Acoustic method of through-tubing cement bond evaluation based on Mie resonances

Search and Discovery.com

Getting Something for Nothing: Noise Attenuation in an Aliased World; #41291 (2014)

David C. Henley

Search and Discovery.com

... energy. The offending noise can then be effectively estimated and removed by application of various processing techniques. Even when the noise wavefronts...

ABSTRACT: Applications of Cross-Borehole Seismic Tomography to Monitor EOR Displacement Fronts in Heavy-Oil Fields of Kern County, California, by P. R. Hutt, J. H. Justice, A. A. Vassiliou, P. S. Cunningham, S. Singh, J. Bulau; #91003 (1990).

Search and Discovery.com

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

Sunjay Sunjay,

Search and Discovery.com

... in the conventional CMP stacking. Analytical expressions (based on the spherical representation of wavefronts) describe the moveout correction...

G. Non-Normal Incidence Reflections and the Determination of Lithology - Use of Shear Waves and Amplitude with Offset

Norman S. Neidell

AAPG Special Volumes

... not enough energy in the system to accomplish this. Hence, by bending raypaths (refracting) and wit different modes of motion (shear and compression...

Abstract: Prestack Signal Enhancement by Non-hyperbolic MultiFocusing; #90187 (2014)

Evgeny Landa, Alex Berkovitch, and Kostya Deev

Search and Discovery.com

... angle of the normal ray β and the radii of curvature Rcre and Rcee of the two fundamental wavefronts, namely, normal incident point and normal waves...

Compressive sensing framework using the linear radon transform for 3D ultrasonic data reconstruction in a pinch-out reservoir model

Pedro C. de Assis, Romulo B. da Silva, Irineu A. Lima Neto, Alan C. Galante, Alexandre L. Campi, Alessandro R. de Oliveira, Roseane M. Missagia, Marco A. R. Ceia

International Meeting for Applied Geoscience and Energy (IMAGE)

... summation over straight lines with the integration paths constrained by the ray parameters; moreover, transforming planar wavefronts into peaks in the Radon...

Know Before You Go!

Lars Zühlsdorff, Trond Haugland

GEO ExPro Magazine

... words, wavefronts rather than rays are propagated through the model, which is much closer to what is happening in the field (and much more efficient...

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)

... 𝜃0 = Figure 1: qP and qSv wavefronts for the Greenhorn Shale (Thomsen and Dellinger, 2003): γ0 = 2.05, ε = 0.256 and δ = –0.05. The qP phase angle...

Abstract: Spectral-element Simulations of Elastic Wave Propagation in Exploration and Geotechnical Applications; #90187 (2014)

Lin Zheng, Qi Zhao, Qinya Liu, Bernd Milkereit, and Giovanni Grasselli

Search and Discovery.com

... for all simulations are shown on the right panels with wavefronts identified and labeled. The effects of water layer and the salt-dome geometry are clearly...

Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015)

Hassan Khaniani and John C. Bancroft

Search and Discovery.com

... wavefronts initiated from the scatter point for times of 0.3s, 0.6s and 0.9s are computed. After applying a band pass filter by frequencies of 0 Hz...

High-EffortŽ Seismic Acquisition: Improving Image Detail; #41568 (2015)

David C. Henley, Kevin Hall, Henry Bland, Eric Gallant, Gary Margrave, Malcolm Bertram

Search and Discovery.com

... provided by horizontally summed geophone arrays whose antenna pattern preferentially admits vertically travelling reflection wavefronts, rather than non...

Poro-acoustoelasticity FD simulation of elastic wave propagation in prestressed porous media

Haidi Yang, Li-yun Fu

International Meeting for Applied Geoscience and Energy (IMAGE)

...avefield snapshots for different values of uniaxial stress P are shown in Fig. 4. We see that the S, fast-P, and slow-P wavefronts deforme...

The Array Sonic .... A New Technique for Acoustic Measurements

A. James

Indonesian Petroleum Association

... part causes wavefronts which develop in the formation. A typical waveform is shown in Fig. 2. Figure 2. Array sonic waveforms Two wavefronts...

Seismic Exploration Using Shear Waves

R. Garotta

Indonesian Petroleum Association

... paths are not exactly perpendicular to the wavefronts. But it gives an idea of the anisotropy in the layer. Fig. 17 Figure 17. "S" Wavefront The same...

An acoustic wave equation with the gradients of velocity and density

Jianyong Bai, Orhan Yilmaz

International Meeting for Applied Geoscience and Energy (IMAGE)

...flectivity caused by the velocity impact the wavefields and synthetic data both in amplitude and in phase. For example, the wavefronts indicated by the red...

3D anisotropic seismic simulation for fracture prediction in Sichuans Wufeng shale gas reservoirs

Xiang Li, Ziduo Hu, Chunhui Xie, Yancan Tian, Wei Liu, Xinyu Fang, Gang Yao

International Meeting for Applied Geoscience and Energy (IMAGE)

.... These snapshots reveal distinct propagation characteristics: in the VTI scenario, wavefronts propagate faster horizontally, while in the HTI media...

Accelerated deep learning-based estimation of wavefront dips and curvatures and their application to 3D prestack data enhancement

Kirill Gadylshin, Ilya Silvestrov, Andrey Bakulin

International Meeting for Applied Geoscience and Energy (IMAGE)

... of normal and normalincidence-point wavefronts at zero offset are used in the common-reflection-surface (CRS) method to produce stacking seismic sections...

EXTENDED ABSTRACT: From Isotropic to Tilted Transverse Isotropic Pre-Stack Depth Migration

Nicolas Chazalnoel

GCAGS Transactions

... seismic data with higher accuracy. For anisotropic medium, the seismic wavefronts travel with different velocities in different directions. The so-called...

Application of VTI PSDM for imaging carbonate structures

Seyed Yaser Moussavi Alashloo, Deva Ghosh, Yasir Bashir, Amir Babasafari

Geological Society of Malaysia (GSM)

..., the comparison of traveltime contours shows that the anisotropic wavefronts for area with strong anisotropy Figure 2: (a) L1 velocity model, and (b) A few...

III. Processing For Preservation of Seismic Amplitudes

Norman S. Neidell

AAPG Special Volumes

... are, of course, a natural consequence of spreading wavefronts and would occur whether or not reflecting interfaces or velocity gradients were present...

Abstracts: Microseismic Event Models from Finite-differencing with Corrections; #90173 (2015)

Peter M. Manning

Search and Discovery.com

... in Figure 4 shows the wavefronts which have propagated from a source at the left plot edge, and in the centre of the narrow low velocity zone across...

5-D Interpolation Compensates for Poor Sampling, by Daniel Trad; #41504 (2014).

Search and Discovery.com

Past and Present-Day Coastal Changes between Kuala Sungai Besar and Kuala Besar, Kelantan Darul Naim

J. K. Raj, Ismail Yusoff, Wan Hasiah Abdullah

Geological Society of Malaysia (GSM)

... and Kuala Besar; this recession due to a northwest directed littoral drift that results from the oblique approach of wavefronts from the South China Sea...

Angle-constrained VSP least-squares reverse-time migration based on a high-efficiency stabilized Poynting vector

Xuan Ke, Mauricio Sacchi, Ying Shi

International Meeting for Applied Geoscience and Energy (IMAGE)

...ned at 1.5 km in the horizontal direction. The receiver wavefield generates two wavefronts, propagating towards both sides of the borehole, as observed ...