Performance of elastic FWI for different wrapping angles of helical fiber in seafloor-deployed DAS

Shogo Masaya, Masanori Tani

International Meeting for Applied Geoscience and Energy (IMAGE)

... of α = 15, 30, 45, 60, and 75 degrees. (b) True S-wave velocity (c) True P-wave velocity in isotropy plane (d) True P-wave normal-moveout velocity (e...

Large-Scale Pore Pressure Prediction After Pre-Stack Depth Migration in the Caspian Sea (Geophysics Paper 24)

Norbert van de Coevering, Hazim Hameed Al-Dabagh, Liau Min Hoe, Tony Jolly

Geological Society of Malaysia (GSM)

... are refined to calibration data such as mud weight, pressure measurements and drilling events. A second prediction based on resistivity logs is carried out...

Uncertainty in Surface Microseismic Monitoring; #41258 (2013)

Mike Mueller, Michael Thornton, and Leo Eisner

Search and Discovery.com

... can we be that the detected events are, in fact, true microseismic events and not spurious noise? The second relates to the event localization: How...

Slalom Line

R. Garotta

Indonesian Petroleum Association

... 12, at about 1.9 second. Figure 12. Slalom Line, Raw Stack WLP processing takes care of the lateral dip, as is apparent in figure 13. All the five...

Three-Dimensional Seismic Method: Part 7. Geophysical Methods

Oz Yilmaz

AAPG Special Volumes

... deviations from a single hyperbolic moveout within a common-cell gather. For land 3-D surveys, azimuth-dependent moveout within a common cell gather...

Abstract: A Comparison of Standard Migration with EOM for Hussar Data; #90174 (2014)

Thais A. Guirigay, John C. Bancroft, and J. Helen Isaac

Search and Discovery.com

.... After the CSPs are formed, the second step in the EOM method consists of scaling, filtering, normal moveout (NMO) and stacking to complete...

The Wave Equation Applied to Migration

D. Loewenthal, L. Lu, R. Roberson, J. Sherwood

Southeast Asia Petroleum Exploration Society (SEAPEX)

... with the assumed properties, a relatively simple transformation of A(x, t) will yield a reasonable approximation to the desired migrated section B(x, τ). Method...

Comparison of Magnetic Vector Inversion With Sparse Norm Susceptibility Inversion Accounting for Demagnetization

John M. Weis, Lindsey J. Heagy, Douglas W. Oldenburg

International Meeting for Applied Geoscience and Energy (IMAGE)

... χHS is significant. For an isolated body, this term tends to reduce the magnetization in comparison to the linear approximation. This phenomenon...

Elastic Anisotropy of Shales ƒ Revisited; #41557 (2015)

Marina Pervukhina, Patrick N. J. Rasolofosaon

Search and Discovery.com

... publication (Thomsen, personal communication). It is composed of 59 samples of shales or shaly formations. The second database (Pervukhina et al., 2013...

A method for assessing earth model uncertainty in the Taranaki Basin, New Zealand

Edward Lewis, Dennis van der Burg, Tony Martin, Lorenzo Russo, Tony Bell

Petroleum Exploration Society of Australia (PESA)

... envelope. This is adjusted to account for local dip giving a 3D error envelope. The second method uses model integration to create a volumetric 1D depth...

Understanding Seismic Amplitudes, by Steve Henry, #40135 (2004).

Search and Discovery.com

Elastic multiparameter full-waveform inversion application on sparse ocean-bottom node data

Denes Vigh, Xin Cheng, Bing Bai, Zongcai Feng, Kate Glaccum

International Meeting for Applied Geoscience and Energy (IMAGE)

... using the acoustic approximation has produced success in deriving P-wave velocity models to achieve an accurate and high-resolution image...

Abstract: Exact, Linear and Nonlinear AVO in Terms of Poroelastic Parameters; #90187 (2014)

Steven Kim and Kris Innanen

Search and Discovery.com

.... This approximation will then be compared to Russell and Gray’s formulation for consistency. We will then show the second and third-order approximations using examples...

Seismic Rock-Property Transforms for Estimating Lithology and Pore-Fluid Content, by Haitao Ren, Fred J. Hilterman, Zhengyun Zhou, and Mritunjay Kumar, #40224 (2006).

Search and Discovery.com

Seismic Expression of the Boundaries of a Miocene Carbonate Platform, Sarawak, Malaysia

Guido L. Bracco Gartner, Wolfgang Schlager, Erwin W. Adams

AAPG Special Volumes

... (e.g., by dip moveout and velocity analysis, normal moveout correction, and Kirchoff migration) and an increase in resolution by zero phasing...

Abstract: The Approximate use of 1D Internal Multiple Prediction in a Multidimensional World: Errors and Recommendations; #90224 (2015)

Pan Pan and Kris Innanen

Search and Discovery.com

..., and in principle require the use of 1.5D, 2D and/or 3D versions. But in practice errors from dip and offset accrue gradually. To maximize the usefulness...

Methods of Oil Exploration in the Irkutsk Amphitheater

V. F. Gorbachev, A. N. Zolotov, A. S. Povyshev

Petroleum Geology: A Digest of Russian Literature

... prospects of the first group of structures is very high; this is indicated by the discovery of commercial oil and gas in the Markovo area. To the second group...

Field Testing of the Industrys First All-Muds At-Bit Resistivity Tool

Tsili Wang

Unconventional Resources Technology Conference (URTEC)

... are shown in Fig. 10 for the 4-MHz frequency. At low dip angles, the approximation is closer to the RAT response but at high dip angles...

Mapping of Rock Property Changes in Space and Time Using Microseismic Data through Full-Waveform Inversion

Jyoti Behura

Unconventional Resources Technology Conference (URTEC)

... result in seismic activity might be below the noise threshold. Second, the imaged hypocenters are most likely inaccurate. This is because the imaging...

Key Aspects of Multi-Azimuth Acquisition and Processing

James Keggin, Ted Manning, Walter Rietveld, Chris Page, Eivind Fromyr, Roald van Borselen, Mazin Farouki

Indonesian Petroleum Association

..., Mazin Farouki © IPA, 2011 - 32nd Annual Convention Proceedings, 2008 IPA08-G-159 PROCEEDINGS, INDONESIAN PETROLEUM ASSOCIATION Thirty-Second Annual...

Anisotropic Pre-Stack Depth Migration in the Cusiana and Cupiagua Sur Fields

J. Checa, M. Mesa, N. Burke, J. Calderon, H. Alfonso, U. Egozi, B. Ver West, M. Yates

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... velocity. The parameters are the dip and azimuth of the tilted axis and Thomsen’s δ and ε. Figure 8. Distribution of the well miss-ties as the WMT...

Demultiple for Wide-Tow Broadband Acquisition in a Shallow Water Environment: A Case Study from the NW Shelf, Australia

Mike Hartley, Shuo Ji, Alex Browne

Petroleum Exploration Society of Australia (PESA)

.... First and second order receiver side ghost notches (dashed lines) are clearly visible in the f-x display on input data. Note the variable notch...

Use of Synthetic and Antithetic Shear to Model the Development of Gulf Coast Listric Normal Faults

John H. Spang

GCAGS Transactions

... are sheared into a lower dip during this second deformation, and layering, which formerly dipped away from the fault, is rotated to dip into the fault. New...

Seismic Data Acquisition and Processing in the Midway-Sunset Oil Field

C. R. Willingham, A. S. Wylie Jr., D. J. Underwood

Pacific Section of AAPG

...: 0.700 to 2.200 seconds Velocity analysis Automatic residual statics Gate: 0.400 to 2.800 seconds Dip Moveout Velocity analysis Pre-stack...

Conditional image prior for uncertainty quantification in full-waveform inversion

Lingyun Yang, Omar M. Saad, Tariq Alkhalifah, Guochen Wu

International Meeting for Applied Geoscience and Energy (IMAGE)

.... In conditional DIP, two inputs are utilized. The first input denoted as x, aligns with traditional DIP framework. The second input, referred...