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The AAPG/Datapages Combined Publications Database

Showing 18 Results. Searched 189,641 documents.


Abstract: How to Attenuate Diffracted Noise: (DSCAN) A New Methodology; #90211 (2015)

Ali Karagul, Todd Mojesky, XinXiang Li, and Necati Gulunay

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... for attenuating diffracted energy from shallow water inhomogeneities that are harmful to marine surveys. The method uses the double square root travel time equation...


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

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

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... or two-way, travel time can be computed from: , (2) The equation (2) is known as the double square root (DSR) equation and defines the traveltime...


Abstract: Simultaneous P-P and P-S Waveform Inversion Algorithm Using Pre-Stack Time Imaging Method ; #90187 (2014)

Hassan Khaniani, John C. Bancroft, and Eric von Lunen

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... intercept time using Double Square Root (DSR) equation and the result of Zoeppritz solvers (Aki and Richards, 1980) from the scatter point to produce...


Abstract: Full Waveform Inversion Algorithm using Time Imaging Methods; #90174 (2014)

Hassan Khaniani, John C. Bancroft, Gary F. Margrave, and Eric von Lunen

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... In the general case where the velocity inside the Earth is varying smoothly, the Double Square Root (DSR) equation serves as a starting point for total...


Abstract: Converted-wave Time Imaging … Nuts and Bolts; #90187 (2014)

Shaowu Wang, Thomas Hollis, and Wayne Nowry

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... separately. By extending the work of Ver West and Wilkinson (2003) to the double-square root (DSR) equation for converted-wave travel time proposed by Li...


Abstracts: Converted Wave Processing in the EOM Domain; #90173 (2015)

Thais A. Guirigay and John B. Bancroft

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...-way zero-offset time and to is defined from the data. The equation (2) is known as the double square root (DSR) equation and defines the traveltime...


Pre-Stack Imaging: Time or Depth? (Paper 25)

Carl Notfors, Peter Whiting, Geoff Mansfield

Geological Society of Malaysia (GSM)

... through the velocity field, or solve a recursive equation, to obtain the diffraction surfaces. Algorithms that use the "double-square root" equation...


Abstracts: True-Amplitude PS Prestack Time Migration via 5D Interpolation; #90173 (2015)

Peter W. Cary, Albert Zhang

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... CSPG/CSEG/CWLS GeoConvention 2011, Calgary, Alberta, Canada, May 9-11, 2011 square root equation of converted wave travel-time using four parameters...


Abstract: Simplified Processing of Converted Wave Data; #90224 (2015)

John C. Bancroft and Thais Guirigay

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... the double square-root equation to give the total traveltime T using T02 P hs2 T02 S hr2    2   2 T 4 4 VP VS , (2) where the T0...


Delineating Thin-Bed Tight Gas Sand Reservoir with Prestack Joint PP/PS Inversion, #41363 (2014)

Zhiwen Deng, Ming Qiang, Shuanghu Shi, Xiaofeng Liang, Yang Zhu, Yijun Zhou, Qingjia Tong

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... Shear Wave Velocity Analysis For a single isotropic horizontal layer, the following double square root equation can accurately express the converted...


Imaging Subsurface Structures Under Gas Clounds by Multi-Component Technology

Xiaogui Miao, Loh Fong Cheen, Libo Zi, Jing Du, Magali Beele, Jacques Bonnafe, Natalia Anggriani, Gilles Vallon, Claudio Strobbia

Indonesian Petroleum Association

... amplitude compensation. Figure 12 - Schematic representation for the computation of PS travel time with the double square root equation for a receiver...


Obtaining Low Frequencies for Full Waveform Inversion by Using Augmented Physics

Eldad Haber, Eran Treister, Elliot Holtham

Petroleum Exploration Society of Australia (PESA)

..., A. and Fomel, S. [2013] First-break traveltime tomography with the double-square- root eikonal equation. Geophysics, 78(6), U89–U101. Nocedal, J...


Abstract: Least Squares Pre-Stack Time Migration for Imaging and Reconstruction of Converted Waves; #90224 (2015)

Aaron Stanton

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... least squares migration with a Double Square Root (DSR) operator to express reflectivity as a function of subsurface position and ray parameter...


The influence of data selection and type of analysis on interpretations of temporal stability in Oligocene faunas of Mississippi

Christy C. Visaggi, Linda C. Ivany


... the log or fourth root (i.e., double square root) of raw abundance counts and then comparing these values using the BrayCurtis dissimilarity coefficient...


The stratigraphic distribution of fossils in a tropical carbonate succession: Ordovician Bighorn Dolomite, Wyoming, USA

Steven M. Holland, Mark E. Patzkowsky


... square-root transformation of original abundance. Cluster analysis was based on Ward’s method with Euclidean distances, implemented by the agnes method...