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The AAPG/Datapages Combined Publications Database

Showing 2,607 Results. Searched 191,995 documents.

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Son of Crossplot Fights Back

Piers Cooke-Yarborough

Southeast Asia Petroleum Exploration Society (SEAPEX)

... have been devised which essentially determine porosity and lithology by solving simultaneous equations – a set of tool response equations with one...


Rational Analysis of Future Rate of Natural Gas Production

Martin A. Elliott , C. G. Von Fredersdorff

AAPG Special Volumes

... with the definition of the rate of gas production, p = R/L, where R is proved reserves, formulates mathematical equations which closely fit the past...


Measurements and Analysis of Settling Velocities of Natural Quartz Sand Grains

Jumpei Baba, Paul D. Komar

Journal of Sedimentary Research (SEPM)

... of equations (6) through (9) where an average value of CSF or E has been used to represent the natural sand grains. Solving equations (4) and (8...


A hybrid deep learning network for tight and shale reservoir characterization using pressure and rate transient data

Hamzeh Alimohammadi, Hamid Rahmanifard, and Shengnan Nancy Chen

AAPG Bulletin

... a transient data set by solving analytical governing flow equations in different boundary conditions shown in Figure 2. Figure 2. Physical models...


Supercomputers for Beginners: Part II

Lasse Amundsen, Martin Landrø, Børge Arntsen

GEO ExPro Magazine

... seconds, while a small supercomputer system with 1,000 processors would need only one second. This way of solving parallel problems is thus highly...


Dipmeters: Part 4. Wireline Methods

Joseph F. Goetz

AAPG Special Volumes

... fraction of shale in laminated form for input into laminated shaly sand saturation equations. Fig. 1. Sketch of a four-arm dipmeter tool illustrating...


Abstract: Trace Interpolation and Elevation Statics by Conjugate Gradients; #90172 (2014)

Marcus Wilson, Robert J. Ferguson

Search and

... is a user parameter that controls the amount of smoothing (Menke, 1989). M is minimized when the normal equations are satisfied, so we recover φz+Δz...


Abstract: Estimation of Q-factor and Phase Velocity Using the Recovered Stress-strain Relaxation Spectrum; #90172 (2014)

Dali Zhang, Michael P. Lamoureux, Gary F. Margrave

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... representation of the complex modulus using rational ( [ p, q] -Padé) approximation. The approximation is obtained by solving a constrained least...


Hydrocarbon Type Estimation Using the Synthetic Logs: A Case Study in Baba Member, Gulf of Suez, Egypt; #20475 (2020)

Ahmed E. Radwan

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... of this study reveal that firstly the synthetic logs play a great role in solving petrophysical and geological problems, secondly there was a good...


Abstract: Inexact Full Newton Method for Full Waveform Inversion Using Simultaneous Encoded Sources; #90187 (2014)

Amsalu Y. Anagaw and Mauricio D. Sacchi

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..., but this is at the expense of solving a denser system of linear equations (Hessian matrix) at each iteration which is computationally expensive...


Evaluating the Performance of Decline Curve Analysis Equations During the Early Life of a Well Through the Quantification of the Uncertainty Associated with the Estimated Ultimate Recovery in a Shale Oil and Gas Formation

Agustín Terminiello, Pablo Crespo, Matías Nasca

Unconventional Resources Technology Conference (URTEC)

...Evaluating the Performance of Decline Curve Analysis Equations During the Early Life of a Well Through the Quantification of the Uncertainty...


From the Matrix to the Market - What You Don't Know Can Hurt You - Workshop Summary

William "Bill" McCain Jr., Kosta J. Leontaritis, Dave Bergman, Jack Lynn


... as the key to solving the set of equations in the formation damage model. The near-wellbore formation is broken into small equal segments and the production...


NMO Application in VTI Media: Effective and Intrinsic Eta (Geophysics Paper 6)

Joel Starr, Maz Farouki

Geological Society of Malaysia (GSM)

... and velocity in a CMP gather. NMO equations approximate the time shift which would be computed by tracing a ray through a horizontally layered Earth. A few...


Climate Models and their Application

Eric J. Barron, George T. Moore

Special Publications of SEPM

... utilize different methods for solving the model equations, finite difference methods and spectral transform methods. The use of truncated expansions...


A Simple Photogrammetric Method to Improve Quantitative Image Analysis in Geoscience Research: RESEARCH METHODS PAPERS

Jesus E. Caracuel, Javier Cardenal, Jorge Delgado-Garcia, Santiago Garcia-Lopez

Journal of Sedimentary Research (SEPM)

... digital images with a software developed by us in order to solve for colinearity equations, which calculate coordinates of terrain points. Thus...


Water Influx Predictions in Reservoirs with Aquifer Drive Using the Two-Phase Reservoir Integral Type Pseudo-Pressure with Applicability in Gas Hydrate Reservoirs; #42006 (2017)

Melvin Kome, Mohd Amro

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... in simplifying and solving complex diffusivity equations in reservoirs. Since its introduction by Ramey and Crawford (1966) in addressing the non-linear behavior...


Core Orientation by Graphical and Mathematical Methods

Hugh McClellan

AAPG Bulletin

... be found from equations (1) to (6) if desired. A graphical method of solving Case 1 problems was recently evolved by Curtis H. Johnson, using...


Comparison between the Different Approaches of Secondary and Tertiary Hydrocarbon Migration Modeling in Basin Simulators

Sylvie Pegaz-Fiornet, Bernard Carpentier, Anthony Michel, Sylvie Wolf

AAPG Special Volumes

..., fluid pressure field, and capillary pressure. Darcy migration is simulated by solving partial differential equations, and the numerical treatment...


Well-Log-Based Assessment of Elastic Properties in Organic-Shale Formations

Alvaro Aranibar, Clotilde Chen Valdés, Zoya Heidari

Unconventional Resources Technology Conference (URTEC)

... by solving the coupled equations given by  N i 1 * X i ( Ki  K SC ) P*i  0 (3) * X i (i  SC ) P*i  0 , (4) and  N i 1 where N...


Rectification of Wind-Blown Sand

William H. Wood

Journal of Sedimentary Research (SEPM)

... of grains in saltation] Thus we have two additional linear equations xi = 1 and yi = 1. If we further define during time t the apportionment = [number...


Diagenesis Through Coupled Processes: Modeling Approach, Self-Organization, and Implications for Exploration

W. Chen, A. Ghaith, A. Park, P. Ortoleva

AAPG Special Volumes

... numerically. Computationally, this process involves solving a large set of equations recursively using numerical techniques, such as finite elements...


Dynamic Geo-Process Modelling: A Technique to Help Identify Favorable Prospects

Michael J. Zeltlin

Indonesian Petroleum Association

... 127-128, Welty et al, 1984)). Solving these equations numerically can give insight to sediment distribution as a function of time and position (Tetzlaff...


Transformation of Arithmetic and Phi Size-Distribution Moments: NOTES

Basanta K. Sahu

Journal of Sedimentary Research (SEPM)

... the reader is referred to for further details. Solving the simultaneous equations 16 and 17 for the unknowns phi-mean (µ) and phi-variance (2 we obtain, 2(ln...


Formation of Ripple Bands in a Wave-Convergence Zone: DISCUSSION

T. G. Carter

Journal of Sedimentary Research (SEPM)

... and potential standing wave effects. Simultaneously solving equations (3) and (5) of the paper allows determination of the maximum theshold orbital bed...


Abstract: Regular Grids Travel Time Calculation … A Practical Huygens Wavefront Expansion Approach; #90187 (2014)

Zhengsheng Yao, Mike Galbraith, and Randy Kolesar

Search and

... difference approximations to the equations that are equivalent to the Eikonal equation with a fixed time interval. Mapping traveltime from wavefront...


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