Pebble Morphology of an Ancient Conglomerate: The Middelvlei Gold Placer, Witwatersrand, South Africa

B. G. Els

Journal of Sedimentary Research (SEPM)

... in this study is relatively small, a significant decrease in sphericity with increasing size was found. Pebble roundness was determined for 444...

Integration of 2D Analog and 3D High Resolution Seismic Data for Regional Shallow Overburden Description in Tangguh Field, Indonesia

M.R. Husni Sahidu, Sarah Anzaita Putri, Christopher S. Birt, Rini Apriani

Indonesian Petroleum Association

... fields will be developed and an additional LNG Train will be added. Shallow overburden description in Tangguh was historically limited to small discrete...

Estimation of Error in Grain Size Analysis

J. C. Griffiths

Journal of Sedimentary Research (SEPM)

... A subsamples it is necessary to show that se2 is small compared with ss2. This is a rather inelegant termination to such a rigorous analysis and it appears...

Abstract: Critical Evaluation of Uncertainty Quantification Approaches for Large Scale Subsurface Problems, by Dongxiao Zhang; #90066 (2007)

Search and Discovery.com

Tutorial on Compressive Sampling

Search and Discovery.com

..., medical images, seismic data, can be stored in compressed form by expressing them in terms of a linear basis, wherein many of the coefficients...

Chapter 7: Estimating the Thickness of Thin Beds

Tom Wittick

North Texas Geological Society

... we go from a higher impedance shale to a lower impedance sand so the reflection coefficient for the top of the sand is negative (a white trough...

Estimating the Thickness of Thin Beds

Abilene Geological Society

... shale to a lower impedance sand so the reflection coefficient for the top of the sand is negative (a white trough). At the base of the sand we go from...

Residual Hydrocarbons in a Water-Saturated Medium: A Detection Strategy Using Ground Penetrating Radar

Changryol Kim, Jeffrey J. Daniels, Erich D. Guy, Stanley J. Radzevicius, Jennifer Holt

Environmental Geosciences (DEG)

... and the mechanical energy-based seismic reflection technique. However, with GPR, scattering occurs at impedance contrasts produced by changes in electrical...

Seismic Reef Expression in the North Sumatra Basin

K. Wirjodihardjo

Indonesian Petroleum Association

.... In these seismic models, the reflection coefficients convolved by a sinusoidal zero phase wavelet of (8-17-40-45) Hz are derived from the OBS-1 and A-13...

Broadband reconstruction of seismic signal with generative recurrent adversarial network

Zhijun Zhang, Wei Song, Wei Wang

International Meeting for Applied Geoscience and Energy (IMAGE)

... beside the wells and the corresponding sequence of reflection coefficients as labels. In addition, In addition, based on random simulation, the reflection...

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

Fatkhan, Yudi Yanto, Nofri Faruza Said

Indonesian Petroleum Association

... can change reflection responses for small angles of incidence (<200); although the overburden is weakly anisotropic. If the Thomsen’s anisotropic...

The impact of seismic nodes on enhancing subsurface imaging for mining „ A case study over the Tamarack Nickel field

Eamonn Murray, Andrew Stone, Celina Giersz, Amine Ourabah, Brian Bengert

International Meeting for Applied Geoscience and Energy (IMAGE)

... by a corresponding decrease in velocity, cancelling out one another. Calculated reflection coefficients are below 0.05 and reflection seismic is effectively...

The Look Ahead VSP Survey: Its Utility and Future, by Robert J. Brewer #40060

Search and Discovery.com

Sand Bodies on Coastal Plain Shelves: Holocene Record of the U.S. Atlantic Inner Shelf Off Maryland

Michael E. Field

Journal of Sedimentary Research (SEPM)

... at reflector C1 inshore. Several small channels are incised into Unit C at depths exceeding 100 m below sea level. The middle reflection unit, Unit B, is about...

Sediment Dispersal Within the Cocos Gap, Panama Basin

Lynn G. Dowding

Journal of Sedimentary Research (SEPM)

... of a typical ocean basin, but on a more easily studied scale. Its small size, large variations in water depth and proximity to the continental...

A Study of Textural Changes in a Beach by Repeated Samplings

Marshall Schalk

Journal of Sedimentary Research (SEPM)

..., and M the median, were calculated. MECHANICAL ANALYSES--PLUM ISLAND TO COFFINS BEACH In Figure 2 the median diameter and coefficients of sorting...

Identification and Prediction of the High Heterogeneous Channel Sand in Southern Turgay Basin; #10515 (2013)

Yueying Hong, Hongmei Wang, Wenyuan Tian, and Aling Mo

Search and Discovery.com

... type of mud covering sand, whose top and bottom formations are mudstone, and top and bottom reflection coefficients are nearly equal, with opposite...

Fracture reservoir prediction method based on AVO disturbance variance

Guangrui Xiao, Yao Li, Yuru Zhang, Dekui Xu

International Meeting for Applied Geoscience and Energy (IMAGE)

..., Reflection coefficients and azimuthal AVO analysis in anisotropic media: SEG. Shen, F., J. Sierra, D. Burns, and M. N. Toksoz, 1999, Azimuthal offset...

Vertical Seismic Profiling in Hydrocarbon Exploration and Reservoir Development

Bob A. Hardage

Circum Pacific Council Publications

... not record the downgoing wavefield. The reflection coefficients that create the upgoing seismic wavefield have magnitudes that typically are in the range...

Labile Quartz-poor Sediments from Young Mountain Ranges in Northeast Papua

Bryan P. Ruxton

Journal of Sedimentary Research (SEPM)

... as the weakly weathered soils on the very steep mountain and hill slopes (table 2 and fig. 4). Mineralogically each fan is a direct reflection of its source...

Stress-Dependent Flow, Mechanical, and Acoustic Properties for an Unconventional Oil Reservoir Rock

Gang Han, Marte Gutierrez, Peter Schmitz

Unconventional Resources Technology Conference (URTEC)

...’s modulus, acoustic velocities, six stiffness coefficients, and Thomsen anisotropy parameters are measured under different levels of loading and confining...

Seismic-attribute Analysis for Gas-hydrate and Free-gas Prospects on the North Slope of Alaska

M. W. Lee, T. S. Collett, T. L. Inks

AAPG Special Volumes

... that a seismic stack section represents a filtered version of normal-incidence reflection coefficients. P-wave reflection amplitudes depend on the impedance...

Fracture and Stratigraphy Characterization Using Full-Resolution 3D Ground Penetrating Radar (GPR) in Cretaceous Carbonates

Rizky P. Sekti, Gregor P. Eberli, Mark Grasmueck, Brita Graham-Wall, Jeffrey Lukasik

Indonesian Petroleum Association

... to the centimeter, from a small laser detector (Grasmueck and Viggiano, 2007). This system consists of three or more rotating laser with range of 50-100 m...

Estimating Seismic Anisotropy Parameters from Rock Properties in Wolfcamp Shales, Midland Basin

Jaewook Lee, David Lumley

Unconventional Resources Technology Conference (URTEC)

... the shale anisotropy, we need to measure elastic stiffness coefficients from vertical seismic profiling (VSP) data or advanced dipole sonic logs. Since...

PETROLOGY OF POTASH ORE IN THE ESTERHAZY MEMBER OF THE MIDDLE DEVONIAN PRAIRIE EVAPORITE IN SOUTHEASTERN SASKATCHEWAN

L. M. FUZESY

Williston Basin Symposium

... the Esterhazy Member may be divided into carnallite-rich and carnallite-poor groups. It is inferred that most of the sylvite and a small...