The porosity of a zone can be estimated either from a single “porosity log” (sonic, density, neutron, or magnetic resonance log) or a combination of porosity logs, in order to correct for variable lithology effects in complex reservoirs. In the carbonates, mineral mixtures are primarily drawn from calcite, dolomite, and quartz (either as sand grains or as chert); anhydrite and gypsum may also o...

The present study evaluates the effect of a substrate’s silicon content on coatings’ morphology, structure, and properties in an electrolyte containing sodium tungstate Al–xSi alloys. PEO-coated samples demonstrated structure pancake crater with irregular micro-cracks micro-pores. incorporation element W coatings decreased surface roughness porosity due to increasing conductivity and, hence, de...

The use of lasers has become increasingly common in the field Background of medicine and dentistry, and there is a growing need for a deeper understanding of the procedure and its effects on tissue. The aim of this study was to compare the erbium-doped yttrium aluminium garnet (Er:YAG) laser and conventional drilling techniques, by observing the effects on trabecular bone microarchitecture and ...

The primary goal of this study was to assess peripheral bone microarchitecture and strength in postmenopausal women with type 2 diabetes with fragility fractures (DMFx) and to compare them with postmenopausal women with type 2 diabetics without fractures (DM). Secondary goals were to assess differences in nondiabetic postmenopausal women with fragility fractures (Fx) and nondiabetic postmenopau...

Shale reservoir heterogeneity is strong, which seriously affects shale gas evaluation and reserves estimation. The Longmaxi Formation of the Luzhou block in southern Sichuan was taken as an example to characterize pore distribution over full scale using micro-computed tomography (CT), focusing on ion beam scanning electron microscopy (FIB-SEM) small-angle neutron scattering (SANS); further, exp...

Abstract Blended Palm Oil Fuel Ash (POFA) concrete has the potential for application in organic acid environments such as peat land. However, there is a need to improve resistance of blended POFA using silica fume pozzolanic material. There are limited studies admixed with exposure. In this study, compressive strength, porosity, and sorptivity been investigated by exposing samples water. Portla...

Recently, the mesoscale of cortical bone has been given particular attention in association with novel experimental techniques such as nanoindentation, micro-computed X-ray tomography and quantitative scanning acoustic microscopy (SAM). A need has emerged for reliable mathematical models to interpret the related microscopic and mesoscopic data in terms of effective elastic properties. In this w...

Quantitative prediction of petrophysical properties for reservoir rocks frequently employs representative microscopic models of the pore space as input. Recently digital imaging techniques such as microtomography have been used to provide void space images at the resolution of a few microns. However, this resolution may be insufficient to capture some smaller structures, particularly in carbona...

Abstract Optimization of all the process parameters for laser powder bed fusion (L-PBF), considering effects individual on Ti6Al4V fabricated parts, can be complex and challenging. Therefore, first time, three main variable (laser power, scan speed, hatch spacing) outcomes (surface roughness, bulk porosity, production rate parts) were studied in this work. Then, combination above-mentioned form...