Pore Water Salinity as a Tool for Evaluating Reservoir Continuity and Fluid Migration Pathways in the Wilcox Group of Central Louisiana

Masaaki Funayama ,, Jeffrey S. Hanor

GCAGS Transactions

... and Rm75, using techniques described in Funayama (1990). Linear least squares regressions through these data give reasonable fits. Coefficients from...

Applications of the Diffusive Time of Flight to a Data Driven Approach for Decline Curve Analysis

Ankit Bansal, Michael J. King

Unconventional Resources Technology Conference (URTEC)

..., in a least squares sense, to a sliding window of data (Sadeghi & Behnia, 2018). The length of the sliding window is a tuning parameter that is selected based...

Feldspar--Grain Size Relations in Cambrian Arenites, Upper Mississippi Valley

I. Edgar Odom

Journal of Sedimentary Research (SEPM)

... highly feldspathic. The correlation coefficient of 0.871 for the least squares regression line is good considering that the composition was determined...

Sampling Surficial Fluvial Gravels: The Precision of Size Distribution Percentile Estimates

Stephen Rice , Michael Church

Journal of Sedimentary Research (SEPM)

... upon n, and the 1/n dependency is modified such that sp' = ap'·s·nb' (7) where ap' and b' can be determined by least-squares regression. Figure 1 shows...

The Nature and Controls on Downstream Fining Within Sedimentary Links

Stephen Rice

Journal of Sedimentary Research (SEPM)

... fitted to D50 and D95 data using least-squares linear regression. On the basis of performance statistics there is little to choose between them (Table 1...

Continental Extension in Southern Britain and Surrounding Areas and Its Relationship to the Opening of the North Atlantic Ocean: Chapter 26: European-African Margins

R. Andrew Chadwick, Roy A. Livermore, Ian E. Penn

AAPG Special Volumes

... (1987) used a weighted-least squares procedure to derive a Euler pole directly from the 290-240 Ma segments of the APW paths. The best-fitting rotation...

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...

Contouring by Machine: A User's Guide

Richard F. Walters

AAPG Bulletin

... is derived as a least squares function of these values, weighted according FOOTNOTE 3. ACI Contouring Package available through E. J. Assiter, President...

Interstitial Water Composition and Geochemistry of Deep Gulf Coast Shales and Sandstones

Gene W. Schmidt

AAPG Bulletin

... obtained by the Louisiana Geological Survey (Harder, 1960; Hodges et al., 1963). A computer-plotted least-squares fit of the shut-in temperatures between...

The Hydrodynamics of the Big Horn Basin: A Study of the Role of Faults (1)

J. D. BREDEHOEFT , K. BELITZ , and S. SHARP-HANSEN

AAPG Bulletin

..., we decided to analyze all the data together (Figure 11). A least-squares fit of equation 3 to the data in Figure 11 yielded coefficients values...

Excess Area and Depth to Detachment

Jean-Luc Epard , Richard H. Groshong, Jr.

AAPG Bulletin

...-length measurements (equation 2). When data from more than two horizons are available, the line can be fit by least squares to obtain the best fit...

Pore structure of sediments from Green Canyon 955 determined by mercury intrusion

Hugh Daigle, Yi Fang, Stephen C. Phillips, and Peter B. Flemings

AAPG Bulletin

... shapes. Using nonlinear least squares optimization, we were able to fit this model to our data successfully at low capillary pressures, but the results...

Testing Laramide Hypotheses for the Colorado Front Range Arch Using Minor Faults

Eric A. Erslev, Scott M. Larson

Rocky Mountain Association of Geologists

... precise (reproducible) than the Angelier (1990) method whose least-squares algorithm for determining the reduced stress tensor can overly weight...

Geochemistry of CO2 sequestration in the Jurassic Navajo Sandstone, Colorado Plateau, Utah

W. T. Parry, Craig B. Forster, J. P. Evans, Brenda Beitler Bowen, Marjorie A. Chan

Environmental Geosciences (DEG)

... reflected light. The modal mineralogical composition of Navajo Sandstone samples was calculated using a linear, least-squares fit of whole-rock...

Comparison of Quantitative Mineral Analysis By X-Ray Diffraction and Fourier Transform Infrared Spectroscopy

Paul R. Craddock, Michael M. Herron, Susan L. Herron

Journal of Sedimentary Research (SEPM)

.... Quantitative mineral analysis by FTIR is enabled using a generalized least-squares inversion against a library of mineral standards with unique IR spectra...

Thermal History and Diagenesis of the Wilrich Member Shale, Spirit River Formation, Northwest Alberta

Cathy A. Connolly

CSPG Bulletin

... in the Deep Basin during the epeirogenic uplift subsequent to the Laramide Orogeny is approximately 2000 m. This value is based on the least squares...

Gas Sorption on Coal and Measurement of Gas Content: Chapter 9

Dan Yee, John P. Seidle, William B. Hanson

AAPG Special Volumes

..., equation 1 is usually written as [EQUATION (7)] so a linear least squares fit of P/V versus P gives the constants b and VM as the slope and intercept...

Spectral Analysis of the Middle Triassic Latemar Limestone

Linda A. Hinnov, Robert K. Goldhammer

Journal of Sedimentary Research (SEPM)

... Scienze Naturali, Sez. A, v. 42, p. 113-162. BARRODALE, I., AND ERICKSON, R.E., 1980a, Algorithms for least-squares linear prediction and maximum...

Direct estimation of fault trajectory from structural relief

Nathan W. Eichelberger, Alan G. Nunns, Richard H. Groshong Jr., and Amanda N. Hughes

AAPG Bulletin

...) and footwall (zf) depths are plotted for comparison. A least-squares regression through the pregrowth horizons gives the displacement (d) and fault depth...

Petrophysical heterogeneity in a Lower Cretaceous limestone reservoir, onshore Abu Dhabi, United Arab Emirates

S. N. Ehrenberg

AAPG Bulletin

... which samples are defined as “high permeability” or are excluded because of suspected plug damage. Solid diagonal lines are least-squares fits...

Search and Discovery

Search and Discovery.com

Influence of beach morphodynamics on the distributions of the opheliid polychaete Euzonus sp. and its feeding burrows on a sandy beach: Paleoecological and paleoenvironmental implications for the trace fossil Macaronichnus segregatis

Koji Seike

PALAIOS

... a least squares method, and the resulting R2 and P values were calculated from data from of the Hasaki Coast. A) Foreshore. B) Euzonus sp. C) Feeding...

GEOLOGY OF THE TALLADEGA BELT IN THE HIGHTOWER REENTRANT, CLEBURNE COUNTY, ALABAMA

Denny N. Bearce

Alabama Geological Society

..., v. .12, p. 1-65. Wright, T.L, an Doherty, P.C., 1970 A linear programming and least squares computer method for solving petroWright, T.L, anddDoherty...

Geological Processes and Sedimentation Rates of Wind-Tidal Flats, Laguna Madre, Texas

Robert A. Morton, Charles W. Holmes

GCAGS Transactions

... for 210Pb. The sedimentation rate can be obtained graphically from the mean slope determined by a least-squares best fit. For our analyses, the best-fit...

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...