Results 51 to 60 of about 1,842 (227)
Journal of Petroleum Geology, EarlyView.ABSTRACT The diagenetic albitization of plagioclase and K‐feldspar grains is a transformative process that significantly alters sandstone's detrital composition and formation water chemistry, impacting reservoir quality. In this study, Eocene turbidite sandstones from the offshore Espírito Santo Basin, Brazil, were investigated to elucidate the role of
Eveline E. Zambonato +2 more
wiley +1 more source
Analyzing Porosity using Petrographic Imaging Methods: Key for Petrophysics [PDF]
, 2014 The porosity in rock can be quantified and characterized using a variety of direct methods including imbibition methods, mercury injection, gas expansion, petrography, X-ray tomography, and image analysis.
Mcdaniel, Kathleen
core
Meteoritics &Planetary Science, EarlyView.Abstract We report new results from a study of shock‐related features in the L6 ordinary chondrites Northwest Africa (NWA) 4672 and NWA 12841. Our observations confirm the occurrence of eight high‐pressure (HP) minerals in each meteorite, namely, ringwoodite, majorite, akimotoite, wadsleyite, albitic jadeite, lingunite, tuite, and xieite.
I. Baziotis +5 more
wiley +1 more source
Terra Nova, EarlyView.ABSTRACT Significant porosity of more than 5% was found at depths of more than 8500 m in poorly sorted, calcareous mudstones of the Malmian Mikulov Formation. These overpressured rocks are the main hydrocarbon source rock in the Vienna Basin. Core samples from present‐day depths of 8150 m to 8550 m were analysed using X‐ray diffraction and scanning ...
Susanne Gier +3 more
wiley +1 more source
Spatially resolved 23Na magnetic resonance dispersion measurement in porous media
The Canadian Journal of Chemical Engineering, Volume 104, Issue 8, Page 4135-4150, August 2026.Quantitative 23Na MRI was employed to analyze dispersion in realistic core plug samples and was compared with the conventional breakthrough curve. 23Na MRI provided a more effective aassessment of core plug heterogeneity than the conventional method. Abstract Tracer tests are widely used in the petroleum industry to assess reservoir core plugs, relying
Rheya Rajeev +5 more
wiley +1 more source
Theoretical advancements in operational petrophysics for enhanced reservoir surveillance
Operational petrophysics has significantly evolved through theoretical advancements, enhancing the accuracy and efficiency of reservoir surveillance. This review paper explores the foundational concepts of petrophysics, including key parameters such as ...
Henry Oziegbe Iriogbe +2 more
core +2 more sources
Petrophysical evaluation of sandstone reservoir of well E-AH1, E-BW1 and E-L1 Central Bredasdorp Basin, offshore South Africa [PDF]
, 2014 Magister Scientiae - MScThe Bredasdorp basin is a sub-basin of the greater Outeniqua basin. It is located off the south coast, Southeast of Cape Town, South Africa.
Magoba, Moses
core
Modeling of Characteristics of Complex Microstructure and Heterogeneity at the Core Scale
Applied SciencesComplex pore structures and strong matrix heterogeneity distinguish carbonate rocks, but there is a lack of comprehensive methods to describe these characteristics. In this study, a integrated approach is proposed to improve the accuracy and adaptability
Yiwei Chen, Pingchuan Dong
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.Abstract Enhanced geothermal systems rely on increasing permeability and pore surface area in rock. Cyclic thermal shocking can achieve both by inducing thermal cracks through repeated rapid cooling. Laboratory experiments subjected micritic limestone, granodiorite, and trachybasalt to up to 10 thermal shock cycles, while tracking crack evolution ...
M. G. Malenda, T. Vanorio
wiley +1 more source
GeoHazardsA very common hazard in Rwanda is represented by the instability of steep road cut slopes in lateritic soil. In its natural state, this material appears as a fine-grained weak and altered rock, generally in unsaturated conditions.
Roberto Valentino +2 more
doaj +1 more source