The Evolution of FWI and its Perceived Benefits

Tony Martin, Andrew Long

Australian Petroleum Production & Exploration Association (APPEA) Journal

... wave energy. This made early FWI applications suitable for shallow water and shallow data environments. In addition to the local velocity gradient...

Acoustic Log Measurements in the Lower Eagle Ford Formation in Brazos and Robertson Counties, Texas and Their Implications on Completion Design

Richard Reischman, Scott Brooks, Trevor Willms, Tony L. Albrecht, John J. Walsh, Edgar Arteaga

Unconventional Resources Technology Conference (URTEC)

... horizontal Young’s moduli and Poisson’s ratios were different. This difference depends on the degree of anisotropy in the formation. The effect...

Transportation of Detritus by Moving Water: Part 1. Transportation

Filip Hjulstrom

AAPG Special Volumes

... factor. Subsidiary factors are the velocity gradient and the physical characteristics of the water and particles of sediment. Accordingly, the main...

Elastic full-waveform inversion of 4C ocean-bottom seismic data: Model parameterization analysis

Jian Cao, Romain Brossier, Ludovic Mtivier

International Meeting for Applied Geoscience and Energy (IMAGE)

... of the Vp gradient is larger than the one for the Vs gradient. Although it has a negative influence on an isolated Vs reconstruction, the binding effect...

Contributions of Compaction and Aquathermal Pressuring to Geopressure and the Influence of Environmental Conditions (1)

XIAORONG LUO and GUY VASSEUR

AAPG Bulletin

... obtained with and without aquathermal pressuring shows that this effect increases very little with the temperature gradient (Figure 4). Sealing...

Accelerated augmented Lagrangian full-waveform inversion based on truncated randomized singular value decomposition

Jiahang Li, Hitoshi Mikada, Junichi Takekawa

International Meeting for Applied Geoscience and Energy (IMAGE)

... Calculate Gradient and Step-size Calculate and Reshape the velocity field randomized Singular Value Decomposition Single frequency loop k=k+s (a) 4...

The Development of Clast Fabric in Mudflows

John F. Lindsay

Journal of Sedimentary Research (SEPM)

... to settle under gravity. This will probably have little effect on the development of fabric during flow, except that the velocity gradient will be greater...

Fiber Optic Sensing-Based Production Logging Methods for Low-Rate Oil Producers

Ge Jin, Kyle Friehauf, Baishali Roy, Jesse J. Constantine, Herbert W. Swan, Kyle R. Krueger, Kevin T. Raterman

Unconventional Resources Technology Conference (URTEC)

...) or distributed sensors (Paleja et al., 2015); using Doppler effect of SoS to estimate flow velocity (Bukhamsin and Horne, 2016); associating borehole acoustic...

Velocity estimation via model order reduction

Alexander V. Mamonov, Liliana Borcea, Josselin Garnier, Jrn Zimmerling

International Meeting for Applied Geoscience and Energy (IMAGE)

.... The initial guess co (x) is a one dimensional gradient in depth. In the right column of Figure 3 we compare the velocity estimates obtained from data...

A three-component field study of the effect of the low-velocity layer on converted-wave seismic data

Dan Cieslewicz, Don C. Lawton

CSPG Special Publications

...A three-component field study of the effect of the low-velocity layer on converted-wave seismic data Dan Cieslewicz, Don C. Lawton 1998 217 220...

Sorting of Sediments in the Light of Fluid Mechanics

Douglas L. Inman

Journal of Sedimentary Research (SEPM)

... of a natural stream. Assume a horizontal bottom with a current flowing in the x-direction, and the average horizontal velocity, u, a constant for any given...

Velocity Logging and Its Geological and Geophysical Applications

H. R. Breck, S. W. Schoellhorn, R. B. Baum

AAPG Bulletin

...Velocity Logging and Its Geological and Geophysical Applications H. R. Breck, S. W. Schoellhorn, R. B. Baum 1957 1667 1682 41 8. (August) In its...

A 3D Seismic Exploration Method for Fractured Gas Reservoirs

James J. Reeves, W. Hoxie Smith

West Texas Geological Society

... and geometries that effect fracture distributions. Gas Prediction / Seismic Phase Gradient AVO Attribute Gas production data is analyzed using a cross plot...

3-D AVO Analysis and Modeling Applied to Fracture Detection in Coalbed Methane Reservoirs

Antonio C.B. Ramos, T.L. Davis

Rocky Mountain Association of Geologists

... affecting the AVO gradient in the same way (large A 0 correspond to large AVO gradients). The effect of changmg the velocity contrast 10 bin trace 40 20...

Geophysical Prospecting for Oil

Donald C. Barton

AAPG Bulletin

... MAPPED BY DIFFERENT METHODS Three quantities: (1) the horizontal variation of the horizontal gradient of the intensity of gravity, that is, the rate...

Velocity as a Problem in Mississippi

R. R. Phillips

GCAGS Transactions

... it is because we don't know what is happening below the Chalk and what effect it has on our velocity gradient. FIGURE VII This figure shows a contour map...

Azimuthal AVO Gradient Anisotropic Analysis on Prediction of Fractures on Barnett Shale

Shiguang Guo, Bo Zhang, Tengfei Lin, Kurt J. Marfurt

Unconventional Resources Technology Conference (URTEC)

... ano maly around fault zone in the A VO gradient volume of azimuth 90o and 135o co mpared to the azimuth of 0o and 45o . Figure 6 shows Horizontal...

Prediction and Analysis of Geomechanical Properties of the Upper Bakken Shale Using Artificial Intelligence and Data Mining

George K. Parapuram, Mehdi Mokhtari, Jalel Ben Hmida

Unconventional Resources Technology Conference (URTEC)

..., and Minimum Horizontal Stress and these can be obtained from geomechanical well logs. Unfortunately, these logs are not widely used because of the high cost...

Image processing of jointly acquired 3D DAS-VSP data with an OBN survey in the Middle East

G. Yu, H. Liu, Y. Zhang, H. Chen, X. Li, L. Duan, G. Cambois, J. Cowell, J. Mason, Y. Chen, J. Wu

International Meeting for Applied Geoscience and Energy (IMAGE)

... procedure, joint domain full waveform inversion (JDFWI) for velocity model update, and one way wave equation multiple migration (OWEMM) method were...

Effects of Differential Cementation on the Sonic Velocities of Upper Cretaceous Skeletal Grainstones (Southeastern Netherlands)

Jeroen A. M. Kenter, Bruce W. Fouke, Marc Reinders

Journal of Sedimentary Research (SEPM)

... the cementation effect on sonic velocity at high porosities. Linear and nonlinear time-average regressions show strong correlation between velocity and porosity...

Turbulent Flow

Gerard Middleton, John B. Southard

Special Publications of SEPM

... and But as a consequence of this gentle velocity look at Figure 1.16. gradient over most of the flow depth, near the bottom boundary (where viscous...

Stabilizing two-term clock-drift inversion in ocean-bottom node processing

Beng Seong Ong, Zhaojun Liu, Carsten Udengaard

International Meeting for Applied Geoscience and Energy (IMAGE)

... and clockdrift. The biggest effect is due to water velocity variation. The clock-drift effect in this example is subtle but is flatter with clock-drift...

Pore Pressure Prediction: Geological Perceptions

S. Shaker

Houston Geological Society Bulletin

...Pore Pressure Prediction: Geological Perceptions S. Shaker 2002 24 29 An interval velocity profile is usually used to predict pore pressure...

ABSTRACT: Sensitivity Considerations in Building Velocity Models for the Nile Delta’s Messinian, by El-Bassiony, Ahmed; Eid, Mamdouh; Walker, Chris; Caselitz, Bertrand; ElAmir, Ashraf; Hemdan, Mahmoud; #90141 (2012)

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Study to Predict Liquid Holdup in Undulating Pipeline

Leksono Mucharam, Evi Wahyuningsih, Muchammad Ircham

Indonesian Petroleum Association

.... “Liquid Holdup in Wet-Gas Pipelines”, Tulsa. Y. Fan, Q. Wang, H. Zhang,” A Model to predict Liquid Holdup and Pressure Gradient of Near Horizontal Wet...