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The AAPG/Datapages Combined Publications Database

Showing 48 Results. Searched 189,922 documents.

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Understanding Field Performance of Hydraulically Fractured Wells: Comparison of Pressure Front Versus Tracer Front Propagation Using the Fast Marching Method (FMM) and Complex Analysis Method (CAM)

Kiran Nandlal, Chen Li, Ching-Hsien Liu, Venkata Bala Krishnateja Chavali, Michael J. King, Ruud Weijermars

Unconventional Resources Technology Conference (URTEC)

... “asymptotic pressure approximation” based on the diffusive time-of-flight (DTOF), which is calculated by solving the Eikonal equation using a front-tracking...

2020

Time-Lapse Seismic Monitoring of Individual Hydraulic Frac Stages Using a Downhole Distributed Acoustic Sensing Array

Gary Binder, Aleksei Titov, Diana Tamayo, James Simmons, Ali Tura, Grant Byerley, David Monk

Unconventional Resources Technology Conference (URTEC)

...el can be calculated using a P-wave eikonal equation solver for 2D transverse isotropic media described by Han et al., 2017. As shown in Fig. ...

2019

Traveltime Computations for Locating the Source of Micro Seismic Events and for Forming Gridded Traveltime Maps

John C. Bancroft

Search and Discovery.com

... solution to the eikonal equation. This method assumes plane waves and produces significant errors when the radius of curvature of the wavefront...

Unknown

Traveltime Computations for Locating the Source of Micro Seismic Events and for Forming Gridded Traveltime Maps

John C. Bancroft

Search and Discovery.com

... solution to the eikonal equation. This method assumes plane waves and produces significant errors when the radius of curvature of the wavefront...

Unknown

Abstract: Application of Acoustic Waveform Tomography to Marine Seismic Reflection Data Contaminated with Strong Guided Waves; #90187 (2014)

Rajesh Vayavur and Andrew. J. Calvert

Search and Discovery.com

... first arrival tomography code of Aldridge and Oldenburg (1993), which is based on a finite difference solution of the eikonal equation to derive...

2014

Abstract: Influence of Error in Estimating Anisotropic Parameters on VTI Depth Imaging; #90255 (2017)

S. Y. Moussavi Alashloo, D. P. Ghosh, W. Y. Wan Ismail

Search and Discovery.com

... such as sparse data acquisition, erroneous data with low signal to noise ratio, etc. In this study, a fast marching eikonal solver is employed...

2017

Reservoir and Fracture Flow Characterization Using a Novel ω(τ) Formulation

Xu Xue, Changdong Yang, Vishal Kumar Sharma, Akhil Datta-Gupta, Michael J. King

Unconventional Resources Technology Conference (URTEC)

... in unconventional reservoirs. The asymptotic analysis leads to the Eikonal equation that describes the evolution of the drainage volume accounting...

2016

Abstract: Regime Rays: Visualizing the Fermat/Snell Loci in Homogeneous Anisotropic Media; #90171 (2013)

William J. Vetter

Search and Discovery.com

... from overlooked extra prescribed directions/progression-speeds detail in sequenced moderelevant eikonal equations, relevant for FS-rays for given...

2013

Abstract: Tomography of a Velocity Modeland Location of Microseismic Events with P, Sv and Sh Waves; #90224 (2015)

Malgorzata Chmiel and Thomas Bardainne

Search and Discovery.com

... analytical and numerical modules (time 3 D - based on the 3D eikonal equation developed by Podvin and Lecomte (1991) and an anisotropic ray tracer...

2015

Sediment Accumulation Rates For the Mississippi Delta Region: a Time-interval Synthesis

Chris Jenkins

Journal of Sedimentary Research (SEPM)

.../Halflife [Accessed September 17, 2016]. Wikipedia contributors, 2016, Eikonal equation: Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki...

2018

Rapid Refracturing Candidate Selection in Shale Reservoirs Using Drainage Volume and Instantaneous Recovery Ratio

Changdong Yang, Xu Xue, Jixiang Huang, Akhil Datta-Gupta, Michael J. King

Unconventional Resources Technology Conference (URTEC)

... the asymptotic (high frequency) limit of the diffusivity equation for the impulse pressure solution and requires solution of the Eikonal equation...

2016

Simultaneous Joint Inversion of Seismic, Magnetotelluric and Gravity in a Sub-Volcanic Reservoir

Muhammad Irsyad Hibatullah, Maulana hutama Rahma Putra, Firman Syaifuddin Akbar, Dwa Desa Warnana, Fahrenzy Yona Aisha

Indonesian Petroleum Association

... on the Faust equation (1) (Faust, 1951) and Density parameters using the Gardner equation (2) (Gardner, Gardner and Gregory, 1974...

2019

Seismic Imaging of the Overturned Limb of a Footwall Syncline in the Alberta Foothills of the Canadian Rocky Mountains and Its Impact on Exploration; #30533 (2017)

Andrew C. Newson

Search and Discovery.com

... with a 7000 meter aperture. The travel times were obtained by solving the eikonal equation using finite differences. The geophysical modelling supports...

2017

Using Reflected Phases to Improve Depth Resolution of Microseismic Source Locations from Single-Well Observations

James Rutledge, Nobukazu Soma

Unconventional Resources Technology Conference (URTEC)

... TiCAL by ray-tracing through the 7-layer velocity model. The ray-tracing calculation was done by a 2nd-order solution of the eikonal equation based...

2013

Predicting Waterflood Behavior by Simulating Earth Models with No or Limited Dynamic Data: From Model Ranking to Simulating a Billion-Cell Model

Joseph Hovadik, David Larue

AAPG Special Volumes

... (1996). The method is used to solve the eikonal equation that describes the traveltime of a propagating front:where t(x, y, z) is the traveltime, and v...

2011

Monitoring Sea-floor Instability Caused by the Presence of Gas Hydrate Using Ocean Acoustical and Geophysical Techniques in the Northern Gulf of Mexico

Erika Geresi, Ross Chapman, Tom McGee, Bob Woolsey

AAPG Special Volumes

... field is handled theoretically. Typically, the traveltime is known analytically by solving the eikonal (ray) equation directly or by ray tracing...

2009

Reservoir Description by Interferometric Imaging of VSP Data in Transition Zones

Thomas Radford, Martin Karrenbach, Ferry Yustiana, Willi Brianno, Dhea Wachju

Indonesian Petroleum Association

... was applied to the VSP data (similar to He et al., 2007). , , , This equation describes the imaging operation M(p) in the frequency...

2013

Quantification of Connectivity in Images

Yaokun Wu, Siddharth Misra

Unconventional Resources Technology Conference (URTEC)

... to boundary value problems of the Eikonal equation given by (Sethian 1996): 𝐹(𝑥)|∇𝑇(𝑥)| = 1 URTeC 2937 6 where 𝐹 is the travel speed as a function...

2020

Simultaneous Inversion for Microseismic Event Location and Velocity Model in Vaca Muerta Formation

Zhishuai Zhang, Jing Du, Fuchun Gao

Unconventional Resources Technology Conference (URTEC)

... predicted using these predetermined velocity models. The forward modeling was conducted by solving the Eikonal equation for the first arrivals, which...

2017

PSDM Enhances Reef Interpretation in Jatiluhur Block, West Java

Jopie I. Adhidjaja, Andrew J. Davidoff, Ika Ratna Novianti

Indonesian Petroleum Association

.... It has been found to produce higher quality depth images than the conventional Eikonal algorithm. Options for ray tracing selection include maximum...

2002

Time-Lapse Imaging of a Hydraulic Stimulation Using 4-D Vertical Seismic Profiles and Fiber Optics in the Midland Basin

Robert Meek, Kevin Woller, Mark George, Robert Hull, Hector Bello, Jed Wagner

Unconventional Resources Technology Conference (URTEC)

... migration. The depth migration used an isotropic eikonal traveltime solution calculated from a single velocity function derived from the zero-offset direct...

2017

Two-dimensional seismic refraction tomography of a buried bedrock valley at Hallsands beach, Devon, United Kingdom

Eric B. Avalos, David H. Malone, Eric W. Peterson, William P. Anderson, and Roland W. Gehrels

Environmental Geosciences (DEG)

.... T., and A. Quintus-Bosz, 1993, Wavepath eikonal traveltime inversion: Theory: Geophysics, v. 58, p. 1314–1323, doi:10.1190/1.1443514. Tsai, C. C., R. D...

2016

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