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The AAPG/Datapages Combined Publications Database

Showing 59,514 Results. Searched 187,807 documents.

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Chart Migrations

Frank A. Roberts

Oklahoma City Geological Society

... universal dip chart: The average velocity must be known and constant. The accuracy decreases as the depth decreases and as the dip increases...

1958

Slide Rule Seismic Computations

Robert H. Mansfield

Oklahoma City Geological Society

... a wide range of possible velocity functions. The circular ray path obtained by using a linear increase of velocity with depth provides a rather accurate...

1958

AAPG Memoir 76, Chapter 18: Velocity Estimation for Pore-Pressure Prediction

David W. Bell

AAPG Special Volumes

... in Sedimentary Basins and Their Prediction Al-Chalabi, M., 1997, Parameter nonuniqueness in velocity versus depth functions: Geophysics, v. 62, p. 970–979...

2001

Rapid Multiple-Scenario Depth Structure Risk Analysis Case Study in Cuulong Basin, Vietnam

Nguyen Nam, Hong Shien Lee

Indonesian Petroleum Association

... illustrates depth conversion using 3D velocity model that calibrates many sources including seismic velocities, time depth functions, well picks and surfaces...

2008

Influence of Lithology and Neogene Uplift on Seismic Velocities in Denmark: Implications for Depth Conversion of Maps

Peter Japsen

AAPG Bulletin

... < 100 m and by 100 for ^Dgrz >= 100 m. No attempt, however, was made to establish velocity-depth functions corresponding to normal compaction curves...

1993

Advances in Depth Imaging Technology: Rock Physics Guided Migration of Seismic Data in 3D

Nader C. Dutta, Sherman Yang, Jianchun Dai

Indonesian Petroleum Association

... An example is given in Figure 6 that shows how the template is used to guide the velocity model. We illustrate the application using the anisotropic depth...

2012

High-Resolution Model Building in a Full-Azimuth Nodal Survey in the GOM

Sandip Chattopadhyay, Gary Rodriguez, Tefera Eshete, Guy Hilburn, TGS

GEO ExPro Magazine

... were edited before using them for calibration. Scalar functions were derived at checkshot locations to match the migration velocity to the checkshots...

2016

A Comparison of Depth-Conversion Methods in the Gulf of Mexico

Melvan D. Carter, Gary R. Hyatt

GCAGS Transactions

... for each layer is given the mean value Figure 1. Depth error between the wells and the seismic depth derived from using seismic times and a mean velocity...

1990

Machine Calculation of Migration Data

E. Usdin

Oklahoma City Geological Society

.... It is programmed to solve the migration problem for linear increase of velocity with depth. A sample print-out of a dip calculation is shown...

1958

A Simple Guide to Depth Conversion: Part I

Ashley Francis

GEO ExPro Magazine

...: Combining well and seismic velocity data using geostatistics to obtain the advantages of both datasets. Practical Depth Conversion Well Velocities...

2018

The Seismic and Geological Definition of a Reef

R. A. Maxwell, W. Thomsen, F. Wilson

Oklahoma City Geological Society

.... Interval velocity calculations were made on each of the three functions of Figure 6. In Figure 7 the results of the analysis from the shelf function (M5...

1973

AVO Modeling of Monochromatic Spherical Waves: Comparison to Band-Limited Waves; #41567 (2015)

Charles Ursenbach, Arnim Haase

Search and Discovery.com

... be obtained using the method of Ursenbach et al. (2005). Recent developments have improved this method so that calculations may be readily carried out...

2015

Incorporation of Geology, Wells, and Rock Physics into Anisotropy Estimation for Seismic Depth Imaging Enables True Earth ModelŽ, #40828 (2011)

Huyen Bui, Peck-Hwa David Ng, Jenny Zhou, Chih-Wen Kue, Mart Smith

Search and Discovery.com

.... Likely, it was thought that, if the depth-migrated velocity was wrong, seismic anisotropic functions (Thomsen’s delta and epsilon) were also wrong...

2011

ABSTRACT: Mudstone Compaction Trends and their Use in Pore-Pressure Prediction

Nazmul Haque Mondol, Knut Bjorlykke, and Jens Jahren

GCAGS Transactions

... potentiality to develop overpressure even at shallow or moderate burial depth. Calculations assuming vertical flow show that fracture pressure...

2008

Depth Imaging Through Surface Carbonates: A 2D Example from the Canadian Rocky Mountains; #41554 (2015)

Yong Hua, Don Lawton

Search and Discovery.com

... to refine the initial velocity model using common image gathers (CIGs) and segments picked on the resulting depth section. Four iterations were conducted...

2015

Abstract: Introduction to Reservoir Uncertainty Modeling; #90171 (2013)

Alister MacDonald, Kevin Zhang, Jan Inge Tollefsrud, Sasan Ghanbari, and Robert Chelak

Search and Discovery.com

... Depth Uncertainty The main sources of structural depth uncertainty include (1) velocity model; (2) time interpretation pick; (3) isochore thickness...

2013

Non-First-Break Solution for Shallow Velocity Anomaly Problem; #41602 (2015)

Emil Blias

Search and Discovery.com

... velocity analysis. We see large lateral stacking velocity fluctuations increasing with depth. An initial shallow velocity model was built, using...

2015

The Earthquake Process in Oklahoma; #80497 (2015)

Robert B. Herrmann, Han Su, Hao Guo

Search and Discovery.com

... velocity model for Green functions Grid search over strike, dip, rake and depth Mw=3.65, mLg=3.88, ML=4.10 5 Select frequency band for which record...

2015

Chapter Ten-part 2: Depth Conversion

Leslie R. Denham, Dave K. Agarwal

AAPG Special Volumes

... to depth without computing velocity. The results are very similar to using pseudovelocities, with the advantage of giving an estimate of the accuracy...

2011

Improved Structural Imaging of the Karama Seismic Survey Using Anisotropy Kirchhoff and Beam Depth Migration

Zbigniew Ostapiuk, Bee Jik Lim, Martin Bayly

Indonesian Petroleum Association

...Improved Structural Imaging of the Karama Seismic Survey Using Anisotropy Kirchhoff and Beam Depth Migration Zbigniew Ostapiuk, Bee Jik Lim, Martin...

2012

Velocity Conditioning for an Improved Depth Conversion, #40743 (2011)

Ang Chin Tee, M. Hafizal Zahir, M. Faizal Rahim, Nor Azhar Ibrahim, Boshara M. Arshin

Search and Discovery.com

... conversion to depth using 3D Hybrid Velocity 3D Grid...

2011

A Comparison of Depth Conversion Methods in Buntal Gas Field, Block B, Natuna Sea, Indonesia

Irfan Yuliandri Syukri, John Hughes, Medi Medianesterian

Indonesian Petroleum Association

... analysis shows residual RMS depth errors for each method are similar. For Beta-0, using Dix corrected stacking velocity gives the smallest error (11...

2014

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