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The AAPG/Datapages Combined Publications Database
Showing 1,682 Results. Searched 200,619 documents.
Seismic Processing Applications on a Personal Computer
Geophysical Service (Malaysia) Sdn. Bhd.
Geological Society of Malaysia (GSM)
... times for receivers at the same depth, and obtaining the slope of a least squares fitted line we can directly arrive at the ratio of P to S wave...
1989
Reservoir Optimization Using Event Resolution Imaging to Separate Good Wells from Bad Wells
Daniel R. Cook, John M. Warn
West Texas Geological Society
... does not use traditional discriminant analysis, linear regression, non-linear regression or any type of algorithm which attempts to minimize a least...
2005
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
Risk Reduction for Prospecting in the Unconventional Niobrara Play
Tony Rebec, Marino Pareja
Unconventional Resources Technology Conference (URTEC)
... (Vermeer, 2001) migrated gathers, estimating residual velocities in each azimuth sector, and then fitting an ellipse to the sectored results using least...
2013
Calibration of Kinetic Models with Data from Geologically Matured Organic Matter: Estimation of the Kinetics of Thermal Degradation of Individual Oil-generating Macerals
Johan K. Michelsen and Ganjavar Khavari Khorasini
The Society for Organic Petrology (TSOP)
... simultaneous equations of (1). The set of simultaneous equations bas no exact solution. However, if h e simultaneous equations c n be solved by least...
1993
Determination of Heat Flow in Some Exploration Wells in the Northern Part of the South China Sea
Xia Kanyuan, Xia Sigao, Chen Zhongrong, Seiya Uyeda, Osamu Matsubayashi, Toshiyasu Nagao, Li Xinyuan, Chen Sizhong, Tang Zhengyi, Rao Chuntao, Yang Zhanfei
Geological Society of Malaysia (GSM)
... SEA (Fig. 2) by using the least-squares method in the Pearl River Mouth basin as follows: Kl ~ Kg 1-0 1/1 = 4.40 0.63 (45 data for sandstone...
1995
Wave-equation based amplitude versus offset inversion in long time windows, with time-variant wavelets
Dries Gisolf, Peter R. Haffinger
International Meeting for Applied Geoscience and Energy (IMAGE)
.... Subsequently, this wavelet is convolved with a wavelet obtained from minimising the least squares difference between the data and the broad-band...
2022
Wide-angle AVO-inversion using constant P-traces: AVP-inversion
Dennis Cooke
International Meeting for Applied Geoscience and Energy (IMAGE)
..., G and 𝒅 𝜽 are known and we wish to invert equation (1) for m using a Least Squares (LS) method. A simple and often used LS technique is shown...
2022
Full-elastic AVA extraction using acoustic FWI
Michael Warner, John Armitage, Adrian Umpleby, Nikhil Shah, Henry Debens, Fabio Mancini
International Meeting for Applied Geoscience and Energy (IMAGE)
...-linear least-squares acoustic RTM (Kalinicheva et al., 2020). The speed, repeatability and high-signal-to-noise of the FWI approach, provide advantages...
2022
Integration of New Interpretation, Attribute Analysis and Inversion Results for the Dampier Sub-Basin, North West Shelf of Australia
Jarrad Grahame, Jianfeng Yao
Australian Petroleum Production & Exploration Association (APPEA) Journal
... reprocessed dataset is 14 275 km2 (Fig. 1). The Typhon reprocessing project involved the application of advanced techniques, including Kirchoff Least Squares Q...
2021
The Use of Geoelectrical Imaging Surveys for the Delineation of Different Subsurface Geological and Man-Made Features
S. S. Abdul Nassir, C. Y. Lee
Geological Society of Malaysia (GSM)
... Prospecting, 23, 380-390. LaKE, M.H. AND BARKER, R.D., 1996. Rapid least-squares inversion of apparent resistivity pseudo-section by a Quasi-Newtonmethod...
1999
Simultaneous inversion of velocity and reflectivity for enhanced seismic imaging
Yang Yang, Sriram Arasanipalai, Nizar Chemingui, Neil Paddy, Nicholas Montevecchi, David McCallum
International Meeting for Applied Geoscience and Energy (IMAGE)
... models are essential for high fidelity seismic interpretation. Full Waveform Inversion (FWI) followed by Least-Squares Reverse Time Migration (LS-RTM...
2022
Evaluating the impact from dual-azimuth, wide-azimuth towed streamer and ocean bottom node acquisitions for Brazil pre-salt exploration: A finite difference modeling study
Lei Zhuo, Jeff Bergeron, Jake Deeds, Robert Brandt, Dirk Erickson
International Meeting for Applied Geoscience and Energy (IMAGE)
... using least-squares RTM and its QC: 87th Annual International Meeting, SEG, Expanded Abstracts, 4504–4508, doi: https://doi.org...
2022
Teknik-teknik geoelektrik dalam Pemetaan air masin di Kuala Selangor (IN MALAY), Mapping of groundwater salinity at Kuala Selangor by geoelectrical techniques
Siti Zalipah Jumary, Umar Hamzah, Abdul Rahim Samsudin, Edna Pilis Malim
Geological Society of Malaysia (GSM)
...., 1984. An Introduction to Geophysical Exploration. Oxford. Blackwell Scientific Publications. LOKE M. H. & BARKER, R.D., 1995. Least-squares...
2002
Determination of Geothermal Gradient from Point Measurements of Temperature in Producing Wells
A. K. Talalayev
Petroleum Geology: A Digest of Russian Literature
... it into two segments, which were smoothed by the least squares method. The straight line for the upper part of the section, as is evident from...
1962
Acoustic Properties of Sediment on the Southern Tonga Platform as Determined from Seismic Sonobuoy Studies
Jonathan R. Childs
Circum Pacific Council Publications
... hyperbola as a function of dis tance, a plot of the squared values will fall along a straight line. In practice, measured values are fit by least-squares...
1985
Seismic lineaments characterization using independent component analysis
Abdulmohsen AlAli, Yazeed Altowairqi, Constantinos Tsingas, Ali AlSultan
International Meeting for Applied Geoscience and Energy (IMAGE)
..., D., 2011, Improving multiple removal using least-squares dip filters and independent component analysis: Geophysics, 76, no. 5, V91–V104, doi: https...
2022
Acoustic modelling with elastic AVA effects
Robin P. Fletcher, James Hobro, James Rickett
International Meeting for Applied Geoscience and Energy (IMAGE)
... to near zero angle, and increase frequency, to invert for normal incidence “pseudo” reflectivity from the reflections. As a non-linear least-squares...
2023
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)
... = sin cos ( )= sin cos ( ; ; ) ( ; ; ) . (3) As the inversion methods, e.g., least-squares based imaging and FWI, become the driving force...
2023
Application of Fractal Method for Quantifying Fault Geometry
Sigit Sukmono, Lilik Hendrajaya, Djoko Santoso
Indonesian Petroleum Association
... in Figure 3. Fractal dimension D of the Semangka fault is estimated from the slopes of straight-line least squares fit to these data and found to be D = 1.58...
1994
Delineation of Leachate Plumes at Two Waste Disposal Sites, Selangor
Abdul Rahim Samsudin, Bahaa-eldin Elwali A. Rahim, Wan Zuhairi Wan Yaacob
Geological Society of Malaysia (GSM)
.... Rapid least-squares inversion of apparent resistivity pseudosections by a quasi-Newton method. Geophysical Prospecting, 44:131-152. DAWSON, C.B....
2007
An acoustic wave equation with the gradients of velocity and density
Jianyong Bai, Orhan Yilmaz
International Meeting for Applied Geoscience and Energy (IMAGE)
... estimation in full waveform inversion or is used for optimizing migration image in least-squares RTM. Note that historically the reflectivity has been used...
2023
FWI imaging of complex subsalt Mesozoic targets from land to shallow waters
Timmy Dy, Minshen Wang, Sabaresan Mothi, Don Dobesh, Shengda Ding, Oscar Andrade, Pablo Ortega, Alfredo Vázquez Cantú, Silvino Domínguez García, Gerardo López Leyva
International Meeting for Applied Geoscience and Energy (IMAGE)
... a least-squares RTM might help the illumination and amplitude to some extent, the phase uncertainty persists. FWI Imaging, through iterative data-fitting...
2023
A Gravity and Magnetic Survey of the Ute Mountain Ute Indian Reservation, Colorado and New Mexico
Michael W. Webring, Gerda A. Abrams
Utah Geological Association
... Geometrics. Basic corrections consisted of diurnal field removal, heading and maneuver corrections, and least-squares adjustment using tie lines...
1996
Automated processing development at a CO2 site: Phase detection, location, magnitude
Jian Zhang, Kevin D. Hutchenson, Elige B. Grant, Paul A. Nyffenegger, Mark A. Tinker
International Meeting for Applied Geoscience and Energy (IMAGE)
... with the actual spectrum of the event. A model (Brune, 1970, 1971) is used to fit the event at each array between 10 and 90 Hz. A least squares minimization...
2023