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The AAPG/Datapages Combined Publications Database
Showing 20,600 Results. Searched 200,293 documents.
Sonic Saturation Inversion and AVO Modeling in the Tunu Gas Field
Patrick Fouchard, Scott Leaney, Sugimin Harsono
Indonesian Petroleum Association
... the appropriate fluid and matrix densities in equation 3. Clay is included in the matrix density as: The shear velocity is affected by the pore...
1996
Abstracts: A Decomposition of RP into Contributions from single-parameter Reflectivities; #90173 (2015)
Kristopher A. Innanen
Search and Discovery.com
... obtain (10) , which is equivalent to equation (3) evaluated for the 2-parameter, density/velocity case...
2015
Abstract: Regular Grids Travel Time Calculation Fast Marching with an Adaptive Stencils Approach; #90187 (2014)
Zhengsheng Yao, Mike Galbraith, and Randy Kolesar
Search and Discovery.com
... the diagonal direction, we find that, if we put the local wavefront coordinate coincident with the diagonal, then equation (2a) is equivalent to ray tracing...
2014
Abstract: Estimation of the Quality Factor with Tomography Using the Complex Eikonal Equation; #90255 (2017)
Tatiana Espinosa, Carlos Piedrahita Escobar
Search and Discovery.com
... or fractured media. To achieve an estimate of Q, initially, a complex eikonal equation is solved in a viscoelastic medium using ray tracing...
2017
High-fidelity full-waveform imaging via impedance inversion
Feng Chen, Yu Zhang, Lian Duan, Weishan Han, Yilong Qin, Qianggong Song
International Meeting for Applied Geoscience and Energy (IMAGE)
... designed a simple experiment. We have a linear increasing velocity over the depth to provide us with the turning waves. We also have a density model...
2023
Chapter Ten-part 2: Depth Conversion
Leslie R. Denham, Dave K. Agarwal
AAPG Special Volumes
... to depth directly. Some corrections are usually needed: a correction for a near-surface low velocity layer at the source; corrections of source elevation...
2011
Developing a Versatile Method for Rock Physics Modeling in a Carbonate Reservoir by Integrating Rock Mechanic Laboratory Results, Petrophysical Analysis and Computational Rock Physics: A Case Study from The Kais Formation in the Salawati Basin
Al Hafeez, Ananto Wibisono, Rochmad, Khairil Iqbal, Agus Guntoro, Gianita Octavia
Indonesian Petroleum Association
... diagenesis. METHODS By assuming a linear (non linear for limestone) relationship between P- wave velocity (or S-wave) and porosity (as displayed...
2016
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
Well Log Prediction Using Machine Learning
Sundeep Sharma
Oklahoma City Geological Society
... equation, Vp = 357ρ4 Where Vp is the compressional velocity in ft/s and ρ is the bulk density in g/cc. We can substitute Vp for 106/DT(μs/ft...
2021
Application of Seismography to Geological Problems
Eugene McDermott
AAPG Bulletin
... expressed simply: [EQUATION] where V is the velocity, E is the appropriate coefficient of elasticity, and D is the density. In non-rigid media...
1931
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
... is that the relationship between velocity (1/slowness) and porosity is a linear relationship or fixed against varying rock quality. In the other hand, Prasad (2003...
2022
Seismic Anisotropy Modeling from Well Log in Talang Akar Formation, South Sumatra, Indonesia; #41360 (2014)
Thariq Guntoro, Intan Andriani Putri1, and Dwa Desa Warnana
Search and Discovery.com
... clay volume was extracted from a gamma ray log. By using the AVO equation using anisotropic parameters, the anisotropic seismic model can be determined...
2014
Abstract: Full Waveform Inversion with Phase Encoded Deconvolution Imaging Condition; #90224 (2015)
Wenyong Pan, Kris Innanen, and Gary Margrave
Search and Discovery.com
... of 30Hz. The ray parameter range used for linear phase encoding method is [-0.3s/km, 0.3s/km] with a step of 0.1s/km are tested for comparison. The lowest...
2015
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: Subsalt Velocity Estimation Using Wave-Equation Tomography with Surface Offset Gathers; #90319 (2018)
Yujin Liu, Yan Wu, Xiongwen Wang, Tong W. Fei, Yi Luo
Search and Discovery.com
... by ray tracing methods and wave equation (WE) tomographic operators. In subsalt areas, ray tracing cannot handle the large velocity contrast between salt...
2018
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
High-End Model Building Techniques for Revealing a Pre-Carbonate Reservoir Offshore East Natuna Basin, Indonesia
Jun Wang, Yonghe Guo, Yitao Chen, Muhammad Nauvall Juliansyah, Nick Crabtree
Indonesian Petroleum Association
... difficulties for conventional raybased reflection travel-time tomography. Figure 3 - Initial velocity and refraction energy penetration analysis (Depth...
2023
Stabilizing two-term clock-drift inversion in ocean-bottom node processing
Beng Seong Ong, Zhaojun Liu, Carsten Udengaard
International Meeting for Applied Geoscience and Energy (IMAGE)
... for ocean-bottom nodes is usually modeled by two terms, a linear and a quadratic term. A global approach to invert for water velocity, node positions...
2024
Seismic Imaging in Anisotropic Media. or... "A Better Way to Moveout and Migrate Long Offset Data"
Rolf Klotz, Martin Bayly, Sue Downie, Swee Leng
Indonesian Petroleum Association
.... A ray passing through a typical sequence of layers that increase in velocity with depth covers more horizontal distance in the deeper layers than...
2000
Rock Physics Diagnostics as a Prerequisite for Optimal Petrophysics
Akash Mathur, Hilfan Khairy
Indonesian Petroleum Association
... porosity from velocity for majority of the depth intervals here. We observed that even though Wyllietime-average equation could be matched to true density...
2021
Abstracts: General Anisotropic Travel Times A Purpose Built Solution; #90173 (2015)
R. Phillip Bording
Search and Discovery.com
... to travel times. Introduction The eikonal equation is a non-linear partial differential equation, which has many applications in geophysical modeling...
2015
Seismic Anisotropy Modelling and Fluid Substitution for Carbon Dioxide (Co2) Well Storage Project In Carbonate Reservoir
Pebrian Tunggal Prakosa, Thariq Guntoro, Ahmat Dafit Hasim, Okok Wijaya, Yulia Putri Wulandari
Indonesian Petroleum Association
... between P-wave and S-wave velocity, which can be written: (eq.4) This empirical relationship became known as the mud rock equation or the “ARCO mud...
2014
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
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
Utilizing Full Waveform Inversion to Improve Reservoir Imaging and Inversion in East Breaks, Gulf of Mexico
Search and Discovery.com
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