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The AAPG/Datapages Combined Publications Database

Showing 2,628 Results. Searched 192,705 documents.

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Abstracts: A Decomposition of RP into Contributions from single-parameter Reflectivities; #90173 (2015)

Kristopher A. Innanen

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... In AVO/AVA inversion, a linearized form of the Zoeppritz equations known as the Aki-Richards approximation and variants are used to model RP...



William H. Stalhuth

Asociación Venezolana de Geología, Minería y Petróleo (AVGMP)

.... 1: Stalhuth. Derivation of equations for obtaining true thickness of inclined beds 1 Published with the permission of Mene Grande Oil Co...


Graphic Determination of Stratigraphic and Vertical Thicknesses in Deviated Wells: GEOLOGIC NOTES

Russell B. Travis

AAPG Bulletin

... a and then using another graph for solving the cosine equations. One may prefer to solve the cosine equations with a calculator or slide rule. Figure 2 combines...


Porosity Reduction in Sandstone by Quartz Overgrowth: DISCUSSION

J. H. Fang, P. B. Visscher, A. M. J. Davis

AAPG Bulletin

... make slightly more precise estimates by solving a differential equation (as Leder and Park (1986) did), but because the result in either case...


Development of a Novel Compositional Simulation Approach to Model Recovery from Volatile Oil Reservoirs

E. Syahrial, T. S. Daltaban

Indonesian Petroleum Association

... Method for Solving Sparse Banded Sets of Simulataneous Linear Equations, SPE 5729, Proc. SPE-AIME 4th Symposium on Numerical Simulation, Los Angeles...


Size Analysis of Silt and Clay by Hydrophotometer: REPLY

Clifton F. Jordan, Jr.

Journal of Sedimentary Research (SEPM)

... for water, t = settling time, and s = settling distance which is 4 cm. Using these values and solving for t, these equations reduce to the following...


Relationship of Velocity Defined Accuracy to Phi Defined Accuracy in Settling Tubes: METHOD PAPER

C. L. McCormick, Eric S. Posmentier

Journal of Sedimentary Research (SEPM)

..., V. The two expressions that he gave were empirically derived equations for spherical grains falling at terminal velocity. His relationship between...


Optical Methods and Equipment for Processing Geophysical Data: ABSTRACT

Arthur L. Ingalls

AAPG Bulletin

... processing has become popular for solving a number of problems. One of the biggest advantages of optical data processing is the high data rate which can...


Abstract: Modelling the Response of Surface Water Cycle to Rising Atmospheric CO2: Implications for Impact Assessment on Groundwater Recharge; #90172 (2014)

Shusen Wang

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... integrates the three mechanisms of rising CO2 impact on ET through solving the coupled canopy energy-water-CO2 transfer equations. The model was first...


Understanding the Oil and Gas Reservoir Using Material Balance - Workshop Summary

John H. McMullen


... Aquifer Model Steady-State Equations Excel Solver Aquifer Productivity Index "Fetkovich" Analytical Aquifer Model Maximum Encroachable Water Iterative...


Depth of the Basal Shearing Plane in Cases of Simple Concentric Folding

Leslie Duska

CSPG Bulletin

... equations, representing the volume by the sectional area "S." End_Page 21------------------------- several suitable equations, representing the volume...


Abstract: New U-Pb zircon ages from the Caledonia Highlands, southern New Brunswick, Canada: solving some problems and creating new ones

Susan C. Johnson, Sandra M. Barr, Chris E. White, Adrian F. Park, Greg R. Dunning

Atlantic Geology

...Abstract: New U-Pb zircon ages from the Caledonia Highlands, southern New Brunswick, Canada: solving some problems and creating new ones Susan C...


Evaluation of Two Methods for Determining Soil Gas Permeabilities from Pneumatic Tests

Xun-Hong Chen

Environmental Geosciences (DEG)

... Method The Newton-Raphson method solves a system of nonlinear equations to find the roots of these equations. Equation (2) may be written in the form...


Calculating the True Thickness of a Folded Bed: GEOLOGICAL NOTES

G. D. Hobson

AAPG Bulletin

... of the beds caused by depositional conditions or by the sharp folding of incompetent beds. Instances in which it is essential to apply the equations...


Abstract: Blind Surface Consistent Wavelet Estimation; #90187 (2014)

E. Bongajum, N. Kazemi, and M. D. Sacchi

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... deconvolution (Rietsch, 1997) to the case of SCD. In other words, the homogenous system of equations arising in Euclid deconvolution is reformulated in terms...


Abstract: Modified Euclids Blind Deconvolution Via Sparsity Optimization on a Sphere; #90187 (2014)

Nasser Kazemi and Mauricio D. Sacchi

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.... The method is a modification of Euclid’s blind deconvolution where the multichannel impulse response is estimated by solving a homogeneous system...


Rate Dependency of Bilinear Flow in Fractured Shale/Tight Gas Reservoirs

M.S. Kanfar, C.R. Clarkson

Unconventional Resources Technology Conference (URTEC)

..., current analytical equations for the bilinear flow period are particularly inaccurate for gas wells. This inadequacy can be explained with the fact...


A Unified Leak-off and Flow-back Model for Fractured Reservoirs

Dylan Copeland

Unconventional Resources Technology Conference (URTEC)

... for solving the proposed model numerically is presented, as well as equations for coupling to a fluid dynamics model inside the fractures. Simulation results...


Sieve Load Equations and Estimates of Sample Size

Norman C. Janke

Journal of Sedimentary Research (SEPM)

...Sieve Load Equations and Estimates of Sample Size Norman C. Janke 1973 Vol. 43 No. 2. (June), A semi-empirical expression for sieve loads is W (gms...


Surface Modeling for Sedimentary Basin Simulation: Chapter 8

John C. Tipper

AAPG Special Volumes

... a rectangular grid. McCullagh (1981) has provided a useful comparison of the two approaches, in the context of contouring. For solving equations...


Introduction to Nonlinear Models

Gerard V. Middleton and David M. Rubin

Special Publications of SEPM

... ical model", that is, a set of equations that are designed to represent some aspect of the real world. We recognize that other types of models...


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