A petroleum fluid can be di®ided into three types of species: asphaltenes, resins, and oils. Asphaltenes and resins are polar, while the rest of the so-called oils are either nonpolar or mildly polar. The interaction among these species strongly affect asphaltene precipitation from petroleum fluids. Different measuring methods for asphaltenes in a petroleum fluid gi®e similar results, but diffe...

It is often presumed that fine-scale surface pores and roughness in reservoir rock remain water-wet. To test this assumption, deposition tendency of asphaltenes and resins during crude oil aging of brine-filled pores was investigated. Model frameworks of water-wet silica with sub-micron pores were synthesized as planar films of thickness 5 μm. These pore networks were conditioned in brine, subm...

This study deals with the transport behavior of the coarse-sediment at Masudagawa flood mitigation dam (FMD), Japan. Radio frequency identification system (RFID) was used to trace the displacement of the IC tagged particles following major flood events since June 2011. Through this, the relationship between recovery rate of the tagged particles and distribution of shear stress over the FMD bed ...

At present, the regeneration agent with mineral oil as main component is widely used. However, its strong volatility, nonrenewability, and other shortcomings restrict development of technology. In this study, waste vegetable was used to prepare regenerated aging asphalt. The change in microstructure asphalt explored content time. results showed that addition could effectively supplement content...

Asphaltene are large molecular crude constituents and their existence is related to numerous problems. However, nanofluids have proven be a very stable effective way of dealing with asphaltene agglomerations. This research addresses the effectiveness as compared traditional available (FLOW-X) commercial inhibitors. The synthesis characterization two green NPs preparation were performed successf...

Global inputs of NO(x) are dominated by fossil fuel combustion from both stationary and vehicular sources and far exceed natural NO(x) sources. However, elucidating NO(x) sources to any given location remains a difficult challenge, despite the need for this information to develop sound regulatory and mitigation strategies. We present results from a regional-scale study of nitrogen isotopes (del...