunity for further significant improvement by better addressing the significant distortion of the seismic wavelet at the source and receiver and incorporating uncertainty information in the QI measurements. geologist distortion...

...-noise separation fei luo evaluation vibrator applied geoscience society spectrum lianbin jiang asia government frequency exploration geophysicist energy 10 distortion excitation guowei wei Quantitative evaluation of vibroseis excitation signal based on signal-noise separation Fei Luo...

... sweeps with the starting frequency as low as 1.5 Hz. However, it is frequently observed that in most cases the harmonic distortion poses a significant degradation on the fundamental ground force signal at low frequencies. In general, the fundamental force decreases as harmonics increase. In this paper...

... Land seismic challenges are usually attributed to superimposed near-surface noise. We suggest that small- scale near-surface scattering distorts the reflections themselves via a mechanism we refer to as “seismic speckle,” similar to speckle noise in optics and acoustics. We describe a simple...

... and the numerical differentiation capabilities of machine learning software packages. We will explain the new inversion technology and demonstrate the advantages of the new workflow through synthetic and real data. machine learning international geophysics reservoir characterization distortion particle...

... Analysis of seismic amplitude-versus-angle (AVA) is a primary technique for deriving hydrocarbon indicators. Many seismic processing algorithms distort amplitudes. We extend existing work and propose a general framework for modeling-based amplitude recovery (MBAR) through paired processing...

... association energy 10 international applied geoscience variation brazilian equatorial margin exploration geophysicist exploratory frontier revisiting resolution society reservoir characterization tlfwi distortion platform kirchhoff migration Revisiting the Brazilian Equatorial Margin...

..., providing high-fidelity data for the exploration and development of sub-salt oil and gas reservoirs. upstream oil & gas gypsum salt rock exploration geophysicist 10 optimization problem thickness geophysics china subsalt structure artificial intelligence applied geoscience distortion...

... or to model and subtract. However, micro-scattering is a physical phenomenon that is repeatable. It can be treated as a predictable distortion effect of signal and noise rather than purely producing unwanted energy. We show that this surface distortion from near surface scattering can be measured from data...

..., 2014; Xianguo et al, 2018; Bakulin et al, 2020)) Since this noise is caused by a physical phenomenon, it is repeatable and measurable. We show that the noise can be treated as complex signal distortion from small scale near surface scattering. expanded abstract exploration geophysicist 10...

... resolve the geobodies geobodies can be seen in the cross-section of the Vp for the indicates that distortion of signal is an important component model in Figure 1. of noise which the massive data volume does not solve. These data can be used to test the multi-step procedure of Seismic noise can...

... Corrections for the near-surface viscoelastic attenuation distortions are needed to enable the analysis of the true reflectivity response from the reservoir. Current surface-consistent amplitude balancing and deconvolution methods relying on reflected energy are often insufficient to provide...

... distortion vibratory source kirchhoff migration receiver position simple theory We propose a new processing approach not only to correct but to exploit the effects of the motion of marine vibratory source deployed an offshore seismic survey. We decompose the survey data into plural sections...

..., the emission of this new low-frequency bandwidth is associated with levels of distortion much higher than with the conventional sweep bandwidth, owing to the inherent design of seismic vibrators based on hydraulic actuators. Several solutions have been proposed in recent years to prevent the generation...

... ABSTRACT Velocity variations in complex structures will lead to velocity trap effect, distorting structures in time migrated sections. In seismic data interpretation of complex structures, it is important and challenging to predict structure distortion and to evaluate reasonability of seismic...

... distortion seg seg international exposition upstream oil & gas resolution reservoir level refraction reflection tomography model shelf offshore australia reservoir characterization reflection fwi variation frequency fwi model case study deeper section fwi Lambare...

... targets. We propose a new approach to correct for such velocity errors. By redatuming recorded wavefields to the vicinity of the geologic features we seek to resolve, we could identify far-field wavefront phase distortions resulting from short-wavelength velocity errors. We corrected for these phase...

... ABSTRACT The marine vibrator has a major advantage over the air-gun in that it is more environmentally friendly but because of source movement, a Doppler Effect must be removed from the recorded trace. We propose an efficient method in the domain to remove the Doppler phase distortion...

... upstream oil & gas fwi seg seg international exposition complexity velocity model annual meeting reservoir characterization distortion reservoir complexity ABSTRACT The use of acoustic FWI as a velocity model building tool has by now been well-documented in numerous publications...

... upstream oil & gas residual migration procedure reservoir characterization rmo pick western black sea distortion inversion annual meeting Al-Yahya , K. , 1989 , Velocity analysis by iterative profile migration : Geophysics , 54 , 718 – 729 , 10.1190/1.1442699...