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Keywords: saturation
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Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0067
... the original porosity available for fluid storage and transport. They also cause excess electrical conductivity, leading to errors when applying Archie s equation for water saturation (Hill and Milburn, 1956, Waxman and Smits, 1967). Shales are formed as mud-supported layers. They are made of very finegrained...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0084
... estimations error in well-log resolution, a 50% further decrease compared to the core support. The TimurCoates model/approach is the most reliable for data sets with a priori information about irreducible water saturation, yielding less than 22% relative standard error, yet it requires prior data...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0050
.... Operators utilize advanced logging systems and core data to gain a better understanding of the petrophysical properties for the formation. Nuclear magnetic resonance (NMR) measurements from wireline logging and from core analysis aids in determining properties such as fluid volumes and saturation. However...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0079
... assessment of water saturation and wettability. However, they require core-scale verification, which has been challenging due to the uncertainties in wettability distribution inside the core samples as well as the lack of a ground truth on the wettability of a given sample. The objective of this paper...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0028
... digital and physical description of capillary pressure saturation. and relative permeability in the high porosity chalk is complicated by both low permeabilities and heterogeneity. The main challenge with chalk is that flow occurs in a nano- environment. Physically, the nano-environment translates to low...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0011
... on the performance of those models in water saturation assessment remains to be tested. Frequency-domain dielectric permittivity simulations can model the influence of pore and grain geometries on dielectric permittivity without a need for explicitly defining those parameters. Individual impacts...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0004
.... An injection well was drilled about 100 ft from it. The water has high salinity. The porosity and lithology were confirmed using usual wireline logs; the structural dip was confirmed using a borehole imaging tool. To monitor the growth and movement of the CO2 plume resulting from CO2 injected, the saturation...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0054
... attention in processing is required when changes occur to the wellbore environment between runs, although this is mitigated by the improved environmental compensation scheme of the newer tool. We performed both standalone estimates of CO2 saturation from single-physics time-lapse measurements...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0033
...SPWLA 64th Annual Logging Symposium, June 10-14, 2023 DOI: 10.30632/SPWLA-2023-0033 DETERMINE OIL AND WATER SATURATIONS IN PRESERVED SOURCE ROCKS FROM 2D T1-T2 NMR Stacey Althaus, JinHong Chen, Qiushi Sun, and J. David Broyles, Aramco Americas Copyright 2023, held jointly by the Society...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0021
... 16.3 13 16.6 Figure 3 Solvent extraction approach Estimated Oil saturation from mathematically decontaminated GC-EOM Saturates C20+. EOM is extractable organic matter. DC is drill cuttings. Red indicates the gas cap sample, and green is from oil zones. Figure 4 Solvent extraction approach...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0012
... in a tight sandstone reservoir where three different models were tested: a clustering model based on machine learning, a flow zone indicator (FZI) model, and a flow unit discriminator model based on porosity, permeability, and irreducible water saturation. The results showed that the FZI model is the only...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0022
... simulations to quantify flow-dependent petrophysical properties of spatially heterogeneous rocks. An improved mud-filtrate invasion experimental procedure is introduced using water-based mud (WBM) and 3-in. diameter, 2-in. long cylindrical cores initially saturated with either oil or air, in which a 0.5...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0055
... for the quantitative evaluation of fluid saturation changes behind casing. However, the latter task can be not straightforward in case CO2 injection is performed into depleted gas reservoirs. This paper deals with a deep study to evaluate the diagnostic capability of various PNL measurements for fluid identification...
Proceedings Papers

Paper presented at the SPWLA 64th Annual Logging Symposium, June 10–14, 2023
Paper Number: SPWLA-2023-0052
... are typically governed by a combination of rock and fluid properties. The concept of fluid substitution (FS) is to create a measurement response at a different saturation than at which data are acquired downhole. In the context of nuclear magnetic resonance (NMR), FS is used to eliminate the hydrocarbon (HC...

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