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The AAPG/Datapages Combined Publications Database

Showing 16,322 Results. Searched 190,067 documents.

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A Comparative Study of 3-D Noise Attenuation Techniques

Daniel Wheaton, Yendri, Kusnarya

Indonesian Petroleum Association

... and coherent noise are studied. Predictive filtering in the f-x (frequency - space) domain for random noise suppression may be applied post stack as either...

1996

Section Five: Use of Gravity Methods on Diapiric Structures

New Orleans Geological Society

... aliasing (distortion due to sampling frequency) of the data. Once station spacing has been determined, the entire survey should be metered on a square...

1995

Post Migration Processing of Seismic Data

Dashuki Mohd.

Geological Society of Malaysia (GSM)

.... As seismic energy propagates through the earth, it experienc~s ~arious changes in frequency and phase characterIstIcs due to variations in the subsurface...

1994

Gravity's Role in a Modern Exploration Program

Gene Greene

Houston Geological Society Bulletin

... of the entire survey. At least two samples per wavelength are needed to prevent aliasing and adequately define an anomaly. Once the station spacing has...

1991

Interpretation of Airborne Magnetic Data of Upper Benue Trough, Northeastern Nigeria, #10888 (2016).

Omeje Maxwell, E.S Joel, lusegun Adewoyin, O. Meludu, O. Meludu

Search and Discovery.com

... are much wider than 2 km and therefore lie in a frequency range from aliasing which do not occur with a 1 km digitizing grid. Having digitized each...

2016

Long Climatic Time Series from Sediment Physical Property Measurements

Timothy D. Herbert, Larry A. Mayer

Journal of Sedimentary Research (SEPM)

... term evolution of climate in the Milankovitch frequency band, as well as to reconstruct patterns of carbonate sedimentation over time. Sedimentation...

1991

Unconventional Processing for 3D Data: A 1993 Case History

Claude Eizlini, Jacques Bonnafe, Bugi Kamil, Gilles Bitoun

Indonesian Petroleum Association

... a quick glance at typical data without statics will show some acceptably fair reflections albeit with a very narrow frequency band. The experience...

1994

Three Dimensional Exploration in California — A Case History

E. T. Selby

Indonesian Petroleum Association

... is that, to prevent aliasing, there must be at least two samples within the period of the highest frequency to be defined. The requirements for non-aliased space...

1977

Land 3D Acquisition Techniques Related to S.E. Asian Situation

Walter Ritchie

Indonesian Petroleum Association

... Acquisition Project Design Simple geometric relationships and sampling theory establish subsurface (and surface) spacing based on known dip, frequency...

1981

Geostatistical Integration of Crosswell Data for Carbonate Reservoir Modeling, Mcelroy Field, Texas

William M. Bashore, Robert T. Langan, Karla E. Tucker, Paul J. Griffith

Special Publications of SEPM

... the Grayburg Formation. CROSSWELL DATA ACQUISITION The data were collected using a swept-frequency , piezoelectric source and a seven-level hydrophone...

1995

Chapter One: Introduction to AAPG Memoir 42/SEG Investigations in Geophysics, No. 9, 7th Ed.

Alistair R. Brown

AAPG Special Volumes

.... The interpreter must consider data quality, frequency content, resolution, data phase, and data polarity, and must learn as much as possible about the data...

2011

The Wave Equation Applied to Migration

D. Loewenthal, L. Lu, R. Roberson, J. Sherwood

Southeast Asia Petroleum Exploration Society (SEAPEX)

... low cut, 30 Hz high cut) in order to avoid any drastic aliasing problems during the migration procedure. The model parameters were a constant...

1978

Recent Advances in Borehole Seismic

W. L. Nutt

Indonesian Petroleum Association

... seismic frequency bandwidth. The calibrated sonic log so obtained can be used in conjunction with the density log to produce a synthetic seismogram. Careful...

1984

Squeezing Every Last Drop Out of a Coarse 3D Oil Sands Dataset for Refining 3D Survey Design … A Case History; #41500 (2014)

Sylvestre Charles, Jim Hostetler, Jiwu Lin, Xiaoming Luo

Search and Discovery.com

... at the Devonian unconformity it is about 23 traces per bin. Assuming an average velocity of 2200m/s, for this bin size the maximum un-aliased frequency...

2014

Structural Analysis Using Spatial Filtering in Interior Plains of South-Central Alberta

J. E. Robinson , H. A. K. Charlesworth , M. J. Ellis

AAPG Bulletin

... (Fig. 14). In this way, any error caused by aliasing (folding of the true amplitude spectrum about a frequency with a wavelength of twice the digital...

1969

Full-Resolution 3D Radar Stratigraphy of Complex Oolitic Sedimentary Architecture: Miami Limestone, Florida, U.S.A.

Adrian Neal, Mark Grasmueck, Donald F. McNeill, David A. Viggiano, Gregor P. Eberli

Journal of Sedimentary Research (SEPM)

... and outcrops is problematic due to spatial aliasing. A 250 MHz full-resolution 3D GPR data set was collected over an area of 45 m × 24 m that encompassed...

2008

2012 Update of Southern Mid-Continent Theses and Dissertations

Neil H. Suneson

Oklahoma City Geological Society

...-Vargas, Alejandro, 2011, Suppression of aliasing artifacts on 3D land data via constrained least-squares migration. MS. Cataldo, Ernesto D., 2011...

2012

Abstract: A Faster, More Accurate Gaussian Simulation; #90172 (2014)

Colin Daly, Sandra Quental, Darcy Novak

Search and Discovery.com

... to aliasing. This can be improved by simulating on a larger volume by padding the data, then ‘cutting out’ the region of interest. The factor of simulation...

2014

Volumetric Curvature Attributes for Mapping Faults, Fractures, Depositional and Diagenetic Features

Satinder Chopra and Kurt J. Marfurt

Search and Discovery.com

... and tides Problems due to processing • Incorrect velocities • Migration operator aliasing Footprint removal (a) (b) Low (c) High (d) Time slices...

Unknown

Re-Evaluation of Hydrocarbon Potentials of Eastern Part of the Chad Basin, Nigeria: An Aeromagnetic Approach, #10405 (2012)

Emmanuel Anakwuba, Augustine Chinwuko

Search and Discovery.com

... in minimizing aliasing effects in sampled data (Bath, 1974). A grid interval of 1 km was used to obtain a 165 x 165 data-point grid. The gridded data...

2012

4D Acquisition Strategies For Australian Reservoir Monitoring Projects

Andrew Long

Petroleum Exploration Society of Australia (PESA)

.... The frequency of monitor surveys depends on the rate of change in reservoir state as production progresses and the cost-benefit model fo r 4D seism ic...

2006

Seismic expressions of a Miocene prograding carbonate margin, Mut Basin, Turkey

Xavier Janson, Gregor P. Eberli, Florence Bonnaffe, Fabrice Gaumet, Vincent De Casanove

AAPG Bulletin

..., even at 40-Hz frequency; however, most of the complex stratigraphic architecture is below standard seismic resolution. Sigmoidal outcrop geometries...

2007

Parsimonious Deconvolution

Jon F. Claerbout

Southeast Asia Petroleum Exploration Society (SEAPEX)

... high frequency noise. Varimax deconvolution decreases the noise. More realistic estimated filters bτ and further noise reduction can be achieved...

1980

Geophysical Study of a Magma Chamber Near Mussau Island, Papua New Guinea

S. V. Dadisman, M. S. Marlow

Circum Pacific Council Publications

... for an in-plane event. The frequency spectrum of the reflection shows a decrease in high-frequency content when compared to the sea floor reflection...

1988

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