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The AAPG/Datapages Combined Publications Database

Showing 33,054 Results. Searched 195,354 documents.

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Wide-Angle Seismic-Reflection and -Refraction Data from the Solomon Islands

A. K. Cooper, R. A. Wood

Circum Pacific Council Publications

... (squares; Furumoto et al, 1970). The dots show the location of sonobuoys. WIDE-ANGLE SEISMIC DATA 45 F i g u r e 3. Example of sonobuoy record collected...

1986

Web-Based Technologies for Real-time Directional Survey Quality Improvement

Jarrod S. DeVerse, Stefan Maus

Unconventional Resources Technology Conference (URTEC)

... and to gain a better understanding of how the various errors may actually impact the wellbore position. Finally, single-station QC tests...

2016

Enhanced Wellbore Placement Accuracy Using Geomagnetic In-Field Referencing and Multi-Station Correction

Stefan Maus, Matthew Herzl, Shawn DeVerse

Unconventional Resources Technology Conference (URTEC)

... to perpendicular than in the Eagle Ford well. As this angle approaches 90°, the effect on the measured azimuth is maximized. These examples show that the effect...

2015

Using Multiple Downhole VSP Arrays for Monitoring and Locating Passive Microseisms in the Oil Reservoirs; #41561 (2015)

Zuolin Chen

Search and Discovery.com

... the horizontal and vertical distributions of the one-standard location errors on four horizontal cross sections for depth levels of 0, 20, 40 and 60 m...

2015

Accuracy of Determination of Relative Gravity by Torsion Balance

Donald C. Barton

AAPG Bulletin

... of a considerable number of factors. It arises: (a) from all instrumental errors in the determination of the crude gradient at the station, (b) from...

1932

Geodetic Baselines Across the Gulf of California Using the Global Positioning System: Chapter 24: Part IV. Satellite Geodesy

T. H. Dixon, D. M. Tralli, G. Blewitt, J. P. Dauphin

AAPG Special Volumes

... simultaneously, a number of errors in a single station-single satellite observable are common and may be cancelled or greatly reduced in subsequent...

1991

Application of the Global Positioning System to PNG Petroleum Exploration

N. C. Talbot, G. J. Carman

Papua New Guinea (PNG) Petroleum Convention Proceedings

... reduction scheme as follows. Pseudo-range processing is used to refine the esti­ mates of the station co-ordinates in the WGS84 system and errors...

1990

Abstract: Seismic Array Response in the Presence of Intra-Array Variations in Element Weights, Elevations, and Positions; #90319 (2018)

Ryan Adhi Putra, Abdullatif Al-Shuhail

Search and Discovery.com

... case are 0 dB for 0° incidence angle and -45 dB for 45° and 90° incidence angles. Effects of errors were modeled using zero-mean Gaussian random errors...

2018

Using Reflected Phases to Improve Depth Resolution of Microseismic Source Locations from Single-Well Observations

James Rutledge, Nobukazu Soma

Unconventional Resources Technology Conference (URTEC)

... event and the i1-th station, and m-th master event and the i2-th station. When the estimated microseismic source location is a true position, equation (8...

2013

Heat Flow and Tectonics in the Western Ross Sea, Antarctica

D. K. Blackman, R. P. Von Herzen, L. A. Lawver

Circum Pacific Council Publications

... study. Instru­ mental errors are generally negligible. Electrical plug leakage occurred at the beginning of station 6 and resulted in the only...

1987

Handling Environmental Effects on Triaxial Induction Tools

Tom Barber, Steve Bonner, Tracy Broussard, Sophia Davydycheva, Dean Homan, Gerald Minerbo, Richard Rosthal, and Hanming Wang

Search and Discovery.com

... resistivity far from the location of the tool, making it very difficult to correct. Understanding the physics of this effect has allowed us...

2015

Abstract: Post-processing Technique to Relocate Microseismic Events Using the Double-Difference Method; #90187 (2014)

Fernando Castellanos and Mirko van der Baan

Search and Discovery.com

... is usually 1-D and cannot exactly represent the true velocities of the Earth (Pavlis, 1992). To reduce the effect of these errors, we apply a post-processing...

2014

Control and Adjustment of Surveys with the Magnetometer or the Torsion Balance

Donald C. Barton

AAPG Bulletin

... of residual error is present in practically every observation with a magnetometer or a torsion balance. Errors of some types can be avoided, or greatly...

1929

Abstract: High-Accuracy Relative Event Locations using a Combined Multiplet Analysis and the Double-Difference Inversion; #90174 (2014)

Fernando Castellanos and Mirko van der Baan

Search and Discovery.com

...: Presented at the CSEG Annual Convention. Pavlis, G., 1992, Appraising relative earthquake location errors: Bulletin of the Seismological Society of America...

2014

Better Accuracy from Sidescan Records: The Object-Chord Method

Malcolm James, P. M. Tong

Geological Society of Malaysia (GSM)

... both the feathering angle and layback errors and in certain circumstances, due to good field practices, eliminates them, resulting in more accurate...

1988

Relation of Deformational Fractures in Sedimentary Rocks to Regional and Local Structure

John F. Harris , Garvin L. Taylor , Jack L. Walper

AAPG Bulletin

.... The general form used in the investigation follows. Station Number_____ Formation_______ Location Strike of beds_____ Dip of Beds_____ Lithologic...

1960

Brunton Compass Attachment for Measurement of Horizontal Magnetic Intensity

John H. Wilson

AAPG Bulletin

.... The auxiliary magnet arm makes an angle of 120° (measured in a clockwise direction) from the north index of the compass box. In End_Page 1391...

1931

What is Horizontal Resolution?

L. R. Denham, R. E. Sheriff

Indonesian Petroleum Association

.... BLACKBURN, G., 1980, Errors in stacking velocity – true velocity conversion over complex situations: Geophysics v. 45 pp. 1405-1488. GARDNER, G.H.F....

1981

A Profile of Structural Gravity Survey on the North Sturgeon Lake Field

W. F. Stackler

CSPG Bulletin

... have only minor effects on the Bouguer maps. With half a mile station spacing, or more, several of the reef structures give no indication at all...

1959

Integration of Geological Data on Seismic Sections: GEOLOGICAL NOTES

L. F. Ivanhoe

AAPG Bulletin

... on the diagram. Such "geometric errors" are proportional to the angle of cross dip, depth, and method of plotting sections (straight ray, curved ray, et cetera...

1956

Seismic Array Response in the Presence of Intra-Array Variations in Element Weights, Elevations, and Positions; #42328 (2018)

Ryan Adhi Putra, Abdullatif A. Al-Shuhail

Search and Discovery.com

... by the combination of these errors on a 12-element equally-weighted geophone array with various elements’ spacing and wavelet incidence angle. The effects...

2018

Bouguer Gravity Data and a North South Gravity and Magnetic Profile from the Wiseman Area, Brooks Range, Alaska

D. T. Smith, D. B. Stone, J. T. Dillon

Pacific Section SEPM

... to the relative maximum of the local gravity anomaly in the east (fig. 3). This location has perhaps the best available east-west station control...

1987

How distinctive are flood-triggered turbidity currents?

Catharina J. Heerema, Matthieu J.B. Cartigny, Ricardo Silva Jacinto, Stephen M. Simmons, Ronan Apprioual, Peter J. Talling

Journal of Sedimentary Research (SEPM)

..., and an Aquadopp RCM at 35 masf recording at 30 min intervals (Fig. 1C). Station VE was deployed at 518 mwd, at a location 5.7 km from Napoleon III (Fig. 1A...

2022

The effects of seismic anisotropy on mining seismology

Andrew King

Petroleum Exploration Society of Australia (PESA)

... impact on the geotechnical interpretation. Figure 3. The effect on event location of using an isotropic (left) versus an anisotropic (right) velocity...

2019

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