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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,619 documents.
Elastic frame moduli in a sandstone reservoir used for underground CO2 storage
Colin M. Sayers
International Meeting for Applied Geoscience and Energy (IMAGE)
... deformable than in the clean sandstones of Han (1986) at 40 MPa. This is demonstrated by the least squares fits for VCL < 0.02 shown by the full curves...
2022
Velocity estimation via model order reduction
Alexander V. Mamonov, Liliana Borcea, Josselin Garnier, Jrn Zimmerling
International Meeting for Applied Geoscience and Energy (IMAGE)
... for efficient velocity estimation. While the conventional FWI via nonlinear least-squares data fitting is challenging without low frequency information...
2022
Full-waveform inversion and FWI imaging for land data
James Sheng, Cristina Reta-Tang, Faqi Liu, Alfredo Vzquez Cant, Alejandro Cabrales Vargas
International Meeting for Applied Geoscience and Energy (IMAGE)
... has better defined events and faults (indicated with red arrows) due to the iterative least-squares data fitting, which enhances illumination...
2022
Acquisition geometry design based on full-wavefield migration
Billy A. Revelo Obando, Gerrit Blacquire
International Meeting for Applied Geoscience and Energy (IMAGE)
... evaluate the quality of the obtained image. We propose a least-squares target function JR defined as follows: JR,i = n R(zn ) − Ri+1 (zn ) 2 , (4...
2022
Reducing seismic quantitative interpretation uncertainty in complex geological environments: A case study from offshore Australia
Andrea Paxton, Lianping Zhang, Abdul Kholiq, Lee Davey, Richard Bisley, Dominic Fell, Leo Leon, James Shadlow
International Meeting for Applied Geoscience and Energy (IMAGE)
...-stack DDI in this workflow uses least-squares migration in the image domain to invert seismic data using a gradient-based optimized (GBO) algorithm...
2022
Retrieving high-resolution acoustic impedance using full-waveform inversion in presalt reservoir setting, offshore Brazil
Akshat Abhishek, Alok K. Soni, Rene-Edouard Plessix, Martijn Blaauw, Jaydip Guha, Gautam Kumar
International Meeting for Applied Geoscience and Energy (IMAGE)
... is within half of the wavelength) between observed and modeled data (Mora, 1988). A typical time-domain FWI least-squares objective function (Pratt...
2022
Optimized downward continuation for the one-way wave equation in TTI media
Cosmin Macesanu, Faqi Liu
International Meeting for Applied Geoscience and Energy (IMAGE)
... coefficients a, b, . . . are usually estimated by a least squares fit to the exact function P, whose value depends on the direction of waves (encoded...
2022
Problem Areas in Interpretation of Pressure Measurements in Thin and Multi-Layered Reservoirs
C. Fraisse, B. Simon, B. Seto, D. Nardio, J. Pouzet, Y. Grosjean
Indonesian Petroleum Association
... of the Tunu field, this gradient can only be derived from the linear, least squares fit of actual pressure measurements taken from a large number of thin water...
1987
Robust reconstruction via orthogonal matching pursuit with Fourier operators
Ji Li, Mauricio D. Sacchi
International Meeting for Applied Geoscience and Energy (IMAGE)
..., or l1 ). The fitting stage is implemented via Iterative Reweighed Least-Squares (IRLS) method (Holland and Welsch, 1977). We then transfer the optimized...
2022
Caribbean Reef Corals Montastrea annularis and Montastrea cavernosa--Long-Term Growth Data as Determined by Skeletal X-radiography: Reef Biota
Jon N. Weber , Eugene W. White
AAPG Special Volumes
... for Montastrea annularis is derived from Type 1 least-squares linear-regression analysis in which growth rate (G) is taken as the dependent variable...
1977
Shortest-path multiple well-log correlation
Hector Corzo-Pola, Sergey Fomel
International Meeting for Applied Geoscience and Energy (IMAGE)
...-squares method to get globally consistent shifts. While this method can enforce a global alignment of all logs, the least-squares fit can get...
2022
Australia: Depth Reprocessing Rejuvenates Gippsland Basin
Peter Baillie, Paul Carter, Jarrad Grahame, Joe Zhou, Nigel Mudge, CGG
GEO ExPro Magazine
... focused on the low-frequency background trend and updated the anisotropic parameters. • Least-squares Q pre-stack depth migration was selected...
2019
South Atlantic: The Bigger Picture
Hermann Lebit, Jeff Tilton, Sriram Arasanipalai, Pascal Ollagnon
GEO ExPro Magazine
... broadband seismic domains. The north-western Albian Gap restorations of the regional tectonic imaging and Least-Squares Migration domain is an approximately...
2019
Reflection waveform inversion assisted by full-wavefield imaging
Mikhail Davydenko, Eric Verschuur
International Meeting for Applied Geoscience and Energy (IMAGE)
...-FWI), where inversion-based imaging explains the reflection data by estimating the reflectivity model. The least-squares reverse-time migration (LSRTM...
2022
Wide-Angle Seismic-Reflection and -Refraction Data from the Solomon Islands
A. K. Cooper, R. A. Wood
Circum Pacific Council Publications
... record were determined by selecting and digitizing segments of the seismic first arrivals, fitting these segments by linear least squares, and using...
1986
Pengimejan lempung samudera dengan survei geoelektrik dan seismos: Kajian kes di Banting, Selangor (IN MALAY), Geoelectric and seismic survey of alluvium structures: a case study in Banting, Selangor
Umar Hamzah, Abdul Rahim Samsudin, Mohd Shahid Ayub, Lai Kian Voon, Rahman Yaacup, Lakam Mejus
Geological Society of Malaysia (GSM)
... kepada sejumlah blok dan dengan menggunakan skema kesongsangan kuasadua-terkecil (least-squares) akan mengira keberintangan yang sesuai bagi setiap blok...
2004
Deep Dix: Enhancing interval velocity model estimation through adversarial regularization
Joseph Stitt, Robert Clapp, Biondo Biondi
International Meeting for Applied Geoscience and Energy (IMAGE)
... early and later times are given equal priority through time indexing. Thus, we can pose the objective function in this least-squares problem with two...
2023
Upside down Rayleigh-Marchenko imaging: Towards a practical exact redatuming scheme for ocean bottom acquisitions
Ning Wang, Matteo Ravasi
International Meeting for Applied Geoscience and Energy (IMAGE)
...− , f+ m (5) which can be solved by the least-squares inversion. Subsequently, the Green’s functions can be retrieved according to equation 4. Θ−xR...
2023
Geophysical Techniques in the Study of Hydrocarbon-Contaminated Soil
Umar Hamzah, Mohd Azmi Ismail, Abdul Rahim Samsudin
Geological Society of Malaysia (GSM)
... survey. automatically subdivide the subsurface into a number of blocks and then it uses a least-squares inversion scheme to determine...
2008
A field data application of RockAVO: Data-driven, direct petrophysical inversion of prestack seismic data
Miguel Corrales, Hussein Hoteit, Matteo Ravasi
International Meeting for Applied Geoscience and Energy (IMAGE)
... primarily attribute this to the use of Laplacian regularization and least-squares solvers, and future endeavors will aim to overcome this limitation...
2023
Obtaining Low Frequencies for Full Waveform Inversion by Using Augmented Physics
Eldad Haber, Eran Treister, Elliot Holtham
Petroleum Exploration Society of Australia (PESA)
... the problem of the lack of low frequencies by changing the misfit function from least squares to some other misfit. However, there is a fundamental...
2016
Geophysical Investigation Using Resistivity and GPR: A Case Study of an Oil Spill Site at Seberang Prai, Penang
Zaw Win, Umar Hamzah, Mohd Azmi Ismail, Abdul Rahim Samsudin
Geological Society of Malaysia (GSM)
... and then use a least-squares inversion scheme to determine the appropriate resistivity values for each block in 2-D. In the resistivity survey...
2011
Lower Paleozoic Stratigraphy, Depositional Systems, and Geologic History, Needle Mountains, Colorado
John A. Campbell, David A. Gonzales
Utah Geological Association
... Paper 1321–A, 54 p. York, D., 1966, Least-squares fitting of a straight line: Canadian Journal of Physics, v. 44, p. 1079–1086. York, D., 1969, Least...
1996
Improving reservoir imaging using long-offset OBN data: A case study from Conger field, Gulf of Mexico
Bin Deng, Han Su, Bharat Bonala, Jiawei Mei, Jennifer Lewis, Estefania Ortiz, Wisley Martins
International Meeting for Applied Geoscience and Energy (IMAGE)
..., the structural image of the field. Furthermore, FWI Imaging helped improve the amplitude fidelity for reservoir interpretation, where least-squares...
2023
Meeting the imaging challenges at Atlantis with high-frequency elastic FWI
Alex Hao, Chi Chen, Zhiyuan Wei, Jiawei Mei, Li Jiang, Sam Buist, Obi Egbue, Luis Lopez, Daniel Tebo
International Meeting for Applied Geoscience and Energy (IMAGE)
... the steeply dipping salt flank still suffers from poor illumination despite the improved velocity model. By employing least-squares fitting of the full...
2023