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Keywords: assumption
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Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0027
...). One key Thomas-Stieber model assumption is that dispersed clay (shale) porosity is equivalent to laminar clay (shale) porosity. This assumption is valid in deep water Gulf of Mexico shaly sand formations in the central GOM, where the ThomasStieber model was developed and calibrated. The highenergy...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5083
... the usefulness of this workflow. log analysis tphi porosity assumption upstream oil & gas water saturation pulsed neutron log well logging gas reservoir july 29 spwla 61 openhole log matrix saturation gas pressure reservoir characterization symposium equation alberto abouganem stephen...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-BBBB
... of uncertainties inherent within the models, the sensitivity of different parameters and the underlying assumptions about the physical system made within each model. We present a detailed evaluation of six contrasting petrophysical models with variations in model outputs for gas in place assessed for both...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-SSS
... wells drilled in different sedimentary basins in SEA were selected to demonstrate the theory, challenges, and pitfalls of the most common approaches and techniques. The Thomas-Stieber approach is often regarded as the most suitable for a binary sand-shale system and if conditional assumptions are met...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-L
.... With these results, we hope to 1) maximize every dollar spent in core analysis, 2) focus oversight where it is truly required, and 3) accurately and consistently evaluate the core analysis in the Permian play for fast and value-driven business decisions. retort weight delta assumption Upstream Oil...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-QQQ
... analysis. machine learning summary spreadsheet pressure transient analysis pressure transient testing criteria real time system Upstream Oil & Gas spwla 55 test quality formation pressure assumption pretest investigation buildup Symposium Artificial Intelligence low perm...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-VV
... enough above the free water level. This paper seeks to lift the fog of confusion. log analysis particle porosity assumption saturation well logging Vclay spwla 55 shaley-sand trend Vshale shale mineralogy clay mineral Upstream Oil & Gas neutron density crossplot silt Symposium...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-IIII
... the receiver array calculated at specific discrete frequencies, coupled with novel phase unwrapping and alias correction. The approach is entirely data-driven, requiring no prior assumptions about slowness ranges or the number of modes present, and results are free of the spurious events which complicate...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-47154
... saturation diffusion pulsed neutron capture Badruzzaman Steam flood Engineering overestimation Symposium diffusion equation assumption saturation Berkeley equation SPWLA 51st Annual Logging Symposium, June 19-23, 2010 1 Accuracy of pulsed neutron capture Sigma-derived steam saturation...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-95856
... Simulation real time system Upstream Oil & Gas spwla 51 Probe assumption DST wpft tool Symposium FTWD tool SPWLA 51st Annual Logging Symposium, June 19-23, 2010 1 FORMATION TESTING GOES BACK TO THE FUTURE Mark Proett, David Welshans, Kris Sherrill, Jim Wilson, Jerry House, Ramez Shokeir...
Proceedings Papers

Paper presented at the SPWLA 50th Annual Logging Symposium, June 21–24, 2009
Paper Number: SPWLA-2009-38166
...-water and Juhasz models. Unfortunately these new models have not relieved the confusion, but probably have compounded it. Both classes of "shaly sand" saturation equations are in wide use. A review of the assumptions that underlie any of the equations in both classes shows that there are fatal flaws...
Proceedings Papers

Paper presented at the SPWLA 48th Annual Logging Symposium, June 3–6, 2007
Paper Number: SPWLA-2007-SSS
... Artificial Intelligence Brine conductance geometry well logging clay coating surface conductance assumption log analysis specific surface conductance surface area electrical conductivity Symposium parallel resistor model rock clay mineral different value Upstream Oil & Gas...
Proceedings Papers

Paper presented at the SPWLA 47th Annual Logging Symposium, June 4–7, 2006
Paper Number: SPWLA-2006-TTT
... parameter inversion log analysis Hessian matrix assumption frequency dielectric assumption cost function algorithm resistivity Symposium attenuation measurement well logging ohmm procedure Haugland Forward Model apparent resistivity spwla 47 invasion SPWLA 47th Annual Logging...
Proceedings Papers

Paper presented at the SPWLA 46th Annual Logging Symposium, June 26–29, 2005
Paper Number: SPWLA-2005-NN
... assumption spwla 46 gas-liquid flow production control Modeling & Simulation spinner revolution slip model production monitoring spinner multiphase spinner response model Symposium rotation rate holdup spinner average production logging spinner response model mass-fraction model new...
Proceedings Papers

Paper presented at the SPWLA 44th Annual Logging Symposium, June 22–25, 2003
Paper Number: SPWLA-2003-DDD
... response can be interpreted as a pore-size distribution. Evidence indicated that the foundational assumptions of pore isolation and fast diffusion may not be acceptable. These assumptions establish the critical link between an NMR response and a pore-size distribution. A practical extension of the results...
Proceedings Papers

Paper presented at the SPWLA 43rd Annual Logging Symposium, June 2–5, 2002
Paper Number: SPWLA-2002-JJJ
... Upstream Oil & Gas NMR measurement pore-size distribution NMR response porosity assumption coupling carbonate rock SEM image spwla 43 Symposium core sample saturation University SPWLA 43 rd Annual Logging Symposium, June 2-5, 2002 Analysis of NMR Diffusion Coupling Effects in Two-Phase...
Proceedings Papers

Paper presented at the SPWLA 42nd Annual Logging Symposium, June 17–20, 2001
Paper Number: SPWLA-2001-LL
... well logging resistivity value coefficient Symposium resistivity conventional transformation spwla 42 conductivity perturbation attenuation measurement log analysis attenuation dielectric assumption response function conductivity estimate equation Upstream Oil & Gas...
Proceedings Papers

Paper presented at the SPWLA 42nd Annual Logging Symposium, June 17–20, 2001
Paper Number: SPWLA-2001-AAA
... gradient Symposium pore space field gradient assumption interpretation gradient spwla 42 diffusion internal field gradient distribution University SPWLA 42 nd Annual Logging Symposium, June 17-20, 2001 INTERPRETATION OF RESTRICTED DIFFUSION AND INTERNAL FIELD GRADIENTS IN ROCK DATA K-J Dunn 2...

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