Results 71 to 80 of about 21,307 (276)

Study of asphaltene dispersion and removal for high-asphaltene oil wells [PDF]

Petroleum Science, 2012
Many wellbores are blocked by asphaltene deposits, which lead to production problems in the oilfield development process. In this paper, methods such as elemental analysis, and solvent extraction are adopted for the study of wellbore blockages. The content of organic matter in blockages is higher than 96% and asphaltene is the main component of the ...
Qingzhe Jiang, Jixiang Guo, Chaogang Chen, Na An, Na An, Yangqiu Pan, Yaguang Li   +6 more
openaire   +2 more sources

Resonance‐induced restoration of rock permeability degraded by heavy components of crude oil

Deep Underground Science and Engineering, EarlyView.
Resonance‐induced changes occur in filtration properties of sedimentary rocks in crude paraffin oil flow under acoustic vibrations. Experimental data on (a) pressure drop; (b) permeability; (c) pressure at the rock inlet; and (d) pressure at the rock outlet are presented.
Evgenii Riabokon, Qian Yin, Mikhail Guzev, Mikhail Turbakov, Evgenii Kozhevnikov, Nadezhda Riabokon, Ivan Panteleev   +6 more
wiley   +1 more source

Asphalt Binder Laboratory Short-Term Aging [PDF]

, 2019
The Rolling Thin Film Oven (RTFO) is widely used to simulate asphalt binder short-term aging. However, there is a general interest to improve the current short-term aging protocol especially for reducing the aging time.
Haghshenas, Hamzeh, Rea, Robert C.
core   +1 more source

Storage stability of SBS/sulfur modified bitumens at high temperature: influence of bitumen composition and structure [PDF]

, 2014
Polymer modified bitumens, PMBs, are usually prepared at high temperature and subsequently stored for a period of time, also at high temperature. The stability of PMBs, in these conditions, has a decisive influence in order to obtain the adequate ...
Aguirre de Carcer, I., Barceló, Francisco, Contreras, Verónica, González Prolongo, Margarita, Masegosa Fanego, Rosa María, Páez, Antonio, Salom Coll, Catalina, Sanchez-Cabezudo Tirado, Marta, Viñas Sánchez, María Teresa   +8 more
core   +2 more sources

An Experimental Investigation and Prediction of Asphaltene Deposition during Laminar Flow in the Pipes Using a Heat Transfer Approach [PDF]

Iranian Journal of Oil & Gas Science and Technology, 2017
In this study, asphaltene deposition from crude oil has experimentally and theoretically been studied using a test loop and an accurate temperature monitoring during a laminar flow.
Farhad Salimi, Shahab Ayatollahi, Mohsen Vafaie Seftie   +2 more
doaj   +1 more source

Far- and mid-infrared spectroscopy of complex organic matter of astrochemical interest: coal, heavy petroleum fractions, and asphaltenes [PDF]

, 2012
The coexistence of a large variety of molecular species (i.e., aromatic, cycloaliphatic and aliphatic) in several astrophysical environments suggests that unidentified IR emission (UIE) occurs from small solid particles containing a mix of aromatic and aliphatic structures (e.g., coal, petroleum, etc.), renewing the astronomical interest on this type ...
arxiv   +1 more source

Pre‐treatment with extraction solvent yields higher recovery: Method optimization for efficient determination of polycyclic aromatic hydrocarbons in organic‐rich fine‐textured wastes

Journal of Environmental Quality, EarlyView.
Abstract Fluid fine tailings (FFT) contain numerous organic compounds, including polycyclic aromatic hydrocarbons (PAHs). Growing concerns of PAH toxicity warrants monitoring for environmental consequences and natural attenuation. Conventional Soxhlet extraction yields low (∼50%–60%) recovery of PAHs (naphthalene, phenanthrene, pyrene, dibenzofuran ...
Henian Guo, Najmeh Samadi, Maryam Firoozbakht, Alsu Kuznetsova, Tariq Siddique   +4 more
wiley   +1 more source

Aggregation of model asphaltenes – a molecular dynamics study [PDF]

, 2016
Natural asphaltenes are defined as polyaromatic compounds whose chemical composition and structure is dependent on its geological origin and production history, hence are regarded as complex molecules with aromatic cores and aliphatic tails that occur in
Costa, J L L F S, Mulheran, P A, Simionesie, D, Zhang, Z J   +3 more
core   +2 more sources

Ion Source Complementarity for Characterization of Complex Organic Mixtures Using Fourier Transform Mass Spectrometry: A Review

Mass Spectrometry Reviews, EarlyView.
ABSTRACT Complex organic mixtures are found in many areas of research, such as energy, environment, health, planetology, and cultural heritage, to name but a few. However, due to their complex chemical composition, which holds an extensive potential of information at the molecular level, their molecular characterization is challenging.
Charlotte Mase, Maxime Sueur, Hélène Lavanant, Christopher Paul Rüger, Pierre Giusti, Carlos Afonso   +5 more
wiley   +1 more source

Fractionation of Asphaltenes in Understanding Their Role in Petroleum Emulsion Stability and Fouling [PDF]

, 2017
SARA fractionation separates crude oil into fractions of saturates (S), aromatics (A), resins (R), and asphaltenes (A) based on the differences in their polarizability and polarity.
Akbarzadeh K., David Harbottle, Jacob Masliyah, Johan Sjoblom, Peiqi Qiao, Plamen Tchoukov, Qingxia Liu, Tu Y., Tu Y., Tu Y., Zhenghe Xu   +10 more
core   +1 more source