Seismic Models and Interpretation of The Casper Arch Thrust: Application to Rocky Mountain Foreland Structure

Riley C. Skeen, R. Randy Ray

Rocky Mountain Association of Geologists

... foreland thrusts. The models aid in understanding the velocity and ray path effects that distort seismic reflection data and complicate its...

Revisiting the Brazilian Equatorial Margin with FWI and its impact on interpretation in an exploratory frontier

Diego Costa, Edmarley Ramos, Giuseppe Loconte, Filipe Rudrigues, Olivier Brachet

International Meeting for Applied Geoscience and Energy (IMAGE)

... seals. For example, we identified intra-reservoir “ghost channels” that are imprints of velocity contrasts from the real channels immediately above...

A New Analytical Model for Liquid Loading in Shale Gas Reservoirs

Juntai Shi, Xiangfang Li, Yunchao Pu, Wei Yu

Unconventional Resources Technology Conference (URTEC)

... loaded and produced from shale gas wells. Key coefficient of B in the new model of critical liquid loading flow velocity (vg = B(σ(ρl-ρg)/ρg2)0.25...

Improving reservoir imaging with FWI: A case study in the Columbus Basin, offshore Trinidad

Xiaolei Song, Simon Luo, Hu Jin, Imtiaz Ahmed, Akkel Paul, Nirala Boodoo, Ganyuan Xia, Sean Cardinez, Rodney Johnston

International Meeting for Applied Geoscience and Energy (IMAGE)

... full waveform inversion (FWI) to an offshore gas field in Trinidad with complex geology. We obtained a detailed velocity model up to 30 Hz using Ocean...

Processing the first full azimuth OBN survey in Australia: a step change in imaging quality

Unnikrishnan Chambath, Vincent Ganivet, Sergey Birdus, Joe Zhou, Alain Delorme, Leigh Scoby-Smith, Ivan Gregory, Matt Kovacevic, Tim Williams, Chris Walton

Petroleum Exploration Society of Australia (PESA)

... the fault shadow issue The root cause of the fault shadow is the strong velocity variation across the faults. It creates a weak illumination thus low signal...

Integrated Seismological-Geological-Engineered Steering Technology Applied to Horizontal Well Drilling: Practice and Application in Fuling Shale Gas Field, China

Peng Liao, Deming Xiong, Shugui Zha

Unconventional Resources Technology Conference (URTEC)

... steering model and comprehensive use of drilling and well logging, velocity field has been real-timely updated. Meanwhile, three methods of target depth...

The Properties of Bed Sediments in Pools and Riffles

Paul J. Hirsch , Athol D. Abrahams

Journal of Sedimentary Research (SEPM)

... are both coarser and better sorted than the pool sediments. These differences are explained in terms of reversal of the bottom velocity/shear stress...

Geophysical Observations on Sediments and Basement Structure Underlying Sable Island, Nova Scotia

J. Berger, J. E. Blanchard, M. J. Keen, R. E. McAllister, C. F. Tsong

AAPG Bulletin

... of the following layers: unconsolidated sediment, compressional velocity 5,900 ft./sec., thickness 3,250 ft.; semi-consolidated sediment, compressional...

Refraction Shooting with Expendable Sonobuoys: GEOLOGICAL NOTES

J. Ewing , R. Leyden , M. Ewing

AAPG Bulletin

..., 1968, Velocity of deep-sea sediments from sonobuoy data: Jour. Geophys. Research, v. 73, p. 2615-2641. Le Pichon, X., J. Ewing, and R. E Houtz...

ABSTRACT: Future of Microseismic Analysis: Integration of Monitoring and Reservoir Simulation; #90122 (2011)

Leo Eisner, Vladimir Grechka, and Sherilyn Williams-Stroud

Search and Discovery.com

... on improvements in multiple discipline areas, two of which are discussed in this study: better quantification of event locations along with the velocity model...

Seismic Modeling of Reservoir Heterogeneity Scales: An Application on Gas Hydrate Reservoirs

Search and Discovery.com

... of Toronto, Toronto, ON, Canada Summary Heterogeneous petrophysics reservoir models were constructed based on the P-wave and S-wave velocity logs showing...

Abstract: Full-Waveform Inversion of Field Data in the Foothills: Results and Challenges with Long-Offset Seismic; #90172 (2014)

Andrew J. Brenders, R. Gerhard Pratt, Sylvestre Charles

Search and Discovery.com

... for fullwaveform inversion, these data provide an excellent opportunity for demonstrating the efficacy of full-waveform inversion in building velocity models...

Abstract: Interferometric Approach to Complete Refraction Statics Solution; #90187 (2014)

Valentina Khatchatrian and Mike Galbraith

Search and Discovery.com

... and Mike Galbraith, WesternGeco, Calgary, Alberta, Canada Summary Variations in the thickness and low velocity in the weathered layer affect...

Abstract: Simplified Processing of Converted Wave Data; #90224 (2015)

John C. Bancroft and Thais Guirigay

Search and Discovery.com

... a prestack time migration. The velocity field of the subsurface is now defined with stacking or RMS type velocities. These velocities are much less sensitive...

Synthetic Seismograms for PS Seismic Data; #41793 (2016)

Satinder Chopra, Ritesh Kumar Sharma

Search and Discovery.com

... is dependent on the angle of incidence as well as the elastic parameters, which can all be derived from the P-velocity, S-velocity and density of the two media...

Seismic Anisotropy VTI Modeling and Mechanical Properties of Kerogen in Gas Shale, #42486 (2020).

Anggoro S. Dradjat, Agus Djamil, M. Firwan Aprizal

Search and Discovery.com

... modulus Young. Seismic amplitude response of layering shale can be quantified through physical process using seismic P and S wave velocity measurement...

Developments for Improving Efficiency of Oil-Water-Solids Separations

H. M. Chelton

Indonesian Petroleum Association

... the solids is normally introduced near the bottom and flows upward and out of the top. Solids whose terminal velocity downward is higher than the upward...

A Quantitative Study of the Seismic Time-Amplitude Reflection Characteristics in an Oil Field

Ng Tong San, Idrus Mohd Shuhud, Leong Lap Sau

Geological Society of Malaysia (GSM)

... and 3D seismic data set for interpretation. In this area, wireline logs indicate velocity to be a poor lithologic descriptor. The acoustic impedance...

A Reasonable View of the Seismic Anomaly

R. W. Dudley

Tulsa Geological Society

... on a seismic anomaly may not accurately reflect the merit of the structure because of the effect of a local vertical velocity gradient. To emphasize...

Exploring Geophysical Exploration

Carl H. Savit

Houston Geological Society Bulletin

... occasionally by others, and not at all by many. The first of these methods, the so-called acoustic velocity transform, is the next logical step after bright...

Seismic Foldout: Dynamic Matching FWI + EEI makes a difference to your interpretation

Bent Kjølhamar, Adriana Citlali Ramírez, Reidun Myklebust, TGS

GEO ExPro Magazine

... seismic database with new tools like DM FWI's detailed velocity volumes and better AVO screening tools like rEEI, as shown in this article and seismic...

Refraction tomography at the Nova Ni-Cu mine

Ian James, Graeme Hird, Andrew Fitzpatrick

Petroleum Exploration Society of Australia (PESA)

..., the refracted arrival is digitised and used to correct for nearsurface velocity variations. By performing a 3D inversion of these first arrivals, a high...

Extended full-waveform inversion to improve the subsalt imaging in GOM

Guojian Shan, Jingru Chen, Zhemin Tan, John Chen, Yue Wang, Xiaoting Lou, Jennifer Zhang, William Lester

International Meeting for Applied Geoscience and Energy (IMAGE)

... and amplitude discrepancy. Both synthetic and field data examples demonstrate that extended FWI enhance the velocity of complex overburden and improve...

Direct Hydrocarbon Indications Using Seismic Amplitude Variations with Offset

William J. Ostrander

AAPG Special Volumes

... substantially reduces P-wave seismic velocity (Vp). This is accompanied by a minor increase in the S-wave seismic velocity (Vs). Because Poisson's ratio...

Ekofisk: First of the Giant Oil Fields of Western Europe: REPLY

Owen D. Thomas , L. K. S. Popham

AAPG Bulletin

...), "The Ekofisk field was found by a well drilled on a velocity high, not a structural high. It turned out to be nearly an edge well over 400 ft (122 m) lower than...