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The AAPG/Datapages Combined Publications Database
Showing 1,680 Results. Searched 200,357 documents.
Geochemical Evaluation of Part of the Cambay Basin, India
A. Banerjee , K. L. N. Rao
AAPG Bulletin
... vitrinite reflectances plotted against depth for the two blocks under study. Least-squares best-fit lines for the data indicate hydrocarbon generation...
1993
Beyond chi-squared: Additional measures of the closeness of a model to data1
Alan G. Jones
Petroleum Exploration Society of Australia (PESA)
...al correlation in least squares regression .1, Biometrika, 37(3-4), 409-428. Durbin, J., and G. S. Watson (1951), Testing for serial correlation in lea...
2019
Resource Assessment and Profitability from Discovery Rate Forecasting
Konstantinos Zorbalas, Rudy E. Rogers
GCAGS Transactions
... of the discovery process and prices of oil and gas: Mathematical Geology, v. 20, p. 939-953. Marquardt, D. W., 1963, An algorithm for least-squares estimation...
1993
Transformation of Resistivity to Pseudovelocity Logs
Albert J. Rudman , Joseph F. Whaley , Robert F. Blakely , Maurice E. Biggs
AAPG Bulletin
...) using a higher order polynomial for the scale function; (2) fitting only one set of constants to the average scale function using a least-squares...
1975
Hydrothermics in the Wyoming Overthrust Belt
Gary W. Zielinski , , James A. Drahovzal , , Gail Moritz Decoursey , , Joseph M. Ruperto
AAPG Bulletin
...). Fig. 14. Mean annual surface temperature (Ts) vs. thermal gradient (g). Solid line is least-squares fit to data. Open symbols are measurement from...
1985
Statistical Methods For Log Analysis of Reservoir Properties: Chapter 1
John H. Doveton
AAPG Special Volumes
...: The Technical Review, v. 36, no. 4, p. 12-21. Etnyre, L. M., 1984a, Practical application of weighted least squares method to formation evaluation, Part I...
1994
Incorporating estimates of data covariance in elastic FWI to combat random and correlated noise
Luping Qu, Scott Keating, Kristopher A. Innanen, Xin Fu
International Meeting for Applied Geoscience and Energy (IMAGE)
... on this information. The least squares (L2) norm of the misfit between the observed and predicted data is the most commonly used penalty function for FWI (Tarantola...
2022
Comparison of Magnetic Vector Inversion With Sparse Norm Susceptibility Inversion Accounting for Demagnetization
John M. Weis, Lindsey J. Heagy, Douglas W. Oldenburg
International Meeting for Applied Geoscience and Energy (IMAGE)
... and smoothness terms in equation 4. To apply these norms we use the iteratively re-weighted least squares approach of Fournier and Oldenburg (2019...
2023
Elastic FWI for joint Vp, Vs and density inversion
Peng Shen, Uwe Albertin, Hermes Malcotti, Josh Haataja
International Meeting for Applied Geoscience and Energy (IMAGE)
... of the amplitudes and phases in the data to produce an elastic signature in the FWI residual, such as a least-squares residual, which occurs if the elastic model...
2024
Using Pressure Pulses to Understand Subsurface Connectivity: A Midland Basin Multi-Company Case Study
Stefan Hussenoeder, Bill Curry, Hilary Chang, Shelly Dutta, Navaneeth Babu
Unconventional Resources Technology Conference (URTEC)
... method used, the effect from the most contributing to least contributing well was sequentially subtracted from the pressure signal until little...
2025
On the connection between WRI and FWI: Analysis of the nonlinear term in the Hessian matrix
Ali Gholami, Hossein S. Aghamiry, Stephane Operto
International Meeting for Applied Geoscience and Energy (IMAGE)
... is expressed as the nonlinear least-squares (LS) problem (Tarantola, 1988; Pratt et al., 1998). 1 ∗ d − PA(m)−1 b∗ 2 , (1) 2 2 where m is the model...
2022
Using NMR-Based Indices for determining Accessible Mineral Surfaces in Unconventional Sedimentary and Igneous Rocks
Shaina Kelly, Olivia Terry, Zuhao Kou, Ron Bonnie, James Howard, Dragan Veselinovic, Michael Dick
Unconventional Resources Technology Conference (URTEC)
... an NWI value via a least-squares fit between a predicted T2 distribution (black trace) and URTeC 4265889 7 a measured T2 distribution (brown trace...
2025
Localized wavefield inversion (LWI): An adaptation of multi-block ADMM for localized FWI
Hossein S. Aghamiry, Ali Gholami, Stephane Operto, Alison Malcolm
International Meeting for Applied Geoscience and Energy (IMAGE)
... data-assimilated (DA) wavefields, that best jointly fit the observations and satisfy the wave equation in the least-squares sense. Then, the subsurface...
2022
Quantitative Mineralogy of Sandstones by X-Ray Diffractometry and Normative Analysis
Colin R. Ward , John C. Taylor , David R. Cohen
Journal of Sedimentary Research (SEPM)
... crystal structure and instrumental parameters by least-squares analysis of the profile. Some 14 instrumental parameters were identified, including...
1999
Analysis of Sonic Well Logs Applied to Erosion Estimates in the Bighorn Basin, Wyoming
Henry P. Heasler , Natalya A. Kharitonova
AAPG Bulletin
... estimates and the delineation of sonic anomalies. Statistical Fitting Technique A least-squares fitting technique is applied to equation 3. However...
1996
Potassium-Argon Isotopic Dating Method and Its Application to Physical Time-Scale Studies
Ian McDougall
AAPG Special Volumes
... analysis of argon extracted at temperatures indicated for hornblende 5H plotted on isochron diagram. Slope of line, determined by a least-squares procedure...
1978
Regional Trends of Sandstone Porosity Versus Vitrinite Reflectance—A Preliminary Framework
James W. Schmoker, Timothy C. Hester
Rocky Mountain Section (SEPM)
... are ordinary least-squares regression lines with Rm as the independent variable. A given Rm measurement is the mean of tens of individual reflectance...
1990
Characterization of Fracture Networks Using Close-Range Photogrammetric Mapping and CIS Analysis
J.A. Coe, E.P. Nelson
Rocky Mountain Association of Geologists
... were calculated by using a least squares fit of digitized points to a planar surface (Dueholm, 1979). Residual errors, calculated by the least...
1997
Kutei Basin: Feasibility Study of a Broadband Acquisition
Gilbert Del Molino, Fabri Ikhlas Gumulya, Dedy Sulistiyo Purnomo, Paolo Battini, Bonita Nurdiana Ersan, Francesca Brega, Ferdinando Rizzo, Giorgio Cavanna, Buia Michele
Indonesian Petroleum Association
..., the maximum allowed Q factor was limited at 200, and data were preconditioned with a least-squares smoothing (red crosses in figure 5 are Q measurements...
2013
Geological Factors Influencing Porosity Estimates From Velocity Logs
Roberto Sarmiento
AAPG Bulletin
..., travel time, shaliness, and depth. They were fitted to multi-dimensional equations by the method of least squares. The results are equations relating...
1961
Iron Sulfides in Pleistocene Deep Black Sea Sediments and Their Paleo-Oceanographic Significance: Geochemistry
Robert A. Berner
AAPG Special Volumes
... are on a CaCO3-free basis. Straight line represents least-squares fit for gray sediment. Table 1. Chemical Data for Core 1464K Table 2. Chemical Data...
1974
Geometric Analysis of the Reed Wash Detachment Fold Train, West Flank of San Rafael Swell, Utah.
Vickye R. Velez
Asociación Colombiana de Geólogos y Geofisicos del Petróleo (ACGGP)
... of the fold train. The best fitting plane for these x-y-z data was found by least-squares regression in which z was considered the dependent variable...
2004
Determination of T2 Cut-Off for Shale Reservoirs: A Case Study from the Carynginia Formation, Perth Basin, Western Australia
M. Nadia Testamanti, Reza Rezaee, Yujie Yuan, Dawei Pan
Australian Petroleum Production & Exploration Association (APPEA) Journal
... of 0.1 ms. The raw decays were later processed with the Lawson and Hanson module in Prospa software, which implements the non-negative least-squares...
2017
Improving seismic interferometry for traffic noise by wavefield decomposition and deconvolution
Weiping Cao, Xuri Huang, Yezheng Hu, Yungui Xu, Jing Tang, Hai Yao
International Meeting for Applied Geoscience and Energy (IMAGE)
... and least-squares subtraction of surface waves: 76th Annual International Meeting, SEG, Expanded Abstracts, 2783–2786, doi: https://doi.org...
2022
Geometry and Fractal Characteristics of the Sumatra Active Fault
Sigit Sukmono, M. T. Zen, W. G. A. Kadir, Lilik Hendrajaya, Djoko Santoso
Indonesian Petroleum Association
...-line least squares fit to these data and range from 1.00 ± 0.03 to 1.24 ± 0.03. For 1 < D < 2 one cannot consider the fault as a plane; one has...
1995