Tomographic waveform inversion (TWI) applied to real seismic data

Jlio Oliva Frigrio, Biondo Biondi

International Meeting for Applied Geoscience and Energy (IMAGE)

... slant-stack Sθ; shift Mμ; local slant-spread S* , which is the adjoint of Sθ . The θ ˜ image I results from data migration with the input velocity...

UNDERSTANDING THE FRESNEL ZONE

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A New Approach to Imaging and Pore Pressure Analysis in Depth Domain in Complex Geologic Areas: Use of Rock Physics Constrained Velocity Modeling and Reverse-Time Migration

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Abstract: Migration of Velocity Spectra: An Example from the Philippines

Craig J. Beasley, Rolf Klotz

Geological Society of Malaysia (GSM)

...Abstract: Migration of Velocity Spectra: An Example from the Philippines Craig J. Beasley, Rolf Klotz 282 Geological Society of Malaysia - Petroleum...

Seismic Modeling of Porosity Distribution in a Miocene Reef, Salawati Island, Indonesia

William T. Valenta

Indonesian Petroleum Association

... constant velocity over the Salawati A field. Figure 2. Schematic Stratigraphic Section Feasibility Study There are some prerequisites for the detailed...

Abstract: Kirchhoff Imaging with Adaptive Greens Functions for Compensation for Dispersion, Attenuation, and Velocity Imprecision; #90187 (2014)

Andrew V. Barrett

Search and Discovery.com

... frequencies appear to propagate at the velocity of the asymptotic high frequency. If we know the attenuation constant ‘Q’, and if the model for attenuation...

An integrated workflow centered around elastic FWI for complex subsalt imaging using wide-azimuth data in the southern Gulf of Mexico

Hongyan Li, Riaz Alai, Nolan Brand, Frederico Xavier de Melo, Hugo Enrique Muñoz Cuenca, Wenmiao Liu, Iestyn Williams, Saeeda Hydal, Khaled Abdelaziz, Emmi Sanchez Vargas, Nik Nur Halim C Soh, M Shah B Sulaiman, Sandeep Kumar

International Meeting for Applied Geoscience and Energy (IMAGE)

..., manifesting as strong crosstalk after migration. Simultaneous volumetric subtraction was applied in this case study to remove the residual surface...

Representation of Bed Configurations in Depth-Velocity-Size Diagrams

John B. Southard

Journal of Sedimentary Research (SEPM)

... than one mean velocity at constant flow depth, basically because a low velocity can produce a very rough bed configuration (ripples or dunes...

Limitations of Reflection Seismograph

L. E. Nugent, Jr.

AAPG Bulletin

... increases or decreases the rigidity and compressibility because the density remains essentially constant. Even with ideal conditions of velocity control...

NMO Application in VTI Media: Effective and Intrinsic Eta (Geophysics Paper 6)

Joel Starr, Maz Farouki

Geological Society of Malaysia (GSM)

... Brazil. Values of ηeff range from 0 – 0.141. The ηeff field was determined by residual migration velocity analysis using the Alkhalifah NMO equation...

3D Seismic from Planning to Mapping

A. Kullerud, O. Nipen, H. E. Nordberg

Indonesian Petroleum Association

... migrated section representing a constant velocity layer. As can be seen the migration algorithm has worked properly. Due to spatial aliasing...

Abstract: Derivation of Seismic Depth Sections

H. Buchholtz, W. Houba

Geological Society of Malaysia (GSM)

... in the presence of dipping overburden layers. In this case of substantial lateral velocity variation, the result of time migration is already erroneous...

Abstract: Crosswell Imaging with LCB Beamlet, by Yueming Ye; Wu Ru-shan; Zhuang Xijin; #90163 (2013)

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An Experimental Study of Secondary Oil Migration (1)

LIONEL CATALAN, FU XIAOWEN, IOANNIS CHATZIS, and FRANCIS A. L. DULLIEN

AAPG Bulletin

... pressures are known for the saturations at which the oil just becomes disconnected. In most experiments, the migration front advanced at a constant rate...

Abstract: Seismic Velocity Model Building in from Area of Complex Geology, Southern Alberta, Canada, by H. Isaac and D. Lawton; #90090 (2009).

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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)

... is carried out through a heterogeneous velocity model. It is followed by a constant velocity map migration as the second step. Wave equation (Cheng and Zhang...

Extended Abstract: What is Wave Equation Pre-stack Depth Migration? An Overview

Andrew Long

Petroleum Exploration Society of Australia (PESA)

...Extended Abstract: What is Wave Equation Pre-stack Depth Migration? An Overview Andrew Long I TECHNICAL Focus What is Wave Equation Pre-stack...

PSDM for unconventional reservoirs? A Niobrara Shale case study; #80405 (2014)

Morgan P. Brown, Joseph H. Higginbotham, Cosmin Macesanu, Oscar E. Ramirez, Dave List, Chris Lang

Search and Discovery.com

... the magnitude of AVAZ response observed in the data. PSDM Velocity Analysis Rigorous, iterative velocity update proves key to the success of depth migration. We...

PSDM for Unconventional Reservoirs? A Niobrara Shale Case Study

Morgan P. Brown, Joseph H. Higginbotham, Dave List, Chris Lang

Unconventional Resources Technology Conference (URTEC)

... to the success of depth migration. We began with an interval velocity derived from prestack time migration (PSTM). We utilized a WEM algorithm...

Effective Use of High Density VSP Measurements to Predict Pore Pressure and Estimate Mud Weight Ahead of Drilling in the Mahakam Delta, Indonesia

Mohammed Badri, Stephane Gazet, Gregoire de Tonnac

Indonesian Petroleum Association

.... In this case the effective stress does not decrease but remains constant causing the velocity to appear as a plateau on a velocity versus depth plot...

Diving wave tomography: Velocity modelling using first arrival traveltime

Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu

Geological Society of Malaysia (GSM)

... constant velocity gather or quantitatively based on the semblance analysis. The latter involves the estimation of NMO velocities at discrete common...

Application of Wave Equation Tomography in Frontier Areas

Tien-when Lo, Guy W. Purnell

Indonesian Petroleum Association

... about complex local geology makes building an initial velocity model for seismic data migration difficult. We developed a wave equation tomography method...

Imaging Complex Structures in Colombia … Full Wave Equation Migration Approach

Hector A. Alfonso, Luis E. Rojas, Weizhong Wang, Jie Zhang, Oz Yilmaz

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... time migration of shot gathers, equivalently from the floating datum, using a range of constant velocities. Next, we combined the constant-velocity...

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

Nader C. Dutta, Sherman Yang, Jianchun Dai

Indonesian Petroleum Association

... GUIDED MIGRATION OF SEISMIC DATA IN 3D Nader C. Dutta* Sherman Yang* Jianchun Dai* ABSTRACT Conventional approaches to build velocity models for depth...

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

... incorrect depth migration results and can lead to velocity distortions during successive tomography-based model building. The problem is instead...