Abstract: Time-Lapse FullWaveform Inversion Application To Seismic Monitoring Of CO2 Sequestration; #90224 (2015)

Wubshet Alemie

Search and Discovery.com

... the 2D velocity model for a constant density acoustic wave equation modelling presented in Equation 1 to mimic the time lapse change. This model has...

The response of turbidite slope channels to growth-induced seabed topography

Mike Mayall, Lidia Lonergan, Andrew Bowman, Stephen James, Keith Mills, Tim Primmer, Dave Pope, Louise Rogers, Roxanne Skeene

AAPG Bulletin

...-topography interaction has a strong but commonly subtle effect on the geometry, internal stratigraphic architecture, and nature and distribution...

Nonlinear time difference detection of seismic image based on image registration

Rongwei Xu, Huazhong Wang, Bo Feng, Chengliang Wu

International Meeting for Applied Geoscience and Energy (IMAGE)

.... In scenarios involving complex data and media, where the initial velocity model is inaccurate, gradientguided, classic FWI often struggles to converge...

Concentration-Dependent Flow Stratification In Experimental High-Density Turbidity Currents and Their Relevance To Turbidite Facies Models

Matthieu J.B. Cartigny,, Joris T. Eggenhuisen, Ernst W.M. Hansen, George Postma

Journal of Sedimentary Research (SEPM)

... over the 5 seconds displayed in Figure 7. Additional velocity profiles 0.5 s-time-average profiles are shown as overlay to illustrate the effect...

Turbulence Effects on the Settling of Suspended Particles

Peter Nielsen

Journal of Sedimentary Research (SEPM)

... fast tracks along the vortex boundaries, and this results in an increase of the average settling velocity. The same effect was also found by Maxey...

Modeling Sonic Velocity in Carbonates Using Thin Sections, by Gregor Baechle, Arnout Colpaert, Gregor P. Eberli, and Ralf J. Weger, #40313 (2008)

Search and Discovery.com

Abstracts: True-Amplitude PS Prestack Time Migration via 5D Interpolation; #90173 (2015)

Peter W. Cary, Albert Zhang

Search and Discovery.com

.... The effect of velocity ratio error on the move-out is much less than the effect of vc error. In PS-converted wave data processing the values...

The Wave Equation Applied to Migration

D. Loewenthal, L. Lu, R. Roberson, J. Sherwood

Southeast Asia Petroleum Exploration Society (SEAPEX)

... alternative migration techniques. Particular advantages are 1) the possibility of using a detailed velocity model for the migration and 2) the preservation...

4-D Seismic: A Powerful New Technology for Monitoring Steam Movements in Duri Field-Central Sumatra

S. D. Jenkins, M. F. Bee, J. H. Lyle, E. Murhantoro

Indonesian Petroleum Association

... accumulation on the hydrophone case could alter the sensitivity and change the pressure response. This effect could compromise the repeatability...

Abstract: An Analysis of the Benefits of 3D Pre-Stack Time Migration (Paper 11)

Peter Whiting

Geological Society of Malaysia (GSM)

... of a vertically varying velocity. The net effect of this is that out of plane primaries will tend to have a slower velocity than inplane primaries, even...

Abstract: The Effects of Fluid Viscosity on Seismic Response: A Model Study; #90171 (2013)

Fereidoon Vasheghani, Larry Lines, and Joan Embleton

Search and Discovery.com

... almost one order of magnitude change in quality factor. Forward Modeling To show the effect of viscosity on seismic response we use a simple...

Reducing Reservoir Characterization Uncertainties and Improving Field Recovery through Four-Dimensional Seismic Technology: An Integrated Four-Dimensional Seismic Interpretation Workflow

Jie Zhang, Dez Chu, Ganglin Chen, Kelly Wrobel, William L. Soroka

AAPG Special Volumes

... reservoir confining pressure conditions (30004000 psi [2128 MPa]), a pressure change of 500 psi (3 MPa) changes the P-wave velocity by about 2%. In contrast...

The Effects of Grain-Density Variation on Turbidity Currents and Some Implications for the Deposition of Carbonate Turbidites

James M. Hodson, Jan Alexander

Journal of Sedimentary Research (SEPM)

... and Church (2004) are shown in Figure 10. This illustrates that although grain size has a bigger influence on settling velocity, the effect of grain...

Correlation of seismic velocity and density of metasandstone from Kati Formation, Seri Iskandar, Perak, Malaysia

Norsyafiqah Salimun, Abdul Ghani Rafek, Khairul Arifin Mohd. Noh

Geological Society of Malaysia (GSM)

... the depth effect on seismic velocity. Through hundreds of sample testing, Gardner et al. (1974) proposed velocity (Vp) and density (p) relationship...

Azimuthal Anisotropy „ A New Interactive Approach Leads to More Accurate Imaging

Graeme Eastwood

Petroleum Exploration Society of Australia (PESA)

... of the ellipse describing applying a fully anisotropic NMO correction is accounted for in processing, either before or the change in velocity with azimuth...

CSPG/CSEG/CWLS GeoConvention 2013, May 6-12, 2013 Calgary TELUS Convention Centre & ERCB Core Research Centre, Calgary, Alberta, Canada; - Abstracts, #90187 (2014).

Search and Discovery.com

Guizhou modern karsts as analogues for paleokarst reservoirs in the Shunbei oil field, Tarim Basin, China

Jingbin Wang, Dongya Zhu, Zhiliang He, Haiming Song, Quanyou Liu, Cheng Zeng, Tianbo Yang, and Qian Ding

AAPG Bulletin

... systems (red lines) and the location of drilling wells in the Yuejin-Shunbei area. (D) Two-way traveltime (ms) map on the stratigraphic boundary between...

Abstract: Assessing the Need for Repeatability in Acquisition of Time-lapse Data; #90187 (2014)

Felix Oghenekohwo and Felix Herrmann

Search and Discovery.com

... will affect signals in 4D and we assess the effect of repeatability of the acquisition geometries. We will compare results with regular or periodic...

The Hydraulic Shape of Sand Particles

Louis I. Briggs, David S. Mcculloch, Frank Moser

Journal of Sedimentary Research (SEPM)

... be accurately measured, and the effect of shape on the mineral distribution evaluated. ALBERTSON, M. L., 1953, Effect of shape on the fall velocity of gravel...

Optimised 3D Land Geophysical Survey Design - A Case Study

P. van Baaren

Papua New Guinea (PNG) Petroleum Convention Proceedings

... of 3200m was determined. In Figure 4 the effect of different stretch mutes is shown for a given velocity function. Near offset data are least distorted...

Abstract: Separation of Seismic Diffractions and Specular Reflections: A Tool for Improved Processing, Imaging and Interpretation (Geophysics Poster 21)

Riaz Alai, M Hafizal Mad Zahir, Amar Ghaziah, Eric Verschuur

Geological Society of Malaysia (GSM)

... are generated as if a pseudo secondary point source is buried in the subsurface and is emitting diffracted energy. On the other hand, when there is a change...

South Timbalier 315 #1

Brian Rader

Houston Geological Society

... Factors/Map Reliability Change of Structural, Stratigraphic Interpretation Time/depth variance - lateral velocity change due to thinning on structure...

High-frequency FWI on Clair OBN dataset Challenges and successes

Matvey Romanenko, Lee Saxton, Dan Davies, James Sheng, Faqi Liu, Jan Gromotka, Yang He

International Meeting for Applied Geoscience and Energy (IMAGE)

... if they can provide insight. The expected change in velocity is around 2%, which is larger than the expected acoustic impedance change and thus 4D FWI...

High-resolution seismic detection of shallow natural gas beneath Hutchinson, Kansas

Susan E. Nissen, W. Lynn Watney, Jianghai Xia

Environmental Geosciences (DEG)

... this effect of a large change in velocity accompanied by a small change in density when the volume percentage of gas is low (approximately 10% or less...

Geophysics Is Here to Stay: REPLY TO N. C. STEENLAND

W. P. Jenny

AAPG Bulletin

... and experience. He knows that in a virgin area local and regional velocity variations and other considerations may change materially the configuration...