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Keywords: resistivity
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Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0001
... Abstract Archie developed his model based upon trends observed in formation resistivity factor - porosity and resistivity index-water saturation plots. The trends appear when the data is plotted on log-log graph paper. The trends are apparently straight lines on log-log paper, which means...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0022
... Abstract Oilfield exploration and production drilling companies commonly use Logging-While-Drilling (LWD) measurements provided by propagation-resistivity tools. These tools emit radio waves at frequencies from 400 kHz to 2 MHz and measure signal attenuation and phase shift between receiver...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0023
... Abstract Real-time mapping of sedimentary formations, detection of structural anomalies and evaluation of formation properties can be achieved through logging while drilling (LWD) resistivity inversion. We present the physics-based framework that relies on the predictor-corrector methodology...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0024
... Abstract Extra deep azimuthal resistivity (EDAR) measurements are widely used for proactive geosteering and reservoir mapping. Real-time decisions are usually supported with data inversion results and uncertainty quantification based on 1D layer-cake models. A richer 2D model is required...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0030
... artificial intelligence drilling fluid formulation annual logging symposium spwla-2022-0030 reservoir university overbalance pressure sensitivity analysis invasion exposure time resistivity gas saturation barik reservoir rd annual logging symposium permeability Abstract The process...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0035
.... This is a generalization of the conventional Thomas-Stieber model. Principal Component Analysis (PCA) was used to cluster the data, allowing the impact of clays and their occurrence to be assessed. The density, resistivity, acoustic, and gamma ray logs are employed for this analysis. The model is used to iteratively...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0038
... Abstract Resistivity log is used to measure the formation resistivity from which the water saturation is estimated. Because of the spatial resolution, the log resistivity R app (the apparent resistivity) is not the true formation resistivity when the bed is thin and/or the bed is neighbored...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0045
... Abstract With the introduction of Ultra-deep azimuthal resistivity (UDAR) logging while drilling (LWD) tools towards the beginning of the last decade, the Oil and Gas industry went from real time mapping of formation boundaries a few meters from the wellbore to tens of meters away...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0047
... drilling measurement logging while drilling structural geology drilling data acquisition lwd upstream oil & gas reservoir characterization well logging drilling operation real time system logging symposium receiver percentile interpretation inversion tvd resistivity rd...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0049
... Abstract Over the past few years, ultra-deep electromagnetic (EM) resistivity tools have been primarily used to enable proactive geosteering and reservoir mapping. The ability to detect formation properties with a depth of investigation from 25 to 225 ft away from a wellbore enables...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0050
... still be challenging to obtain an accurate resistivity formation profile in complex scenarios such as multilayered geological structures. This is particularly evident in in high-angle and horizontal (HA/HZ) wells drilled in thin-laminated formations. This paper will present a newly developed LWD mapping...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0052
... Abstract Ultra-deep ElectroMagnetic (EM) inversion is used to resolve multiple layers far from the wellbore. Since it primarily responds to resistivity variations, shale and water bearing sand layers of similar resistivity values can't be resolved using a traditional resistivity inversion...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0057
... if the as-acquired deep resistivity is used in volumetric calculations. Overbalanced drilling causes deep invasion of waterbased mud (WBM) filtrate into porous and permeable rocks, leading to radial displacement of in-situ saturating fluids away from the wellbore. In low-porosity reservoirs drilled with WBM...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0076
... and/or shalyness does not fit nicely with the distance-to-boundary or DTB inversion model of step-variation in resistivity. In this pilot study, the service company provided a complete set of azimuth propagation resistivity logs for boundary-detection purpose. Therefore, the contribution of information content...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0102
... reservoirs are underlying thick clastic successions from Triassic to Quaternary. Recently, a modern oil-based mud resistivity imaging log with ultra-high-resolution was run in two appraisal wells with the aim to understand the complex fracture network in these basement rocks (in off-set wells: biotite...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0119
... reservoir characterization well logging drilling data acquisition log analysis drilling measurement logging while drilling structural geology logging symposium inversion lwd upstream oil & gas spwla 63 resistivity em inversion clegg well path university reservoir simulation...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0122
... SPWLA-2022-0122 SPWLA 54th Annual Logging Symposium, June 22-26, 2013 in newly drilled wells, are encountered at either a very low salinity or an altered water salinity making it difficult for conventional resistivity logs to consistently differentiate between oil and water bearing zones. Mineralogy...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0009
... selection and formulation drilling fluid property fluid loss control drilling fluid formulation frequency well logging hydraulic fracturing directional drilling borehole imaging orientation drilling fluid chemistry log analysis shale gas complex reservoir spwla-2021-0009 resistivity borehole...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0019
... parallel to the well trajectory, which was previously impossible to map accurately. This new approach utilizes a new class of deep directional resistivity measurements acquired by a reservoir mapping-while-drilling tool. The deep directional resistivity measurements are input to a newly devised inversion...
Proceedings Papers

Paper presented at the SPWLA 62nd Annual Logging Symposium, May 17–20, 2021
Paper Number: SPWLA-2021-0006
.... The logging program included triaxial resistivity, nuclear spectroscopy, electrical images, nuclear magnetic resonance (NMR) complementing triple combo, followed by formation pressure measurements, and fluid sampling. The presence of clay minerals in varying amounts within the reservoirs depresses...

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