scholarly journals Microscopic Residual Oil Distribution Characteristics and Quantitative Characterization of Producing Degree Based on Core Fluorescence Analysis Technology

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Huifen Xia ◽  
Lihui Wang ◽  
Peihui Han ◽  
Ruibo Cao ◽  
Siqi Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Fluorescence Analysis ◽  
Pore Surface ◽  
Distribution Characteristics ◽  
Residual Oil ◽  
Quantitative Characterization ◽  
Adsorption State ◽  
The Core ◽  
Oil Water

In this study, to address the insufficiency of research on the distribution characteristics and quantitative characterization of oil, water, and rock in a reservoir, laser confocal and core fluorescence analysis techniques are combined with core flooding experiments to investigate oil–water distribution characteristics in the core and the microscopic origin of residual oil. The results obtained show that the three-dimensional (3D) distribution characteristics of oil, water, and rock can be depicted using a laser confocal technique. Free and bound states are dominated by water flooding, and their total proportion is 93.65%, while the semibound state only accounts for 6.35% of the total. Polymer flooding has clear effects such as production of cluster-like residual oil, interparticle adsorption state residual oil, pore surface oil film, and corner residual oil. After alkali-surfactant-polymer (ASP) flooding, the residual oil produced at the lowest degree corresponds to particle adsorption oil, pore surface oil films, and interparticle adsorption state residual oil. The emulsion transition process in porous media, i.e., Winsor I→Winsor III→Winsor II, is studied. Moreover, the fluorescence analysis technology is used to clarify the causes for residual oil production, namely, pore structure, crude oil viscosity, the Jia Min effect, particle migration, and adsorption capacity. The combination of laser confocal and fluorescence analysis technology can help realize the three-dimensional reconstruction of the fluid in the core, and it can quantitatively characterize the microscopic residual oil. According to the analysis results, it can also guide the formulation and adjustment of oilfield development plans.

scholarly journals Synthesis and structural characterization of hexa-μ2-chlorido-μ4-oxido-tetrakis{[4-(phenylethynyl)pyridine-κN]copper(II)} dichloromethane monosolvate

2021 ◽  
Vol 77 (1) ◽  
pp. 42-46
Author(s):  
Rayya A. Al Balushi ◽  
Muhammad S. Khan ◽  
Md. Serajul Haque Faizi ◽  
Ashanul Haque ◽  
Kieran Molloy ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Structural Characterization ◽  
Title Compound ◽  
Three Dimensional ◽  
Hirshfeld Surface ◽  
The Core ◽  
Dimensional Network ◽  
Packing Arrangement

In the crystal structure of the title compound, [Cu4Cl6O(C13H9N)4]·CH2Cl2, the core molecular structure consists of a Cu4 tetrahedron with a central interstitial O atom. Each edge of the Cu4 tetrahedron is bridged by a chlorido ligand. Each copper(II) cation is coordinated to the central O atom, two chlorido ligands and one N atom of the 4-phenylethynylpyridine ligand. In the crystal, the molecules are linked by intermolecular C—H...Cl interactions. Furthermore, C—H...π and π–π interactions also connect the molecules, forming a three-dimensional network. Hirshfeld surface analysis indicates that the most important contributions for the packing arrangement are from H...H and C...H/H...C interactions.

scholarly journals Characterization of the translocon of the outer envelope of chloroplasts

2003 ◽  
Vol 160 (4) ◽  
pp. 541-551 ◽  
Author(s):  
Enrico Schleiff ◽  
Jürgen Soll ◽  
Michael Küchler ◽  
Werner Kühlbrandt ◽  
Roswitha Harrer
Keyword(s):  
Three Dimensional ◽  
Dependent Manner ◽  
Interior Structure ◽  
Two Dimensional ◽  
Outer Envelope ◽  
Core Complex ◽  
The Core ◽  
Precursor Proteins ◽  
Stable Core

The protein translocon of the outer envelope of chloroplasts (Toc) consists of the core subunits Toc159, Toc75, and Toc34. To investigate the molecular structure, the core complex was purified. This core complex has an apparent molecular mass of ∼500 kD and a molecular stoichiometry of 1:4:4–5 between Toc159, Toc75, and Toc34. The isolated translocon recognizes both transit sequences and precursor proteins in a GTP-dependent manner, suggesting its functional integrity. The complex is embedded by the lipids phosphatidylcholine and digalactosyldiacylglyceride. Two-dimensional structural analysis by EM revealed roughly circular particles consistent with the formation of a stable core complex. The particles show a diameter of ∼130 Å with a solid ring and a less dense interior structure. A three-dimensional map obtained by random conical tilt reconstruction of electron micrographs suggests that a “finger”-like central region separates four curved translocation channels within one complex.

A Direct and Quantitative Three-Dimensional Reconstruction of the Internal Structure of Disordered Mesoporous Carbon with Tailored Pore Size

2013 ◽  
Vol 19 (3) ◽  
pp. 745-750 ◽  
Author(s):  
Juan Balach ◽  
Flavio Soldera ◽  
Diego F. Acevedo ◽  
Frank Mücklich ◽  
César A. Barbero
Keyword(s):  
Pore Size ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Three Dimensional ◽  
Quantitative Characterization ◽  
Resorcinol Formaldehyde ◽  
Dual Beam ◽  
Dimensional Reconstruction ◽  
A New Technique

AbstractA new technique that allows direct three-dimensional (3D) investigations of mesopores in carbon materials and quantitative characterization of their physical properties is reported. Focused ion beam nanotomography (FIB-nt) is performed by a serial sectioning procedure with a dual beam FIB-scanning electron microscopy instrument. Mesoporous carbons (MPCs) with tailored mesopore size are produced by carbonization of resorcinol-formaldehyde gels in the presence of a cationic surfactant as a pore stabilizer. A visual 3D morphology representation of disordered porous carbon is shown. Pore size distribution of MPCs is determined by the FIB-nt technique and nitrogen sorption isotherm methods to compare both results. The obtained MPCs exhibit pore sizes of 4.7, 7.2, and 18.3 nm, and a specific surface area of ca. 560 m2/g.

scholarly journals OSCAR: a framework to identify and quantify cells in densely packed three-dimensional biological samples

2021 ◽  
Author(s):  
Mario ledesma-terron ◽  
Diego perez-dones ◽  
david G Miguez
Keyword(s):  
Biological Samples ◽  
Object Segmentation ◽  
Three Dimensional ◽  
Cell Types ◽  
Biological Tissues ◽  
Nuclear Marker ◽  
Quantitative Characterization ◽  
3D Space ◽  
Immunofluorescence Labeling

We have developed an Object Segmentation, Counter and Analysis Resource (OSCAR) that is designed specifically to quantify densely packed biological samples with reduced signal-to-background ratio. OSCAR uses as input three dimensional images reconstructed from confocal 2D sections stained with dies such as nuclear marker and immunofluorescence labeling against specific antibodies to distinguish the cell types of interest. Taking advantage of a combination of arithmetic, geometric and statistical algorithms, OSCAR is able to reconstruct the objects in the 3D space bypassing segmentation errors due to the typical reduced signal to noise ration of biological tissues imaged in toto. When applied to the zebrafish developing retina, OSCAR is able to locate and identify the fate of each nuclei as a cycling progenitor or a terminally differentiated cell, providing a quantitative characterization of the dynamics of the developing vertebrate retina in space and time with unprecedented accuracy.

Three-Dimensional Structure Modeling in Tuo128 Block of Shengtuo Oilfield

2012 ◽  
Vol 249-250 ◽  
pp. 563-566 ◽  
Author(s):  
Hong Bing Zhao ◽  
Xue Li ◽  
Feng Hua Wang ◽  
Yong Bei Cui
Keyword(s):  
Three Dimensional ◽  
Dimensional Structure ◽  
Structure Modeling ◽  
Geological Modeling ◽  
Reservoir Model ◽  
Quantitative Characterization ◽  
Three Dimensional Structure ◽  
Modeling Techniques ◽  
Reservoir Description

Three-dimensional geological modeling techniques, developed from 1980s, is a new geological technology used to make reservoir fine description and geological characterization with the combination of seismic, geological and reservoir exploration and development based on geostatistics. Three-dimensional geological modeling can achieve the quantitative characterization of the reservoir and heterogeneity of various scales. So far, it has been the most important content of reservoir description, what’s more, three-dimensional structure modeling can improve the accuracy and reliability of fine reservoir description through the establishment of three-dimensional reservoir model, the quantitative distribution of three-dimensional reservoir parameters and geometry.

scholarly journals QUANTITATIVE CHARACTERIZATION OF THREE-DIMENSIONAL GRAIN SHAPES BY X-RAY MICRO CT AT SPRING-8

2014 ◽  
Vol 70 (2) ◽  
pp. 265-274 ◽  
Author(s):  
Jun KATAGIRI ◽  
Takashi MATSUSHIMA ◽  
Hidetaka SAOMOTO ◽  
Mori UTSUNO ◽  
Yasuo YAMADA
Keyword(s):  
Three Dimensional ◽  
Micro Ct ◽  
Quantitative Characterization ◽  
X Ray
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