... porosity by using theoretical and empirical equations. The suggested permeability models have been questionable in carbonates due to inherent heterogeneity and complex pore systems. The main objective of this paper is to provide a workflow to improve the use of existing models (e.g., Kozeny, Lucia...

... tools in this application also reduces well delivery times and costs. A comprehensive logging solution was required to drill the 6-in. reservoir section of a study well. The complex LWD string, consisting of gamma ray, resistivity, neutron porosity, azimuthal density, azimuthal sonic, and nuclear...

... of the Ensemble Randomized Maximum Likelihood (LM-EnRML). The workflow jointly estimates the petrophysical and geological model parameters and their uncertainties. This paper demonstrates joint estimation of layer-by-layer water saturation, porosity, and layer-boundary locations and inference of layers...

... government carbonate reservoir complex reservoir data mining china government machine learning knowledge evaluation classification flow in porous media reservoir porosity selection accuracy algorithm permeability calculation pore asia government artificial intelligence permeability...

... distributed in the host-rock area. Also, the lithologies are considered in distributing the fracture class because the rock mechanic properties and the number of fractures are strongly controlled by rock compositions. Once the fracture class is distributed, porosity, permeability, and water saturation...

... was conducted on all samples. Using pre- and post-test images, the damage could be identified, and petrophysical properties, including porosity and permeability, could be determined and directly compared with DRP results from control samples and available routine core analysis (RCA) results. DRP provides unique...

... 3 2022 2 8 2022 2 8 2022 Copyright 2022, Society of Petrophysicists & Well Log Analysts artificial intelligence realization bayesian inference machine learning porosity log analysis database upstream oil & gas well logging probability reservoir...

... on the degree of the development of secondary porosities and fractures. It is suggested that the granitic rocks with developed secondary porosities and fractures, as represented by the low density (DEN), high acoustic transit time (AT), and relatively high neutron porosity (NP) log facies (LF 3), have the best...

...Tianmin Jiang; Ron J. M. Bonnie; Thiago Simoes Correa; Martin C. Krueger; Shaina A. Kelly; Matt S. Wasson A novel interpretation workflow was developed using an automated unsupervised learning algorithm on nuclear magnetic resonance (NMR) T 1 - T 2 log data to quantify fluid-filled porosity...

... to complex carbonate rocks in which permeability is often less correlated to porosity, irreducible water saturation, and relaxation times. This study develops and evaluates perm-estimators that use multiple relaxation times, proving that they are a general case of the classical models. The so-called...

... profile porosity core sample petrophysics june 2022 flow in porous media complex reservoir nmr signal veselinovic pulse sequence international symposium PETROPHYSICS, VOL. 63, NO. 3 (JUNE 2022); PAGES 454 484; 35 FIGURES; 1 TABLE. DOI:10.30632/PJV63N3-2022a11 Review of Recent Developments...

...Holger Thern; Artur Kotwicki; Nicklas Ritzmann; Jon Torkel Petersen; Oliver Mohnke The presence of gas in hydrocarbon reservoirs has a distinct effect on commonly used porosity logging measurements such as density, neutron, and nuclear magnetic resonance (NMR). Although the effect of gas on NMR...

... parameters for best fit according to each method for permeability modeling of clay-rich carbonate in the Danish North Sea Valdemar area. well logging reservoir characterization flow in porous media log analysis fluid dynamics porosity surface relaxivity upper tuxen permeability middle tuxen...

... physics model appeared best suited among different available rock physics models, depending on the clay volume and porosity in our study area. Using input from a robust multimineral petrophysical evaluation and rock physics modeling, the finalized model is propagated to test wells for predicting...

... indicated shaly sand or thin sands. Resistivity and thermal neutron porosity logs were highly affected by the shale clasts. For this reason, a fractional net/gross interpretation technique was used to evaluate the sand content and hydrocarbon pore volume. To further verify these results, they were compared...

... analysis flow in porous media drilling operation geopilot well exploration appraisal well drilling fluid chemistry drilling fluid selection and formulation drilling fluid property drilling fluid formulation petrophysics december 2021 porosity well logging drilling fluids and materials plug...

... over 597 ft. Additionally, data from several offset wells were used, containing sidewall cores and complete sets of electrical logs. This allowed the development of rock-calibrated mineral models, adjusting the clay volume with X-ray diffraction data, porosity, and permeability with core measurements...

... shown to have a high potential of replicating physiochemical properties of natural materials for geoengineering applications. Consistent porosity is critical for 3D-printed samples used in rock testing since homogeneity between samples would provide unlimited capabilities in a laboratory setting. Binder...

... of the pore network model images. Students conducted the analysis through an open-source image analysis software (Fiji) to help explore and better understand fundamental petrophysical properties: porosity, fluid saturation, wettability, grain-size distribution, and displacement efficiency. A survey was given...

... that the coefficient of determination for cementation exponent m and fractal dimension is 0.869, while between m and porosity, and succolarity, it is 0.784 and 0.781, respectively. This indicates that the fractal dimension and cementation exponent describe the complexity of pores. The coefficient of determination...