Results 151 to 160 of about 240,017 (204)
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Prestack Bayesian Linearized Inversion with Decorrelated Prior Information
Mathematical Geosciences, 2020zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yu, Bo +3 more
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Thin-bed prestack spectral inversion
Geophysics, 2009Abstract Prestack seismic data has been used in a new method to fully determine thin-bed properties, including the estimation of its thickness, P- and S-wave velocities, and density. The approach requires neither phase information nor normal-moveout (NMO) corrections, and assumes that the prestack seismic response of the thin layer ...
J. Germán Rubino, Danilo Velis
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Benchmarking Prestack AVO Inversion
70th EAGE Conference and Exhibition incorporating SPE EUROPEC 2008, 2008In 2005, AVO inversion of prestack seismic data from a BP gas field was performed by three different companies. The results were highly variable and inconclusive at identifying the known zones of fizz or residual gas saturation within the field. In 2006, BP decided to perform a benchmark of the available AVO inversion algorithms using a very simple ...
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The quest for the low frequencies in prestack inversion
SEG Technical Program Expanded Abstracts 2007, 2007The pre-stack inversion process is often utilized to derive P impedance and Poisson ratio volumes used for reservoir characterization. When using high resolution (HR) seismic data, which are specifically designed for detailed reservoir delineation and characterization, the gap to bridge by the low frequency model is much greater (0-16Hz) than for ...
William R. Pillet +3 more
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Hybrid inversion, elastic impedance inversion, and prestack waveform inversion
SEG Technical Program Expanded Abstracts 2001, 2001This paper compares the results of hybrid inversion, elastic impedance inversion, and prestack waveform inversion on a single data set. The method used for prestack inversion is a Monte-Carlo-based optimization method called genetic algorithm (GA). GA performs a full waveform inversion of normal moveout (NMO) uncorrected prestack seismic data, giving a
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Prestack Seismic Inversion for Sw Modeling
2nd EAGE North African/Mediterranean Petroleum & Geosciences Conference & Exhibition, 2005A01 PRESTACK SEISMIC INVERSION FOR SW MODELING 1 B. BANKHEAD 1 A. SENA 1 J. MARTIN 3 RAMON S. CARDENAS HERNANDEZ 2 K.G. ROSAS LARA 2 G. VELASCO VASQUEZ 2 and E. MENDEZ HERNANDEZ 2 1 Veritas DGC Inc. 10300 Town Park Houston Texas 2 Pemex Exploracion y Produccion Villahermosa Tabasco 3 Veritas DGC Ltd Crompton Way Crawley UK RH10 9QN Abstract A workflow ...
J. Martin +6 more
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Prestack data attenuation compensation based on inversion
82nd EAGE Annual Conference & Exhibition, 2021Summary Due to the absorption of subsurface media, seismic waves experience energy attenuation and waveform distortion, which seriously decreases the resolution of seismic data. For prestack seismic data, since the effect of absorption attenuation varies with the propagation path, the amplitude variation with angle (AVA) trend will be distorted ...
W. Cheng, S. Wang, C. Zhou, G. Pang
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Does Our Prestack Data Support the Assumptions of Prestack Imaging and Inversion?
Offshore Technology Conference, 2004Abstract The earth is heterogeneous at all scales. Our seismic reflection data is the result of waves that have traveled up and down through many heterogeneous layers. The data distortion caused by this is not corrected by current processing techniques and invalidates many of the assumptions we use interpret it.
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Wavelets without Wells – Via Prestack Inversion
66th EAGE Conference & Exhibition, 2004P301 WAVELETS WITHOUT WELLS – VIA PRESTACK INVERSION Summary 1 In this paper we demonstrate an inversion methodology to extract a source wavelet from each prestack gather. This inversion estimates and deconvolves the effective source contribution within an interval of interest at the same time characterizing AVO with high resolution.
P.D. Anno, P.S. Routh
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Prestack waveform inversion in the western Nile delta
SEG Technical Program Expanded Abstracts 2005, 2005In 2003, Apache Egypt, along with partners RWE Dea and BP Egypt embarked on a large-scale pre-stack inversion project in their West Mediterranean Deep Marine concession in the Nile Delta. The objective was to produce 3-D cubes of three key elastic parameters: P-impedance, Poisson’s ratio and density.
R. Roberts +7 more
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