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The AAPG/Datapages Combined Publications Database
Showing 5,455 Results. Searched 200,293 documents.
Characterization and simulation of transverse noise waves of a multisensor solid streamer
Viktor Smirnov, A. Sourice, J. Ribette, J. Mars, P. Herrmann
International Meeting for Applied Geoscience and Energy (IMAGE)
... characterization of these waves is proposed. Reviewing the classical model of transverse wave propagation, a new model of their velocity is obtained. This new...
2022
Reservoir Rocks Behaving Differently
Thomas Smith
GEO ExPro Magazine
... not hold, and the propagating waves interact with each other. If two frequencies simultaneously propagate through the reservoir rock, sum...
2014
Ultrasonics
W. P. Mason
Tulsa Geological Society
.... The attenuation and velocity of longitudinal and shear waves are measured for a given material and attenuation peaks and dispersion of velocity...
1955
Abstract: Time-Lapse FullWaveform Inversion Application To Seismic Monitoring Of CO2 Sequestration; #90224 (2015)
Wubshet Alemie
Search and Discovery.com
... parameters from known reservoir conditions. The the P-wave velocity generated by the fluid substitution model at different saturation level is used to build...
2015
Fracture Geometry Measurements by Analyzing Multiwell Communications
Sofya Sizova, Roman Korkin
Unconventional Resources Technology Conference (URTEC)
... by field engineers. As was mentioned in the previous section, Krauklis waves are highly dispersive, so harmonics of different frequencies ω propagate...
2021
Illuminating Resolution
Paul Wood
GEO ExPro Magazine
... in different ways. Pressure sensors (hydrophones) and velocity sensors (similar to land geophones) both record the seismic signal (upgoing wave...
2011
Study of the Seismic Attenuation Generated by the Mud Layer in Lake Maracaibo, Venezuela
J. Perez, E. Andara, B. Malave
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... attenuation of the compressional and shear waves. In theory, the gas content of the sediment reduces the compressional wave velocity by an order...
2006
Structural Analysis Using Spatial Filtering in Interior Plains of South-Central Alberta
J. E. Robinson , H. A. K. Charlesworth , M. J. Ellis
AAPG Bulletin
... be represented by the sum of a series of sinusoid surfaces of various frequencies, amplitudes, phases, and orientations--the larger undulations...
1969
Finite Difference Modeling: Part II: How to clean numeric time dispersion
Lasse Amundsen, Ørjan Pedersen, Martin Landrø
GEO ExPro Magazine
... of oscillations that travel at different speeds. Mathematically, it can be shown that when the physical velocity is constant equal to c, then the numerical...
2018
Practical Use of Borehole Seismic in Exploration; Goals and Shortcomings
F. Sandnes, L. Nustt, S. G. Henry
Indonesian Petroleum Association
... allows detailed analysis of the different wavetrains that are recorded. A velocity geophone anchored to the borehole wall receives information coming...
1983
Pore-Pressure Prediction in the Permian Basin Using Seismic Prestack Inversion
Colin Sayers, Lennert den Boer
Unconventional Resources Technology Conference (URTEC)
... (Terzaghi, 1943) that whereas compressive overburden stress compacts a rock, increasing the velocity of elastic waves propagating through...
2019
Direct Reservoir Imaging: The Need for Innovative Advancement in Exploration and Production, #41510 (2014).
Sofia Khan
Search and Discovery.com
..., the sum and difference frequencies of the two primary waves are created • Another seismic wave is created which is identified as the Slow Wave...
2014
Full phase-velocity spectrum inversion of multimode Rayleigh waves
Yanlong Niu, Yunyue Elita Li, Siau Chen Chian
International Meeting for Applied Geoscience and Energy (IMAGE)
...Full phase-velocity spectrum inversion of multimode Rayleigh waves Yanlong Niu, Yunyue Elita Li, Siau Chen Chian Full phase velocity spectrum...
2022
G. Non-Normal Incidence Reflections and the Determination of Lithology - Use of Shear Waves and Amplitude with Offset
Norman S. Neidell
AAPG Special Volumes
... to be different: [EQUATION] is the density; and µ are Lame's parameters As the compressional (P) waves passes through, the medium undergoes volume...
1987
Abstract: Adaptive f-xy Hankel Matrix Rank Reduction Filter to Attenuate Coherent Noise; #90174 (2014)
Nirupama (Pam) Nagarajappa
Search and Discovery.com
... of offsets which renders the signal underneath un-useable. In addition, the noise can be aliased and have variable properties in terms of velocity, strength...
2014
Abstract: Point Receiver Acquisition and Processing for Arctic Near Surface Challenges; #90171 (2013)
C. Strobbia, A.Glushchenko, A. Laake, P.L.Vermeer, S. Papworth, and Y. Ji
Search and Discovery.com
... large magnitude statics. The ice cover on frozen lakes may generate flexural waves, with large amplitude and very short wavelength. To evaluate...
2013
Non-Seismic Detection of Hydrocarbons: An Overview, #41697 (2015).
Dietmar (Deet) Schumacher
Search and Discovery.com
... are at specific frequencies which are harmonics and subharmonics of 60 or 50 cycles, depending on the local power grid. The waves propagate as plane waves...
2015
Geological Impact of Sediment Transporting Events on the Washington Continental Shelf
Nancy B. Kachel, J. Dungan Smith
CSPG Special Publications
... for sediment [= -log2 (diameter in mm)] φ latitude Ω angular velocity of Earth (7.29 × 10-5/s) ω angular velocity of waves (2π/T) Introduction...
1986
Computation of phase velocity direction using normalized wavefields
Kwangjin Yoon, Jungkyun Hyun
International Meeting for Applied Geoscience and Energy (IMAGE)
... Wave propagation direction is a useful information to perform seismic imaging and amplitude versus reflection angle study. Group velocity direction...
2024
Shallow shear wave velocity estimation through the ground stiffness and viscosity
Zhouhong Wei, Rong Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
... and viscosity as well as the estimation of the shallow shear wave velocity. First, the theoretical vibrator-ground model is studied. Then, different testing...
2024
Velocity Logging and Its Geological and Geophysical Applications
H. R. Breck, S. W. Schoellhorn, R. B. Baum
AAPG Bulletin
...: The next group of five illustrations is presented to demonstrate the good correlative characteristics of the velocity log. Figure 9 shows velocity logs...
1957
Broadband Seismic Technology and Beyond: Part II: Exorcizing Seismic Ghosts
Lasse Amundsen, Martin Landrø
GEO ExPro Magazine
... at particular frequencies. The notch frequencies depend on the respective depths of the source and receiver. For example, a depth of 6m produces a notch at 0...
2013
Abstract: Attenuation, Velocity Dispersion and the Fate of the Vibroseis Signal; #90211 (2015)
Bernd Milkereit, Flora Sun, Wei Qian, and Thomas Bohlen
Search and Discovery.com
... models, enhanced attenuation occurs across a restricted range of seismic frequencies (Debey peaks). The sum of a large number of Debey peaks may produce...
2015
Wave Climate and Littoral Sediment Transport, Northeast Gulf of Alaska
Dag Nummedal, Michael F. Stephen
Journal of Sedimentary Research (SEPM)
... of propagation of this energy (the group velocity). For deep water wave conditions, this becomes: Po = 9.58 · 102 · H2 · T (1) where all parameters are in mks...
1978
Quantitative analysis of DAS recorded P-wave generated by perforation shots
Peiyao Li, Ge Jin
International Meeting for Applied Geoscience and Energy (IMAGE)
..., masked P-wave. As normally adopted in the Multichannel Analysis of Surface Waves (MASW) method, the phase velocity analysis scheme is described...
2022