... characterization prediction geology log analysis geological subdiscipline geologist well logging machine learning hydraulic fracture geometry gamma ray log prediction ml model algorithm application poisson in-situ stress estimation fracture geometry interface workflow sonic log elastic property...

...-bearing intervals, especially when these intervals are thinner than the vertical resolution of the conventional resistivity tools. This study explains that combining conventional logging data (such as gamma ray, resistivity, density, and neutron data) with acoustic data (such as shear and compressional...

... & gas resistivity log analysis saturation lithology workflow presented gamma ray kerogen water saturation interpretation silt well 1 carbonate porosity pixel inversion hydrocarbon Introduction Low resistivity pay is a perennial challenge in clastic intervals of the Third Bone...

... tool, the logging program also included gamma ray, spectral gamma ray, neutron porosity, and density. This suite of tools supplied the measurements required to characterize the formation through the determination of mineralogy, porosity, and hydrocarbon saturation. The mineralogical model was based...

... for predicting elastic properties of rocks, including the P-wave velocity from measured petrophysical properties, namely porosity, mineralogy, and the pore fluid. However, the mineralogy input, such as the clay content, was missing in the well data. Therefore, the clay content was calculated from the gamma ray...

... logs. A complete workflow is presented covering: 1) utilization of reference logs, e.g., gamma ray, to correct image log depth using cross correlation and/or dynamic time warping, 2) automated identification of sidewall core cavity in borehole image log using the circle Hough transform, and 3...

... Abstract Azimuthal gamma ray (GR) logging-while-drilling (LWD) tools have demonstrated great value for geosteering applications in directional drilling. Their ability to indicate the relative stratigraphic position of the drilling assembly can determine whether the well should be steered up...

... shows that computer-based machine learning techniques can determine water saturation with a high precision and the developed correlation works extremely well in prediction mode. log analysis well logging machine learning Upstream Oil & Gas abdulraheem fn model gamma ray prediction...

... drilling, coring, and logging operations in future wells. log analysis orientation Upstream Oil & Gas borehole variation recovery porosity Artificial Intelligence shear gamma ray well logging reflection image shear slowness detailed description Formation Evaluation data...

... Abstract Today’s fast-paced development of petroleum resources depends on an efficient and accurate evaluation of both clastic and unconventional reservoirs. A new high-performance, slim logging-while-drilling (LWD) natural gamma ray spectroscopy tool has been developed to assist real-time...

... & Gas multiple linear regression sonic slowness mobility prediction bulk density correlation neutron porosity workflow petrophysical log regression porosity gamma ray shallow resistivity univariate linear regression resistivity permeability linear regression mobility Introduction...

... a pulsed neutron generator, and the resulting gamma rays are intercepted by a high resolution, state of the art, LaBr 3 (Ce) detector. In order to exclude background gamma rays and provide a clean capture spectrum, a boron coating has been placed on the housing. The 3.25-inch tool diameter makes the system...

... Abstract The determination of elemental concentrations, mineralogy and lithology is essential for the evaluation of unconventional plays. Several instruments utilizing D-T generator and gamma ray detectors have been developed to determine elemental weight fractions. The measured gamma ray...

... resolved in several wells with porosity as low as ≤ 5 PU. well logging field test repeatability polarization time log analysis resolution prepolarization porosity sensor frequency wireline sensor gamma ray application Upstream Oil & Gas reservoir organic reservoir acquisition...

... Abstract It is not uncommon to note discrepancies in natural gamma ray (NGR) data from different designs of gamma ray (GR) tools run in the same well. These discrepancies are often blamed on inaccurate primary or secondary calibrations of the tools; however, it can be shown that in many cases...

... Several surveillance techniques are available for GP evaluation. Among these are neutron porosity ( M.R. Neal 1982 ), Gamma-Gamma density ( M.R. Neal 1985 , F. Kevin 2000 ), pulsed neutron induced silicon activation ( J.R. Olesen 1989 ), natural gamma ray measurement for man-made ceramic gravel...

...-detector spacing for maximum accuracy. The tool design comprises a 14 MeV neutron source, two gamma ray detectors and two fast neutron detectors. Counts ratios are used to establish a linear relationship with formation bulk density. This design yields an accuracy of 0.0147 g/cm 3 in shale-free formations...

... best practices in the operator's FP designs. The proppant tracers were injected into the proppant slurries from the start of proppant addition until screen-out. In most cases, washpipe-deployed spectral gamma ray and gamma density logging tools were then pulled across the completion interval...

... (installed side by side) in a single skid was used for the first time in several KOC wells together with other locations in the world. Dual venturi-size setup enables flow metering of a wider range of flow rates and provides enhanced phase fraction measurements via full gamma-ray spectrum analysis. We...

... to accurately characterize the measurement for quantitative analysis. Advantages and limitations of this measurement while drilling (NGD) technique will be highlighted and illustrated in the paper. well logging rhob crossplot gamma ray Upstream Oil & Gas chemical source sandstone NGD measurement...