Automatic Seismic-to-Well Tie by Restricted Adjustment of Sonic Logs; #42466 (2021)

Gabriel R. Gelpi, Daniel O. Pérez, Danilo R. Velis

Search and Discovery.com

... to a new synthetic trace that has a higher correlation with the observed data. The function is built using monotonic cubic splines interpolation...

A depth uncertainty estimation method using interval-domain anisotropic VTI velocity and travel time detectability criterion

Andrey H. Shabelansky, Cory J. Hoelting, Min Yang, Sizhuang Deng, Jinsong Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

...A depth uncertainty estimation method using interval-domain anisotropic VTI velocity and travel time detectability criterion Andrey H. Shabelansky...

Seismic Velocity Variations in San Joaquin Valley, California

Walter S. Olson

AAPG Bulletin

..., and the linear increase of interval velocity with depth. Both equations may be fitted to data by using least squares. These equations give the simplest...

Abstract: Seismic Imaging of Imbricate Structures in Mountainous Area: Case Studies; #90211 (2015)

Nanxun Dai, Oz Yilmaz, Weizhong Wang, and Jie Zhang

Search and Discovery.com

... for the near surface. We compute the traveltimes associated with all shot and receiver locations by ray tracing using the initial velocity depth model...

A Time Migration Before Stack

Richard Cooper, Malcolm Hobson

Geological Society of Malaysia (GSM)

... a more accurate velocity field for migration and depth conversion. The robust nature of the method allows its application to routine data processing...

Joint 4D full-waveform inversion using enhanced template-matching objective function

Gaurav Dutta, Emmanuel Saragoussi, Xin Cheng, Markos Sourial, Yongbo Zhai, Chirag Parekh, Denes Vigh

International Meeting for Applied Geoscience and Energy (IMAGE)

... of the 4D difference got distorted after alignment. Figure 4: (a) 4D RTM image using a common velocity model and without any alignment. (b) Calculated depth...

Abstract: Inexact Full Newton Method for Full Waveform Inversion Using Simultaneous Encoded Sources; #90187 (2014)

Amsalu Y. Anagaw and Mauricio D. Sacchi

Search and Discovery.com

... with depth used as starting model for inversion (b). (c) and (d) are reconstructed velocity model using simultaneous sources with 15 and 9 super-shots...

Measuring Behind Casing Water Flow

T. M. Williams

Indonesian Petroleum Association

... of the detector 1 to detector 2 count rates is an exponential function of the water velocity only. The linear water velocity is determined from...

Well Log Prediction Using Machine Learning

Sundeep Sharma

Oklahoma City Geological Society

... log will be referred to as the target data and the input logs will be referred to as feature data. By using multi-linear regression algorithm...

Wave and Bottom Sediment Interactions over a Submerged Sand Bank during the Winter Cold-Front Season, Western Louisiana

Daijiro Kobashi, Felix Jose, Gregory Stone

GCAGS Transactions

.... The relationship between shear velocity (U*) and turbidity (OBS) with linear regression line (left) and hypothetical parabolas with arbitrary "a" values...

The Role of Seismic Inversion Modeling in Describing Reservoir Characteristics: A Case Study

William C. Robinson

West Texas Geological Society

... and to interpret the slope of the line used to convert the velocity data to porosity data. A linear function was determined from the cross-plotted points...

Seismic imaging uncertainty using deep learning predicted Greens functions

Han Liu, Anar Yusifov, Muhong Zhou, Linda Hodgson

International Meeting for Applied Geoscience and Energy (IMAGE)

... are trained to predict the Green’s function associated with a single velocity model using both source and receiver data. We then use the trained...

Integration of Depth Conversion, Seismic Inversoin and Modeling Over The Belida Field, South Natuna Sea Block "B", Indonesia

Patrick Jonklaas

Indonesian Petroleum Association

.... Figure 5. Depth versus average velocity plot at the Lower Arang revealing a non-linear time depth function. Various time to depth conversion...

Velocity Analyses of Near Seafloor Strata Based on Multichannel Seismic Data from the Tonga Platform

Jeffrey E. Cole, Dennis M. Mann

Circum Pacific Council Publications

... and subsequent sorting into CDP gathers. An initial, or brute, stack was created for each line by applying an assumed subsurface velocity function...

Chapter 10-part 3: 3-D Depth Image Interpretation

William L. Abriel, Joseph P. Stefani, Robert D. Shank, David C. Bartel

AAPG Special Volumes

.... One very important concept that needs to be understood is the sensitivity of seismic imaging to variations in overlying earth velocity, and why depth...

Advanced CRS Application by Model Based Attribute Guidance

Search and Discovery.com

Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

.... For long offsets (offset/depth § 1.5 – 2.5), we can expect significant improvement of VRMS estimation using three-term velocity analysis, even though...

Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

.... For long offsets (offset/depth § 1.5 – 2.5), we can expect significant improvement of VRMS estimation using three-term velocity analysis, even though...

Petroleum Geologist and Exploration Geophysicist: Co-Ordination and Seismic Velocity

John D. Hale

CSPG Bulletin

... waves or, as usually taken into account, a velocity function involving the increase of velocity with depth based on the average of available data...

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...

A shallow velocity model building using full-waveform inversion on 3D onshore dataset

Young Seo Kim, Jewoo Yoo, Tong Fei, Ali Almomin

International Meeting for Applied Geoscience and Energy (IMAGE)

...A shallow velocity model building using full-waveform inversion on 3D onshore dataset Young Seo Kim, Jewoo Yoo, Tong Fei, Ali Almomin A shallow...

Fast and efficient structure-oriented preconditioning with on-the-fly dip estimation

Rodrigo Felicio Fuck, Lorenzo Casasanta

International Meeting for Applied Geoscience and Energy (IMAGE)

... is done), the estimated velocity standard deviations are mainly a function of the ray illumination of the seismic survey, as a comparison of Figures...

Elastic reverse-time migration without wavefield decomposition

Daiguang Li, Shengchang Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

... the nonlinear function related to m. According to equation (2), using observed wavefield to obtain the physical parameters of the subsurface model m is commonly...

A New Perspective to Shallow Water Flow (SWF) and Sinking Well-Head Preventions in Deep Water

Selim Simon Shaker

GCAGS Transactions

... the extent of the hydrodynamic zone B from seismic velocity is crucial to the pressure prediction. The depth to the start and end points of zone B...

Anisotropic Velocity Model of a Fractured Formation using a High Resolution VSP Survey and Forward Modeling

Search and Discovery.com

...Anisotropic Velocity Model of a Fractured Formation using a High Resolution VSP Survey and Forward Modeling Anisotropic Velocity Model...