... density logs. Importantly the es- This paper was prepared for the SPWLA 62nd Annual Logging Symposium timation quality increases not only in the proximity of held online from May 17 20, 2021. the shallow tool but also extends to the look ahead of the extra-deep EM capabilities. We speci cally quantify...

... density log along the slowness axis. An edge-detection method is then applied to capture the leading edge associated with the shear slowness and to form an initial estimate of the formation shear slowness based on slowness value at the leading peak on the slowness density log. This shear slowness forms...

... Reservoir Characterization dtc log spwla 59 Symposium information similarity correction reconstruction Upstream Oil & Gas detection algorithm prediction interval petrophysicist outlier fraction workflow well 13 density log ml result footprint dataset SPWLA 59th Annual Logging...

...SPWLA 58th Annual Logging Symposium, June 17-21, 2017 1 ADVANCES IN DENSITY LOG PROCESSING DELIVER ENHANCED PRECISION AND OPERATIONAL EFFICIENCY J.R. Samworth, P.J. Williams and B. Clarricoates, Weatherford Copyright 2017, held jointly by the Society of Petrophysicists and Well Log Analysts (SPWLA...

... the steps described below. 1. Log Squaring. A unique log squaring algorithm (Shetty et al., 2012) is applied to the density log to establish boundary positions and initial values of layer densities. The bottom-quadrant density log, computed from the image, is used for log squaring. This log has...

... readings onto standard curves using a continuous normalization process). The method is illustrated for the case of density logs, and validated using model and marker bed data, including for the challenging case of beds with high density contrast relative to adjacent formations. The method is seamlessly...

... to log correlation, which is common practice for porosity calculations using the density log. A volumetric rock model has been used to reconcile core and log data as well as to calculate the saturation of reservoir bitumen. The methodologies for reservoir bitumen characterization introduced here can...

... neutron Upstream Oil & Gas rfq factor effective permeability Symposium log analysis dynamic petrophysical property porosity rock type mud-filtrate invasion separation density log rock classification resistivity measurement permeability well logging petrophysical property movable gas...

..., density, neutron and gamma ray data. Permeability correlates better with a linear combination of density and neutron logs (Figure 3). Figure 3 Permeability derived log (red left track), linear combination between density and neutron log (light green left track), density log (dark green right track...

... well logging petrophysical property residual oil saturation density log Upstream Oil & Gas neutron synthetic case Modeling & Simulation water saturation hydrocarbon saturation mud-filtrate invasion log analysis residual hydrocarbon saturation porosity saturation...

... well logging joint inversion method hydrocarbon reserve machine learning Upstream Oil & Gas water saturation conductivity log log analysis spwla 48 pay zone Symposium estimation University saturation resistivity log inversion density log resistivity Artificial Intelligence...

... near-detector density well logging neutron investigation Symposium log analysis neutron porosity log log simulated density measurement density log panel show shale bed Upstream Oil & Gas porosity sand bed vertical resolution spwla 47 vertical well SPWLA 47th Annual Logging...

... no uncertainty. This is not the case for the neutron and density logs, because, on one hand the wet clay point is log dependent, whereas on the other the matrix lines are independent of the log values. Fig 1a shows the different positions of the clay point, related to the uncertainty of the neutron and density...

... a compensated density log. Rt can be obtained from either the BKZ (Russian lateral logs) suite or the induction log. With this data set, standard western techniques can be applied to obtain reservoir parameters. For seismic analysis, a compensated compressional acoustic urve can be replicated from the neutron...

... ABSTRACT In clastic environments, the density log is often found to be the most suitable log measurement for porosity prediction because total porosity can be determined directly from core calibration of the density tool response equation. Calibration values for rock matrix/grain density...

... to the offset vertical wells. The down facing densities measured relatively low density, as predicted by the model. However, the side facing density log gave far lower densities than predicted, and intermediate density tool positions confirmed that the measured density varied dramatically around the borehole...

... government sonic log Symposium Neutron log limestone lithology Porosity Log Quality Control density log carbonate reservoir reservoir well logging constant shift core porosity interpretation correlation coefficient SPWLA 35th Annual Logging Symposium, June 19-22,1994 POROSITY LOG QUALITY...

... diameter wireline tool real time system resolution Laterolog log analysis Samworth dipmeter Upstream Oil & Gas transit time requirement Symposium bpb wireline service correction equation compensation caliper density log electrode SPWLA 33rd Annual Logging Symposium, June 14-17, 1992...

... ABSTRACT Two high-resolution well logs may be used with core to improve estimates of porosity and permeability. The microresistivity log from the high-resolution dipmeter and the enhanced-resolution bulk density log can differentiate portions of core cemented with different minerals in gas...

... zone and uninvaded zone, can be evaluated. Analytical approaches were developed that are extensions of conventional log analysis methodologies. The analysis methodology requires as a minimum a common modern logging suite of a density log, a neutron log and an appropriate resistivity logging suite...