... polarization with mixing models, Maxwell-Wagner or geometrical effects, induced polarization (IP) from metallic particles, and doublelayer polarization on clay particles, Fig. 1. Fig. 2 Dielectric assumptions used by several service providers (Wang and Poppitt, 2013). Fig. 1 Polarization mechanisms...

... in the simulator. 4 SPWLA-2024-0039 SPWLA 65th Annual Logging Symposium, May 18 22, 2024 Decomposition of pretests Analysis of decomposition assumption The fact that measurements can be decomposed and used to predict outcomes of measurement setups never simulated stems from these three assumptions: The outcome...

... anisotropy of each layer assists petrophysicists in evaluating the quality of sand-shale lamination, distinguishing between water zones and low resistivity pay zones, and ultimately optimizing wellbore trajectories. Because of limitations in the existing UDAR inversion, a global anisotropy assumption, where...

... shale myer assumption reservoir characterization spwla-2024-0124 shale lamination figure 5 medium model ABSTRACT In thin-bedded shaly sand reservoirs, a Thomas-Stieber model is used to quantify volumes of clean sandstone and associated laminar, dispersed, and structural shales...

... sandstone log analysis geological subdiscipline lamination assumption segmentation laboratory triangle thomas-stieber triangle gamma ray endpoint SPWLA 64th Annual Logging Symposium, June 10-14, 2023 DOI: 10.30632/SPWLA-2023-0027 PHYSICS-BASED PERMEABILITY MODELS BASED ON THOMASSTIEBER PLOTS W...

... log analysis tphi porosity assumption upstream oil & gas water saturation pulsed neutron log well logging gas reservoir july 29 spwla 61 openhole log matrix saturation gas pressure reservoir characterization symposium equation alberto abouganem stephen reservoir pressure...

... in both their operational practicality and quality of core acquired. A common assumption is that the void space at surface was previously occupied by hydrocarbon that escaped the rock due to gas expansion; this statement will be tested. Is there any water loss from in-situ to lab conditions? Can whole...

... Reservoir Characterization log analysis complex reservoir shale gas mineral matrix machine learning downhole trend calculation Artificial Intelligence core measurement spwla 59 Symposium regression water saturation kerogen assumption absolute value free gas core data well...

... Upstream Oil & Gas Artificial Intelligence composition log analysis total porosity shale formation evaluation sandstone compaction silt sequence well logging facies porosity assumption evaluation Symposium silty facies spwla 58 Boomerang reservoir resistivity estimation...

... sample preparation, analytical technique, assumptions, and ultimately results. CORE SAMPLING AND METHODOLOGY The handling and preservation of samples plays a critical role in obtaining high quality data. We started with a list of desired analyses to define the sampling requirements and help ensure...

... triple porosity system Scenario well logging modeling assumption moduli fracture permeability equation SPWLA 56th Annual Logging Symposium, July 18-22, 2015 1 PETROPHYSICAL APPLICATIONS OF THE ELASTIC MODULI MODELING: SECONDARY POROSITY, SATURATION AND PERMEABILITY EVALUATION IN COMPLEX...

... mobility (md/cp). More recently, pressure buildup stability (psi/min) is being reported. This paper expands on these quality criterions and provides methods to quantify the results. Drawdown mobility. By making the assumption of pseudosteady state hemispherical flow, the drawdown mobility is determined...

... enough above the free water level. This paper seeks to lift the fog of confusion. log analysis particle porosity assumption saturation well logging Vclay spwla 55 shaley-sand trend Vshale shale mineralogy clay mineral Upstream Oil & Gas neutron density crossplot silt Symposium...

...-dependent slowness values. It is conceptually simple, being based on phase moveout and transit time across the receiver array calculated at specific discrete frequencies, coupled with novel phase unwrapping and alias correction. The approach is entirely data-driven, requiring no prior assumptions about...

... saturation diffusion pulsed neutron capture Badruzzaman Steam flood Engineering overestimation Symposium diffusion equation assumption saturation Berkeley equation SPWLA 51st Annual Logging Symposium, June 19-23, 2010 1 Accuracy of pulsed neutron capture Sigma-derived steam saturation...

... Simulation real time system Upstream Oil & Gas spwla 51 Probe assumption DST wpft tool Symposium FTWD tool SPWLA 51st Annual Logging Symposium, June 19-23, 2010 1 FORMATION TESTING GOES BACK TO THE FUTURE Mark Proett, David Welshans, Kris Sherrill, Jim Wilson, Jerry House, Ramez Shokeir...

...-water and Juhasz models. Unfortunately these new models have not relieved the confusion, but probably have compounded it. Both classes of "shaly sand" saturation equations are in wide use. A review of the assumptions that underlie any of the equations in both classes shows that there are fatal flaws...

... Artificial Intelligence Brine conductance geometry well logging clay coating surface conductance assumption log analysis specific surface conductance surface area electrical conductivity Symposium parallel resistor model rock clay mineral different value Upstream Oil & Gas...

... parameter inversion log analysis Hessian matrix assumption frequency dielectric assumption cost function algorithm resistivity Symposium attenuation measurement well logging ohmm procedure Haugland Forward Model apparent resistivity spwla 47 invasion SPWLA 47th Annual Logging...

... assumption spwla 46 gas-liquid flow production control Modeling & Simulation spinner revolution slip model production monitoring spinner multiphase spinner response model Symposium rotation rate holdup spinner average production logging spinner response model mass-fraction model new...