In tight oil reservoirs, nanopore throat acting as the narrowest section of fluidic channel determines transport performance; injecting CO₂ is found to significantly promote flow.

Stimuli-responsive self-assembly is playing an increasingly important role in emerging applications, ranging from smart materials to biosensors. However, obtaining essential information for further development, such as molecular arrangement and interaction, still experimentally challenging. A molecular-level understanding of the stimuli-responsive needed. Azobenzene-containing (azo-containing) amphiphiles organize into photo-responsive assemblies because cis–trans isomerization triggered by...

In this work, molecular dynamics simulations were employed to investigate the influence of inhibitor concentration on inhibition performance. The adsorption configuration, process, and performance studied. We found that an ordered self-assembled film can form a metal surface, which plays key role in corrosion inhibition. When reaches critical value, molecules organize into micelle aqueous solution. Further increasing did not change so efficiency remained at constant level. Our analyses...

Inhibition mechanism of three purine compounds, adenine (A), 2-amino-6-thiol-9H-purine (B) and 2,6-dithiol-9H-purine (C), was investigated by quantum chemical calculation molecular dynamic simulation. The reactivity studied calculation, the distribution highest occupied orbital (HOMO), lowest unoccupied (LUMO), energy gap between HOMO LUMO Fukui index were proposed to describe active sites molecules, inferred inhibition efficiency followed order A < B C. Furthermore, adsorption behaviour...

A vesicle was formed by disk-like bilayer curling.

The morphology library of block copolymer (BCP) self-assemblies is limited, especially as far tubular structures are concerned. Here, the clews tubules discovered for first time by self-assembly P4VP-b-PS BCPs with both high asymmetry and very molecular weight, which successfully expands BCP self-assemblies.

Hybrid surfactants containing both fluorocarbon (FC) and hydrocarbon (HC) chains, as effective CO2-philic surfactants, could improve the solubility of polar substances in supercritical CO2. Varying length HC hybrid is an way to CO2-philicity. In this paper, we have investigated effects on self-assembly process CO2-philicity (F7Hn, n = 1, 4, 7 10) water/CO2 mixtures using molecular dynamics simulations. It found that time F7Hn exhibits a maximum when equal FC (F7H7). case, investigation...

Controlling the self-assembly and polymorphic transition of surfactants is a challenging but meaningful topic for chemists materials scientists, which significant preparation advanced nanomaterials. We presented coarse-grained (CG) molecular dynamics (MD) simulations on confined within carbon nanotube (CNT) arrays. Under effect confinement, an intriguing "rod-double helix-hexagon-worm" was observed with varying size confining space. The also showed that confinement CNT arrays does not break...

SUMMARY Geophysical exploration technologies are developed not only to detect and quantify the geofluid in a reservoir but also with expectation identify reservoir's permeability that determines its exploitability. However, knowledge about whether there is geophysically invertible pore parameter of rock, key geophysical identification permeability, remains poorly understood. We address this gap by establishing, through dedicated laboratory measurements theoretical modelling, correlations...

Fractures widely exist in rocks and joint interpretation of elastic electrical survey data can improve the characterization fractured rocks. However, cross-property relationship between rock properties, which is key to successful elastic-electrical interpretation, remains poorly understood with varying pore pressure. This knowledge gap was by developing a method for making calcite-cemented sandstones penny-shaped fractures simultaneously measuring anisotropic properties artificial without as...

The loess plateau in northwestern China with an area of 640000 km², which has developed the deposits a thickness up to 200 m typical areas, is regarded as huge carbon stock like karst southwestern China, and plays important role regional (even global) cycle. But spring discharging from poorly known compared so far. objective this study ascertain characteristics origin at Qiushe Village, Lingtai County, Gansu Province by hydro-chemical isotopic methods. results show that springs...

A novel method is provided to build a coarse-grained model for water/oil/solid system.

Tuning the self-assembly of building blocks to obtain a kaleidoscope nanostructures is very important and challenging for preparation advanced nanomaterials. Amphiphiles confined within carbon nanotube (CNT) arrays can self-assemble into complex structures that maintain "bilayer" characteristic lamellar phase, we call them "lamellar phase variants (LPVs)". In this work, carried out coarse-grained molecular dynamics (MD) studies uncover novel LPVs. By varying pattern CNT array, obtained...

to interpret small faults is always the core question for seismic exploration.Seismic attributes can help us understand fault and fracture system better.The earthquake frequency controls resolution, if resolution relatively low, minor or micro-fractures portrayed through property body may not match reality.High means high easier distinguish faults.In order identify better, we make a simple raw data processing extract part of seismic.While using attribute technology, improved ant-tracking...

Analysis of three-dimensional acoustic data is a very important step in object detection, especially robotic detection. It provides rich information classification on the region interest. In this study, an approach displaying multispectral imaging (MSAI) was proposed based neural network called Self-Organizing Maps (SOM), which effectively realized dimensional reduction high-dimensional data. The obtained from example that rigid surface with 9 different holes illuminated by sound waves...

Calcite cement is widely existing in sandstones and can significantly affect the elastic electrical properties of sandstones. Accordingly, understanding effects calcite on rock key importance for accurate characterization sandstone reservoirs through seismic electromagnetic surveys. To obtain such knowledge, we design implement dedicated laboratory experiments to investigate porosity P- S-wave velocities resistivity synthetic calcite-cemented made using a new recipe. The experimental results...

Understanding the correlations between elastic and electrical properties of various types rocks is key to successful joint interpretation seismic electromagnetic survey data provide petrophysical parameters better assess subsurface earth. However, pressure-dependent elastic-electrical calcite-cemented sandstones remain poorly understood, even though such are widely distributed in nature all experiencing pressures. To obtain knowledge, a new method has been developed for manufacture...