An immersed boundary topography approach for TTI acoustic propagation

Edward Caunt, Rhodri Nelson, Tim MacArthur, Fabio Luporini, Gerard Gorman

International Meeting for Applied Geoscience and Energy (IMAGE)

... are Thomsen anisotropy parameters, s is a constant parameter used to stabilise the numerical scheme and prevent SV wavefront triplications...

Analyzing BeefŽ Fractures: Genesis and Relationship With Organic-Rich Shale Facies

Mohammed Al Duhailan, Steve Sonnenberg, Mark Longman

Unconventional Resources Technology Conference (URTEC)

... of isotropic or anisotropic layers (Thomsen, 1986). The values for static horizontal Young’s modulus are greater than the values for vertical Young...

PS reflection-based full-waveform inversion using single-mode propagator

Yongbo Zhai, James Xu, James Rickett, Peng Wang, Xin Cheng, Denes Vigh, Suyang Chen, Cara Smith

International Meeting for Applied Geoscience and Energy (IMAGE)

.... The Thomsen trick allows us to convert S-wave anisotropy parameters to their P-wave counterparts, enabling accurate S-wave propagation. Under the assumption...

Observations of Azimuthal Anisotropy in Prestack Seismic Data, #41572 (2015).

David Gray

Search and Discovery.com

... of the anisotropic variation in conjunction with the AVO variation in the data. This and more conventional methods are used to demonstrate the large degree...

The Magic of Depth Imaging in a Complex Geological Setting … A Case Study from Upper Indus Basin (Pakistan), #42330 (2018).

Syed Firasat Shah, Musharaf Sajjad

Search and Discovery.com

... as a simulated 3D dataset to generate a 3D velocity field to estimate Thomsen’s parameters and perform TTI-RTM. The mapping resulted in a completely different...

Ultrasonic wave velocities measurements and seismic anisotropy at Karari gold deposit: Implications for gold exploration

Andre Eduardo C. M. de Souza, Stephanie Vialle, Andrej Bona

Petroleum Exploration Society of Australia (PESA)

... directions as a first estimation of the anisotropy. The anisotropy was quantified by two of Thomsen´s anisotropic parameters: (1) ε, which refers...

3-D AVO Analysis and Modeling Applied to Fracture Detection in Coalbed Methane Reservoirs

Antonio C.B. Ramos, T.L. Davis

Rocky Mountain Association of Geologists

... and ratios from laboratory measurements. Anisotropic parameters were derived using expressions derived by Thomsen (1993) in his model for aligned cracks...

ABSTRACT: Estimation of Anisotropy Parameters Using Intrinsic Rock Properties in a Selected Swamp Field in Niger Delta; #90115 (2010)

Iheanyichukwu P. Okorie, Francesca Osaynade, Understanding Aikulola, Noble Tamunobereton-ari, Robinson S. Dike, Samuel Olotu, and Joseph O. Ebeniro

Search and Discovery.com

... (VTI) or polar anisotropy. This type of anisotropy can be quantified by estimating the three Thomsen parameters epsilon (ε), delta (δ), and gamma (γ...

First-arrival traveltime and slope tomography in tilted anisotropic media with undulant topography

Xiaole Zhou, Serge Sambolian, Gaoshan Guo, Stephane Operto, Haiqiang Lan, Ling Chen

International Meeting for Applied Geoscience and Energy (IMAGE)

... to TTI acoustic media, where the model space is parameterized by four anisotropic parameters (vv , ε, δ , θ ). Preliminary synthetic tests with complex...

Chapter 9: Microstructure and Anisotropy in Gas Shales

Carl H. Sondergeld, Chandra S. Rai, Mark E. Curtis

AAPG Special Volumes

...). The velocities were used to compute the Thomsen anisotropic parameters, ε, γ, and δ (Thomsen, 1986). The results for P-wave, ε, and S-wave, γ...

Seismic Guided Drilling (SGD*): A New Technology for Look-Around and Look-Ahead of the Bit Prediction During Drilling

Nader C. Dutta, Sherman Yang, Jianchun Dai, Aranya Bhaduri, S. Chandrasekhar, Firoze Dotiwala, C.V. Rao

Indonesian Petroleum Association

... template, that provides “upper and lower” bound to velocities , (3) accounting for anisotropic wave propagation by well known techniques such as Thomsen...

Stress-Dependent Flow, Mechanical, and Acoustic Properties for an Unconventional Oil Reservoir Rock

Gang Han, Marte Gutierrez, Peter Schmitz

Unconventional Resources Technology Conference (URTEC)

...’s modulus, acoustic velocities, six stiffness coefficients, and Thomsen anisotropy parameters are measured under different levels of loading and confining...

Abstract: Evaluating the Impact of Mineralogy on Reservoir Quality and Completion Quality of Organic Shale Plays, by Helena Gamero-Diaz, Camron K. Miller, Richard Lewis, and Carmen C. Contreras-Fuentes; #90169 (2013)

Search and Discovery.com

Depth Imaging „ Seeing the Invisible

Vetle Vinje

GEO ExPro Magazine

... expected in each layer in the model. Anisotropic depth models described by five parameters are now the state of the art and are often termed Tilted...

Seismic Imaging in Anisotropic Media. or... "A Better Way to Moveout and Migrate Long Offset Data"

Rolf Klotz, Martin Bayly, Sue Downie, Swee Leng

Indonesian Petroleum Association

...Seismic Imaging in Anisotropic Media. or... "A Better Way to Moveout and Migrate Long Offset Data" Rolf Klotz, Martin Bayly, Sue Downie, Swee Leng...

Assessing mineral composition and permeability of a shale seal

Roman Beloborodov, Marina Pervukhina, Maxim Lebedev, Juerg Hauser

Petroleum Exploration Society of Australia (PESA)

...le-dependent P-wave reflectivity, 𝜃 is the angle of incidence, 𝜀 and 𝛿 are the Thomsen’s anisotropy parameters (Thomsen, 1986). To obtain absolu...

Exploration of Deepwater Regions Offshore India

Roberto Fainstein, Rajesh Kalra

International Meeting for Applied Geoscience and Energy (IMAGE)

... such that velocity updates are done with large-scale length. Choice of scale length depends on lateral and vertical (anisotropic) velocity variations. For further...

Rock Physics Model of the Eagle Ford Shale

Colin M. Sayers, John J. Walsh, Kevin Fisher, Sagnik Dasgupta

Unconventional Resources Technology Conference (URTEC)

... medium can be described by the three anisotropy parameters ε , γ , and d of Thomsen (1986). These are defined by the following equations: ε = C11...

SV/SH or S1/S2 separation for 3D6C data with direct S-wave vibrator exciting once

Yuan Yuan Yue, Zhiwen Deng, Wenbo Zhang, Hequn Li, Jianlei Zhang, Lina Huo

International Meeting for Applied Geoscience and Energy (IMAGE)

... is azimuthally anisotropic and often abstracted as HTI, TTI, ORT or more complex model (Tsvankin, 2012). Crampin (1981) reviewed the wave motion...

Geological Considerations during Microseismic Monitoring, Processing, and Interpretation of Hydraulic Fracture Treatment

J. Le Calvez, S. Hanson-Hedgecock, P. Primiero, T. Al-Wadhahi, O. Harrasi

Unconventional Resources Technology Conference (URTEC)

... also to invert for Thomsen anisotropy parameters (ε, γ, δ) (Thomsen, 1986). In the inversion model times are obtained by ray tracing with an exact...

Poroviscoelasticity of The Eagleford Shale Depending on the Drilling Mud and Fracturing Fluid Chemistry

Search and Discovery.com

ABSTRACT: Effect of Anisotropy In Seismic Inversion In Shales; #90133 (2011)

Roderick Perez

Search and Discovery.com

... 5-10% due to horizontal stress, and VTI anisotropy values approach to 40%. This is in a field where the Thomsen’s (1986) parameters (ε, δ, and ¥) doesn...

Joint velocity and event location inversion workflow in microseismic reservoir monitoring

Takashi Mizuno, Joel Le Calvez, Manish Lal Khaitan, Giulia Barisione, Irina-Tulia Stoia, Prakash Ranjan, Stefano Clerico, Xinyuan Li, Zheyuan Huang

International Meeting for Applied Geoscience and Energy (IMAGE)

... the resolution that the initial velocity model has while intuitively controlling the resolution of the inverted model parameters and assessing...

Permeability, Porosity, and Shear-wave Anisotropy From Scaling of Open Fracture Populations

Randall Marrett

Rocky Mountain Association of Geologists

.... (Thomsen, 1995). © 2009 Rocky Mountain Association of Geologists 218 Ratidall Marrett A basic problem for theories of fluid flow and seismic...

Abstract: Physical Modeling for Azimuthal AVO Over a Simulated Fractured Medium; #90174 (2014)

Faranak Mahmoudian, Gary F. Margrave, and Joe Wong

Search and Discovery.com

... for estimation of the Thomsen anisotropy parameters; the AVAZ inversion is presented elsewhere. Here we describe the acquisition of the P-wave physical...