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The AAPG/Datapages Combined Publications Database
Showing 2,819 Results. Searched 200,357 documents.
MFF net: A multiscale feature fusion network for electromagnetic and seismic joint inversion
Yonghao Wang, Zhuo Jia, Yinshuo Li, Wenkai Lu
International Meeting for Applied Geoscience and Energy (IMAGE)
... gradient method for EM data. Figure 3 displays the results of different inversion methods. Our results indicate that the network inversion method, Third...
2023
3-D Tomographic Amplitude Inversion for Compensating Transmission Losses in the Overburden
Barry Hung, Kefeng Xin, Sergey Birdus, James Sun
Indonesian Petroleum Association
... such as least-squares conjugate gradient method. The resulting βijk is then used to compensate for the attenuation occurred in the ijkth cell...
2009
Q-compensated least-squares reverse time migration by considering velocity and Q perturbations
Jinli Li, Yingming Qu, Chongpeng Huang, Zhenchun Li
International Meeting for Applied Geoscience and Energy (IMAGE)
... gradient method to update the parameters. We use a second-order viscoacoustic wave equation, described by (Qu et al., 2019) m ~ where G denotes...
2022
Q-LSRTM using viscoacoustic VTI wave equation based on the nearly constant Q model
Zhang Shan-Shan, Gu Bing-Luo, Li Zhen-Chun
International Meeting for Applied Geoscience and Energy (IMAGE)
... are obtained by numerical simulation of equation (3) and are used for migration. In the Q-VTILSRTM process, the nonlinear conjugate gradient method is used...
2022
A Generalized Inverse Method for Testing Depth-Dependent Extension Models at Highly Extended Continental Margins, #30210 (2011)
Alistair Crosby, Nicky White, Glyn Edwards, Mark Thompson, Richard Corfield, Laura Mackay
Search and Discovery.com
...A Generalized Inverse Method for Testing Depth-Dependent Extension Models at Highly Extended Continental Margins, #30210 (2011) Alistair Crosby...
2011
PS reflection-based full-waveform inversion using single-mode propagator
Yongbo Zhai, James Xu, James Rickett, Peng Wang, Xin Cheng, Denes Vigh, Suyang Chen, Cara Smith
International Meeting for Applied Geoscience and Energy (IMAGE)
.... Synthetic and field data examples demonstrate that our proposed method effectively addresses the gap in S-wave velocity model building (VMB...
2024
Kinematic Analysis of Range-Front Thrust Faulting Near Anaktuvuk Pass, North-Central Brooks Range, Alaska
Hans G. Ave Lallemant, John S. Kelley, James C. Phelps
Pacific Section SEPM
... of the striations, although the method is not entirely reliable (Hobbs et al., 1976). Conjugate sets of faults are used for dynamic analysis...
1987
Applications of Kirchhoff Least-Squares Migration: Towards Reservoir Imaging; #42183 (2018)
Francesco Perrone, Graham Roberts, Lorenzo Casasanta, Andrew Ratcliffe, Arash Jafargandomi, Karen Purcell
Search and Discovery.com
..., the migration inverse problem is more commonly solved using an iterative, gradient-based, approach. Unfortunately, the iterative nature of this method makes...
2018
Detection of deep geological targets in complex areas using two-side source TFEM
Yanling Shi, Xuejun Liu, Jian Song, Jingcheng Qin, Gang Yu, Zhanxiang He
International Meeting for Applied Geoscience and Energy (IMAGE)
..., and there is an urgent need to adopt new geophysical method. Time-frequency electromagnetic exploration (TFEM) is an effective method for oil and gas trap prediction...
2024
Abstract: Optimum Aperture Length for Improving Dispersion Curve Analysis in CMP Cross-Correlation of Surface Waves; #90187 (2014)
Roohollah Askari, Robert J. Ferguson, and Helen Isaac
Search and Discovery.com
... is the calculated phase velocity. Using the above equation, we try to optimize a model using the method of Conjugate Gradient (Zeidouni, 2011). We calculate...
2014
Obtaining Low Frequencies for Full Waveform Inversion by Using Augmented Physics
Eldad Haber, Eran Treister, Elliot Holtham
Petroleum Exploration Society of Australia (PESA)
... of methods are typically used. First order methods such as nonlinear conjugate gradient and limited memory BFGS (Nocedal and Wright, 1999) have...
2016
Large-scale 3D Inversion of Helicopter Electromagnetic Surveys for Oil Sands Exploration near Fort McMurray, Alberta, Canada; #41303 (2014)
Leif H. Cox, Glenn A. Wilson, Michael S. Zhdanov, Jonathan Rudd, and John Wilson
Search and Discovery.com
... and sensitivities, and are convolved with the transmitter waveform (Raiche, 1998). We use a regularized conjugate gradient method for minimizing the Tikhonov...
2014
Recent advances on the inversion of deep directional borehole resistivity measurements
Vladimir Puzyrev, David Pardo, Víctor Calo, Carlos Torres-Verdín
Petroleum Exploration Society of Australia (PESA)
... the nonlinear conjugate gradient (NLCG) method preconditioned by the depth rescaling (Puzyrev et al., 2018). Its accuracy is further improved by using the Wolfe...
2019
Low-rank representation for reflectivity model and its applications in least-squares migration
Jidong Yang, Jianping Huang, Hejun Zhu, George McMechan
International Meeting for Applied Geoscience and Energy (IMAGE)
... as m1 = arg min m 2 , (6) which can be computed by using the preconditioned conjugate gradient method. With the solution of m1 , the second step...
2024
Solving seismic inverse problems by an unsupervised hybrid machine-learning approach
Mrinal K. Sen, Arnab Dhara
International Meeting for Applied Geoscience and Energy (IMAGE)
... (gradient descent, Newton, conjugate gradient, ..), choice of a regularization operator and the regularization weight. Contrary to this, a typical...
2022
Large scale magnetic vector inversion using differential equations
John M. Weis, Lindsey J. Heagy
International Meeting for Applied Geoscience and Energy (IMAGE)
...eached. To minimize Equation 8 for each value of β , we apply a GaussNewton conjugate gradient (CG) method. This method solves for a descent direction itera...
2024
Seismic Imaging of the SW South China Sea Deep Crustal Structure Shows Evidence for a Ductile Lower Crust during Rifting; #30404 (2015)
M. Delescluse, T. Pichot, N. Chamot-Rooke, M. Pubellier, Y. Qiu, G. Sun, J. Wang, J.-L. Auxiètre
Search and Discovery.com
...-angle refraction profile has been acquired along the conjugate margins using a total of 50 Ocean Bottom Seismometers (OBS). A coincident multichannel...
2015
Inversion of magnetotellurics data with enhanced structural fidelity
Federico Golfré Andreasi, Simone Re, Federico Ceci, Luca Masnaghetti
Petroleum Exploration Society of Australia (PESA)
... METHOD We solve the inverse MT problem by minimizing a cost function through a preconditioned non-linear conjugate gradient technique, as described...
2019
Integrating 3-D seismic data, field analogs, and mechanical models in the analysis of segmented normal faults in the Wytch Farm oil field, southern England, United Kingdom
Simon A. Kattenhorn, David D. Pollard
AAPG Bulletin
... fault (situated in the footwall of the leading fault), which has a broader peak and steeper slip gradient toward its lower tip. Conjugate faults...
2001
Abstract: Interpolation by Angular Deconvolved prior MWNI (AdMWNI); #90224 (2015)
Mark Ng and Dan Negut
Search and Discovery.com
... the solution. As in conventional MWNI, the data fitting is achieved by the conjugate gradient (CG) method imposing sparsity in the transform model mkx...
2015
Abstract: Data Interpolation by Angular Weighted MWNI; #90187 (2014)
Mark Ng and Dan Negut
Search and Discovery.com
.... This provides a guide to the general impression of the dips. Then, apply the conjugate gradient (CG) method using the iteratively reweighted least-squares (IRLS...
2014
Operator chains and seismic data decomposition
Sergey Fomel
International Meeting for Applied Geoscience and Energy (IMAGE)
..., 2016, Accelerating extended least-squares migration with weighted conjugate gradient iteration: Geophysics, 81, no. 4, S165–S179, doi: https://doi.org...
2022
Abstract: 3D Time Domain Full Waveform Inversion Based on Multiscale Adapted Variable Grid Method Case Study Majunga Basin East African Coast; #91204 (2023)
Mukiibi Ssewannyaga Ivan, Jian-Ping Huang, Zi-Ying Wang, Jidong Yang, Jin Keji
Search and Discovery.com
... (Boonyasiriwat, et.al.,2009, Dessa, et.al., 2004). In this paper the nonlinear conjugate gradient method is used in the determination of the descent...
2023