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The AAPG/Datapages Combined Publications Database

Showing 473 Results. Searched 195,354 documents.

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Simple Models for the Stress-Dependence of Anisotropic Seismic Velocities in Fractured Rock; #120053 (2012)

Richard L. Gibson, Jr. and Kai Gao

Search and Discovery.com

... dry and fluid-saturated Thomsen’s parameters: Phys. Earth planet. Inter., v. 172, p. 116-124. Maultzsch, S., M. Chapman, E. Liu, and X.Y. Li, 2003...

2012

Seismic Anisotropy VTI Modeling and Mechanical Properties of Kerogen in Gas Shale, #42486 (2020).

Anggoro S. Dradjat, Agus Djamil, M. Firwan Aprizal

Search and Discovery.com

... than zero. Second parameters for measuring mechanical anisotropy is gamma or S wave velocity Thomsen parameter which is measuring difference...

2020

Abstracts: Seismic Wave Propagation and Imaging in Heterogenous Media; #90173 (2015)

Yijian Meng, Emmanuel Bongajum, and Bernd Milkereit

Search and Discovery.com

... for transverse isotropy. Thompsen (1986) showed that anisotropy parameters can be used to come up with an equivalent homogeneous anisotropic model...

2015

Enabling the Next Generation of Hydrocarbon Exploration

Stefano Volterrani, Tim Matava, Zakir Hossain, Shihong Chi, Brian W. Horn

GEO ExPro Magazine

... choice of Thomsen parameters (Figure 2). The traditional approach for building an anisotropic model is to use checkshot or sonic log data and isotropic...

2018

Workflow for Nonlinear AVO Inversion to Estimate Seismic Anisotropy and Geomechanical Properties of Shale

Un Young Lim, Richard L. Gibson Jr., Nurul Kabir

Unconventional Resources Technology Conference (URTEC)

... with Thomsen's parameters (Thomsen, 1986), bulk density, and kerogen volume fraction for ten different shale formations. The values are originally collected...

2019

Abstract: Elastic Full Waveform Inversion For Land Walkaway VSP Data; #90224 (2015)

Olga Podgornova, Scott Leaney, Marwan Charara, and Eric von Lunen

Search and Discovery.com

... velocities VP 0 / V , density  , and Thomsen anisotropic parameters  ,  (Thomsen, 1986). We exploit an axial symmetric approximation...

2015

Multi-Azimuthal Walkway VSP for Full Azimuth Seismic Calibration

Konstantin Galybin, Anastasia Poole, Michael Giles

Petroleum Exploration Society of Australia (PESA)

..., processing and use of such survey for validation and calibration of processing parameters and inversion results of a recent pointsource/point-receiver...

2016

3-D Geomechanical Modeling for Field Development of a Colombian Shale Play

Leonardo Arias Medina, Azra N. Tutuncu

Unconventional Resources Technology Conference (URTEC)

... and 5), and Thomsen’s parameters, Mpsi (track 6). The static geomechanical properties are calculated using the dynamic elastic properties, shale...

2019

Abstracts: Determining Elastic Constants of an Orthorhombic Material by Physical Seismic Modeling; #90173 (2015)

Faranak Mahmoudian, Gary F. Margrave, P. F. Daley, and Joe Wong

Search and Discovery.com

... model. The Thomsen parameters (ε, δ, γ) are calculated from elastic constants and presented in Table (2). Table (1): Density normalized elastic...

2015

Abstract: An Effective Medium Model for a Fractured Carbonate Reservoir Undergoing CO2 Flood at Weyburn Field, Saskatchewan; #90174 (2014)

Chris Blackwood

Search and Discovery.com

... effective medium, and Thomsen parameters (1986) are calculated and employed in the Ruger equation (1996) to understand amplitude variation with offset...

2014

Optimized characterization workflow for naturally fractured reservoirs using seismic anisotropy attributes in the Middle Magdalena Valley basin, Colombia

Oscar Moreno, Enrique Casaña, Luis Figuera, Iván Higuera, Diego García, Jorge Acosta, Benjamin Roure

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Downton, J. E., and B. Roure, 2015, Interpreting azimuthal Fourier coefficients for anisotropic and fracture parameters: Interpretation, 3, no. 3, ST9...

2023

Estimation of Total Organic Carbon (TOC) Content of Shale from AVO Inversion: A New Crossplot Approach Based on Zoeppritz Equations

Un Young Lim, Richard Gibson Jr., Nurul Kabir

Unconventional Resources Technology Conference (URTEC)

... using the full Zoeppritz solutions for reflection amplitudes. The inversion can correctly estimate five different parameters of anisotropic media like...

2019

Anisotropic Assessment of Middle and Lower Bakken Formations using Multi-Physics Measurements

Gama Firdaus, Valeria Suarez, Kurt Livo, Jyoti Behura, Manika Prasad

Unconventional Resources Technology Conference (URTEC)

... be extended to other geophysical parameters that are related to pressure, such as Thomsen’s anisotropy parameter, real conductivity, imaginary...

2020

Semiautomated Lateral Landing Advisor for On-Time Decisions Utilizing Digital Borehole Sonic Services and Next-Generation Cloud-Based Fracturing Design

Edgar Velez, Juan David Estrada, Adam Donald, Romain Prioul, Ting Lei, Erik Wielemaker, Violeta Lujan

Unconventional Resources Technology Conference (URTEC)

... on four parameters: mud velocity and Thomsen’s ,  and (two parameters are assumed to be known and used as input: one compressional and one shear...

2021

Estimating Stimulation-Zone Anisotropy Effects During Microseismic Monitoring

Martin Karrenbach, Steve Cole, Victor Yartsev

Unconventional Resources Technology Conference (URTEC)

... exhibit anisotropic behavior at larger seismic scales. We extract anisotropy parameters epsilon, delta, and gamma (Thomsen parameters) from the upscaled...

2015

Abstract: Velocity Model Calibration Effects on Microseismic Locations; #90187 (2014)

J. Akram and D. W. Eaton

Search and Discovery.com

... with different levels of VTI in shale layer. The anisotropy parameters are considered in the range of 0-20% (weak anisotropy). In Thomsen parameters, γ...

2014

Abstract: Improving Borehole Instability Analysis by Investigating the Impacts of Stress and Rock Anisotropy; #90224 (2015)

Qing Jia, Douglas Schmitt, Inga Moeck, and Randy Kofman

Search and Discovery.com

...). As illustrated in Figure 3, despite the fact that this material is relatively anisotropic (Thomsen ε = 0.25, γ = 0.17, δ = 0.25), the stress...

2015

Using Sonic and Resistivity Effective Medium Theories to Quantify the Influence of Rock Fabric on the Mechanical Properties of Organic Mudrocks

Paul Sayar, Carlos Torres-Verdín

Unconventional Resources Technology Conference (URTEC)

... of the rock penetrated by the well. Thomsen’s parameters (1986), URTeC 2142775 9  and  , are used to estimate the degree of anisotropy of the rock where...

2015

Abstract: Velocity Updating for Converted-Wave Prestack Time Migration; #90211 (2015)

Xiaogui Miao

Search and Discovery.com

.... For isotropic media, setting χeff to zero reduces velocity updating to two parameters, Vc and γeff. In this abstract, I will discuss only the anisotropic case...

2015

Anisotropy Kinematics Clarified through Regime Rrays Model

William J. Vetter

Search and Discovery.com

...“ in the conventional ray theory sense are involved in wavefront progression when triggered by idealized impulse excitation at a point source in an anisotropic...

Unknown

Anisotropy Kinematics Clarified through Regime Rrays Model

William J. Vetter

Search and Discovery.com

...“ in the conventional ray theory sense are involved in wavefront progression when triggered by idealized impulse excitation at a point source in an anisotropic...

Unknown

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

Nader C. Dutta, Sherman Yang, Jianchun Dai

Indonesian Petroleum Association

... of well calibration due to unreliable anisotropic parameter estimation (epsilon and delta; Thomsen, 1986), (4) The difference between seismic processing...

2012

Abstract: Anisotropy Measurements in a Multi-faced Core Sample by using Pulse Transmission Method; #90174 (2014)

Jaime Meléndez Martínez, Douglas R. Schmitt, and Randolph Kofman

Search and Discovery.com

... elastic constants Thomsen (1986) developed the so-called “Thomsen parameters” to quantified anisotropy in a VTI medium: (9) (10...

2014

What Are You Interpreting? Your Seismic Image Could Be Misleading You!

R. T. Newrick, E. P. Gomez, J. K. Pullishy, S. D. Jensen, J. M. de Armas

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... model, Vεδθ, in the case of anisotropy, specifically transverse isotropy that may be described using the Thomsen parameters ε and δ (Thomsen, 1986...

2006

Abstract: The Evolving Role of Geophysics in Exploration. From Amplitudes to Geomechanics (Paper C7)

E. C. Andersen, D. Gray

Geological Society of Malaysia (GSM)

... and fluids from seismic data. (Figure 2). Thomsen (1985) simplified the concept of seismic anisotropy, the variation of physical properties in different...

2012

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