... permeability geology artificial intelligence stratigraphy porosity dielectric dispersion logging fluid dynamics flow in porous media log analysis machine learning textural parameter geologist bayesian inference geomechanics thin-layered reservoir geological subdiscipline transport theory...

... properties such as single permeability, porosity, and relative permeability depend critically on the geometry of the void space. The size, shape, and connectivity of the pore space can affect the transport properties more strongly than the total void fraction available to transmit the flow. More than 50...

... mudrock log analysis reservoir characterization drilling data acquisition well logging porosity boundary drilling measurement scenario characterizing thin-bed response insight petrophysics lwd nmr tool tank water tank experiment experiment mudstone horizontal well annual logging...

... dynamic time warping (RDDTW), which is used to extract and fuse the shape and trend information between the core and the log porosity curve to realize adaptive depth matching. In addition, the method includes a new weight function, called excessive warping regularized function (EWRF), which is proposed...

... in key wells that incorporate expert knowledge, depth-matched core porosity with log-calculated porosity, interpolated triple-combo well logs to core depth, and performed feature engineering on the resulting data suite. To generate latent-space well logs, dimensionality reduction techniques were...

... liu dean-stark saturation porosity doi PETROPHYSICS, VOL. 65, NO. 5 (OCTOBER 2024); PAGES 682 698; 15 FIGURES, 2 TABLES. DOI:10.30632/PJV65N5-2024a2 A Method for Reconstructing In-Situ Saturation Based on Dean-Stark Saturation Measured in Laboratory Jiansheng Zhang1, Sainan Xu1, Yunlong Lu1, Yi...

... porosity, creating pathways for fluid flow and cementation, filling the pores through mineral precipitation. The complexity of this carbonate porous system is revealed in its textural aspects. Rezende (2015) shows the tendency for digitate stromatolites to grow with complex vertically oriented shapes...

... designed to account for shale/clay were developed for specific scenarios, like the Indonesian equation (Poupon and Leveaux, 1971) (Eq. 1) historically used for the onshore fields of Suriname. , (1) where Sw = water saturation (v/v); Vcl = clay volume (v/v); Rcl = clay resistivity m); e = effective porosity...

... injections. When a new production well is drilled, there is always a question of whether it encounters any injection gas, whether there is a change in GOR indicated by four-dimensional (4D) seismic gas effects, or simply whether we can trust the computation of higher porosity in sands than initially expected...

...) pulse sequence on a 12-MHz NMR instrument. The acquired 2D data were inverted using an optimized inversion software, MUPen2D. We then obtain oil and water content in the plug from the 2D T 1 - T 2 NMR using an in-house-developed NMR MATLAB app. The porosity of all the plugs was measured using a combined...

... but are scarce in old wells. Decades of research have given good algorithms for defining wet clay porosity from resistivity logs, but inverting those for porosity and tortuosity remains challenging. Another log-derived parameter is a formation’s homogeneity, which quantifies the jaggedness of a logging curve...

... reservoir drillstem/well testing qixia formation rock type artificial intelligence hydraulic fracturing reservoir characterization fluid dynamics structural geology sedimentology sedimentary geology sedimentary rock carbonate rock drillstem testing sichuan basin facies porosity geological...

... characterization mwd doi strength drilling operation porosity concentration drilling data acquisition machine learning new workflow permeability prediction payne accuracy regressor PETROPHYSICS, VOL. 65, NO. 2 (APRIL 2024); PAGES 215 232; 11 FIGURES, 4 TABLES. DOI:10.30632/PJV65N2-2024a5 A New...

... permeability data. Accurate digital and physical description of capillary pressure and relative permeability in the high-porosity chalk is complicated by both low permeabilities and heterogeneity. The main challenge with chalk is that flow occurs in a nano-environment. Physically, the nano-environment...

..., and traditional binarization method. The problem of low accuracy of the traditional pore identification method is solved. The porosity of SEM images of high-maturity shale calculated by the pore-net network model is between 12 and 19% deviation from the experimental data. The calculated porosity of the SEM image...

... and models for estimation of porosity, irreducible water, permeability, pore structure, and oil saturation are included. The aim of this paper is to try to standardize general NMR experiments for rock core analysis. 12 8 2023 1 1 2024 15 1 2024 15 4 2024 15 4 2024 Copyright...

... consideration porosity permeability wirr integration society petroleum engineer saline aquifer application PETROPHYSICS, VOL. 65, NO. 1 (FEBRUARY 2024); PAGES 51 69; 11 FIGURES, 5 TABLES. DOI:10.30632/PJV65N1-2024a3 Petrophysical Considerations for CO2 Capture and Storage Munish Kumar1,2 and Gabriel...

...Li Yu; Haonan Li; Yue Wu; Weihao Wang; Xinyuan Zhang; Yongchuan Zhao In this paper, through the permeability test of granite under different temperature cycles, the change law of porosity and permeability of rock samples after different temperature cycles was studied, and the relationship between...

..., the Petrophysical Data-Driven Analytics Special Interest Group (PDDA SIG) of the Society of Petrophysicists and Well Log Analysts (SPWLA) hosted a machine-learning contest aiming to develop data-driven models for estimating reservoir properties, including shale volume, porosity, and fluid saturation, based...

... of which principal components should be retained for a given problem. 15 9 2023 20 10 2023 25 10 2023 2 2 2024 2 2 2024 Copyright 2024, Society of Petrophysicists & Well Log Analysts upstream oil & gas europe government log analysis solution porosity...