Results 161 to 170 of about 1,915 (207)

Revisiting the methodology for asphaltenes precipitation

Journal of Petroleum Science and Engineering, 2019
Abstract The world increase in energy demand has directed the petroleum industry to exploit unconventional oil reserves such as the Brazilian Pre-Salt reservoirs. Production conditions verified in those reservoirs enhance the occurrence of asphaltene precipitation as well as the correlated problems.
Denisson Santos, Monique Amaral, Elvio B.M. Filho, Raul S. Dourado, João A.P. Coutinho, Gustavo R. Borges, Elton Franceschi, Cláudio Dariva   +7 more
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CO2 influence on asphaltene precipitation

The Journal of Supercritical Fluids, 2019
Abstract The energy industry has registered a considerable growth of petroleum production from reservoirs located in deep and ultra-deepwater, mainly in Brazil. The Brazilian Pre-Salt fields, specifically, have shown high carbon dioxide content which favors the precipitation of organic particles such as asphaltenes.
Arley A. Cruz, Monique Amaral, Denisson Santos, André Palma, Elton Franceschi, Gustavo R. Borges, João A.P. Coutinho, Julio Palácio, Cláudio Dariva   +8 more
openaire   +1 more source

Aggregation thermodynamics for asphaltene precipitation

AIChE Journal, 2016
Asphaltene precipitation has been a major concern for petroleum industry due to its adverse effect on upstream production, midstream transportation, and downstream refining. As a complex phenomenon involving solubility, aggregation, and clustering, asphaltene precipitation has been extensively investigated and correlated with empirical models and ...
Meng Wang, Yifan Hao, Md Rashedul Islam, Chau‐Chyun Chen   +3 more
openaire   +1 more source

Evaluation of different thermodynamic models in predicting asphaltene precipitation: A comparative study

Fluid Phase Equilibria, 2020
One of the major issues in the oil industry is asphaltene precipitation. Modeling asphaltene precipitation is still considered as a complex problem due to various characteristics of different heavy components existing in the crude oil.
Amin Daryasafar, Mohammad Masoudi, Shahin Kord   +2 more
exaly   +2 more sources

Modeling Technique of Asphaltene Precipitation

Proceedings of SPE Permian Basin Oil and Gas Recovery Conference, 2001
Abstract Study of three phase equilibrium has been seen from many literatures. Most research on modeling of asphaltene precipitation has remained in qualitative description stage. Even though quantitative calculation of asphaltene precipitation can be seen from some reports.
Min Li, Ping Guo, Shilun Li
openaire   +1 more source

Investigation on the Reversibility of Asphaltene Precipitation

Energy & Fuels, 2001
The precipitation and redissolution of asphaltenes upon the addition and removal of solvent were investigated for Athabasca and Cold Lake bitumens using a flow-loop apparatus. The presence of precipitate was detected through an increase in pressure drop across an in-line filter.
Subodhsen Peramanu, Chandresh Singh, Mayur Agrawala, Harvey W. Yarranton   +3 more
openaire   +1 more source

ON THE MASS BALANCE OF ASPHALTENE PRECIPITATION

Petroleum Science and Technology, 2001
In the evaluation of experimental data as well as in calculation of phase equilibria the necessity of the application of mass balances is obvious. In the case of asphaltenes the colloidal nature of these compounds may highly affect the mass balance.
Simon Ivar Andersen, Carlos Lira-Galeana, Erling H. Stenby   +2 more
openaire   +1 more source

Hysteresis in Asphaltene Precipitation and Redissolution

Energy & Fuels, 2005
The precipitation and redissolution of asphaltenes from mixtures of Athabasca bitumen and n-heptane was measured over time in both air and nitrogen atmospheres at 23 °C. In air, it appears that oxidation of the bitumen increased the asphaltene yield for as long as the experiments were conducted; that is, for several months.
J. Beck, W. Y. Svrcek, H. W. Yarranton
openaire   +1 more source

A study of asphaltene solubility and precipitation

Fuel, 2004
Abstract The effects of diluent composition on asphaltene precipitation from Cold Lake vacuum residue and Athabasca atmospheric tower bottoms were determined using the hot filtration method at 60–85 °C. For selected mixtures the temperature range was extended to 300 °C.
Hong E, Paul Watkinson
openaire   +1 more source

Asphaltene precipitation and deposition: A critical review

Journal of Petroleum Science and Engineering, 2021
Abstract Asphaltene deposition in the reservoirs, tubbing, and surface facilities causes serious flow assurance problems with significant economic implications. Asphaltene flow assurance challenge results from pressure depletion, fluid compositional change, and electrostatic interactions between the rock-fluid system resulting in deposition inside ...
Isah Mohammed, Mohamed Mahmoud, Dhafer Al Shehri, Ammar El-Husseiny, Olalekan Alade   +4 more
openaire   +1 more source