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 processes of shale gas transport and enrichment are closely related to the micro-fractures structure. Here, porosity, permeability test, adsorption, scanning electron microscopy (SEM), fluid spontaneous imbibition, Nano-CT, Micro-CT, core observations were used determine types characteristics in Longmaxi shales, Jiaoshiba area. effects on reservoir properties accumulation also analyzed. Div...

Abstract The adequate modeling of the micro/nano arc resonators' dynamics is vital for their successful implementation. Here, a size-dependent model, wherein material structure, porosity, and micro-rotation effects grains are considered, derived by combining couple stress theory, multi-phase classical Euler–Bernoulli beam aiming to characterize frequency tunability resonators as monitoring eith...

In this research, Cr2O3 ceramic nano-sized powder particles were prepared using ball milling and then granulated to reach the proper size for spraying. Afterward, nano-coatings deposited by atmospheric plasma spraying (APS) process onto stainless steel substrates. To optimize APS parameters, was carried out under six conditions with different parameters. Microstructures of elemental/milled coat...

Building materials showed remarkable progress, as many methods were used to enhance their properties, such nanomaterials which have played a major role in this field. This research reveals the complex integration of nano-zirconi (NZrO2-5wt%YPSZ). with concrete and its effect on different mechanical properties. The main objective is reduce porosity by adding doses nano-zirconia mixture microstru...

Transparent polycrystalline ceramics exhibit improved mechanical and optical properties. However, synthesizing transparent without additives is nontrivial. Herein, we report the synthesis of two (β-Si3N4 γ-Si3N4) under high pressure temperature from a pure Si3N4 precursor with nano-/micro-dual grain sizes. Synthesized β-Si3N4 exhibited significantly enhanced Vickers hardness reaching 24.2 GPa (...