An efficient L-BFGS-based approach to estimate the uncertainty of full-waveform inversions

Yongbo Zhai, Xin Cheng, Robert Bloor, Denes Vigh, Zhen Xu

International Meeting for Applied Geoscience and Energy (IMAGE)

..., and James Xu, Schlumberger Summary Full Waveform Inversion (FWI) has played a critical role in estimating the subsurface velocity models during the past...

Modern Technology Reveals New Opportunities in the North Sea

Cyrille Reiser, Euan Anderson, Frances Matthew

GEO ExPro Magazine

... have been introduced aiming to provide a broader seismic bandwidth, including variable inline streamer tow depth, acquisition with some streamers...

Santos, Farm-In Opportunity for 2001, Presented at SEAPEX 2001

Santos Ltd Exploration Staff

Southeast Asia Petroleum Exploration Society (SEAPEX)

... is sourced from the pre Middle Jurassic and gains access to the Brewster sands via faulting of the Late Jurassic section. The gas fields have variable...

Reply (To Comment on Article by R. S. Yeats on Low-Shake Faults of the Ventura Basin, CaliforniaŽ)

Robert S. Yeats

Pacific Section SEPM

... fault trace. In their view, a low-angle thrust should have a trace of more variable trend. However, as illustrated diagrammatically in Fig. 2...

Integrating Seismic Imaging and Inversion

Francisco Bolivar, Richard Cooper, Lucy MacGregor, Jacqueline O’Connor, Jeff Codd, David Kessler

GEO ExPro Magazine

.... Amplitude is preserved in areas of uniform illumination and the industry is working to produce amplitude-balanced PSDM even in areas of variable illumination...

Analysis of Water-Level Rise Effects on Littoral Transport

C. R. Berquist , W. F Tanner

GCAGS Transactions

... as a ratio of littoral power values. The most important independent variable entering into this ratio is the change in water level. An increase...

Study of the Structure of the Western Border of the Caspian Depression by the Seismic Method

B. N. Lutsenko

Petroleum Geology: A Digest of Russian Literature

... drilling to the top of the Kungur salt. The dips of the flanks of the Kungur are strongly variable, reaching 35-50° on the peripheral parts of the fold...

Seismic Foldout: The Danish Energy Island

Martin Bak Hansen, Louise Sandberg Sørensen, Jens Colberg-Larsen, Ana Maia, Henrique Duarte, GEOSURVEYS, Bruno Stuyts, Esben Dalgaard, SOLIDGROUND

GEO ExPro Magazine

... landforms and deposits of Quaternary age reveal several buried tunnel valleys exhibiting distinct stages of valley infill and variable sediment...

Abstract: Fullbore Formation Micro Imager Logs for Evaluating Stratigraphic Features and Key Surfaces in Thin-bedded Turbidite Successions

Robert J. Spang , Roger M. Slatt , Greg H. Browne , Neil F. Hurley , Eugene T. Williams , Robert J. Davis , George R. Kear , Laura S. Foulk

GCAGS Transactions

.... Mineral composition, permeability, acoustic velocity, and density were determined for selected samples of the core to determine effects on the logs...

Assessing Wave Energy Resources: An Overview of New Zealand

David Johnson

Petroleum Exploration Society of Australia (PESA)

... including mean and peak period (a function of wave length), and mean and extreme significant wave height, and surface and near bed orbital velocity...

Australian Opportunities „ 2016 Offshore Petroleum Exploration Acreage Release

Jennifer Greenhalgh

Petroleum Exploration Society of Australia (PESA)

... and seismic inversion) to achieve the goal of providing a new regionally consistent framework across the variable velocity regime of the North West Shelf...

Abstract: Sepat Barat Deep-2: The Deepest and Hottest HPHT Well in North Malay Basin (Paper B5)

S. Osman, M. F. Nianamuthu, F. A. Ismail, J. J. M. Idris, J. Ping

Geological Society of Malaysia (GSM)

... characterized by having variable CO2 concentrations. Given the pressure range at the groups F, H, I and J depths as well as temperature gradient...

Oil-Gas Prospects of Intermediate Complex of Rocks of North Turkmenistan

V. A. Spikin

Petroleum Geology: A Digest of Russian Literature

... molasse is variable areally and along the section. It is subdivided into two members, a lower conglomeratic and an upper shaly. Pyroclastics are present...

Session 3. Lobate (Deltaic) Shoreline Facies

Richard C. Selley

AAPG Special Volumes

... Consider a sediment-laden jet of water entering a standing body of water. Current velocity decreases radially from the jet nozzle. Therefore...

III. Processing For Preservation of Seismic Amplitudes

Norman S. Neidell

AAPG Special Volumes

... are, of course, a natural consequence of spreading wavefronts and would occur whether or not reflecting interfaces or velocity gradients were present...

An Experimental Study of the Influence of Subaqueous Shelf Angles on Coastal Plain and Shelf Deposits: Chapter 15: Recent Developments in Siliciclastic Sequence Stratigraphy

L. J. Wood, F. G. Ethridge, S. A. Schumm

AAPG Special Volumes

... fluvial channel slope, which partially controls the erosive and transportive capacity of the channel by influencing stream power, flow velocity...

Abstract: Calibration – The Basis for Successful Modeling, by J. L. Gevirtz and K. E. Williams; #90091 (2009)

Search and Discovery.com

AAPG Latin America & Caribbean Region, Optimizing Exploration and Development in Thrust Belts and Foreland Basins.

Search and Discovery.com

Abstract: Lithofacies Prediction from Seismic, One Step at a Time: An Example from the McMurray Formation Bitumen Reservoir at Surmont; #90171 (2013)

Matt Hall

Search and Discovery.com

... intervals tend to show small but consistent density contrasts, but inconsistent velocity contrasts. As a result, impedance and reflectivity may...

Abstract: A Seismic Workstation Solution to Bakken AVO; #90174 (2014)

D. Meisinger and N. H. Kalmanovitch

Search and Discovery.com

... with an interval velocity of 4800m/s has a ¼λ resonance corresponding to 100 Hz.) For the most part this 100 Hz is resident within the seismic data...

Abstract: Overpressure Conditions and Reservoir Compartmentalization on the Scotian Margin; #90187 (2014)

Carla Dickson and Grant Wach

Search and Discovery.com

... margin was variable and not readily predictable. Negative aspects and unknowns of overpressure are it can occur with similar magnitude at varying...

Abstracts: Workflows for Integrated Seismic Interpretation of Rock Properties and Geomechanical Data: Part 1 … Principles and Theory; #90173 (2015)

M. A. Perez, D. I. Close, B. Goodway, and D. Monk

Search and Discovery.com

... “homogeneous” media suggests variable SRV and has directed geophysics to mapping “sweet spots” or areas of larger potential SRV and thus increased productivity...

Abstract: Resolving The Discrepancies Between Vertical Seismic Profiles And Petrophysical Logs, At Least A Few Of Them; #90213 (2015)

John D. Logel and Rick Kuzmiski

Search and Discovery.com

... using a constant high Q (non-attenuative) and a variable Q, on the amplitude and more importantly the phase of the data. There is little effect...

Potential Tight Gas Resources in a Frontier Province -- Jurassic through Tertiary Strata beneath the Brooks Range Foothills, Arctic Alaska, by Philip H. Nelson, Kenneth J. Bird, and David W. Houseknecht

Search and Discovery.com

Evaluation of the Multiple Origins of Thin-Bedded Deep-Water Slope Sandstones: El Rosario Formation (Upper Cretaceous - Paleocene) Baja California, Mexico; #50211 (2009)

Jesus Ochoa and Michael Gardner

Search and Discovery.com

...), flow evolution (velocity, run-out length), preservation (bypass, erosion), and reworking (biological, physical). Cretaceous and Tertiary outcrops...