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Keywords: correlation
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Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 60 (04): 469–479.
Paper Number: SPWLA-2019-v60n4a1
Published: 01 August 2019
...Seth Brazell; Alex Bayeh; Michael Ashby; Darrin Burton The process of well-log correlation requires significant time and expertise from the interpreter, is often subjective and can be a bottleneck to many subsurface characterization workflows. Algorithmic approaches to well-to-well correlation...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 60 (02): 181–207.
Paper Number: SPWLA-2019-v60n2t1
Published: 01 April 2019
... Petrophysicists & Well Log Analysts well logging log analysis Artificial Intelligence correlation workflow mineral pyrite equation water saturation inversion estimation estimate storage capacity total porosity total water saturation saturation reservoir organic mudstone petrophysics...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 59 (05): 720–734.
Paper Number: SPWLA-2018-v59n5a10
Published: 01 October 2018
... domain when compared against conventional porosity-permeability correlations. Furthermore, the method effectively optimized the number of rock classes, making it a promising approach for field cases with limited core measurements and no prior knowledge about rock classes. Results also confirmed that our...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 59 (05): 694–702.
Paper Number: SPWLA-2018-v59n5a8
Published: 01 October 2018
... reservoir, the digital rock models show the microscopic composition of each CT-scan voxel. For upscaling purposes, we established a quadratic correlation between the gray values in a CT scan and the porosities measured on core plugs. This correlation allowed us to generate a synthetic porosity log of...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 59 (04): 439–456.
Paper Number: SPWLA-2018-v59n4a2
Published: 01 August 2018
... characterization enabled quantification of actual nonlinearity in the holdup sensor response and provided a better understanding of its sensitivity to different phase holdups. The resulting correlations enable more accurate phase holdup and flow-rate calculations that are compared to actual flow rates from the...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 59 (01): 25–34.
Paper Number: SPWLA-2018-v59n1a2
Published: 01 February 2018
... all the samples have the same stress dependency, thus comparing measured permeabilities at a single stress with values calculated from standard MICP data, corresponding at different threshold pressures, can lead to erroneous correlations. Therefore, the estimation of permeabilities from standard MICP...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 57 (03): 223–232.
Paper Number: SPWLA-2016-v57n3a1
Published: 01 June 2016
... combination of depositional and diagenetic processes and whose petrophysical character is predictable, expressed in terms of porosity, permeability and capillary properties. 1 6 2016 1 6 2016 2016. Society of Petrophysicists & Well Log Analysts flow in porous media correlation...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 57 (02): 140–155.
Paper Number: SPWLA-2016-v57n2a5
Published: 01 April 2016
... model is the widely observed near- linear relationship between measured 0°, 45°, and 90° P- and S-wave velocities in different shale formations. Based on those linear correlations, wave velocities at different angles (e.g., 45° and 90°) can be derived from the log-measured acoustic-wave velocity (e.g...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 55 (04): 319–332.
Paper Number: SPWLA-2014-v55n4a5
Published: 01 August 2014
... exchange capacity (CEC) was observed from approximately SSA = 11.9m 2 /g and CEC = 2.9 cmol/kg for the most carbonate-rich samples, up to SSA = 110.1 m 2 /g and CEC = 18.3 cmol/kg for the most clay-rich samples. Excellent correlations exist between low-frequency (10 MHz) dielectric response, CEC, and SSA...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 55 (01): 51–56.
Paper Number: SPWLA-2014-v55n1a5
Published: 01 February 2014
... result is the derivation of a "petrographic-coded thermal-conductivity log." 1 2 2014 1 2 2014 2014. Society of Petrophysicists & Well Log Analysts Reservoir Characterization machine learning Artificial Intelligence correlation sandstone Upstream Oil & Gas mineral...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 54 (06): 531–537.
Paper Number: SPWLA-2013-v54n6-A1
Published: 01 December 2013
... prediction december 2013 University formation factor Applicability Predict Permeability equation Purcell mercury porosimetry electrical measurement permeability correlation diameter capillary pressure pore-throat-size distribution December 2013 PETROPHYSICS 531 ABSTRACT PETROPHYSICS, VOL. 54...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 54 (04): 341–348.
Paper Number: SPWLA-2013-v54n4-A2
Published: 01 August 2013
... error in saturation is >10%. Using Maxwell's equations we have found a strong linear correlation between m and the difference between the effective porosity and conductive porosity. The functional relationship between the conductive porosity and the effective porosity is not static and can be shown...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 54 (04): 368–382.
Paper Number: SPWLA-2013-v54n4-A4
Published: 01 August 2013
... different petrotypes (good, intermediate and poor). Good correlations between different petrotypes with geological core descriptions, along with the good conformance between different petrotypes with production data ascertain the practical applicability of such petrotyping. It was possible to upscale such...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 54 (02): 76–90.
Paper Number: SPWLA-2013-v54n2-A1
Published: 01 April 2013
... was drilled with water-based mud (WBM) and logged with a wireline NMR tool, and Well B was drilled with oil-based mud (OBM) and logged with an LWD NM tool. The results compare generally well with the resistivity derived saturation, but local deviations are found. Similarly, permeability correlations...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 52 (05): 331–343.
Paper Number: SPWLA-2011-v52n5a1
Published: 01 October 2011
... ratios show variable correlation, some biases, but no major discrepancies, with the excep- tion of the gadolinium comparison that was not used for further analysis because gadolinium is not asso- ciated with any of the minerals solved for. No cali- bration shifts were made to any of the spectroscopy...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 52 (01): 50–57.
Paper Number: SPWLA-2011-v52n1a3
Published: 01 February 2011
...David K. Potter; Tariq M. Al-Ghamdi; Oleksandr P. Ivakhnenko ABSTRACT Recent work has shown how magnetic susceptibility and hysteresis measurements correlate with several petrophysical parameters in clastic reservoir samples. The present paper applies these techniques to carbonate samples...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 51 (06).
Paper Number: SPWLA-2010-v51n6a1
Published: 01 December 2010
... across many decades of scale. Registration techniques are then used to couple information at different length scales. First an image of a 3D plug (4 cm, 20 micron voxel size) is correlated to a sample at macroporous resolutions (8 mm diameter, 4 micron voxel size). We then focus on coupling SEM and...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 46 (02).
Paper Number: SPWLA-2005-v46n2a3
Published: 01 March 2005
... physical properties. For several years, fluid properties have been derived from NMR measurements by correlating relaxation time characteristics with hydrocarbon viscosity. Due to experimental limitations, these relations have mostly been developed at ambient pressure by either measuring a range of oils or...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 45 (05).
Paper Number: SPWLA-2004-v45n5a4
Published: 01 September 2004
... dependent on the recovery process. Consequences on sampling for coreflood programs, as well as inputs of simulation models, are pointed out. Modeling & Simulation correlation porosity permeability curve saturation flow in porous media ORW oil relative permeability geometry wettability...
Journal Articles
Petrophysics - The SPWLA Journal of Formation Evaluation and Reservoir Description 45 (04).
Paper Number: SPWLA-2004-v45n4a3
Published: 01 July 2004
...Faruk Civan ABSTRACT Application of the Arrhenius equation is extended and demonstrated for correlation of the temperature effect on wettability-related properties of rock. In addition, it is verified with experimental data, including the capillary pressure, unfrozen water content, wettability...

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