Abstract: AVAZ Inversion for Fracture Orientation and Intensity: a Physical Modeling Study; #90187 (2014)

Faranak Mahmoudian and Gary F. Margrave

Search and Discovery.com

...). The effect of natural fractures, when seismic waves propagating through them, can be well described by a medium with transverse isotropy (TI). Particularly...

The plug drum effect, or why your microseismic events may not be where you think they are

Guillaume Bergery, Zhishuai Zhang, Jing Du, D. Diller, T. Shuck, B. Fish

Unconventional Resources Technology Conference (URTEC)

... location in water. All of the microseismic monitoring projects in this area have similar behavior. This effect is observable for both horizontal...

Abstract: The Application of Extreme Attributes of PS Converted Wave; #90171 (2013)

Xiucheng. Wei, Xiang-Yang Li, Tiansheng Chen, and Lihua Jia

Search and Discovery.com

.... Furthermore, smaller average velocity ratios result in a larger gradient. For negative Rss0 , R ps ,ext is positive and decreases with increasing...

The Application of Image Processing Techniques for Complex Structures

V. Sudhakar, I. T. McMahon

Indonesian Petroleum Association

... gradient, constant velocity DMO has its limitations and has been upgraded (Black et al., 1986) to deal with time-variant velocity field by taking...

Fault Shadow Issues and Resolution in Model and Real Data

Andrew J. Davidoff, Ika Ratna Novianti

Indonesian Petroleum Association

... misinterpretations. In the time domain, normal faults can produce fault shadows. This is apparent even in environments with simple velocity fields...

Depositional Effects of Flow Nonuniformity and Stratification Within Turbidity Currents Approaching a Bounding Slope: Deflection, Reflection, and Facies Variation

Ben Kneller, William McCaffrey

Journal of Sedimentary Research (SEPM)

... of the instantaneous spatial velocity gradient, u·u (the flow nonuniformity) and how the velocity changes with time, u/t (the unsteadiness of the flow...

First-Arrival Traveltime Inversion in the CMP Domain: Method and Application

Search and Discovery.com

... (slowness) or Va ( apparent velocity in horizontal direction), x is offset between source and receiver and tau is the intercept time. Figure 2: First...

Influence of beach morphodynamics on the distributions of the opheliid polychaete Euzonus sp. and its feeding burrows on a sandy beach: Paleoecological and paleoenvironmental implications for the trace fossil Macaronichnus segregatis

Koji Seike

PALAIOS

...). Given these observations, the beach-face gradient is defined as the angle between a horizontal plane and the beach slope between the mean tide level...

The Use of Seismic Refraction Method in Slope Failure Investigation

Khairul Anuar Mohd. Nayan, Rahman Yaccup, Abd. Rahim Samsudin, Umar Hamzah, Abd. Ghani Rafek

Geological Society of Malaysia (GSM)

... with a distinct first layer velocity indicated by a continuous initial high distant-time gradient that has been computed to be in the range of 334 mls...

The Isolation of Settling-Velocity Fractions of Sand-Size Material: New Possibilities for the Settling Tube Technique: RESEARCH METHOD PAPER

Reinhard Oehmig , Klaus H. Michels

Journal of Sedimentary Research (SEPM)

...The Isolation of Settling-Velocity Fractions of Sand-Size Material: New Possibilities for the Settling Tube Technique: RESEARCH METHOD PAPER Reinhard...

Seismic Applications of the Velocity Log

W. G. Rimmer

CSPG Bulletin

..., Fig. 3, but a high velocity bed (23,000 ft/sec) has been added above the shale, and a gradient down to 15,500 ft/sec introduced over 150 feet, then 100...

Abstract: Structurally-Consistent Interval Velocity Variation with Azimuth; #90187 (2014)

Darren Schmidt, Alicia Veronesi, Chris Davison, and Jeff Durand

Search and Discovery.com

...Abstract: Structurally-Consistent Interval Velocity Variation with Azimuth; #90187 (2014) Darren Schmidt, Alicia Veronesi, Chris Davison, and Jeff...

Drilling Geomechanics Salt Creep Monitoring: How to Optimize Mud Weight in Real Time and Get a Safe Time Window While Drilling, Tripping, Running and Cementing Casing in Salt Formations; #41954 (2016)

Joao Paulo Castagnoli, Cyrille Montesinos, Diego Muñoz

Search and Discovery.com

...pth. Both creep models assume that the creep velocity is constant with time. Figure 4 allows us to confirm the effect of deviatory stresses and temperat...

Lithologically Controlled Pore Pressure Prediction and Geomechanical Modeling Using Probabilistic Multivariate Clustering Analysis and an Expert System

Alan A. Curtis, Eric Eslinger, Randy Nickerson, Siva Nookala, Francis Boyle

Unconventional Resources Technology Conference (URTEC)

...), overburden stress (dark brown), temperature gradient (red), salinity (pink) and DT_fluid (green). Depth in TVDss. Upscaling for Velocity Modelling...

Characterization of a Sediment Core from Potential Gas-hydrate-bearing Reservoirs in the Sagavanirktok, Prince Creek, and Schrader Bluff Formations of Alaska's North Slope: Part 5Acoustic Velocity Core Studies

R. F. Sigal, C. Rai, C. Sondergeld, B. Spears, W. J. Ebanks Jr., W. D. Zogg, N. Emery, G. McCardle, R. Schweizer, W. G. McLeod, J. Van Eerde

AAPG Special Volumes

... shale samples, one from 1800 ft (549 m) and one from 2000 ft (610 m), were selected for velocity measurement. Measurements were made on horizontal...

Technique and Methods of Geophysical Exploration in Canada

A. I. Bogdanov

Petroleum Geology: A Digest of Russian Literature

... of a spring, and has a system for dampening microseisms. The instrument is very stable; drift of zero is generally less than 0.5 mgl per month. Dreyfus effect...

High Sensitivity Aeromagnetometry in Indonesia: 1967 - 1972

G. Royer

Indonesian Petroleum Association

... ITI gamma method) Special processing: non-linear filtering upward continuation of the total magnetic field vertical gradient automatic...

Abstract: 3-D Seismic Expression of Karst Using 3-D Synthetic Seismic Model of Modern Analogs, by X. Janson and S. Fomel; #90090 (2009).

Search and Discovery.com

Reflection Tomography for Validation of Subtle Structures: A Case History from Southern Tunisia

Search and Discovery.com

Flow velocity model for a coastal estuarine sandbar using multivariate regression

Edlic Sathiamurthy, Nurul Syamimi Pauzi

Geological Society of Malaysia (GSM)

...Flow velocity model for a coastal estuarine sandbar using multivariate regression Edlic Sathiamurthy, Nurul Syamimi Pauzi Bulletin of the Geological...

Abstract: TTI Anisotropic Depth Migration: Which Tilt Estimate Should We Use?; #90211 (2015)

Francois Audebert and Volker Dirks

Search and Discovery.com

...-way traveltime along the normal ray, the apparent slowness (traveltime gradient) at the emergence point, and the apparent NMO velocity, Vnmo (related...

Extended Abstract: Using Crosswell Measurements to Enhance Velocity Model Calibration for Real-Time Microseismic Monitoring

Leah J. Hogarth, Conrad Kolb, Joël Le Calvez

GCAGS Transactions

... and (2) extending the depth coverage for velocity model calibration in a horizontal monitoring configuration. In both cases, using crosswell sources...

Pressure Prediction in a Complex Setting Based on Field Data and Geomechanical Modeling: Mad Dog Field, Gulf of Mexico

Search and Discovery.com

Hydrodynamic aquifer or reservoir compartmentalization?

Ann Muggeridge, Hisham Mamode

AAPG Bulletin

... in both wells at a given depth. A horizontal pressure gradient occurs in the water because of the hydrodynamic aquifer. The effect of the horizontal...

Particle Roundness and Surface Texture Effects on Fall Velocity: NOTES

Garnett P. Williams

Journal of Sedimentary Research (SEPM)

... velocity and flume behavior of large non-spherical particles, stated that the effect of particle roundness is negligible. Some simple experiments...