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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,599 documents.
Unlocking the potential of WAZ data for subsalt imaging using FWI: A case study in the Perdido area
Vivek Vandrasi, Zhihua Su, Shouting Huang, Yogesh Agnihotri, Sabaresan Mothi
International Meeting for Applied Geoscience and Energy (IMAGE)
..., which applies least-squares fitting to the recorded full-wavefield data to generate an image along with a velocity model, can take advantage...
2022
New Technology to Identify and Characterize Natural Fractures
W. W. Weiss, Abdel Zellou
Four Corners Geological Society
... producing rate. For example, the northwest-southeast curvature information was used to construct a linear least squares fit to model the data. Four...
1999
Solving seismic inverse problems by an unsupervised hybrid machine-learning approach
Mrinal K. Sen, Arnab Dhara
International Meeting for Applied Geoscience and Energy (IMAGE)
... and the output of the DNN is an estimated model which is updated by back propagation. For example, for a linear problem, the damped least squares...
2022
New Imaging Results and Improved Interpretation of Late Triassic Depositional Features within the Browse Basin, North West Shelf of Australia
Jarrad Paul Grahame, Tran Thinh To
Australian Petroleum Production & Exploration Association (APPEA) Journal
..., carbonate play, Late Triassic, least-squares Q Kirchhoff pre-stack depth migration, Maxima 3D, North West Shelf, Scott Reef, time-lag full waveform...
2022
2012 Update of Southern Mid-Continent Theses and Dissertations
Neil H. Suneson
Oklahoma City Geological Society
..., Noise suppression using preconditioned least-squares prestack time migration and imaging of Mississippian Limestone. MS. Yalcin, Bora, 2012, Tectonic...
2012
UK Continental Shelf: An Evolution in 3D Seismic Imaging of the Central North Sea
Matthew Dack, Gregor Duval, CGG
GEO ExPro Magazine
... deconvolution, has dramatically improved the signal at depth. This, combined with Least-Squares Kirchhoff migration, which has further enhanced the deeper...
2021
Finding By-Passed Oil Using the Reservoir Saturation Tool in Lirik, South Sumatra
Bambang Djoko, Nuke Nugraha, Cholid Mas, Yan Sudarmo
Indonesian Petroleum Association
.... The relative contribution of each element - or the elemental yield can be determined by weighted least squares spectral fitting. The process...
1993
Delineating buried metallic pipes using borehole magnetic data in civil engineering
Hyoungrea Rim, Mengli Zhang, Yaoguo Li
International Meeting for Applied Geoscience and Energy (IMAGE)
... it as the forward modeling. The parametric nonlinear inversion for pipe parameters is achieved by a standard nonlinear least squares fitting of the total-field...
2023
High-frequency FWI on Clair OBN dataset Challenges and successes
Matvey Romanenko, Lee Saxton, Dan Davies, James Sheng, Faqi Liu, Jan Gromotka, Yang He
International Meeting for Applied Geoscience and Energy (IMAGE)
...). It has better resolution and signal to noise ratio and reveals more detail in the reservoir section. The least squares nature of this image also leads...
2023
Estimation of Uncertainty in Coal Resources (1)
D. Mathew, M. P. Roberts
GCAGS Transactions
... for the lower half (zone 1) of seam no. 6 (fitted variogram: least squares method). Figure 5. Fitted and experimental variogram for the upper half...
1981
Computer Contouring Packages: An Historical View
R. Bugry
CSPG Bulletin
... an inverse-distance-weighted least-squares fit of the nearest data points around the current centroid. The calculation is performed for all grid nodes...
1981
Elastic reverse time migration with more than pressure data
Denes Vigh, James Xu, Xin Cheng, Zongcai Feng, Bing Bai
International Meeting for Applied Geoscience and Energy (IMAGE)
... provides affordable, accurate P/S separation. Feng (2017) outlined a way of extending the elastic RTM to least-squares mode, analyzing the artifacts...
2024
Improving reservoir imaging with FWI: A case study in the Columbus Basin, offshore Trinidad
Xiaolei Song, Simon Luo, Hu Jin, Imtiaz Ahmed, Akkel Paul, Nirala Boodoo, Ganyuan Xia, Sean Cardinez, Rodney Johnston
International Meeting for Applied Geoscience and Energy (IMAGE)
... with a conventional reverse-time migration image, FDR provides additional structural information with more balanced illumination thanks to a least-squares...
2024
Obtaining near-surface equivalent Q value from uphole survey data
Chaofeng Zhao, Wei Zhang, Jiantao Tian, Liying Ren, Qing Zhang, Jianyu Zhao
International Meeting for Applied Geoscience and Energy (IMAGE)
... equivalent Q value is obtained by the least-squares method, which reduces the multiplicity of solution. The near-surface Q value obtained by this method...
2024
Regularization strategies for Seis2Rock-based petrophysical inversion of prestack seismic data
Miguel Corrales, Juan Romero, Nick Luiken, Hussein Hoteit, Matteo Ravasi
International Meeting for Applied Geoscience and Energy (IMAGE)
... of least-squares optimization with a Laplacian regularizer to promote smoothness in the solution and counteract noise in the data. This study assesses...
2024
Paleomagnetism of the Upper Eocene Gries Ranch Formation, Grays Harbor County, Washington
Donald R. Prothero, Casey Burns
Pacific Section SEPM
... using the least squares method of Kirschvink (1980), and Fisher statistics were calculated for all three samples at this site. IRM acquisition analysis...
2001
Improved channel imaging using full-waveform inversion for deepwater Lingshui giant gas reservoir in South China Sea
Tao Wu, Dun Deng, Zijing Gong, Jie Cui, Rong Li, Lianlian Liu
International Meeting for Applied Geoscience and Energy (IMAGE)
...., 2015; D. Vigh et al., 2016). A workflow to integrate AdFWI, least-squares based FWI (LSFWI) and multi-scale common-image-point (CIP) tomography...
2024
Toward elastic free-surface topography with immersed boundaries
Edward Caunt, Rhodri Nelson, Fabio Luporini, Gerard Gorman
International Meeting for Applied Geoscience and Energy (IMAGE)
..., propagation of both compressive and shear phases yields improved imaging in contexts including reverse-time migration (RTM), least-squares RTM (LSRTM...
2024
High-resolution elastic full-waveform inversion using ocean-bottom nodes in Santos Basin, Brazil
Marilia Carneiro, Nathalia Ladeira Casado, Juliana Igarashi da Cruz, Pedro Barros, Chirag Parekh, Emmanuel Saragoussi, Bernardo Quijano
International Meeting for Applied Geoscience and Energy (IMAGE)
... mimics the results from data domain least squares migration. Therefore, the present work is divided in two complementary parts: the first involves...
2024
Finding the Nugget of Truth: Using Quantile Regression With Production Data for Comparison to Geological Controls and Completion Efficiency
Alan Lindsey, Keith Robertson
Unconventional Resources Technology Conference (URTEC)
... 𝑒𝑒 −( � 𝜏𝜏) . The mean projection is estimated using equation: 1� (1+𝑏𝑏∗𝐷𝐷∗𝑡𝑡) 𝑏𝑏 the least squares fit method, which minimizes the sum...
2017
Land seismic multi-parameter FWI imaging
Mason Phillips, James McLeman, Vlada Avramovic, Tom Rayment, Stuart Schmitt, Mike Varner, Yasser Khalifeh, Ahmad Ammar Chahine, Eskil Jersing
International Meeting for Applied Geoscience and Energy (IMAGE)
...—including all orders of multiples—when estimating the subsurface models. The inclusion of multi-scattering events, together with the least-squares...
2024
The direct linear electromagnetic inverse with constraints
Peter Walker
International Meeting for Applied Geoscience and Energy (IMAGE)
... is in ohms. Figure 3: The inverted resistance for the model in Figure 2 with no constrainsts (i.e using simple least squares). The colour scale...
2024
A Technique for Identifying Hydrocarbons Using “Old Electric Logs” and Contemporary Sonic Logs
Lee Sanders
West Texas Geological Society
... of gas a day. Figure 2B displays the least-squares regression analysis for the data set in the “pay zone”. The mean sonic travel time is 71 microseconds...
1995
Hourly Immersed Acquisition and Processing of Magnetotelluric Method for Noise Reduction
Alida Naufalia Aribah, Ikhsan Setyawan, Hidayat
Indonesian Petroleum Association
... Fisika dan Aplikasinya Larsen, J.C. 1989. Transfer Function: Smooth robust estimation by least-squares and remote reference methods, Geophys. J., 99...
2018
Testing Periodicity of Depositional Cyclicity, Cisco Group (Virgilian and Wolfcampian), Texas
Wan Yang , Michelle A. Kominz
Journal of Sedimentary Research (SEPM)
... thickness, and in reality, m is usually larger than n. Unconstrained least-squares regression is used to solve the overconstrained linear problem in Eq 1...
1999