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The AAPG/Datapages Combined Publications Database

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

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Old Electrical Log Interpretation [Pre-1958], Chapter 9: Salt Mud Surveys - Laterologs and Microlaterologs

Hilchie, D.W.

AAPG Special Volumes

... Sxo is the water saturation in the flushed zone.Ratio equations 9-2 and 9-3 and eliminating the common F and reorganizingand ifas found by Schlumberger...


Undulose Extinction in Fine-grained Rocks: NOTES

Robert E. Carver

Journal of Sedimentary Research (SEPM)

... (P) are given by figure 2. The values were obtained by solving the index surface equations for E' in a principal section of the ellipse (see Wahlstrom...


Abstracts: A Non-Linear Conjugate Gradient (CG) Method to Solve for Vp, Vs and Density from Seismic Elastic Impedance; #90173 (2015)

Yexin Liu and Zhuoheng Chen

Search and

... algorithms for the scalar, Reeves method: The non-linear CG algorithm for solving EI equations as follows: Step1: given initial and estimate and Step2...


Finding the Question is Often More Important than Finding the Answer, #70327 (2018).

David R. Spain

Search and

... simplification and idealization • Physical - 3D models that can be touched • Graphical - maps, charts • Mathematical – equations that represent systems...


Abstract: Problem solving in copper ores - integrated lithochemistry, ore petrography, concentrate chemistry, and ore mineral chemistry: examples from northern Chile

Milton C. Graves

Atlantic Geology

...Abstract: Problem solving in copper ores - integrated lithochemistry, ore petrography, concentrate chemistry, and ore mineral chemistry: examples...


Theory of Nuclear Transmission Densitometry Applied to Sedimentology and Geotechnology

Peter V. Meyers, Wesley J. Van Sciver, Adrian F. Richards

Journal of Sedimentary Research (SEPM)

... density. An algebraic expression can be derived for bulk density independent of water content with substitutions in equations (1), (3), and (4...


Thermodynamic Behavior of Liquid-Supercritical CO2 Fracturing in Shale

Xiaojiang Li, Gensheng Li, Wei Yu, Haizhu Wang, Kamy Sepehrnoori, Zhiming Chen, He Sun, Shikun Zhang

Unconventional Resources Technology Conference (URTEC)

... are calculated based on continuity and momentum equations. The temperature is obtained by solving energy equation. The thermal stress is derived based...


Protection Refrac: Analysis of Pore Pressure and Stress Change Due to Refracturing of Legacy Wells

Ali Rezaei, Mehdi Rafiee, Giorgio Bornia, Mohamed Soliman, Stephen Morse

Unconventional Resources Technology Conference (URTEC)

... containing a fracture. In the next section, the field equations of poroelasticity are explained first. Then, the displacement discontinuity method which...


Broadband Seismic Technology and Beyond: Part III: The Interaction between Ocean Waves and Recorded Seismic Data

Lasse Amundsen, Martin Landrø

GEO ExPro Magazine

... by a sine wave, analytical equations enable us to calculate the horizontal (u) and vertical (v) particle velocity and the pressure (p) as a function...


Rock Properties Computed from Random Pore Size Distribution

A. W. Talash, Paul B. Crawford

Journal of Sedimentary Research (SEPM)

... has been used to calculate the porosity and permeability of a porous matrix. The technique involves a solution of Poisseuille's and Darcy's equations...


Abstracts: Plane Wave Reflection and Transmission Coefficients for VTI Media; #90173 (2015)

Ritesh Kumar Sharma and Robert James Ferguson

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... (Tsvankin, 2001). For VTI media the wave equation separates into a coupled pair of the equations for the P-SV waves and into a single equation for the pure...


A Deterministic Lithology Model for the Green River-Upper Wasatch Interval of the Uinta Basin; #10745 (2015)

Robert Cluff, Suzanne Cluff, Ryan Sharma, Chris Sutton

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... by Doveton (1994) for solving a three-component system. The result is a set of three linear equations for each of the two ternary diagrams that calculate...


An Analytical Rate-Transient Analysis Model in Unconventional Light Oil Reservoirs Exhibiting Reservoir Heterogeneity and Multiphase Flow

Jinchang Li, Bin Yuan, Christopher R. Clarkson, Xuan Zhu, Yue Li

Unconventional Resources Technology Conference (URTEC)

... TLF, the improved Boltzmann variable allows the conversion of three highly nonlinear partial differential equations (PDE’s) (i.e., oil, gas and water...


Analysis of Fracture Interference - Coupling of Flow and Geomechanical Computations with Discrete Fracture Modeling

Jiahui Chen, Juliana Y. Leung

Unconventional Resources Technology Conference (URTEC)

...: the governing equations for poroelasticity are incorporated and the fixed stress splitting coupling methodology is employed. The results are compared...


Method of Calculating Reduced Pressures of Formation Waters in Water-Pressure Systems

G. P. Yakobson, Yu. M. Kachalov

Petroleum Geology: A Digest of Russian Literature

... of subsurface waters: ibid. 5. Yagodin, V. V., 1957, Method of determining reduced pressure of formation water in wells: Tr. VNII, no. 11. In solving...


Size distribution and dynamics of oil and gas field discoveries in petroleum basins

Alexey E. Kontorovich, Viktor I. Dyomin, Valery R. Livshits

AAPG Bulletin

...., 1988). In equations 3 and 4, the problem of determining the size distribution of pools is reduced to the calculation of the probability density function...


Wellbore Heat Transmission: A Simple Solution Technique

A. J. Durrant, R. K. M. Thambynayagam

Indonesian Petroleum Association

..., surface temperature, quality and geothermal gradient, what is the temperature of the injected fluid as a function of depth and time?". By solving...


Quantitative Modeling of Secondary Migration: Understanding the Origin of Natural Gas Charge of the Haynesville Formation in the Sabine Uplift Area of Louisiana and Texas

Lauri A. Burke

GCAGS Journal

... source rocks include the Smackover, Haynesville, and Bossier Formations. Thermodynamic equations of state were used to determine thermophysical properties...


Better Accuracy from Sidescan Records: The Object-Chord Method

Malcolm James, P. M. Tong

Geological Society of Malaysia (GSM)

... to Get Better Answers There are two ways of solving this problem. Going to the root of the matter, it is possible to attach transponders on the tow fish...


Formation Evaluation in Deltaic Sand Deposits: The Effect of Lignite Debris on Logs, Integration of Sand-Body Analysis

Mario Petricola, Jumardi, K. Saito

Indonesian Petroleum Association

... identified the rocks where these anomalous readings were found, as source rocks. Analytical Solution One way of solving this problem is by making...


Modeling Methane-hydrate Formation in Marine Sediments

Lili Zheng, Hui Zhang, Mingyu Zhang, Prasad Kerkar, Devinder Mahajan

AAPG Special Volumes

... for solving this set of discretized system equations of SPH is moderately standard. The SPH model is capable of modeling both saturated and unsaturated...


Some Thoughts on Future of Oil and Gas Business-Particularly in South Texas-

T. E. Pawel

Bulletin of South Texas Geological Society

... reflection, however, convinced me that to do so would be similar to solving an algebraic equation with, say, ten unknowns, each of which being one...


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