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Keywords: grain size
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Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0033
... network simulation correlation well logging frequency grain size conductivity log interpretation annual logging symposium permittivity nd annual logging symposium dispersion spwla-2021-0033 salinity water-filled porosity machine learning artificial intelligence spwla 62 permittivity log...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0061
... uncertainty on reservoir evaluation was deemed high enough by the study team to motivate the acquisition of additional data comprising ultra-high resolution pictures (1.8μm/px) and topographic maps created from micron-accurate laser scans. We explain how continuous profiles of grain size indicators could be...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-III
... provide information about the dominant polarization mechanisms, which are linked to grain size, solid-fluid interfacial properties, porosity, fluid saturations, and wettability. In this work, we propose to narrow down the knowledge gap in interpretation of broadband dielectric measurements in water-, oil...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-L
...SPWLA 59th Annual Logging Symposium, June 2-6, 2018 1 GRAIN-SIZE DISTRIBUTION, GRAIN ARRANGEMENT, AND FLUID TRANSPORT PROPERTIES: AN INTEGRATED ROCK CLASSIFICATION METHOD FOR TIGHT-GAS SANDSTONES Mauro Palavecino and Carlos Torres-Verdín, University of Texas at Austin; Joachim Strobel, Wintershall...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-MMMM
... principles and uses a minimal number of parameters to describe the essential electromagnetic properties of well-sorted clean sandstones in the millihertz to gigahertz range. We investigated the relationship between the SIP effect and the dominant grain size of our sandstone collection. The dominant grain...
Proceedings Papers

Paper presented at the SPWLA 55th Annual Logging Symposium, May 18–22, 2014
Paper Number: SPWLA-2014-BBB
... lithofacies variation, paleogeological setting, formation heterogeneity, grain-size, grain sorting, volcanic lava flow pattern, porosity distribution and pore connectivity; is very critical for predicting the best reservoir facies and their spatial distribution across the basin. This study talks about an...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-87765
..., defining the vertical and the horizontal anisotropy of each interval of the reservoir. In clastic reservoir s a similar technique can now evaluate and determine the grain size distribution of the sand shale sequences, as well as sorting and grain size volumetric relationships, which can lead to a...
Proceedings Papers

Paper presented at the SPWLA 51st Annual Logging Symposium, June 19–23, 2010
Paper Number: SPWLA-2010-82643
... facies derived from the images through image character with the openhole log data. By using of textural analysis from images to refine computation of permeability in a variety of reservoirs, inferred grain size variations can be directly related to flow unit permeability in horizontal (kh) and vertical...
Proceedings Papers

Paper presented at the SPWLA 49th Annual Logging Symposium, May 25–28, 2008
Paper Number: SPWLA-2008-GGG
...SPWLA 49th Annual Logging Symposium, May 25-28, 2008 METHOD OF DETERMINING FORMATION GRAIN SIZE DISTRIBUTION FROM ACOUSTIC VELOCITIES AND NMR RELAXATION TIME SPECTRUM M. Gladkikh, J. Chen, and S. Chen, INTEQ, a division of Baker Hughes Copyright 2008, held jointly by the Society of Petrophysicists...
Proceedings Papers

Paper presented at the SPWLA 44th Annual Logging Symposium, June 22–25, 2003
Paper Number: SPWLA-2003-AA
... logs can only be used to imply grain size variations where there is an associated change in the permeability affecting the electrical properties of the formation (Prosser et al. 1995). Such variation in permeability is associated with depth of invasion of drilling mud filtrate. High permeability...
Proceedings Papers

Paper presented at the SPWLA 41st Annual Logging Symposium, June 4–7, 2000
Paper Number: SPWLA-2000-MM
... diffraction: quartz ranges from 75 to 84%, kaolinite from 6.2 to 10.6%, plagioclases from 2.5 to 5.3%, illite-mica from 1.5 to 3.4%, dolomite around 3%, and chlorite at trace levels. Values are averages for grain size classes. OBSERVATIONS AND COMPARISONS Grain size control The log(k)-linear 4 patterns...
Proceedings Papers

Paper presented at the SPWLA 41st Annual Logging Symposium, June 4–7, 2000
Paper Number: SPWLA-2000-G
... typical grain size (0.1–1.0 mm), all appreciable effects are linear with respect to the frequencies used in HDIL (10–150 kHz). The effects of pyrite can be divided into inductive and galvanic contributions. Inductive effect is due to eddy currents excited in the pyrite grains by the direct magnetic field...
Proceedings Papers

Paper presented at the SPWLA 27th Annual Logging Symposium, June 9–13, 1986
Paper Number: SPWLA-1986-FF
... used are also presented. Comparison of simulated cuttings data with the more reliable core analysis data are made to show the usefulness of cuttings analyses performed in field laboratories. log analysis Boyle mesh grain density drilling fluids and materials grain size sanple cuttings...
Proceedings Papers

Paper presented at the SPWLA 27th Annual Logging Symposium, June 9–13, 1986
Paper Number: SPWLA-1986-V
... section Upstream Oil & Gas log data rock characterization data interpretation University shale abundance x-ray diffraction analysis log response grain size evaluation mineral lithology society of petroleum engineers SPWLA TWENTY-SEVENTH ANNUAL LOGGING SYMPOSIUM, JUNE g-13.1986...
Proceedings Papers

Paper presented at the SPWLA 16th Annual Logging Symposium, June 4–7, 1975
Paper Number: SPWLA-1975-L
... of which had small percentages of clay were chosen with average grain sizes ranging from .09 to .29 mm. Resistivities were measured over a wide concentration range using solutions of NaCl, Na2SO4, NaHCO3, and CaCl2. The results were found to correlate with a simple equation that is easily applied to...
Proceedings Papers

Paper presented at the SPWLA 12th Annual Logging Symposium, May 2–5, 1971
Paper Number: SPWLA-1971-Q
... Tertiary formations of the Lake Maracaibo exhibit several characteristics which influence log response. Among these are varia- tions in sand-grain size and sorting, variations in shaliness, a wide range of formation resistivities (even in productive horizons), variation in bed thickness, variations in...
Proceedings Papers

Paper presented at the SPWLA 10th Annual Logging Symposium, May 25–28, 1969
Paper Number: SPWLA-1969-AA
... ABYSSAL GRAIN SIZE -- COARSE-FINE MEDIUM-FINE MEDIUM-PINE FINE FINE FINE-VERY FINE VERY FINE ENVIRONMENTAL CRITERIA SIIALLCIW- MARINE MEDIUM INTERMEDIATE SHALLOW- BRACKIJH- LOW INTERMEDIATE MARINE SHALLOW- MARINE HICR- INTERMEDIATE MEDIVM INTERMEDIATE- MARINE I. LOW DEEP DEEP DEEP MARINE LOW TO PAUCITY OF...
Proceedings Papers

Paper presented at the SPWLA 7th Annual Logging Symposium, May 9–11, 1966
Paper Number: SPWLA-1966-CC
... uniformly high porosities; however, a surface conductance effect in fresh water sands causes the formation resistivity factor to vary with both Rv and grain size. Because permeability is related to grain size, resistivity values indicate relative productivity. log analysis concentration fresh water...

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