Gulf Coast Geosyncline

Donald C. Barton , C. H. Ritz, Maude Hickey

AAPG Bulletin

... of the effect of the variation of the specific gravity of the basement were made by the following formula which was derived for the gradient which...

Gulf Coast Geosyncline

Donald C. Barton , C. H. Ritz a, Maude Hickey

AAPG Special Volumes

... of the effect of the variation of the specific gravity of the basement were made by the following formula which was derived for the gradient which would...

Numerical modeling of microfracturing and primary hydrocarbon expulsion in the Jurassic Lower Tuwaiq Mountain Shale: A conceptual framework

Syed Haider, Tadeusz W. Patzek, Thomas Finkbeiner, and Ralf Littke

AAPG Bulletin

... of minimum horizontal stress, ∂Sh/∂z, estimated using the multiple diagnostic fracturing injectivity tests is 0.86–0.96 psi/ft (19–1 kPa/m). The gradient...

Studies on Influential Factors of Flowback and Productivity of MFHWs and a Field Case in Shale Gas Formations

Guicheng Jing, Zhangxin Chen

Unconventional Resources Technology Conference (URTEC)

.... The proppant particle diameter has a very important effect on the critical flow velocity. This model is applied to calculate and study the effect...

Effects of Overburden Anisotropy and Vertically Aligned Fractures on P-Wave Azimuthal AVO Responses

Fatkhan, Yudi Yanto, Nofri Faruza Said

Indonesian Petroleum Association

... are modeled. It is clear that the VTI overburden modified the AVO gradient in all cases since the anisotropic parameter δ has a strong effect...

Lithology-Controlled Stress Variations: A Case Study of the Woodford Shale, Oklahoma

Xiaodong Ma, Mark Zoback

Unconventional Resources Technology Conference (URTEC)

...) in Northern Oklahoma. We concentrate on the stress variations along two WDFD horizontal wells. We present evidence of stress variations with lithology...

ABSTRACT: Reflection Tomography for Validation of Subtle Structures: A Case History from Southern Tunisia; #90051 (2006)

Harald Granser, Oezsen Refik

Search and Discovery.com

... static problems due to sanddunes at surface with low velocities but also by uncertainties in depth-conversion because of velocity variations...

Abstract: Estimation of Dispersive Parameters of Surface Wave Using the Generalized S Transform; #90187 (2014)

Roohollah Askari and Robert J. Ferguson

Search and Discovery.com

... to simultaneously estimate wavenumber, group velocity, phase velocity and frequency dependent attenuation. The group velocity is obtained from...

Bed Configurations in Steady Unidirectional Water Flows. Part 2. Synthesis of Flume Data

John B. Southard, Lawrence A. Boguchwal

Journal of Sedimentary Research (SEPM)

... variables U and d but also by 0 and d. Here, however, the effect of flow depth is much less: the effect of the substantial change in velocity with flow...

An Interpreter's Guide to Improvements in Depth Imaging through Model-Based Velocity Estimation and Refinement

Andy Furniss

Petroleum Exploration Society of Australia (PESA)

... the horizontal component. In any situation where there are vertical or lateral velocity variations anywhere along the seismic raypath, the two velocities...

Interpreting the Concept of the Sedimentation Unit

Alan V. Jopling

Journal of Sedimentary Research (SEPM)

... velocity and depth-ratio vary systematically from one experiment to the next, (2) the deposition of horizontal bedding over a range of steady-state...

Pore-Scale Simulation of Pre-Darcy Flow and Boundary-Layer Effects in Low-Permeability Porous Media Using the Lattice Boltzmann Method

Quanyu Pan, Linsong Cheng, Pin Jia, Renyi Cao, Yongchao Xue, Hassan Dehghanpour

Unconventional Resources Technology Conference (URTEC)

... and analyzing their effects across regular and irregular pore structures, the simulations qualitative analyze their effect on the velocity– pressure gradient...

A Hydrodynamic Classification of Grain Shapes

J.P. Le Roux

Journal of Sedimentary Research (SEPM)

... Sedimentologia, v. 15, p. 33-45. JANKE, N.C., 1966, Effect of shape upon the settling velocity of regular convex geometric particles: Journal of Sedimentary...

Possible Utilization of Electrophoretic Phenomenon for Separation of Fine Sediments Into Grades

George Tchillingarian

Journal of Sedimentary Research (SEPM)

... that concentration will have some effect upon cataphoretic velocity, which should also be evaluated...

Flow Transformations in Particulate Gravity Currents

Dave Waltham

Journal of Sedimentary Research (SEPM)

... the flow velocity varies with height. A flow in which the velocity increases uniformly with height would have a gradient given simply by u/z = 2/h (i.e....

Reconstruction of the Subsurface Reflected Wavefield on a Dense Grid from Multisensor Streamer Data

M. Vassallo, K. Eggenberger, D.J. van Manen, P. Watterson, A. Raskopin, A. Özbek

Indonesian Petroleum Association

..., recording the particle velocity vector in addition to the pressure, and showed that the value of the horizontal particle velocity measurement helps...

Chapter 8: Evaluation of Anomalous Pressuring and Gas Saturation Using 2-D and 3-D Visualizations of Well Log Information

Zun S. Jiao, Ronald C. Surdam

Montana Geological Society

... on the velocity-depth plot. In order to better isolate the effect of gas saturation and anomalous pressure on the velocity profiles...

How to Improve the Definition of Seismic Reflection Data

D. Michon, R. Garotta

Indonesian Petroleum Association

... to record. This effect depends on the apparent horizontal velocity of the signal. In fact, reflections even horizontal ones, appear slanted due...

Amplitude inversion of OBS direct arrivals for seabed elastic properties

James Gaiser, Moacyr de Souza Bazerra, James Simmons

International Meeting for Applied Geoscience and Energy (IMAGE)

... range over ±5000 m and the three components are pressure from the hydrophone (H), particle velocity from the vertical (V), and radial (R) horizontal...

Abstract: Macro-velocity Model Building in a Laplace-domain Waveform Inversion; #90174 (2014)

Changsoo Shin and Wansoo Ha

Search and Discovery.com

... ú ë û The velocity model is updated by the sum of each gradient direction normalized by the pseudo-Hessian (Shin and Cha, 2008) as Ns l+1 l pk = pk...

Experimental Low-Altitude Aeromagnetic Reconnaissance for Petroleum in Arctic National Wildlife Refuge, Alaska, Using Horizontal Gradients--A Progress Report: ABSTRACT

Terrence J. Donovan, John D. Hendricks, Alan A. Roberts, Patricia T. Eliason

AAPG Bulletin

... of the resultant horizontal gradient vector relative to the flight path. This calculation provides data for the unmeasured area between adjacent flight lines...

Horizontal Pressure Disequilibrium and Its Indication on Fluid Continuity in Shale Plays

Xinyu Xia, Yongli Gao

Unconventional Resources Technology Conference (URTEC)

... and in the absence of horizontal migration. Original pressure gradient before the uplift is assumed to be 0.7 – 0.9 psi/ft from up-dip to down-dip. The pore...

Abstract: Geomechanics, Anisotropy and LMR; #90174 (2014)

Marco Perez, Bill Goodway, and David Close

Search and Discovery.com

..., Stress Estimation in Faulted Regions: The Effect of Residual Friction, SPE/ISRM 47210 Tsvankin, I., 1997, Anisotropic parameters and P‐wave velocity...

Some Principles and Techniques Used in Reconstructing the Hydraulic Parameters of a Paleo-Flow Regime

Alan V. Jopling

Journal of Sedimentary Research (SEPM)

... of bed forms are the slope of the energy gradient, the depth, the size of the bed material, and the fall (settling) velocity of the bed material. Many...

Building the Messinian Salt Layer in the East Mediterranean Basins

Search and Discovery.com