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The AAPG/Datapages Combined Publications Database
Showing 34,490 Results. Searched 200,663 documents.
Analysis of Electromagnetic Depth Sounding Responses Over a Layered Earth: Investigating Oil & Gas Seeps in the Petroleum Provinces
Shastri L. Nimmagadda, Andrew Ochan
Petroleum Exploration Society of Australia (PESA)
... and detectability effects. In frequency-domain sounding, amplitude response curves of layer-sequences show the effect of layer conductivity, layer...
2016
Seismic Migration: Part 7. Geophysical Methods
Ken Larner, David Hale
AAPG Special Volumes
... a running of the wave equation backward in time, starting with the measured waves at the earth's surface P(x,z = 0,t), in effect pushing the waves backward...
1992
Vz denoise and P/Z matching in 3D curvelet domain
Yong Ren, Chenhao Yang, Tim Seher, Matt Hawke, Eddie Cho
International Meeting for Applied Geoscience and Energy (IMAGE)
... the combination of hydrophone (P) and vertical geophone (Z) components to separate upgoing and downgoing wavefields while attenuating ghosts and multiples...
2022
Using Reflected Phases to Improve Depth Resolution of Microseismic Source Locations from Single-Well Observations
James Rutledge, Nobukazu Soma
Unconventional Resources Technology Conference (URTEC)
... times among geophone sensors rather than absolute picked arrival times. This gives us an advantageous effect from correlated picked time. In this study...
2013
Broadband Seismic Technology and Beyond: Part II: Exorcizing Seismic Ghosts
Lasse Amundsen, Martin Landrø
GEO ExPro Magazine
... hydrophone and geophone measurements to attenuate the effect of ghost reflections from the sea surface. Hydrophone and geophone measurements at 13m...
2013
Abstracts: Recovery of Low Frequency Data from 10Hz Geophones; #90173 (2015)
Malcolm B. Bertram, Gary F. Margrave
Search and Discovery.com
... was prompted by a discussion about geophone response at low frequencies, and that the response of a 70% damped element can be approximated by a second-order...
2015
Improving Depth Prediction Accuracy of Quantified Drilling Hazards
W. Scott Leaney, William H. Borland
Geological Society of Malaysia (GSM)
..., that can lead to excess pore pressure in a given lithology. In addition, there may be several of these processes in effect in the same formation...
1996
Super-virtual interferometry for noise elimination on vertical seismic profiling (VSP)
Yicheng Zhou, Yang Cui, Sherif Hanafy
International Meeting for Applied Geoscience and Energy (IMAGE)
... convolution operation on the reinforced gathers to obtain the reinforced gathers at the fixed geophone R (Figure 1c and equation 3...
2024
Aspects to the Resolving Power of 3D Seismic Surveys
Wolfgang Houba
Geological Society of Malaysia (GSM)
... of a straight geophone line and a symmetrical shotpoint arrangement on a straight line perpendicular to the geophone line. The area in the subsurface...
1985
Applications and Limitations of Dip Shooting
E. E. Rosaire and Joseph L. Adler
AAPG Bulletin
... the reflection arrival times for the farthest geophone should be abnormally short, and when recording down-dip they should be abnormally long. The method...
1934
Abstract: Acquiring Low Frequencies : Sweeps, Sensors, Sampling and Stories; #90224 (2015)
Olivier Winter, Anna Leslie, and Forest Lin
Search and Discovery.com
... in time domain (c). The recorder/sensor system The geophone coil motion can be modeled as a simple harmonic oscillator, where its response shape...
2015
Abstract: Local Radial Basis Functions for Helmholtz Equation in Seismic Inversion; #90255 (2017)
Hebert Montegranario, Mauricio Londoño
Search and Discovery.com
...Abstract: Local Radial Basis Functions for Helmholtz Equation in Seismic Inversion; #90255 (2017) Hebert Montegranario, Mauricio Londoño AAPG...
2017
Anisotropy analysis from 3D VSP surveys acquired at Otway site
Sofya Popik, Andrej Bona, Roman Pevzner
Petroleum Exploration Society of Australia (PESA)
... already been reported at the Otway site. Comparison of geophone and DAS VSP data and its application for anisotropy analysis is presented...
2019
An Introduction to Continuous Electric Logging while Drilling
Jan L. Arps
GCAGS Transactions
... formations already penetrated. The system utilizes two toroidally wound coils located around the logging sub. The upper, or transmitter coil, is energized from...
1964
Geological Applications of Reservoir Engineering Tools: PART 1
John Farina
AAPG Special Volumes
... pressure is 150 psia? [EQUATION] End_Page 10------------------------- PROBLEM # 1 Investigate the effect of a damage zone on production rate...
1984
A Practical Discussion of 3D Seismic Surveys
Howell Pardue, Stephen Jumper, Frank Brown, Peter Morton
West Texas Geological Society
... and have had a detrimental effect on the overall results of the project. Fold refers to the number of source-to-receiver midpoints that lie within...
1994
Abstract: Microseismic Event Locations Uncertainity and Acquisition Geometry; #90224 (2015)
Amna Feroz and Mirko van der Baan
Search and Discovery.com
... an analysis to illustrate the effect of acquisition geometry and source receiver distance on event locations uncertainty. Location Uncertainty...
2015
Exorcising the Ghosts The New Streamer Technology Launched by PGS
Lasse Amundsen, Martin Landrø
GEO ExPro Magazine
... notches (zeros) in the seismic frequency band. The resulting filter effect on the recorded data restricts streamer towing depths to a range of about six...
2007
Adjustments of Velocity Logs to Tie Geophone Surveys
Warren Hicks
Oklahoma City Geological Society
...Adjustments of Velocity Logs to Tie Geophone Surveys Warren Hicks 1961 135 138 Kokesh, F. P. and Blizard, R. B.: Geometric Factors in Sonic Logging...
1961
Abstract: Enhanced Fluid Characterization for Improved Saturation & Connectivity; #91204 (2023)
Tariq Mattar, Abdulelah Bingaith, Sherif Ghadiry, Ramy Ahmed
Search and Discovery.com
... connectivity across the hydrocarbon column and hydrocarbon typing through Reservoir Fluid Geodynamics applications by constructing Flory-Huggins-Zuo equation...
2023
II. Migration to Remedy Geometric Distortions
Robert E. Sheriff
AAPG Special Volumes
...-focus effect. The legend, "low, not again," indicates that past failures were due to a lack of understanding of seismic principles and geometric effects...
1981
Induction-Electrical Logging in the Texas-Oklahoma Panhandle
H. W. True
Panhandle (Texas) Geological Society
... log provides a better resolution of true resistivity. The induction log minimizes the effect of the mud column. Effects of adjacent beds on the bed...
1957
Study on Characteristic Variability of Weak Signal in High Density Seismic Acquisition; #41351 (2014)
Wujin Chen and Anchu Wu
Search and Discovery.com
... acquisition. Theory of Weak Signal Analysis A simulation based on Zoppritz equation was processed to research the impact on the weak signal...
2014
Application of distributed fiber optic and borehole-surface jointly acquired seismic data in high-resolution processing of conventional seismic
Zhanqing Yu, Cheng Wang, Miao Kun
International Meeting for Applied Geoscience and Energy (IMAGE)
... the observation of multiple movement of a single geophone in the well, and the upgoing wave was used to calibrate the surface seismic profile(Li yanpeng. et.al....
2024
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
... in the array. In reflection seismology, the purpose of using seismic geophone arrays is to enhance the signal-to-noise (S/N) ratio. Moreover...
2018