Abstract: Investigations of Seismic Signatures of CO2 Saturation as Part of a Geological Storage Project; #90187 (2014)

Gautier Njiekak, Douglas R. Schmitt, and Randolf S. Kofman

Search and Discovery.com

.... First, both the P- and S-wave speeds decrease substantially as the CO2 transforms from gas to either liquid or supercritical phase. This observation...

Abstract: Estimation of Dispersive Parameters of Surface Wave Using the Generalized S Transform; #90187 (2014)

Roohollah Askari and Robert J. Ferguson

Search and Discovery.com

... operator Assuming that a geometrical spreading correction (cylindrical divergence) for the surface wave has been applied, if h1(τ) is the wavelet...

Acoustic/elastic wavefield injection and reconstruction from ocean-bottom data for elastic RTM

Bingkai Han, Weijian Mao, Xiao-Bi Xie

International Meeting for Applied Geoscience and Energy (IMAGE)

... as different types of boundary values of wave equation, and injected into wave propagators during the migration imaging process. The property...

Data processing workflow for reflections from cement-formation interface in ultrasonic pitch-catch measurement in cased hole

Shaopeng Shi, Hua Wang, Meng Li, Aihua Tao

International Meeting for Applied Geoscience and Energy (IMAGE)

... the attenuation of the casing flexural wave (primary A0) and reflection waves from the cement-formation interface (TIE). Although the TIE is critical...

Premigration attenuation analysis and mapping to image domain by weighted migrations

Yonghe Sun, Chunling Wu, Mark Fan, Zhemin Tan

International Meeting for Applied Geoscience and Energy (IMAGE)

... research area for seismic imaging and amplitude-versus-angle (AVA) analysis. According to Aki and Richards (2002, equation 5.94), attenuation can...

Estimation of Seismic Attenuation (Q): More Insight from Zero-Offset VSP

Mohammad Risyad

Indonesian Petroleum Association

... side of equation (2) versus frequency is performed. The slope, m can be expressed in Q-factor, Q as: 3. compressional wave attenuation is usually...

Concave Sand Grains in Eolian Environments: Evidence, Mechanism, and Modeling

B. T. Werner , E. Merino

Journal of Sedimentary Research (SEPM)

..., DURAND, J., AND MERINO, E., 1990, Water-transfer cylindrical structures in the Late Proterozoic eolian sandstones in the Taoudeni Basin, West Africa...

Modeling of scattering losses using energy transport

Manuel Alejandro Jaimes Caballero, Roel Snieder

International Meeting for Applied Geoscience and Energy (IMAGE)

... the compensation to the rest of the data set. The second approach consists on forward modeling of the attenuated wavefield via the wave equation...

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)

... be considered a special form of equation (3). To demonstrate this, we utilize a plane-wave solution of the acoustic wave equation: ̂∙𝐱 𝐧 ̃(𝐱, 𝑡) = 𝐴c...

Evaluation of Seismic Exploration in Sub-Volcanic Reservoir Area by Synthetic Seismic Modeling

Yulia Nur Fajrina, Muhammad Ghazalli

Indonesian Petroleum Association

... at the processing. Then spherical divergence correction is applied because there is attenuation caused by interval and geometry of wave propagation...

Modelling pure qP-wave in attenuative VTI media using fractional viscoacoustic wave equation

Shanshan Zhang, Kun Tian, Ning Qin, Yanguang Wang, Changbo Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

...Modelling pure qP-wave in attenuative VTI media using fractional viscoacoustic wave equation Shanshan Zhang, Kun Tian, Ning Qin, Yanguang Wang...

The Axial Ratio C/B as an Indicator of shape Selective Transportation

Luis A. Spalletti

Journal of Sedimentary Research (SEPM)

... from those of discoidal and bladed form, and the geometricity ratio is given by the equation [rods % + spherical %]/[discs % + blades...

Basin-Filling Models: Chapter 9

Charles L. Angevine, Paul L. Heller, Chris Paola

AAPG Special Volumes

... systems, major additional independent variables include the wave climate, distribution of wind-driven currents, eustatic sea level, and the various...

Use of Layered Formation Models in Deformation Analysis; #40853 (2011)

Eric Davis

Search and Discovery.com

... for smaller contrasts. For this work, the perturbation model was coded in Matlab, and the surface integral was written using cylindrical coordinates, which...

Abstract: A Phase Shift Plus Interpolation Extrapolation for Two-way Wave Equation Migration; #90172 (2014)

Jianhua Pan

Search and Discovery.com

...Abstract: A Phase Shift Plus Interpolation Extrapolation for Two-way Wave Equation Migration; #90172 (2014) Jianhua Pan AAPG Search and Discovery...

Abstract: High Quality Acoustic and Elastic Modeling; #90187 (2014)

Y. Jewoo, C. S. Shin, and R. P. Bording

Search and Discovery.com

... modeling accomplishes our goal of using the complete wave equation. But all of these techniques are compute intensive and much effort is required...

Abstract: Converted Wave Shot Profile Wave Equation Migration Toolbox Kit; #90224 (2015)

Mark Ng

Search and Discovery.com

...Abstract: Converted Wave Shot Profile Wave Equation Migration Toolbox Kit; #90224 (2015) Mark Ng Datapages/Search and Discovery Article #90224...

Abstract: Microseismic Event Locations for Deviated Boreholes; #90187 (2014)

Amna Feroz and Mirko van der Baan

Search and Discovery.com

... location is solved. One of the main advantages of using S-P travel time is evident from equation (4) and (5) (4) (5) Hence source location coordinates...

Vertical Seismic Profiling--A Measurement that Transfers Geology to Geophysics: Chapter 2

B. A. Hardage

AAPG Special Volumes

... spherical divergence, such as dispersion, S-wave conversions, and scattering. One can establish the accuracy of amplitude processing near a VSP well...

Sorting of Sediments in the Light of Fluid Mechanics

Douglas L. Inman

Journal of Sedimentary Research (SEPM)

... in suspension are spherical, of diameter d, and of the same specific gravity, then the settling velocity of the particles (equation 8) is a function of d only...

The emergence and impact of scientific machine learning in geophysical exploration

Umair bin Waheed

International Meeting for Applied Geoscience and Energy (IMAGE)

... as a forward solver for the eikonal equation and the wave equation. For example, Waheed et al. (2020) and Smith et al. (2020) showed how PINNs could be used...

Predicting pressure-dependent velocities for carbonates by linking static and dynamic elastic properties

Xuan Qin, De-hua Han

International Meeting for Applied Geoscience and Energy (IMAGE)

..., which could be caused by the unconnected pores in the rock framework or the wave scattering of the ultrasonic measurement. The velocityporosity...

A double double-porosity model for wave propagation in patchy-saturated tight sandstone with fabric heterogeneity

Jing Ba, Mengqiu Guo, Wenhao Xu, Fengyuan Sun, Lin Zhang, Wei Cheng

Petroleum Exploration Society of Australia (PESA)

..., the corresponding local fluid flow governing equation is derived. The equations of wave propagation are The Australasian Exploration Geoscience...

Abstract: Slant-Wave Stack, by Jon F. Claerbout, Philip S. Schultz, Raul Estevez; #90976 (1976).

Search and Discovery.com

Abstract: Seismic Imaging of Imbricate Structures in Mountainous Area: Case Studies; #90211 (2015)

Nanxun Dai, Oz Yilmaz, Weizhong Wang, and Jie Zhang

Search and Discovery.com

... and the substratum model is estimated by half-space velocity analysis. (4) The subsurface image is obtained by wave equation based prestack depth...