Spectral Decompostion for a More Accurate Image; #41807 (2016)

Rongfeng Zhang

Search and Discovery.com

... of subsurface events, which include reflections, diffractions and refractions, as well as noise and other factors unrelated to subsurface geology...

Discussion of Geochemical Exploration (Soil Analysis)

E. E. Rosaire, Eugene McDermott, R. H. Fash

AAPG Bulletin

... overnight, the refraction seismograph was metamorphosed (from a technique which had displayed only indifferent success for more than 2 years when tried...

Early Mesozoic Basin Structure and Tectonics of the Southeastern United States as Revealed from Cocorp Reflection Data and the Relation to Atlantic Rifting

J. H. Mcbride, K. D. Nelson, L. D. Brown

CSPG Special Publications

... distinguishes it from the underlying pre-Mesozoic basement or buried South Georgia Basin sediments. Laboratory and seismic refraction velocity studies...

Seismic expressions of a Miocene prograding carbonate margin, Mut Basin, Turkey

Xavier Janson, Gregor P. Eberli, Florence Bonnaffe, Fabrice Gaumet, Vincent De Casanove

AAPG Bulletin

... refractions, which overwhelm the signal in normal ray-modeling applications and disturb the image of the clinoforms. This method produces a very simplified...

Permian Basin of the United States: Chapter 16: PART I. WEST TEXAS AND SOUTHEAST NEW MEXICO

Edgar Wesley Owen

AAPG Special Volumes

... to be one of the richest tracts in the field. Amerada contoured the structure roughly from seismic refraction records in April 1929 (Innes, 1953), after...

The Thousand Dollar Prospect, Rich County, Utah, A Case History

Valen D. Ott, Kenneth R. Kreckel

Rocky Mountain Association of Geologists

... prospect area is named. During shooting it became apparent that a major field problem was multiple high velocity refractions contaminating the first two...

Fault Shadow Correction Methodology

P. Julien, J. L. Broyer, O. Bernet-Rollande

Indonesian Petroleum Association

... the fault plane. The reality of wave propagation around a fault plane is probably very complex (diffractions at the edges of reflectors, refractions along...

Uncertainty analysis of full-waveform velocity inversion

Kai Yao, Han Yin, Lian Duan, Yu Zhang, Feng Chen, Huili He, Mourad Khdhaouria, Lamia Rouis

International Meeting for Applied Geoscience and Energy (IMAGE)

... through that location. If a point lies along the propagation path of recorded refractions or reflections, it implies that velocity information relevant...

Modelling complex near-surface features to improve shallow seismic exploration.

Shaun Strong

Petroleum Exploration Society of Australia (PESA)

... thicknesses and includes a fault of likely size. The seismic record shows refractions, reflections (below .1s), ground roll and noise. The ground roll...

Abstract: Noise and its Effect on Microseismic Event Locations; #90174 (2014)

Neda Boroumand and Henry Bland

Search and Discovery.com

... repeated on several traces of a seismogram and can be caused by multiple reflectors or refractions, processes induced through the electronics, and often...

Tertiary Province of United States Gulf Coast, After 1920: Chapter 14

Edgar Wesley Owen

AAPG Special Volumes

... Coast prior to 1929 used the refraction method. The initial work by the Germans consisted entirely of line surveys. This procedure was unsuccessful...

Analysis of the impact of demigration on traveltime-based reflection full-waveform inversion

Hong Liang, Houzhu (James) Zhang, Hongwei Liu

International Meeting for Applied Geoscience and Energy (IMAGE)

... update for deeper target compared to conventional FWI using refractions and diving waves. For reflection FWI (RFWI), demigration is a key step...

Know Before You Go!

Lars Zühlsdorff, Trond Haugland

GEO ExPro Magazine

... to generate a shadow zone close to its base. Ray path analysis reveals that the shadow zone is caused by refractions in the overburden, which deflect...

Seismic Foldout: Accurate Reservoir Attributes Delivered with GeoStreamer X in the South Viking Graben, Norway

Cyrille Reiser, Roberto Ruiz, Eric Mueller, Julien Oukili, PGS

GEO ExPro Magazine

... using both refractions and reflections for FWI in a MAZ setting. This was key for resolving both shallow and deep velocity anomalies such as channels...

Memorial: Walter Jabez Osterhoudt (1906-1994)

Sherman A. Wengerd

AAPG Non-Technical and Memorials

... clamp seals, and techniques of low-yield dynamite triggering in very shallow casing to get both reflections and refractions beneath swamps...

Robust phase-driven time warping FWI for salt reconstruction

Guanghui Huang, Alejandro Alcudia-León, Jaime Ramos-Martínez, Nizar Chemingu

International Meeting for Applied Geoscience and Energy (IMAGE)

... reshaping of the salt geometry driven entirely by TWE-FWI utilizing refractions and reflections. Figures 2c and 2d show an example of the initial velocity...

Enhancing Spectral Decomposition to Delineates Subtle Channels … A Case Study from Offshore Nile Delta; #42180 (2018)

Islam A. Mohamed, Ahmed S. Abdel-Rahman, Amr E. Khalafalah, Abdul-Rahman Ali Mohamed

Search and Discovery.com

.... There are diffractions, refractions, and noise, but these are minor considerations when used for oil and gas exploration and reservoir...

Seismic Exploration in Railroad Valley, Nevada

John H. Vreeland, Bert H. Berrong

Rocky Mountain Association of Geologists

... in the composition of the alluvial fans which coalesced to form the bajada. These variations can cause refractions and noise on seismic records. Near-surface...

Active Source Sparse Imaging Using Permanent SADAR Arrays

Derek Quigley, Paul A. Nyffenegger, Kevin D. Hutchenson, Jonathan Yelton

Carbon Capture, Utilization and Storage (CCUS)

... roll arriving after initial reflections and refractions creates a noise cone that leaves an optimum offset window of clean data outside the cone...

Structure of Sedimentary Basins in Eastern Asia

J. Letouzey, Carla Muller, L. Sage

Southeast Asia Petroleum Exploration Society (SEAPEX)

... intrusions. Refractions and reflection seismic data suggest that most of the Southern Okinawa Trough is a subsiding Pleistoncene continental basin...

A Breakthrough in the Seismic Exploration Result on Small Oil Fields

G. Valeev, R. Enikeyev, T. Shestoukh

Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)

... converted refractions are traced. On the whole, with additional noise of P-wave arrivals the X-seismograms are characterized by a low signal – noise...

Theses: 1982 - 1985

Oklahoma City Geological Society

...) A synergetic study of seismic reflections and critical refractions in the Great Salt Lake Desert, Utah. 1984. Nelson, Michael (M.S. 1983) Areal geology...

Reservoir properties estimation using MAZ towed multisensor streamer seismic: A Norwegian case study

Cyrille Reiser, Roberto Ruiz

International Meeting for Applied Geoscience and Energy (IMAGE)

... through a comprehensive Velocity Model Building (VMB) flow where Full Waveform Inversion (FWI) using refractions and reflections in a MAZ setting...

High Fidelity Microseismic Data Acquisition in the Midland Basin Wolfcamp Shale Play West Texas, USA

Robert A. Hull, Robert Meek, Brian Wright, Hallie Meighan, Austin Von der Hoya, Jake Lempges

Unconventional Resources Technology Conference (URTEC)

... calibrated with T0, and placing phones trying to avoid inter-bed refractions we can at least assess key aspects of our stimulations. Lastly, by combining...

Mitigating the effects of guided waves in OBN data for acoustic FWI using data reconstruction: A data example from the Yggdrasil area

M. A. H. Zuberi, E. Cho, T. Seher, R. Myklebust

International Meeting for Applied Geoscience and Energy (IMAGE)

... full waveform inversion (FWI) because modelling these guided waves accurately can be expensive and attempts to remove them can harm refractions. We...