Improvement of Seismic Tomographic Imaging by Downward Continuation and Modified SIRT

Teuku A. Sanny, D. Santoso, D. Dahrin, Fatkhan, Alfian B.

Indonesian Petroleum Association

... 411 419 There were some problems with seismic tomographic reconstruction when the Low Velocity Layer (LVL) exists at the top of the investigation...

Abstract: Full Waveform Inversion with Phase Encoded Deconvolution Imaging Condition; #90224 (2015)

Wenyong Pan, Kris Innanen, and Gary Margrave

Search and Discovery.com

... frequency band used is [0Hz, 5Hz] and the frequency band increases by 5Hz for every 10 iterations. Figure 1: (a) True velocity model; (b) Initial...

Eikonal equation-based adjoint-state characteristic reflection traveltime tomography: Method and application in real dataset

Jianming Zhang, Liangguo Dong, Jianhua Wang, Yilin Wang, Chao Huang

International Meeting for Applied Geoscience and Energy (IMAGE)

... to reconstruct the subsurface velocity model. This method automatically extracts the characteristic reflection traveltimes in pre-stack seismic data by combining...

Combined Geophysical Methods for Investigating the Border Area of the Kamsko-Kinel Depression

Yu. A. Byakov, S. A. Shikhov

Petroleum Geology: A Digest of Russian Literature

... of the Lower Carboniferous by the seismic reflection method: Geologiya Nefti i Gaza, no. 2. 2. Byakov, Yu. A., 1962, Investigation of the effective velocity...

Development of offshore microtremor array exploration

Yoshikazu Matsubara, Mikihiro Imai, Akeshi Hiraide

International Meeting for Applied Geoscience and Energy (IMAGE)

.... Comparison of each Vs profile at the site where array measurements and PS velocity logging were performed were very consistent. Exploration using this method...

Combining high resolution modelling and one-way wave field extrapolation migration to image beneath a complex overburden: A case study from Porcupine Basin, Ireland

Partha Pratim Mandal, Weidi Koh, Julien Bluteau, David Laws, Jennifer Greenhalgh

Petroleum Exploration Society of Australia (PESA)

... acceptance for structural imaging and tomographic velocity analysis in geologically complex depositional environments (Gray et al., 2006...

A Simple Guide to Depth Conversion: Part II

Ashley Francis

GEO ExPro Magazine

... models work well. It depends on whether lateral velocity variations are present and represented by horizons that can be picked on seismic. 2. QC input...

The Balance between Geophysics and Geology in Seismic Interpretation, by Alistair R. Brown, #40615 (2010).

Search and Discovery.com

Seismic Interpretation of the Casper Arch Thrust, Tepee Flats Field, Wyoming

R. Randy Ray, Charles R. Berg

Rocky Mountain Association of Geologists

... of the high velocity overthrust Precambrian granite as a result of velocity pull-up effect. Skeen and Ray (1983) interpreted the crest of the Tepee Flats...

Quantitative Self-Verification, a Breakthrough in Ultrasonic Metering Technology

Gregor J. Brown, Ross Johnston

Australian Petroleum Production & Exploration Association (APPEA) Journal

... applications intervals between calibration of up to 5 years are allowed, but faults and adverse process conditions can still lead to measurement errors...

Meramec Velocity Systematics

Jing Fu, Carl Sondergeld, Chandra Rai

Unconventional Resources Technology Conference (URTEC)

... reservoirs, the Greenberg-Castagna shear-wave velocity prediction method does not yield accurate shear wave velocities, with observed mean errors varying...

Abstract: Comparative Study on 2D Microseismic Source Location with Synthetic Seismograms Recorded by Borehole- and Surfacereceiver Arrays; #90224 (2015)

Anton Biryukov, Simon G.E. Harvey, and Giovanni Grasselli

Search and Discovery.com

... locations were used, and the RTM was done with velocity errors of 5% and 10% (Figure 6). It is notable that for velocity models with overestimated velocity...

Enhancing Subsurface Imaging and Reservoir Characterization in the Marcellus Through Advanced Reprocessing of Wide Azimuth 3-D Seismic

Search and Discovery.com

Shallow Velocity Model Building Considerations for Prestack Depth Migration in Unconventionals

Mike Perz, Josef Heim, Candace Bruins

Unconventional Resources Technology Conference (URTEC)

...Shallow Velocity Model Building Considerations for Prestack Depth Migration in Unconventionals Mike Perz, Josef Heim, Candace Bruins URTeC: 399...

High-Resolution Anisotropic Earth Model Building on Conventional Seismic Data Using Full-Waveform Inversion: an Offshore Australia Case Study

Bee Jik Lim, Denes Vigh, Stephen Alwon, Saeeda Hydal, Martin Bayly, Chris Manuel, Dimitri Chagalov, Gary Hampson, Dimitri Bevc

Indonesian Petroleum Association

... and introducing +/-10% velocity errors in a 2km square checkerboard fashion (Figure 4b). The forward modeling geometry mimicked the real acquisition...

Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

.../depth ratio. Conventional velocity analysis uses hyperbolic approximation for the reflection traveltimes: t( x) 2 T02  x 2 VRMS (1) Here T0...

Long-Offset Approximations to NMO Function for a Layered Subsurface

E. Blias

Search and Discovery.com

.../depth ratio. Conventional velocity analysis uses hyperbolic approximation for the reflection traveltimes: t( x) 2 T02  x 2 VRMS (1) Here T0...

Shape Entropy and Settling Velocity of Natural Grains

J.P. Le Roux

Journal of Sedimentary Research (SEPM)

...Shape Entropy and Settling Velocity of Natural Grains J.P. Le Roux 2002 363 366 Vol. 72 (2002) No. 3. (May) The shape of sedimentary particles has...

Abstract: Workflows for Sweet Spots Identification in Shale Plays Using Seismic Inversion and Well Logs; #90187 (2014)

Yexin Liu

Search and Discovery.com

... anisotropic inversion to simultaneously estimate the anisotropic epsilon, delta and gamma ( in addition to compressional velocity (Vp), shear velocity...

Induced seismicity in Howard County V: Technical and regulatory challenges for induced seismicity and deep disposal of fluids

Alan R. Huffman, Tony Lupo, Rachel Storniolo, Andrew Keene, Jeff Zawila, Erik Hiemstra, Tianrun Chen, Elizabeth Marlow, Xinding Fang, Nick Brooks, Sheri Bowman, Nick Fleegal, Alan Ramsay

International Meeting for Applied Geoscience and Energy (IMAGE)

... basin velocity model, has introduced significant errors into epicentral locations and hypocentral depths, leading to errors in estimated magnitudes...

Nonparametric Bayesian approach for robust depth uncertainty estimation from seismic velocity and anisotropy tradeoffs

Jinsong Chen, Sizhuang Deng, Min Yang, Andrey Shabelansky, Cory Hoelting, Huafeng Liu, Maisha Amaru

International Meeting for Applied Geoscience and Energy (IMAGE)

...Nonparametric Bayesian approach for robust depth uncertainty estimation from seismic velocity and anisotropy tradeoffs Jinsong Chen, Sizhuang Deng...

3D Seismic Proves its Value in Bakken Geosteering

Angie Southcott, Harold Harper

Unconventional Resources Technology Conference (URTEC)

... hailed publicly by WPX Energy management as a key driver in achieving lower well costs in the Williston Basin. Geosteering errors in the basin were reduced...

Joint 4D full-waveform inversion using enhanced template-matching objective function

Gaurav Dutta, Emmanuel Saragoussi, Xin Cheng, Markos Sourial, Yongbo Zhai, Chirag Parekh, Denes Vigh

International Meeting for Applied Geoscience and Energy (IMAGE)

... for velocity model building in different regions of the world. In recent years, there has been considerable interest in using high-frequency velocity...

Influence of node position uncertainty on FWI and Mirror-RTM

Felipe Capuzzo, Marco Cetale, Sergio Luiz da Silva, Roger Moreira, Felipe T. Costa, Ammir A. Karsou, Jorge Lopez

International Meeting for Applied Geoscience and Energy (IMAGE)

... their influence on imaging. Our results show that uncertainties in OBN positioning can lead to errors in the recovered velocity models obtained from FWI, which...

Pushing the boundary of WAZ streamer data for subsalt imaging: A case study in deepwater Mexico Campeche

Yi Chen, Kendra Pyke, Juan Wang, Jasmeen Moubarak, Earl Manning, Jessica Kopp, Rongzhang Chen, Chang Chen, Ravi Kumar, Minshen Wang, Sabaresan Mothi

International Meeting for Applied Geoscience and Energy (IMAGE)

... al., 2020). Therefore, we take advantage of the benefits from FWI Images to provide insights into velocity errors that conventional RTM images may...