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Keywords: sandstone
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Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5007
... studies reckon that can act as seal or source-rock, is characterized by the intercalation of shales, siltstones, and sandstones. During the drilling of a well, with the subsequent detection of gas, three 18 m long whole-cores were extracted for geological and petrophysical studies. In addition, a complete...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5017
... seismic spwla 61st shale histogram june 24 conglomerate classification fine sandstone july 29 symposium resistivity upstream oil & gas zonation sandstone algorithm image feature gamma ray zone boundary lithofacies variogram core data borehole image SPWLA 61st Annual Logging...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5004
... reservoir well logging clay-rich interval evaluation spwla 61st diagenesis sandstone symposium reservoir federal university porosity carbonate june 24 reservoir characterization structural geology campos basin july 29 carbonate reservoir dissolution clay mineral brazil deposit...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5056
... significant stakes in Sand/Shale thin beds and presents a pragmatic workflow. The first step is to identify the intervals where the TBA is both applicable and useful. The methodology effectively applies to thin beds of Sandstone and Shale with sharp transition and very distinct petrophysical properties...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5102
.... Available rock data were initially classified into lithofacies according to Mutti facies. For the interpretation of the electrofacies, a reclassification was made based on the lithofacies described in the Bouma sequence, resulting in 5 clusters correlated to conglomerate and sandstone to interlaminated and...
Proceedings Papers

Paper presented at the SPWLA 61st Annual Logging Symposium, June 24–July 29, 2020
Paper Number: SPWLA-5057
... the sandstone. Dykes had large vertical reach with corresponding high hydrocarbon column, while sills had low vertical relief with large lateral extent. Intervals of brecciated sands were also observed within the injectite complex, especially where sands were thin. These brecciated sands contained...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-D
... a library of different rock types obtained from sources worldwide. We present examples of the data collected so far on typical, (mainly clean, i.e., low clay content) sandstones and carbonates as a function of water saturation, for air-brine and oil-brine systems. We also show how this data can be...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-CCCC
.... Mehmani pore-network model Symposium Artificial Intelligence Simulation spwla 60 Upstream Oil & Gas DRP workflow physics direct numerical simulation pore space Milliken rev permeability Reservoir Characterization modeling sandstone Prodanović porous media SPWLA 60th Annual...
Proceedings Papers

Paper presented at the SPWLA 60th Annual Logging Symposium, June 15–19, 2019
Paper Number: SPWLA-2019-CCCCC
... properties across multiple interbedded intervals. Commonly used solutions are limited to shaly sandstone models to account for either presence of graincoating clay in sandstones or laminated shale-sandstone systems. Other solutions rely on volumetric techniques which require subjective interpretation of...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-NNN
... were made. This has allowed us to model absolute permeability to within a factor of two for sandstone samples having laboratory-measured permeabilities ranging from 175 mD to 8D, and builds on a calibration data set of approximately 30 samples. For the original data set, modeled permeability agreed...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-L
...-size distributions. A non-unimodal throat-size distribution will be observed, for instance, in cases where different grain sizes are arranged in laminated form (e.g., aeolian sandstones). Clastic rocks that have been subject to extreme diagenesis and recrystallization, such as tight-gas sandstones...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-HHH
.... The fast-forward algorithm was then applied to a field case featuring a high-angle well penetrating a Norwegian sandstone with light hydrocarbons; good agreement was obtained with field logs. Upstream Oil & Gas borehole migration length well logging approximation sandstone detector...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-QQQ
... highly bioturbated sandstones, which were deposited on a subsiding shallow-marine shelf under the influence of tectonic movements. The formation has been cored a lot, and is mostly homogeneous in appearance. No preserved primary sedimentary structures can be seen in the fine to very fine sandstones due...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-PPP
... the procedure; also multi-energy acquisitions are suggested for more accuracy in acoustic response estimation. log analysis Upstream Oil & Gas machine learning Artificial Intelligence attenuation information experiment well logging Fluid Dynamics Radiograph prediction sandstone...
Proceedings Papers

Paper presented at the SPWLA 59th Annual Logging Symposium, June 2–6, 2018
Paper Number: SPWLA-2018-JJJ
... establish a new directional permeability model combining NMR and directional resistivity measurements, and (c) to test the reliability of the new model for permeability assessment in formations with multi-modal porosity (e.g. carbonate and tight sandstone formations). We numerically simulate the...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-MMMM
... polarization (SIP) effect, in which the impedance phase has a near-resonance peak at a characteristic frequency due to a strong polarization response. In this study, SIP spectra were measured on a collection of quarried clean sandstones saturated with brines. The influence of other factors on the SIP effect...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-SSS
... sandstone compaction silt sequence well logging facies porosity assumption evaluation Symposium silty facies spwla 58 Boomerang reservoir resistivity estimation anisotropy SPWLA 58thAnnual Logging Symposium, June 17-21, 2017 1 THE PROBLEM WITH SILT IN LOW RESISTIVITY LOW CONTRAST PAY...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-RRR
... relationship developed in the paper is used to describe water-wet and gas-saturated sandstone trends, and to independently calculate water saturation from a proposed crossplot in low and medium porosity isotropic sandstones. These proposed Vp/Vs vs. Vs crossplot water saturation results are compared to...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-ZZ
... transforms do not work for our tight sandstones, and, hence we developed a general method to optimize permeability transform for any given reservoir from laboratory data and applied the method to a tight sand reservoir. Specifically, we report on: A systematic method developed to search for an optimal NMR...
Proceedings Papers

Paper presented at the SPWLA 58th Annual Logging Symposium, June 17–21, 2017
Paper Number: SPWLA-2017-XXXX
... appropriately represent the thin-bedded and micro-laminated sandstones and siltstones. In addition, point load tests measured values of fracture toughness for specific lithofacies from 600 to 1100 psi-in½. In comparison, the default value for a sandstone system is 1000 psi-in½. Other mechanical properties, e.g...

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