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The AAPG/Datapages Combined Publications Database
Showing 20,858 Results. Searched 200,621 documents.
Estimation of anisotropic parameters from semblance picking using dynamic programming
Hong Liang, Houzhu (James) Zhang, Dongliang Zhang, Hongwei Liu, Xu Ji
International Meeting for Applied Geoscience and Energy (IMAGE)
... the feasibility. The two-way traveltime in an isotropic medium is given by the following normal moveout equation: Introduction Anisotropy has become...
2022
The Impact of Pore Geometry and Microporosity on Velocity-Porosity Relationship in Carbonates of Central Luconia, Sarawak; #41030 (2012)
Nor Sara Izzatti Bashah and Bernard Pierson
Search and Discovery.com
... scattering along the Wyllie’s time average equation. The large scattering in most cases will result in large uncertainties in seismic inversion...
2012
Fluid and Petrophysical Prediction in the Elastic Impedance Domain Using Neural Network Technique; #41066 (2012)
M. Hermana, M. Najmi, Z.Z.T. Harith, and C.W. Sum
Search and Discovery.com
... subtends to the negative B axis. The equivalent expression for equation (3) as EEI is: (5) where α = P-wave velocity, ρ = density, β = S-wave velocity, p...
2012
Insights from Stratigraphic Modeling: Mud-Limited Versus Sand-Limited Depositional Systems
William C. Ross , Dale E. Watts , Jeffrey A. May
AAPG Bulletin
... (A) of sand that will be deposited in deep-water (below-wave-base) environments is given as Equation (12) The area of sand trapped in the topset...
1995
Imaging of Fractures and Faults inside Granite Basement Using Controlled Beam Migration (Geophysics Paper 5)
Don Pham, Jason Sun, James Sun, Qingbing Tang, Graeme Bone, Nguyen Truong Giang
Geological Society of Malaysia (GSM)
... migration algorithm, representing a high-frequency approximation to the acoustic wave equation. When multi-arrivals occur, it has to select one...
2008
Unfathomable: The shifting sand of wave base
Eugene C. Rankey, Christian M. Appendini
Journal of Sedimentary Research (SEPM)
...,” and suggested that it was controlled by the most energetic half day of waves annually; he also provided an equation based on wave height for its estimation Depth...
2022
Analysis of Time-lapse Multicomponent Seismic Data from a Potash Mining Area in Saskatchewan, Canada, #41275 (2014)
Andrew Nicol, Don Lawson
Search and Discovery.com
... within the Dawson Bay carbonates. Furthermore, interval velocity analysis shows an increase in Vp/Vs ratio indicating a decrease in shear wave...
2014
Critical Porosity in Understanding Acoustic Porosity Anomalies. A Case Study in Complex Carbonate Reservoir in Indonesia
Aditya Arie Wijaya, Sunawar Kunaifi, Krishna Pratama Laya, Luqman, Dimmas Ramadhan
Indonesian Petroleum Association
... increase. SONIC POROSITY ANOMALY The sonic porosity is calculated using P-wave data (slowness) and applying the Wyllie equation. The matrix slowness...
2022
High-resolution FWI of converted-wave data A case study from the Edvard Grieg field
Per Eivind Dhelie, Vidar Danielsen, Jon Andre Haugen, Emilie Davenne, Knut Richard Straith, Alireza Roodaki, Manuel Peiro, Alexis Fotsoh, Wenlei Gao, Nabil Masmoudi, Andrew Ratcliffe
International Meeting for Applied Geoscience and Energy (IMAGE)
... with PPPS event registration was performed prior to outputting the initial Vs model used to start the Vs FWI process. The elastic wave equation contains Vp...
2022
Theoretical and experimental study of acoustic and electrical properties in tight-oil rocks: A case study
Mengqiang Pang, Jing Ba
International Meeting for Applied Geoscience and Energy (IMAGE)
... of Yanchang Formation in the Q Area, Ordos Basin, China. Then, X-ray diffraction (XRD), casting thin sections (CTS), ultrasonic wave and electrical...
2022
Pore-Pressure Prediction in the Permian Basin Using Seismic Prestack Inversion
Colin Sayers, Lennert den Boer
Unconventional Resources Technology Conference (URTEC)
... it, the pressure exerted by fluid inside the rock opposes compaction, reducing the wave velocity. Measurable effects of stress change, including compaction...
2019
Abstract: Full Waveform Inversion of Crosswell Seismic Data Using Automatic Differentiation; #90187 (2014)
Danping Cao and Wenyuan Liao
Search and Discovery.com
...-fitting procedure based on the seismic waveform data to estimate the model parameters, which usually appear as coefficients in a wave equation. The most...
2014
Analysis of the influence of bedding-parallel cracks on shale anisotropy based on stress-induced rock physics model
Ying Xu, Feng Zhang, Guohua Niu, Xiangyang Li
International Meeting for Applied Geoscience and Energy (IMAGE)
... laboratory measurements found that the shales of the K2qn1 exhibit extremely strong seismic anisotropy, and the mean value of S-wave anisotropy...
2024
Rock Physics Modeling in Unconventionals: A Midland Basin Case Study
Paritosh Bhatnagar, Venkatesh Anantharamu, Ron Bianco
Unconventional Resources Technology Conference (URTEC)
..., porosity, fluids, pore shape and effective stress, the model can be successfully used for predicting P- and S- wave velocity as a function of total...
2024
Abstract: Fracture Detection Via Azimuthal Analysis of Seismic Data: Snake Oil or silver Bullet?; #90187 (2014)
Mike Perz, Peter Cary, Xinxiang Li, and Satinder Chopra
Search and Discovery.com
... azimuthal fracture detection techniques: P wave azimuthal velocity analysis (VVAZ), P wave azimuthal AVO analysis (AVAZ), and converted wave shear wave...
2014
Seismic Anisotropy VTI Modeling and Mechanical Properties of Kerogen in Gas Shale, #42486 (2020).
Anggoro S. Dradjat, Agus Djamil, M. Firwan Aprizal
Search and Discovery.com
... modulus Young. Seismic amplitude response of layering shale can be quantified through physical process using seismic P and S wave velocity measurement...
2020
Sediment transport on the shelf margin of the Grand Banks of Newfoundland
J. V. Barrie, M. B. Collins
Atlantic Geology
... density (ps) into this equation, the thresh old velocity (Um for sediment motion is computed as a function. ) of wave period. For a specific water depth...
1989
Automation of passive seismic processing via machine learning and physics-informed methods
Ivan Lim Chen Ning, Laura Swafford, Mike Craven, Kevin Davies, Evan Earnest, Dean Thornton
International Meeting for Applied Geoscience and Energy (IMAGE)
... on all available seismic sensors. A machine learning workflow can ingest raw passive seismic data from multiple seismic sensors to identify P and S wave...
2022
Poro-acoustoelasticity FD simulation of elastic wave propagation in prestressed porous media
Haidi Yang, Li-yun Fu
International Meeting for Applied Geoscience and Energy (IMAGE)
...Poro-acoustoelasticity FD simulation of elastic wave propagation in prestressed porous media Haidi Yang, Li-yun Fu Poro-acoustoelasticity FD...
2022
Defining a Steeply-Dipping Salt Flank in Mississippi with a New High-Certainty 3D Method
Nicholas Brooks, Pat Donais, Werner Heigl, Jakob Haldorsen, Fred Li
GCAGS Transactions
... use the wave equation to forward propagate the source wave field through a model of the shallow sediments and salt body (Claerbout, 1985...
2015
Fast Gauss-Newton full-wavefield migration
Siamak Abolhassani, Eric Verschuur
International Meeting for Applied Geoscience and Energy (IMAGE)
...* and Eric Verschuur, Delft University of Technology SUMMARY Since the appearance of wave-equation migration, many have tried to push this technology...
2022
Abstract: Azimuthal Fourier Coefficient Elastic Inversion; #90174 (2014)
Benjamin Roure and Jon Downton
Search and Discovery.com
... such as the near offset Rüger equation or other reflectivity approaches and these comparisons are illustrated on real dataset. The azimuthal elastic inversion...
2014
Improving total organic carbon estimation for unconventional shale reservoirs using Shapley value regression and deep machine learning methods
Jaewook Lee, David E. Lumley, and Un Young Lim
AAPG Bulletin
... correlated with the TOC logs, such as bulk density, P-wave velocity, and Poisson’s ratio. Second, we derive a multivariate linear regression model...
2022
Abstract: Separation of Geometric Spreading, Scattering and Intrinsic Attenuation in VSP data; #90187 (2014)
Amin Baharvand Ahmadi and Igor Morozov
Search and Discovery.com
... to 1160 m, scattering dominates the attenuation. Introduction Attenuation of seismic-wave amplitudes is a complex phenomenon which is important...
2014
Relationship Between Grain Size Parameter Distribution and Current Patterns in the Gironde Estuary (France)
George P. Allen
Journal of Sedimentary Research (SEPM)
.... (March), The bottom sediments in the marine portion of the Gironde estuary have been extensively sampled and studied in relationship to the local wave...
1971