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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...

Using Reflected Phases to Improve Depth Resolution of Microseismic Source Locations from Single-Well Observations

James Rutledge, Nobukazu Soma

Unconventional Resources Technology Conference (URTEC)

... of trial depth positions, matched their arrivals to ray-trace arrivals from two distinct velocity boundaries while also honoring the direct P...

Petrophysical Classification of Siliciclastics for Lithology and Porosity Prediction from Seismic Velocities (1)

LEV VERNIK and AMOS NUR

AAPG Bulletin

... at comparable porosities to rocks in the first two groups. The compressional velocity-porosity relation for each of these groups is found to be linear...

Geological Applications of Reservoir Engineering Tools: PART 1

John Farina

AAPG Special Volumes

... changes moves into a formation at a well-defined velocity. -- The distance the transient has moved at any time is called depth of investigation...

Near-surface modeling by surface wave tomography inversion in oil and gas exploration

Wen Peng, Le Li, Zhonglin Cao, Guangying Wang, Pengfei Duan, Heng Zhang

International Meeting for Applied Geoscience and Energy (IMAGE)

... the ray path and travel time of the single frequency surface wave component, a tomographic inversion equation can be established to obtain a nearsurface...

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

... sec. Vrms were converted to Vint using the Dix equation (Dix, 1955). The solutions were forward modeled by constant-velocity ray tracing and compared...

Subsalt Imaging: An Integrated Approach to Image Improvement of Vintage Data, #42076 (2017).

Evans Owah, Christian Rivera, Marjolaine Lahmi, Michel Courbe

Search and Discovery.com

... prospects. Pre-stack depth migration has been known to help improve the seismic image around complex targets with sharp lateral velocity variations...

Amplitude and Bandwidth Recovery Beneath Gas Zones Using Kirchhoff Prestack Depth Q-Migration

Jonathan Liu, Peter Traynin, J. M. Reilly

Indonesian Petroleum Association

... Kirchhoff Prestack Depth Q-migration is efficient computation of traveltimes and amplitudes. Let c(x) be a complex velocity in a viscoacoustic medium...

Computation of phase velocity direction using normalized wavefields

Kwangjin Yoon, Jungkyun Hyun

International Meeting for Applied Geoscience and Energy (IMAGE)

... is same to the ray direction which is proportional to the energy propagation and phase velocity direction is normal to the wavefront. Poynting vector...

Simultaneous Joint Inversion of Seismic and Gravity Data for Long Offset Pre-Stack Depth Migration in Northern Oman, #41569 (2015).

D. Colombo, M. Mantovani, M. De Stefano, D. Garrad, Hussain Al Lawati

Search and Discovery.com

... of Bouguer anomaly) for improving velocity model building and the corresponding depth-domain seismic image. Introduction Effective depth imaging through...

Investigation of DMO Algorithms during Test-Line Processing: Some Recommendations

Ng Tong San, Mohd. Hashim Abas, Leong Lap Sau

Geological Society of Malaysia (GSM)

... not be used solely for suppressing high velocity linear noise and lessening back scattered energy. Other filtering options are available. INTRODUCTION...

Sensitivity analysis of acoustic waveform inversion to velocity anomalies in the near-surface using the Frchet derivative

Ao Cai, Colin A. Zelt

International Meeting for Applied Geoscience and Energy (IMAGE)

... 𝑠𝑠(𝒙𝒙) = 𝑣𝑣(𝒙𝒙), for simplicity. From equation (6), the high and low velocity anomalies are expected to generate same amplitude of wavefield perturbations...

Abstract: A Universal Equation to Calculate Shale Volume for Shaly-Sands and Carbonate Reservoirs; #90255 (2017)

David Soto, Rodolfo Soto, Oliver Pasquel, Duarry Arteaga, Johathan Soto

Search and Discovery.com

.... All non-linear relationships are more optimistic in that they produce a shale volume value lower than that from the linear equation. On the other hand...

Seismic Imaging through Outcropping Carbonates: An Example from the Canadian Rocky Mountains, , #41533 (2015).

Yong Hua, Don C. Lawton

Search and Discovery.com

... and replacement velocity for the surface layer. Linear Noise Attenuation Radial filters and FK filters were tested on shot gathers to enhance signal...

An Inverse Approach for Relating Seismic Velocity and Overpressure to Permeability and Sedimentation History in Deep Basins, #40863 (2012)

Hector M. Moreno, Tim A. Minshull, Rosemary A. Edwards,

Search and Discovery.com

... evolution with depth and an empirical law for the permeability as a function of porosity. Model output has been used to estimate the P wave velocity...

Multifocusing Stack Technique for Subsurface Imaging, #40749 (2011)

Sunjay Sunjay,

Search and Discovery.com

... constitutes a key first step that facilitates the estimation of a velocity model for depth imaging. For these reasons, improving the quality of time...

Crustal thickness and velocity structure of southern Peninsular Malaysia

Abdul Halim Abdul Latiff, Amin Esmail Khalil

Geological Society of Malaysia (GSM)

... the inverted waveform indicate a gradual velocity increment from Conrad boundary (around 10-12 km depth) to Moho thickness in both cases. The findings...

Pore-Pressure Prediction in the Permian Basin Using Seismic Prestack Inversion

Colin Sayers, Lennert den Boer

Unconventional Resources Technology Conference (URTEC)

... the compressional velocity of normally pressured sediments in equation (4) varies with vertical depth z [ft] according to: Vnormal [ft/s] = 106...

Abstract: Near Surface Anomalies and Solutions; #90211 (2015)

Todd Mojesky, David LeMeur, and Ali Karagul

Search and Discovery.com

... incorporates turning-ray tomography into its inversion engine. The near surface medium is divided into cells (grids), and a velocity is inverted uniquely...

The Challenge of Applying New Technologies to Exploration in a Sub Andean Basins

Marcelo Benabentos, Pedro Muñoz, Juan Uribe, Francisco Ortigosa, Dewi Jones

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... for near surface, Ray Tracing based survey design, Long offset-low fold seismic, and Wave Equation Migration in shot domain. The final goal is to reduce...

Abstracts: A Decomposition of RP into Contributions from single-parameter Reflectivities; #90173 (2015)

Kristopher A. Innanen

Search and Discovery.com

... obtain (10)             ,   which is equivalent to equation (3) evaluated for the 2-parameter, density/velocity case...

Chapter 4: Synthetic Seismograms and Their Uses

Tom Wittick

North Texas Geological Society

... reflector at a specific depth. In most cases the difference in acoustic velocity between rocks is the dominant factor in determining the reflection...

Synthetic Seismograms and Their Uses

Abilene Geological Society

... what the velocity would be if the rock at that depth were pure sand or pure shale. We then use the SP or gamma-ray log to determine the percent sand...

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)

... to phase velocity Cz and time and depth steps (Δt, Δz) as, ௭ ଴ Therefore, ௭ Using the absolute value of 1/p in the equation above produces a component...