... dynamic monitoring, which can accurately determine the oil saturation of the formation. However, due to the limitations of neutron generator yield and measuring speed, the statistical fluctuation in low and medium pore formation are large, masking the difference of spectrum measured and C/O response...

... Symposium, May 17-20, 2021 measurements and that oil saturation measurements are measured as a reference prior to water questionable because of filtrate invasion effect. In this distillation. paper, we present a unique assessment of key variables, factors, measurements and lab interpretation techniques 2...

... reservoir characterization well logging core analysis enhanced recovery structural geology spwla 62 flow in porous media upstream oil & gas clay content log analysis waterflooding spwla-2021-0097 facies variation residual oil saturation nd annual logging symposium saturation...

... between different tools. Tool-specific calibrations are used to convert apparent C/O log to reservoir oil saturation; the objective of C/O logging. In this paper, a new concept of intrinsic C/O logging is introduced so that raw data from different tools can be compared for enhanced log quality control...

... ABSTRACT The calculation with the Archie equation of water and oil saturations from electrical resistivity logs in water flushed reservoirs has historically been challenging. Previous publications on experiments conducted at the laboratory have demonstrated that, in waterflooded reservoirs...

... with very tight carbonates and organic carbon-rich formations. This paper presents a method to measure the total organic carbon (TOC), which, in this paper, represents the organic carbon in the matrix (kerogen and coal), and to estimate oil saturation in such challenging environment. A suite of wireline...

... of an oil lead in a nearby field. Important reservoir properties are measured through-casing and combined to compute porosity and mineralogy. Water saturation estimation done using porosity, mineralogy and measured sigma values is compared to oil saturation computed from total organic carbon (TOC) direct...

... to calculate the permeability in the virgin zone. The determination of the oil saturation in the flushed zone from NMR logs was done in two ways. First by applying statistically based Machine Learning Tools. Secondly, applying the widely used 2D-NMR methods, Diffusion vs. T2 and T1/T2 vs. T2 maps. Comparative...

... resonance (NMR) logging is known to provide an underestimated permeability, poor reliable oil typing and thus poor oil saturation and viscosity determinations, especially when the evaluation is based only on the spectra of transverse magnetic relaxation times (T2) (one-dimension NMR) [Romero et al., 2009...

... tools consistently showing higher oil saturation, especially near the oil-water contact, compared to that estimated from resistivity logs applying existing interpretation methods. They argued (as also Petricola and Watfa, 1995) that the brine-filled microporous grains around the oil-filled macropores...

... by Taber et al (1997) are concerned primarily with the principal reservoir properties, and generally exclude more detailed geological and petrophysical parameters. Upstream Oil & Gas well 3 workflow Reservoir Heterogeneity enhanced recovery heterogeneity oil saturation connectivity...

... reduced the original oil saturation from 70% to 30% with ~ 60 % displacement efficiency. Further implementation of re-injection of lean gas, vaporized ~20% of the remaining relict oil. Water flood/EOR patterns with seawater injection and produced water re-injection started in 1984, reducing initial oil...

... dielectric permittivity oil saturation saturation California SPWLA 58th Annual Logging Symposium, June 17-21, 2017 1 PINPOINTING PRODUCTIVE INTERVALS IN COMPLEX HYDROCAR- BON-BEARING ZONES USING RADIAL INVASION PROFILES FROM DIELECTRIC MEASUREMENTS Martin G. Lüling*, Steve Grayson#, Jim Hemingway...

...SPWLA 58th Annual Logging Symposium, June 17-21, 2017 1 COMPARISON OF THE STATISTICAL PERFORMANCE OF DIFFERENT PULSED NEUTRON WELL LOGGING TOOLS FOR OIL SATURATION MONITORING Anton Nikitin and Sean Dolan, Shell International Exploration and Production Copyright 2017, held jointly by the Society...

... log analysis Reservoir Characterization well logging aurignac reservoir database saturation geocellular model California Upstream Oil & Gas porosity oil saturation resistivity curve spwla 58 petrophysical software property model workflow core data dataset data quality...

... is expected to be present in the formation porosity. The analysis is combined with an independent source of porosity to identify the oil saturation of the formation. Additional information such as oil density and fraction of carbon in oil can help to reduce uncertainty. Pulsed-neutron spectroscopy analysis...

... design and execute a surveillance program capable of measuring absolute saturation with a precision of less than 2 saturation units. well logging cement Upstream Oil & Gas repeatability log analysis carbon oxygen log spwla 56 oil saturation saturation corroded cement largest...

... residual oil saturation bypassed oil Symposium enhanced recovery Upstream Oil & Gas pulsed neutron tool Alaska reservoir sandstone oil saturation surveillance perforation gas saturation SPWLA 56th Annual Logging Symposium, July 18-22, 2015 1 LOCATING BYPASSED OIL THROUGH IN-WELL...

... saturations determined from saturation logging, were used to create a series of surveillance oil maps (expected oil saturation and pay thickness). These maps were built by combining and mapping geological and fluid saturation data in the context of the stratigraphic and depositional descriptions available...

...-filled porosity for comparison with total porosity from traditional density-neutron logs. In heavy oil and low-permeability reservoirs, this methodology calculates oil saturation without requiring knowledge of water salinity. New dielectric measurements that enhance this technique are now available from...