The Optimum Use of Gravity in Exploration

Frederick E. Romberg

GCAGS Transactions

.... The narrow anomalies are usually removed by averaging or smoothing, leaving only the target anomalies. The principle of the identifying process is easy...

RNN-based seismic velocity model building: Improving generalization using hybrid training data

Hani Alzahrani, Jeffrey Shragge

International Meeting for Applied Geoscience and Energy (IMAGE)

... the topology of any geological structure. We then apply 1-D Gaussian smoothing to the resulting interpolated interface. The next interface is similarly...

Premigration attenuation analysis and mapping to image domain by weighted migrations

Yonghe Sun, Chunling Wu, Mark Fan, Zhemin Tan

International Meeting for Applied Geoscience and Energy (IMAGE)

.../𝑄 (𝜃, 𝑧)/𝐼1 (𝜃, 𝑧). = (17) Numerically, however, the denominator 𝐼1 (𝜃, 𝑧) contains values with a mean of zero. A least-squares division and smoothing...

Research on first break picking based on deep learning for DAS-VSP data

Naijian Wang, Yinpo Xu, Yuxin Hou, Yingjie Pan, Mingxing Wang, Chun Zhang, Tianfu Yang

International Meeting for Applied Geoscience and Energy (IMAGE)

...two directions. Where in, is the start point of smoothing time window, ℎ is smoothing coefficient with a value of 1, and x is the first break time of th...

Induced polarization chargeability calibration standards

John E. E. Kingman, Terry J. Ritchie, Peter Rowston*

Petroleum Exploration Society of Australia (PESA)

... of the off time, depending on the width of any imposed smoothing or low-pass filtering. This allows considerably more robust filtering or random and periodic...

Practical Application of Adaptive Least-Squares Reverse Time Migration (LSRTM) to Advance Field Development and Uncover New Reserves in the Subsalt Provinces

Chong Zeng, Shuqian Dong, Zhaohong Wu, Jean Ji, Darrell Armentrout, Bin Wang

GCAGS Transactions

... by the two-way migration operator were suppressed via a structure-oriented smoothing process. We demonstrate here the effectiveness of the proposed adaptive...

Integration of XRF and Shades of Grey Profiles for In-Depth Characterization of Shale Properties; #42507 (2020)

Amjed Cheema, Jean-Yves Chatellier, Jamil Afzal

Search and Discovery.com

.... The representativity can be further reduced by processing the data as done by Lab 4 Processed XRF data using a smoothing function; this brings additional...

CHARACTERISTICS OF DELTAIC DEPOSITS IN THE CRETACEOUS PIERRE SHALE, TRINIDAD SANDSTONE, AND VERMEJO FORMATION, RATON BASIN, COLORADO

Romeo M. Flores, Stephen M. Tur

Rocky Mountain Association of Geologists

... surfaces. In a few localities where the sandstone bodies are stacked, the uppermost sandstone exhibits lowangle (8O to 114 epsilon crossbeds (Allen...

A Diagnostic-Based Methodology to Analyze Multiphase Well Performance and Forecast Gas-Oil Ratio (GOR) or Condensate-Gas Ratio (CGR)

Alexsandra Martinez, Eric Bryan, Alvaro Betancourt, Dave Symmons, Dilhan Ilk, Thomas Blasingame

Unconventional Resources Technology Conference (URTEC)

...) and/or a smoothing algorithm to prepare the data prior to the derivative calculation. There are also statistically-driven derivative approaches...

Practical and efficient three-dimensional structural restoration using an adaptation of the GeoChron model

Peter J. Lovely, Stanislas N. Jayr, and Donald A. Medwedeff

AAPG Bulletin

... surfaces using multiple unfolding mechanisms: AAPG Bulletin, v. 84, no. 6, p. 805–829. Sclater, J. G., and P. A. F. Christie, 1980, Continental...

GEO 2012 The 10th Middle East Geosciences Conference and Exhibition, 4-7 March 2012, Manama, Bahrain; - Abstracts, #90141 (2012).

Search and Discovery.com

Fault and Fold Orientations in the Central Rocky Mountains of Colorado and Utah

Eric A. Erslev, Davd Wiechelman

Rocky Mountain Association of Geologists

.... The software also outputs .DXF files of rose diagrams with user-specified smoothing for export to regional structure maps (Figs. 2-6). The smoothing used...

A Gravity and Magnetic Survey of the Ute Mountain Ute Indian Reservation, Colorado and New Mexico

Michael W. Webring, Gerda A. Abrams

Utah Geological Association

...), magnetic anomalies are shifted to the south. Both fields are characterized by smoothing and attenuation with distance so that a deep-seated source produces...

Application of time-lapse full waveform inversion of vertical seismic profile data for the identification of changes introduced by CO2 sequestration

Anton Egorov, Andrej Bóna, Roman Pevzner, Stanislav Glubokovskikh, Konstantin Tertyshnikov

Petroleum Exploration Society of Australia (PESA)

... data lack high frequencies. For all the inversions on synthetic data, we use 1D starting models created by smoothing VP, VS and density values...

Unsupervised Machine Learning as a Velocity Picking Assistant

Charles Ursenbach, Hassan Odhwani

International Meeting for Applied Geoscience and Energy (IMAGE)

..., forming very diffuse  horizons, because of  scatter. e) same as d), but after spatial smoothing of the  values within each group. Additional comments...

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

.... Several smoothing tests were undertaken on the model. A smoothing operator was chosen so that the long wavelength components of the sonic trend were still...

Adaptive regularization parameter estimation in image domain least-squares migration

Shen Sheng, Huazhong Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... velocity (Figure 2a) is the real velocity with Gaussian smoothing (Gaussian kernel radius of 190m). The PSFs calculated using the migration velocity...

Effect of Change of Wave Size on the Size and Shape of Ripple Marks

O. F. Evans

Journal of Sedimentary Research (SEPM)

... and smoothing of the ripples occur along with some displacement along the longitudinal axis. The effect is to produce an irregular and disintegrated...

The direct linear electromagnetic inverse with constraints

Peter Walker

International Meeting for Applied Geoscience and Energy (IMAGE)

... in the resistance has been removed by using a background resistance and smoothing constraints. Summary Figure 7: The ontology for the inverted resistance of Fig...

Abstract: Reflectivity Color Correction in Gabor Deconvolution; #90211 (2015)

Carlos Montana and Gary Margrave

Search and Discovery.com

... )| | αQ (τ, f ) is obtained by applying a smoothing operator to |Gs(τ , f )|. As θ(τ, f ) represents the attenuated source wavelet, its minimum-phase...

The Role of Sedimentary Fabric for Rock Typing and Model Upscaling in Carbonate Reservoirs; #50306 (2010)

Volker C. Vahrenkamp and Anouk Creusen

Search and Discovery.com

... – 10 cm; Length – 17 cm Loaded in Petrel 12 Upscaling to BHI Resolution & Segmentation into Principle Rock Types Coarsening and smoothing To match...

Late Permian Sedimentation in the Sverdrup Basin, Canadian Arctic: The Lindstrom and Black Stripe Formations

Benoit Beauchamp, Charles M. Henderson, Stephen E. Grasby, Laura T. Gates, Tyler W. Beatty, John Utting, Noel P. James

CSPG Bulletin

... unconformities extend across the deep-water axial trough. Unconformities are recognized as sharp erosional surfaces that may or may not be overlain by non...

Controls on Fabric Development and Morphology of Tufas and Stromatolites, Uppermost Pethel Group (1.8 Ga), Great Slave Lake, Northwest Canada

Michael C. Pope, John P. Grotzinger

Special Publications of SEPM

... surfaces are covered with bacteria In contrast though 50 em dendritic tufa fabrics most commonly are oversaturated conditions Jones and Kahle...

A Profile of Biogenic Sedimentary Structures in a Holocene Barrier Island-Salt Marsh Complex, Georgia (1)

Robert W. Frey, James D. Howard

GCAGS Transactions

... and smoothing the substrate. Examples of individual amphipod burrows are seen at arrows. Backshore, Sapelo Island beach. Scale in centimeters. Figure 3...

Modeling strain across mechanical sedimentary lithologic interfaces: geomechanical models derived from outcrop analysis

Elizabeth S. Petrie, James P. Evans

CSPG Bulletin

... in a smoothing of strain variations, while the 5-layer model captures strain variations that more closely match the fracture density observed in outcrop...