A mechanical basis of fault-bend folding

N. P. Benesh, and J. H. Shaw

AAPG Bulletin

... modified after Suppe (1983). We calculate S using a least-squares criterion and find that the trends in Γ for each ϕ value share very similar slope values...

Evaluating Reservoir Compartmentalization by Correlating Laboratory and Field Data

Michael J. Heymans

Rocky Mountain Association of Geologists

... permeabilities should be as close as possible to a least squares fit curve for the porosity-permeability relationship. Permeability estimates from...

Integrasi pemetaan lapangan, tafsiran lineamen dan survei tomografi keberintangan geoelektrik dalam pencirian jasad batuan granit terlindung shotcrete (IN MALAY) Integration of field mapping, lineament interpretation and electrical resistivity tomography survey to characterize granitic rock mass lining by shotcrete

Hamzah Hussin, Mohd Hariri Arifin, Tajul Anuar Jamaluddin, Muhammad Fahmi Abdul Ghani, Nadzari Ismail, Abdul Manan Abdullah

Geological Society of Malaysia (GSM)

... blok. Kaedah least squares inversion digunakan untuk menentukan nilai kerintangan bersesuaian dengan setiap blok dan seterusnya menghasilkan keratan...

High-Resolution Biostratigraphy in the Upper Cambrian Ore Hill Member of the Gatesburg Formation, South-Central Pennsylvania

James D. Loch, John F. Taylor

Special Publications of SEPM

... in calculation of are in bold Dashed line is a least squares fitof all data points Species numbers beside the data points refer to the species listed in Table I i...

Environmental Isotopes as Indicators of the Residence Time of Ground Waters in the Eagle Flat and Red Light Draw Basins of Trans-Pecos, Texas

Bruce K. Darling, Barry J. Hibbs, John M. Sharp, Jr.

West Texas Geological Society

... Global Meteoric Water Line (GMWL). Values are per mille with respect to Standard Mean Ocean Water (SMOW). The equation was derived by least-squares...

Clay Fabric and its Relation to Structural Properties in Mid-Continent Pennsylvanian Sediments

I. Edgar Odom

Journal of Sedimentary Research (SEPM)

... with Pennsylvanian coals in Illinois, Regression line computed by least squares (r=correlation coefficient) assuming semilogarithmic correlation...

Effect of Particle Shape on the Packing of Carbonate Sands and Gravels

Robert J. Vinopal , Alan H. Coogan

Journal of Sedimentary Research (SEPM)

... was established which relates the extrapolated, infinite grain volume to the grain volume measured in a single container (Vinopal, 1976). The least squares...

Littoral Transport in the Surf Zone Elucidated by an Eulerian Sediment Tracer Experiment

David B. Duane, William R. James

Journal of Sedimentary Research (SEPM)

... to sampling in this environment may preclude demonstrably successful application of this method for the foreseeable future. Eulerian techniques utilizing...

Isotope Geochemistry of Minerals in Australian Bituminous Coal

R. W. Botz , J. W. Hunt, J. W. Smith

Journal of Sedimentary Research (SEPM)

... by a "least-squares" fit to the existing data and represents the relative changes in total 18O value which would accompany the mixing of primary kaolinite...

Petrology of Cretaceous Mowry Shale of Wyoming

John Clements Davis

AAPG Bulletin

.... Soc. America Bull., v. 73, p. 1437-1442. Peikert, E. W., 1963, IBM 7090 program for least-squares analysis of three-dimensional geological...

Petroleum Prospects of Benue Trough, Nigeria

Joseph I. Nwachukwu

AAPG Bulletin

.... In this study, the time-temperature index (TTI) method was used to evaluate petroleum prospects of the basin, assuming a mean surface temperature...

Yield Per Effort for Additions to Crude Oil Reserves in the Lower 48 United States, 1946-1989: Geologic Note (1)

CUTLER J. CLEVELAND and V. M. PENDLETON

AAPG Bulletin

... influences on YPE that were described previously. We take the natural logarithm of both sides of equation 3 and use ordinary least squares to estimate...

The practice of graphical fluid-gradient interpretations of formation tester pressure data

Andrew Chen

AAPG Bulletin

... using ordinary least squares methods. A linear regression model assumes that a homogeneous reservoir fluid exists across the entire formation interval...

Experimental investigation of water and sediment discharge effects on alluvial fan-margin roughness

Hyojae Lee, Wonsuck Kim, Joel P.L. Johnson, Haein Shin, Duhwan Keum, Yunhyeong Lee, Wook-Hyun Nahm

Journal of Sedimentary Research (SEPM)

... the overall planform morphometries (Denny 1967). An elliptical curve was fit to a given alluvial-fan margin by least-squares regression. Basin-averaged fan...

Trishear: A Review of Kinematics, Mechanics, and Applications

Stuart Hardy, Richard W. Allmendinger

AAPG Special Volumes

... by this method at least superficially resemble those produced by (1) similar folding over a curved footwall ramp and (2) shear fault-bend folding...

Overburden Rock, Temperature, and Heat Flow: Chapter 9: Part II. Essential Elements

David Deming

AAPG Special Volumes

... of 21.6°C/km was derived by a least-squares regression. The implicit supposition is that the regression line (Figure 9.4) is a more accurate...

Pore-scale Evaluation of Nuclear Magnetic Resonance Measurements in Organic-Rich Mudrocks Using Numerical Modeling

Saurabh Tandon, Zoya Heidari, Hugh Daigle

Unconventional Resources Technology Conference (URTEC)

... the T2 distribution in CPMG pulse sequence by inversion of magnetization decay using the zeroth order least squares curve fitting scheme (Aster et al...

Seismic Refraction and Reflection Studies in the Timor-Aru Trough System and Australian Continental Shelf: Convergent Margins

R. S. Jacobson , G. G. Shor Jr. , R. M. Kieckhefer , G. M. Purdy

AAPG Special Volumes

... variations from a sloping datum were in the second layer. Travel times were fitted to straight lines by a least-squares solution that requires that reverse...

A scale-independent approach to fracture intensity and average spacing measurement

Orlando J. Ortega, Randall A. Marrett, Stephen E. Laubach

AAPG Bulletin

... of the power law, as determined by least-squares regression).The size distribution for the example discussed above (Figure 5) is shown in Figure 6. A power law...

Prewell and postwell predictions of oil and gas columns using an iterative Monte Carlo technique with three-dimensional petroleum systems modeling

Are Tømmerås, Øyvind Sylta, Matthias C. Daszinnies, and Davide Mencaroni

AAPG Bulletin

.... 219–235, doi:10.1016/S0928-8937(07)80020-8. Lloyd, S., 1982, Least squares quantization in PCM: IEEE Transactions on Information Theory, v. 28, p...

Validating novel boundary conditions for three-dimensional mechanics-based restoration: An extensional sandbox model example

Benjamin P. Chauvin, Peter J. Lovely, Joseph M. Stockmeyer, Andreas Plesch, Guillaume Caumon, and John H. Shaw

AAPG Bulletin

..., and J.-M. Morvan, 1997, A least-squares method for multisurface unfolding: Journal of Structural Geology, v. 19, no. 5, p. 735–743, doi...

AAPG Memoir 76, Chapter 18: Velocity Estimation for Pore-Pressure Prediction

David W. Bell

AAPG Special Volumes

... on a linear scale (Figure 6B) and as dτ on a semi-log plot (Figure 6A). Coefficients for the curves were determined from least-squares fits of the original...

Subsidence History of Australia's Southern Margin: Constraints on Basin Models

Kerry A. Hegarty , , Jeffrey K. Weissel , John C. Mutter

AAPG Bulletin

... at z = 0; and CK = characteristic depth (m). A least-squares exponential curve was fitted to the downhole porosity data, and compaction constants...

CSPG/CSEG/CWLS GeoConvention 2012, May 14-18, 2012 Calgary TELUS Convention Centre & ERCB Core Research Centre, Calgary, Alberta, Canada; - Abstracts, #90174 (2014).

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Burial and Temperature History of Gas Generation from Coaly Organic Matter in the Late Cretaceous Mesaverde Formation and Associated Rocks in the Deeper Portions of the Wind River Basin, Wyoming

C. E. Barker, B. L. Crysdale

Wyoming Geological Association

... versus depth for wells in the WHCS data base through 1991, Wind River Basin, Wyoming. The solid line shows a least squares regression fit for depth...