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The AAPG/Datapages Combined Publications Database

Showing 4,599 Results. Searched 187,807 documents.

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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

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

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

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

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

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

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

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

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

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

Sonic Velocity in Carbonates„A Combined Product of Depositional Lithology and Diagenetic Alterations

Flavio S. Anselmetti, Gregor P. Eberli

Special Publications of SEPM

... caused by the different frequencies at which the two velocities are measured causes no significant velocity difference This good between the two...

2001

Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015)

Hassan Khaniani and John C. Bancroft

Search and Discovery.com

...Abstracts: Application of CSP Gather Modeling for Determination of Velocity Smoothing Operator for Prestack Kirchhoff Depth Migration; #90173 (2015...

2015

The 'Geoseis' System: Seismic Prospecting with Detonating Cord - A Line Energy Source

D. W. Thompson

Petroleum Exploration Society of Australia (PESA)

..., it generates seismic waves as depicted in Figure I. The seismic waves generated will travel from the surface at the seismic velocity Vs· At time = To when...

1985

SYNTHETIC SEISMOGRAMS

Search and Discovery.com

N/A

Near-Shore Ripples: Some Hydraulic Relationships

A. S. Trenhaile

Journal of Sedimentary Research (SEPM)

... the ripple reached the break point of the waves. Keeping the same wave characteristics, each experiment was repeated three times, using different...

1973

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