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The AAPG/Datapages Combined Publications Database
Showing 527 Results. Searched 200,663 documents.
Elastic Anisotropy of Shales Revisited; #41557 (2015)
Marina Pervukhina, Patrick N. J. Rasolofosaon
Search and Discovery.com
.../diagenesis. Definition of the Considered Anisotropic Parameters All the considered rock samples are assumed transversely isotropic (TI...
2015
Acoustic Log Measurements in the Lower Eagle Ford Formation in Brazos and Robertson Counties, Texas and Their Implications on Completion Design
Richard Reischman, Scott Brooks, Trevor Willms, Tony L. Albrecht, John J. Walsh, Edgar Arteaga
Unconventional Resources Technology Conference (URTEC)
... were “verticalized”. URTeC 2152866 11 Figure 9: Thomsen’s parameters, Dynamic Stiffness coefficients (Cij), anisotropic mechanical properties...
2015
Anisotropic full-azimuth velocity model building using joint reflection-refraction tomography
Matan Shustak, Itai Sharabi, Orly Kletenik-Edelman, Elive Menyoli, Ike Imala, Ronit Levy, Zvi Koren
International Meeting for Applied Geoscience and Energy (IMAGE)
... were derived from a prior isotropic refraction tomography and extracted well information of the anisotropic parameters: Thomsen delta, and epsilon...
2022
Abstract: Practical Applications of Seismic Anisotropy; #90187 (2014)
Philip Wild
Search and Discovery.com
... to the noisy nature of the shear-wave arrival. The output from these inversion schemes is generally in terms of Thomsen’s (1986) ε, γ, and δ parameters...
2014
Exact kinematic behavior of the P-SV converted wave in a vertical transversely isotropic medium
Guillaume Cambois
International Meeting for Applied Geoscience and Energy (IMAGE)
... −𝐶44 2𝐶33 < 1 (5) 2 The Thomsen parameters are: 𝜀= 𝛿= 𝐶11 −𝐶33 2𝐶33 (𝐶13 +𝐶44 )2 2𝐶33 (𝐶33 −𝐶44 ) ≥ −𝛿0 (6) − 𝛿0 ≥ −𝛿0 (7...
2023
Anisotropy Analysis in Shale Using Advanced Sonic Data - Bakken Case Study, #41049 (2012)
Mehdi Ostadhassan, Zhengwen Zeng, Hadi Jabbari
Search and Discovery.com
.... Considering shales as being vertically transverse isotropic (VTI), three Thomsen anisotropy parameters with five independent stiffness coefficients...
2012
VTI anisotropic stiffness tensor logging: A case study
Kristoffer Walker, Alexei Bolshakov, Gama Firdaus, Tim Fischer, Luca Duranti, Luisa Crousse, Mason Edwards
International Meeting for Applied Geoscience and Energy (IMAGE)
... a workflow is provided for obtaining Thomsen VTI parameters (ϵ, γ, and δ) as a function of depth. First, highresolution sonic log processing reduces thin...
2024
Analysis of the influence of bedding-parallel cracks on shale anisotropy based on stress-induced rock physics model
Ying Xu, Feng Zhang, Guohua Niu, Xiangyang Li
International Meeting for Applied Geoscience and Energy (IMAGE)
...-parallel crack density (ex-situ), P-wave velocity, S-wave velocity, bulk density, Thomsen’s anisotropy parameters and , from left to the right). (b...
2024
Anisotropy template for transversely isotropic rocks
Gama Firdaus, Arkhat Kalbekov, Jyoti Behura, Manika Prasad
International Meeting for Applied Geoscience and Energy (IMAGE)
.... The anisotropy template can be utilized to (a) narrow the range of anisotropic parameters for known mineralogy and texture, (b) predict the texture of the rock...
2022
Seismic Imaging and Interpretive Model Building in the Colombian Andes
Rob Vestrum
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
...-traveltime raypaths for offsets ranging from zero to 2000 metres through a 1000-metre-thick TTI medium dipping 15°. The anisotropic parameters used...
2006
P- and PS-Wave Vector Wavefields for Anisotropic Petrophysics
James Gaiser
Petroleum Exploration Society of Australia (PESA)
.... Thomsen, L., 2013, On the use of isotropic parameters λ, E, ν, K to understand anisotropic shale behavior: 83rd Ann. Internat. Mtg., SEG, Exp. Abs...
2016
Jointly data and model driven pre-stack inversion of elastic and anisotropy parameters in HTI media
Xin Zhang, Jianhua Geng
International Meeting for Applied Geoscience and Energy (IMAGE)
... inversion of anisotropy parameters relies on an approximation formula for reflection and transmission coefficients in anisotropic media. However...
2024
Machine learning-based anisotropy characterization of Wolfcamp shales in the Midland Basin
Jaewook Lee, David E Lumley
International Meeting for Applied Geoscience and Energy (IMAGE)
... shale-specific reservoir properties more accurately. In general, we can quantify the elastic stiffness coefficients and Thomsen anisotropy parameters...
2022
The calculation of first-arrival P-wave traveltime for attenuating TTI media
Mengxiu Wang, Jingyi Chen, Zhengcong Zhao, Kaiyuan Ji, Shaoying Chang
International Meeting for Applied Geoscience and Energy (IMAGE)
... to describe the anisotropy of attenuation coefficient for plane waves in attenuative anisotropic media. The introduction of Thomsen-style notation...
2022
Abstract: 3D–3С Full-Wave Modeling in Anisotropic 2.5D Medium; #90171 (2013)
A. Kostyukevych, N. Marmalevskyi, Y. Roganov, and V. Tulchinsky
Search and Discovery.com
... in 2.5D modeling. Let us have a model consisting of two HTI anisotropic layers with the following parameters: the upper layer anisotropic axis...
2013
New stability constraints for pseudo-acoustic finite difference TTI modelling and inversion
Rodrigo Fuck, Lorenzo Casasanta, Marcel Nauta
International Meeting for Applied Geoscience and Energy (IMAGE)
... that the Thomsen parameters throughout the model satisfy the condition that (𝜀 − 𝛿) ≥ 0, which is not always true in practice. Usually, one...
2024
Anisotropic Pre-Stack Depth Migration in the Cusiana and Cupiagua Sur Fields
J. Checa, M. Mesa, N. Burke, J. Calderon, H. Alfonso, U. Egozi, B. Ver West, M. Yates
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... ANISOTROPIC CONSIDERATIONS Anisotropy was addressed using Thomsen’s approach (Thomsen, 1986), in which four parameters are required, besides the vertical...
2006
TTI Wave Equation Migration by Phase-Shift Plus Interpolation
Richard A. Bale
Search and Discovery.com
... (1) where VP0 is the velocity parallel to the symmetry axis (vertical for VTI), K Thomsen (1986) parameters H and G, and Vnmo V P 0 1 2G...
Unknown
TTI Wave Equation Migration by Phase-Shift Plus Interpolation
Richard A. Bale
Search and Discovery.com
... (1) where VP0 is the velocity parallel to the symmetry axis (vertical for VTI), K Thomsen (1986) parameters H and G, and Vnmo V P 0 1 2G...
Unknown
Abstract: Converted-wave Time Imaging Nuts and Bolts; #90187 (2014)
Shaowu Wang, Thomas Hollis, and Wayne Nowry
Search and Discovery.com
... and Exhibition, SEG, Extended Abstracts. Thomsen, L., 1999, Converted-wave reflection seismology over inhomogeneous, anisotropic media: Geophysics, 64...
2014
Polynomial Amplitude versus Azimuth Inversion in Horizontally Transverse Isotropic Media, as Tested on Fractured Coal Seams in the Surat Basin
Joseph Kremor, Randall Taylor, Khalid Amrouch
Australian Petroleum Production & Exploration Association (APPEA) Journal
... the assumption of weak anisotropy. A method of calculating Thomsen’s weak anisotropy parameters using these AVO gradient terms is then outlined. Compared...
2017
Geomechanical Evaluations of Deep Shale Gas Reservoir in Sichuan Basin, Western China
Xing Liang, Kaibin Qiu, Honglin Shu, Zhuo Zhang, Yufeng Luo, Yuanwei Pan, Qingfei Li, Kaigui Yin, Gaocheng Wang,Yan Gao
Unconventional Resources Technology Conference (URTEC)
... isotropic and vertically anisotropic (TIV), shales require 5 independent stiffness parameters to characterize their anisotropic mechanical properties...
2020
ABSTRACT: Anisotropic PP and PSv Prestack Depth Migration of 4C _OBC_ Seismic Data, Pamberi, Offshore Trinidad
Tony Johns, Carmen Vito and Raul Sarmiento
Geological Society of Trinidad & Tobago
... a qualitative correlation between derived parameters and attributes from P and Sv anisotropic migration velocities and known regional geology...
2007
Abstract: 3D, Anisotropic Phase Shift Operators; #90171 (2013)
Robert J. Ferguson and Gary F. Margrave
Search and Discovery.com
... [ 2 1 ] . I 2 Elastic parameters , , and slow-direction velocities 0, 0 are unique for geologic media (Thomsen, 1986...
2013
Abstract: 3D, Anisotropic Phase Shift Operators; #90171 (2013)
Robert J. Ferguson and Gary F. Margrave
Search and Discovery.com
... [ 2 1 ] . I 2 Elastic parameters , , and slow-direction velocities 0, 0 are unique for geologic media (Thomsen, 1986...
2013