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The AAPG/Datapages Combined Publications Database
Showing 20,604 Results. Searched 200,357 documents.
Seismic Migration: Part 7. Geophysical Methods
Ken Larner, David Hale
AAPG Special Volumes
... that is homogeneous (constant P-wave velocity) with the exception of an isolated boulder at some depth. Also shown are the straight ray paths traveled...
1992
Abstract: Modelling Near-field Effects in VSP-based Q-estimation Part 1: Theoretical Developments; #90171 (2013)
Arnim B. Haase and Robert R. Stewart
Search and Discovery.com
... show a linear dependence on frequency in the far-field but not in depth regions where the near-field becomes significant. Near-field effects are one...
2013
Image - Rays and the Treatment of Inhomogeneity in Migration
L. Hatton
Southeast Asia Petroleum Exploration Society (SEAPEX)
... into depth. The only limiting factor is that very considerable uncertainty in velocity or reflector orientation may render the image-ray mapping stage...
1980
Geopressure Calculations in Real-time to Calibrate Operation Windows, #41931 (2016).
Carlos Martinez, Franklig Rodriguez, Edwin Hernandez, Edgar Gonzalez, Luis Corrales, Concepcion Isidro, Adrehny Leon
Search and Discovery.com
... of depth and geologic time: Geophysics, v. 16/2, p. 192-206. Faust. L.Y., 1953, A velocity function including lithologic variation:. Geophysics, v...
2016
ABSTRACT: Confirming Depth Models using Differential Wide Aperture Seismic; #90061 (2006)
James H. Leven
Search and Discovery.com
...-stack depth migration or for precise depth conversion, particularly for field definition. Normal moveout (NMO) “velocity” analysis is a relatively...
2006
Xu and White Revisited (Paper C8)
M. Sams, T. J. Focht, N. Azuairi Che Sidik
Geological Society of Malaysia (GSM)
... is replaced by the Hill average of the component minerals. The aspect ratio at each depth is adjusted until the modelled velocity matches the measured...
2012
Q-compensation imaging of anisotropic viscous quasi-acoustic media along wavefield propagation path
Bohan Zhang, Huazhong Wang
International Meeting for Applied Geoscience and Energy (IMAGE)
... in anisotropic absorption attenuation media are relatively cumbersome. In this paper, the 15-degree equation in the ray-centered coordinate system of VTI...
2022
Abstract: Near-Surface Velocity Estimation Using Source-Domain Full Traveltime Inversion and Waveform Inversion; #90319 (2018)
Lu Liu, Bowen Guo, Yi Luo
Search and Discovery.com
... tomography has been an efficient and robust tool to derive large-scale near-surface velocity models for decades (Zhang and Toksöz, 1998). Ray theory...
2018
Reservoir Description by Interferometric Imaging of VSP Data in Transition Zones
Thomas Radford, Martin Karrenbach, Ferry Yustiana, Willi Brianno, Dhea Wachju
Indonesian Petroleum Association
... aspects, we focused on the value of information obtained by using advanced processing flows, such as a 3D depth-tied velocity model construction using...
2013
Assessing properties of internal multiples for different geologies
Paul Ras, Mikhail Davydenko, Eric Verschuur
International Meeting for Applied Geoscience and Energy (IMAGE)
..., we introduce three challenging 1D earth models in Figure 1. Model 1 is relatively simple and derived from a seismic velocity model for a major gas...
2022
Velocity and Velocity
M. Al-Chalabi
Petroleum Exploration Society of Australia (PESA)
... Processing Assumption of uniform ground Pre-Stack & Model of ground 1------.. Depth Domain Processing structure/ velocity Fig. 7. The velocity cycle...
2000
Traveltime tomography and efficient physics-informed Bayesian inversion
Tian Qiao, George Turkiyah, Gerard T. Schuster
International Meeting for Applied Geoscience and Energy (IMAGE)
... by the 1D traveltime modeling equation listed under Figure 1a, where we assume an Nlayered medium with each layer having a thickness of ∆z, no ray...
2022
Abstract: Reverse Time Migration of Prestack Elastic Data; #90224 (2015)
R. Ferner and M. D. Sacchi
Search and Discovery.com
... equations, parallel and perpendicular to the boundary. The splitting procedure is delineated in equation 3 for the horizontal particle velocity component vx...
2015
Can Resistivity be Predicted from Elastic Properties?
Maman Hermana, Luluan A. Lubis, Cow Weng Sum, Deva P Ghosh, Kazuki Ishikura
Indonesian Petroleum Association
... resistivity (ohm-m), z is depth (km) and v is velocity (km/s). Faust equation correlates velocity with resistivity with nonlinear relation...
2017
Abstract: Pitfalls in Velocity Analysis Using Common-Offset Time Migration, by Y. C. Kim and J. R. Krebs; #90981 (1994).
Search and Discovery.com
1994
NMO Application in VTI Media: Effective and Intrinsic Eta (Geophysics Paper 6)
Joel Starr, Maz Farouki
Geological Society of Malaysia (GSM)
... and velocity in a CMP gather. NMO equations approximate the time shift which would be computed by tracing a ray through a horizontally layered Earth. A few...
2008
Reservoir Characterisation Study: Inter Well Reservoir Property Prediction and Mapping by Petrophysics Data and Seismic Data Integration
Robi Junipa, Michel Bee
Indonesian Petroleum Association
... seismograms as a guide. • Third, a velocity model is built. Comprehensive iterative velocity models were created based on the final time-depth...
2010
Pre-Stack Imaging: Time or Depth? (Paper 25)
Carl Notfors, Peter Whiting, Geoff Mansfield
Geological Society of Malaysia (GSM)
... they handle lateral velocity variations. The depth algorithm comprehends any lateral velocity variation whereas the time algorithm assumes local...
2000
Quantitative seismic interpretations to detect biogenic gas accumulations: a case study from Qaidam Basin, China
Yexin Liu, Zhuoheng Chen, Liqun Wang, Yongshu Zhang, Zhiqiang Liu, Yanhua Shuai
CSPG Bulletin
... coefficients (Hampson and Russell, 2013). The linear Conjugate Gradient (CG) method is one of the best methods to solve equation [2]. Ideally, thousands...
2015
Microseismic imaging with three-component borehole sensors
Jakob B. U. Haldorsen
International Meeting for Applied Geoscience and Energy (IMAGE)
... the vertical well. The second panel shows a horizontal section at the known depth of the sources, through the 3D ±2°"fat-ray" image cube at the depth...
2022
Specialized processing of a massive distributed acoustic sensing (DAS) 3D VSP in a producing well
Ali Sayed, Francesca Twynam, Ran Bachrach, Philippe Caprioli, Marcus Holloway, Qingsong Li, Reetam Biswas, Daniel Tebo, Sam Buist
International Meeting for Applied Geoscience and Energy (IMAGE)
...rain-rate along the fiber cable. The axial strain-rate can be converted to axial velocity by integration along the depth axis (equation 2a). This...
2023
3D Pore Pressure Prediction Model in Bentu Block Central Sumatra Basin
Wawan A. Behaki, Aldyth Sukapradja, Ronald C. Siregar, Radig Wisnu Y, Setiabudi Djaelani, Benny A. Sjafwan
Indonesian Petroleum Association
... will decrease with depth and so the sonic velocity will increase with depth. Conversely, if undercompaction (overpressure) exists, ITT will increase and sonic...
2012
3D Pore Pressure Prediction Model in Bentu Block Central Sumatra Basin; #41105 (2012)
Wawan A. Behaki, Aldyth Sukapradja, Ronald C. Siregar, Radig Wisnu Y, Setiabundi Djaelani, and Benny A. Sjafwan
Search and Discovery.com
... decreases and density increases, and the rock becomes a much more efficient sonic conductor. The ITT will decrease with depth and so the sonic velocity...
2012
Permeability and acoustic velocity controlling factors determined from x-ray tomography images of carbonate rocks
Nathaly L. Archilha, Roseane M. Missagia, Cathy Hollis, Marco A. R. de Ceia, Samuel A. McDonald, Irineu A. Lima Neto, David S. Eastwood, and Peter Lee
AAPG Bulletin
...Permeability and acoustic velocity controlling factors determined from x-ray tomography images of carbonate rocks Nathaly L. Archilha, Roseane M...
2016
Unlocking the Potential of Conventional Narrow Azimuth Data by Full-Waveform Inversion: a Deep Carbonate Imaging Case Study, Offshore Indonesia
Jun Wang, Yonghe Guo, Putri Supriandini, Bahrul Yusrie, Natalia Anggriani
Indonesian Petroleum Association
... sensible velocity updates down to 3.5 kilometers. These updates to the model improve the seismic image and, importantly, reduce the depth...
2021