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The AAPG/Datapages Combined Publications Database
Showing 20,604 Results. Searched 200,357 documents.
Wide-angle AVO-inversion using constant P-traces: AVP-inversion
Dennis Cooke
International Meeting for Applied Geoscience and Energy (IMAGE)
... inversion over narrow-angle inversion by using singular value decomposition of the AVA linear operator G in equation (1): 𝑮 𝒎 = 𝒅 𝜽 …………………………………(1...
2022
Diving wave tomography: Velocity modelling using first arrival traveltime
Amatul Syafi Abdul Basit, Abdul Rahim Md Arshad, Arulini Permalu
Geological Society of Malaysia (GSM)
... in the North Sea (Virieux & Operto, 2009). The linear relationship of velocity with distance travelled by seismic wave (ref. Equation 1) implied a constant...
2022
An Interpreter's Guide to Improvements in Depth Imaging through Model-Based Velocity Estimation and Refinement
Andy Furniss
Petroleum Exploration Society of Australia (PESA)
... predictions in the depth domain, from simply improving our initial velocity models using model-based ray-tracing techniques through to the ultimate...
1999
AAPG Memoir 76, Chapter 15: Forward Modeling of Log Response in Geopressured Formations Reveals Valuable Insights to the Various Pore-Pressure Prediction Techniques
J. C. Rasmus
AAPG Special Volumes
... of resistivity, density, gamma ray, and neutron log vs. depth Figure 1. Forward-modeled resistivity vs. depth for various pore-pressure equivalent...
2001
Uncertainty Analysis for Top Tuban Carbonate Prediction using Velocity Modeling Design in "Aquila" Field, East Java Basin
Ayu Indri Firdani, Azhar Kholiq Affandi, Erik Wahyu Irawan, Kamal, M. Wahdanadi Haidar, M. Freddy Yulisasongko
Indonesian Petroleum Association
... the uncertainty of the Tuban Carbonate depth marker due to high velocity anomalies from the results of the conversion using the linear trend velocities...
2015
Slide Rule Seismic Computations
Robert H. Mansfield
Oklahoma City Geological Society
... a wide range of possible velocity functions. The circular ray path obtained by using a linear increase of velocity with depth provides a rather accurate...
1958
Volume-constrain first arrival tomography based near surface modeling and its application
Naijian Wang, Zhihui Yan, Qingpo Ma, Wei Wu, Yunfei Zu, Yonggui Hu
International Meeting for Applied Geoscience and Energy (IMAGE)
... processing in time domain, the static corrections calculated with depth-velocity curve or refraction method could usually achieve good results. By converting...
2022
A depth uncertainty estimation method using interval-domain anisotropic VTI velocity and travel time detectability criterion
Andrey H. Shabelansky, Cory J. Hoelting, Min Yang, Sizhuang Deng, Jinsong Chen
International Meeting for Applied Geoscience and Energy (IMAGE)
... ) and zlow (x, y, zref ) are obtained respectively from equations 8b and 8c by linear conversion from time to the reference depth. Equation 9 is one...
2024
Prediction and Analysis of Geomechanical Properties of the Upper Bakken Shale Using Artificial Intelligence and Data Mining
George K. Parapuram, Mehdi Mokhtari, Jalel Ben Hmida
Unconventional Resources Technology Conference (URTEC)
... as the input and shear wave velocity as the output. Initially, the conventional well logs used were Depth, Gamma Ray (GR), and Bulk Density (RHOB...
2017
The SDP Dip Plotter
W. S. Hawes
Oklahoma City Geological Society
... of velocity with depth is present. Figure 2 shows the form for the classical case of linear increase of velocity with depth. This, of course, is the type...
1958
Joint velocity and event location inversion workflow in microseismic reservoir monitoring
Takashi Mizuno, Joel Le Calvez, Manish Lal Khaitan, Giulia Barisione, Irina-Tulia Stoia, Prakash Ranjan, Stefano Clerico, Xinyuan Li, Zheyuan Huang
International Meeting for Applied Geoscience and Energy (IMAGE)
... with different wavelengths. Using the Fourier transform for the velocity along with the depth, equation (1) can be written in the following form: Figure 2...
2022
Broadband Least-Squares Wave-Equation Migration
Shaoping Lu, Andrew Long, Alejandro Valenciano, Nizar Chemingui
Petroleum Exploration Society of Australia (PESA)
...), and the earth properties at the reflector depth and the overburden (velocity, attenuation). Some of these conditions can be mitigated during acquisition...
2018
Wave-Equation-Based Target-Oriented Inversion for Reservoir Characterisation, #41759 (2016).
Dries Gisolf, P.R. Haffinger, P. Doulgeris
Search and Discovery.com
... and primary reflections only, is linear modelling. • Wave-equation based modelling, with propagation in the full medium, transmission effects, multiple...
2016
Research of high-precision depth interpretation method for low-amplitude offshore reservoir and its application in C oilfield, Bohai Bay Basin
Wenbin Li, Jianli Wang, Zhenglong Zhang, Heng Zhang
International Meeting for Applied Geoscience and Energy (IMAGE)
... to fast lateral velocity change, poor quality of seismic velocity, time-depth conversion only based on velocity interpolation of several existing...
2022
Combined Diving Wave Refraction Tomography and Reflection Tomography for PSDM Velocity Model Building (Bekapai Field, Indonesia)
Andi Kusuma, Florent Bertini, Jacques Bonnafe, Artem Sazykin, Swee Leng Ng
Indonesian Petroleum Association
... of arrival times from shot to receivers via ray tracing, to build linear equations 4. Solving a linear system of equations for velocity update from...
2011
Influence of Geological Factors on Longitudinal Seismic Velocities
B. B. Weatherby , L. Y. Faust
AAPG Bulletin
... of calcareous sandstones and shales is substantially higher than that of a normal sand-shale section. The effect of depth on the velocity of a given...
1935
Seismic Foldout: The Most Advanced Datasets Offshore Barbados and T&T
Jeniffer Masi, Jeroen Hoogeveen, Nick Tanushev, John Walker, Alexander Mihai Popovici, Geoex MCG, Z-Terra
GEO ExPro Magazine
... using the velocity to obtain a velocity correction along the ray trajectory. This correction is the residual for the tomographic equation...
2022
Abstract: Velocity Model Building with Weighted Linearized Inversion A VSP Data Case Study; #90187 (2014)
Mingyu Zhang, Richard Kuzmiski, and Zhengsheng Yao
Search and Discovery.com
... and velocity model is not linear while equation (1) is a linearized inversion. The initial model is a 1D velocity model that is inverted by near offset...
2014
An Interpreter's Guide to Improvements in Depth Imaging Through Model-Based Velocity Estimation and Refinement
Andy Furniss
Indonesian Petroleum Association
... incorrect results as ray bending still occurs due to velocity variations within layers and at layer boundaries. The Dix equation itself is based on several...
2000
Fast and efficient structure-oriented preconditioning with on-the-fly dip estimation
Rodrigo Felicio Fuck, Lorenzo Casasanta
International Meeting for Applied Geoscience and Energy (IMAGE)
... for the guided filter linear operator, Lg. Indeed, starting from line 8 of Algorithm 1, one may write We further simplify equation 4 by realizing...
2023
Time-Lapse Refraction Seismic I: A Complementary Monitoring Method?
Martin Landrø, Lasse Amundsen
GEO ExPro Magazine
... diving waves in a medium where the velocity increases linearly with depth. energy is sent back to the surface at the critical V0 = 2,000 m/s and two...
2017
Analytical Method to Accurately Estimate Overpressure Magnitude: The Case Study from Indonesia's Tertiary Basins
Agus M. Ramdhan, Lambok M. Hutasoit, Arifin
Indonesian Petroleum Association
... be then calculated using Terzaghi’s equation. Density log in Figure 3 starts to respond to the presence of overpressure at depth ‘a’ down to the TD...
2021
Improve Kirchhoff depth imaging using full-wave-equation traveltimes
Yongzhong Wang, Yang He, Alex Yeh, Faqi Liu, Bin Wang, Carlos Caldern
International Meeting for Applied Geoscience and Energy (IMAGE)
...-based traveltime Kirchhoff depth migration is superior to the conventional ray-based Kirchhoff depth migration in complex areas with large velocity...
2023
High-precision seismic imaging for complex deep structures in the hydrocarbon exploration using a coherent-stacking-based least-squares migration
Jidong Yang, Jianping Huang, Tengfei Lin, Zhenchun Li, and Liang Chen
AAPG Bulletin
... of seismic waves at great depth, the constraint for deep and ultradeep velocity is not good in traditional ray-based tomography. Two strategies can...
2024
Petrophysical Relationship to Predict Synthetic Porosity Log; #41124 (2013)
Thariq Guntoro, Intan Putri, and Ayi Syaeful Bahri
Search and Discovery.com
... was estimated by Faust’s equation, a better result was obtained at a depth of 4,300 - 5,479 ft compared with the measured P-wave velocity. A good result...
2013