Subtle Discontinuity Detection and Mapping for Carbon Sequestration Assessment in the Illinois Basin

J. H. McBride, R. W. Keach II, H. E. Leetaru, W. J. Nelson

AAPG Special Volumes

.... The seismic data are displayed in traveltime: no detailed velocity information is available for time-depth conversion; however, because the lateral variation...

Full-Waveform Inversion Application on 2D Slanted Streamer Data - A Case Study

Andreas Waluyo

Indonesian Petroleum Association

... migration workflow that includes designature to zero phase, random and linear noise attenuation, multiple elimination, Kirchhoff prestack depth...

Abstract: Migration Velocity Analysis Using the Common Image Cube, by Saleh M. Al-Saleh; #90105 (2010)

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Time-Lapse Seismic and Geomechanics

Martin Landrø, Lasse Amundsen

GEO ExPro Magazine

... that such stretching will reduce the P-wave velocity of the rock, and hence will introduce an overburden time shift. Guilbot and Smith (2002) used 4D...

Abstract: AVAZ Inversion for Fracture Orientation and Intensity: a Physical Modeling Study; #90187 (2014)

Faranak Mahmoudian and Gary F. Margrave

Search and Discovery.com

... planes, and its elastic properties have already been determined using traveltime analysis. This experimental model represents a HTI layer. We follow...

Abstract: Advantages and Disadvantages of Array Depth Placement and Longer Toolstring Apertures; #90187 (2014)

N. Verkhovtseva and J. Shaffner

Search and Discovery.com

... velocity model analysis when it is harder to achieve small traveltime residuals on all levels. Good calibration data with P- and S-waves visible...

AAPG Memoir 76, Chapter 16: Pore Pressure ahead of the Bit: An Integrated Approach

Nader C. Dutta, William H. Borland, W. Scott Leaney, Richard Meehan, and W. Les Nutt

AAPG Special Volumes

... is generally in the form of a prediction of acoustic impedance vs. two-way traveltime. Using an empirical velocity-density relationship...

First-arrival traveltime and slope tomography in tilted anisotropic media with undulant topography

Xiaole Zhou, Serge Sambolian, Gaoshan Guo, Stephane Operto, Haiqiang Lan, Ling Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

...-coherent events to build high-resolution subsurface velocity models. These models can be further used as background/initial models for depth migration...

Value of conventional PS-wave velocity analyses for PSDM of deep-water OBS data

James Gaiser, James Simmons, Moacyr de Souza Bezerra

International Meeting for Applied Geoscience and Energy (IMAGE)

... provides a valuable initial S-wave model of the shallow overburden for PS-wave PSDM. used to establish a depth velocity model to perform normal moveout...

An Interpreter's Guide to Improvements in Depth Imaging Through Model-Based Velocity Estimation and Refinement

Andy Furniss

Indonesian Petroleum Association

... the error in traveltime within each layer. For example, in Figure 12, the residual time delay observed at point A is an accumulation of velocity and depth...

Application of generalized radon transform migration to crosswell seismic geometry

Shujaat Ali, Olga Podgornova, Takashi Mizuno, Joel Le Calvez

International Meeting for Applied Geoscience and Energy (IMAGE)

... in traveltime residuals was observed after this step (Figure 1). Some short wavelength residuals in the zero depth offsets in the tomography calibrated...

ABSTRACT: An Integrated Approach to Pressure Prediction from 3D Seismic Data, by Mike French and Dr. Nader Dutta; #90913(2000).

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Abstract: Salt Shape Tomography; #90254 (2016)

Patrice Guillaume, Olivier Hermant, Stanislaw Warzocha

Search and Discovery.com

... contrasts on depth-migrated common image point gathers. In the multi-layer approach, the sharp velocity contrasts are introduced as layer boundaries. Using...

Abstract: Near Surface and Anisotropy Modeling Strategies for Fast-Track Land Depth Imaging; #90319 (2018)

Ernesto Sandoval-Curiel, Daniele Colombo

Search and Discovery.com

... near-surface modelling by generating velocities in depth, together with long-, medium- and short-wavelength static corrections, reflection velocity...

Enhance near-surface velocity tomogram using land-streamer data

Sherif M. Hanafy

International Meeting for Applied Geoscience and Energy (IMAGE)

... surveys. The proposed approach is tested using one field example. The traveltime tomogram of the conventional + land-streamer data shows the same depth...

Traveltime Computations for Locating the Source of Micro Seismic Events and for Forming Gridded Traveltime Maps

John C. Bancroft

Search and Discovery.com

... a spherical wavefront. The raypath and gridded traveltime estimations assume that the local velocity in the area defined by the defined times is constant...

Traveltime Computations for Locating the Source of Micro Seismic Events and for Forming Gridded Traveltime Maps

John C. Bancroft

Search and Discovery.com

... a spherical wavefront. The raypath and gridded traveltime estimations assume that the local velocity in the area defined by the defined times is constant...

Shallow Crustal Structure of the Solomon Islands Intra-Arc Basins from Sonobuoy Seismic Studies

A. K. Cooper, T. R. Bruns, R. A. Wood

Circum Pacific Council Publications

.... The computational method uses linear regres­ sion to determine the slope (k) of the velocity versus one-way traveltime curves. Linear regressions...

Chapter Ten-part 2: Depth Conversion

Leslie R. Denham, Dave K. Agarwal

AAPG Special Volumes

... to depth directly. Some corrections are usually needed: a correction for a near-surface low velocity layer at the source; corrections of source elevation...

Estimating Thermal Conductivity in Sedimentary Basins Using Lithologic Data and Geophysical Well Logs (1)

FREDERIC BRIGAUD , DAVID S. CHAPMAN , and SYLVIE LE DOUARAN

AAPG Bulletin

... velocity: Geologie en Mijnbouw, v. 59, p. 215-224. Kappelmeyer, O., and R. Haenel, 1974, Geothermics with special reference to application...

Enhanced ray-based tomography method

Jonathan Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... linear equations and least-squares problems: TOMS, 8, no. 2, 195–209. Zhou, H.-W., 2003, Multiscale traveltime tomography: Geophysics, 68, 1639–1649...

Travel-time tomography for joint velocity and transducer location estimation

Edan Gofer, Raanan Dafni, Albert Shalumov, Ramon Axelrod, Moshe Oziel, Pinny Chaviv

International Meeting for Applied Geoscience and Energy (IMAGE)

... of each transducer. We propose a double-difference traveltime tomography method that jointly solves for transducer locations and a velocity model...

Structural and Tectonic Evolution of Oceanic Crust within the Jurassic Quiet Zone, Offshore Morocco: Chapter 14: African and Mediterranean Margins

James S. Holik, Philip D. Rabinowitz

AAPG Special Volumes

... analysis were used in deriving continuous velocity functions in the form of least-square linear regressions (Houtz et al., 1968). The velocity functions...

Rock Properties and Seismic Attributes Analysis of Chert Reservoirs in the Devonian Thirtyone Formation, West Texas

Dongjun Fu, Charlotte Sullivan, Kurt Marfurt, Joel Famini, Peter Wang

West Texas Geological Society

... limestones and thin-laminated cherts (Figure 8 & 9). Figure 8. P-wave velocity vs. porosity showing a linear relationship. Vpd, Vpo, and Vpw are P-wave...

Abstract: Imaging Scattered Seismic Energy in Alberta Oil Sands; #90187 (2014)

Andrew V. Barrett

Search and Discovery.com

... of the anisotropy and the curved raypaths of the depth-dependent velocity. Examples A prestack Kirchhoff time migration module which outputs a set...