Measurement and Modeling of Asphaltene Precipitation from Crude Oil Blends

2009 ◽  
Vol 23 (8) ◽  
pp. 3971-3980 ◽  
Author(s):  
Asok Kumar Tharanivasan ◽  
William Y. Svrcek ◽  
Harvey W. Yarranton ◽  
Shawn D. Taylor ◽  
Daniel Merino-Garcia ◽  
...  
Keyword(s):  
Crude Oil ◽  
Asphaltene Precipitation ◽  
Oil Blends

Prediction of crude oil blends compatibility and blend optimization for increasing heavy oil processing

2018 ◽  
Vol 177 ◽  
pp. 309-327 ◽  
Author(s):  
Rajeev Kumar ◽  
Ravi Kumar Voolapalli ◽  
Sreedevi Upadhyayula
Keyword(s):  
Crude Oil ◽  
Heavy Oil ◽  
Oil Blends ◽  
Oil Processing

Developing a novel colloidal model for predicting asphaltene precipitation from crude oil by alkane dilution

2020 ◽  
Vol 318 ◽  
pp. 113879
Author(s):  
Mohammad Mahdi Shadman ◽  
Mohammad Hasan Badizad ◽  
Mostafa Dehghanizadeh ◽  
Amir Hossein Saeedi Dehaghani
Keyword(s):  
Crude Oil ◽  
Asphaltene Precipitation

scholarly journals An experimental investigation of asphaltene stability in heavy crude oil during carbon dioxide injection

2019 ◽  
Vol 10 (3) ◽  
pp. 919-931 ◽  
Author(s):  
Sherif Fakher ◽  
Mohamed Ahdaya ◽  
Mukhtar Elturki ◽  
Abdulmohsin Imqam
Keyword(s):  
Carbon Dioxide ◽  
Crude Oil ◽  
Pore Size ◽  
Oil Recovery ◽  
Asphaltene Precipitation ◽  
Carbon Dioxide Injection ◽  
Oil Viscosity ◽  
Membrane Pore ◽  
Pore Sizes ◽  
Filter Membrane

Abstract Carbon dioxide (CO2) injection is one of the most applied enhanced oil recovery methods in the hydrocarbon industry, since it has the potential to increase oil recovery significantly and can help reduce greenhouse gases through carbon storage in hydrocarbon reservoirs. Carbon dioxide injection has a severe drawback, however, since it induces asphaltene precipitation by disrupting the asphaltene stability in crude oil that bears even the slightest asphaltene concentration. This can result in severe operational problems, such as reservoir pore plugging and wellbore plugging. This research investigates some of the main factors that impact asphaltene stability in crude oil during CO2 injection. Initially, asphaltene precipitation, flocculation, and deposition were tested using visual tests without CO2 in order to evaluate the effect of oil viscosity and temperature on asphaltene stability and content in the crude oil. The results obtained from the visualization experiments were correlated to the Yen–Mullins asphaltene model and were used to select the proper chemical to alter the oil’s viscosity without strongly affecting asphaltene stability. After performing the visual asphaltene tests, a specially designed filtration vessel was used to perform the oil filtration experiments using filter membranes with a micron and nanometer pore size. The effect of varying CO2 injection pressure, oil viscosity, filter membrane pore size, and filter membrane thickness on asphaltene stability in crude oil was investigated. The results were then correlated with the Yen–Mullins asphaltene model to characterize the asphaltene size within the oil as well. Results showed that as the oil viscosity increased, the asphaltene concentration in the oil also increased. Also, the asphaltene concentration and filter cake thickness increased with the decrease in filter membrane pore size, since the asphaltene particles either plugged up the smaller pores, or the asphaltene nanoaggregates were larger than the pore sizes, and thus the majority of them could not pass. This research studies asphaltene instability in crude oil during CO2 injection in different pore sizes, and correlates the results to the principle of the Yen–Mullins model for asphaltenes. The results from this research can help emphasize the factors that will impact asphaltene stability during CO2 injection in different pore sizes in order to help reduce asphaltene-related problems that arise during CO2 injection in hydrocarbon reservoirs.

An experimental and theoretical investigation of asphaltene precipitation in a crude oil from the Brazilian pre-salt layer under CO2 injection

Fuel ◽  
2021 ◽  
Vol 284 ◽  
pp. 118968
Author(s):  
Fabio P. Nascimento ◽  
Verônica J. Pereira ◽  
Renan P. Souza ◽  
Rui C.A. Lima ◽  
Glória M.N. Costa ◽  
...  
Keyword(s):  
Crude Oil ◽  
Theoretical Investigation ◽  
Co2 Injection ◽  
Asphaltene Precipitation ◽  
Salt Layer

scholarly journals Chemical study of asphaltene inhibitors effects on asphaltene precipitation of an Iranian oil field

2020 ◽  
Vol 75 ◽  
pp. 6 ◽  
Author(s):  
Afshar Ahmadbaygi ◽  
Behrouz Bayati ◽  
Mohsen Mansouri ◽  
Hossein Rezaei ◽  
Masoud Riazi
Keyword(s):  
Fourier Transform ◽  
Crude Oil ◽  
Ftir Spectroscopy ◽  
Chemical Structure ◽  
Chemical Study ◽  
Oil Field ◽  
Asphaltene Precipitation ◽  
Spectroscopy Analysis ◽  
Synthetic Oil ◽  
Onset Point

The amount of precipitated asphaltene can be considerably reduced with pretreatment of asphaltene inhibitor, in the crude oil. Efficiency of asphaltene inhibitors mainly depends on some parameters such as pH of the oil and the chemical structure of asphaltene inhibitors. In this paper, the amounts of asphaltene precipitation have been experimentally measured using two n-paraffin precipitants; n-heptane and n-hexane. The performance of the studies on the asphaltene accumulation was studied using Fourier-Transform Infrared (FTIR) Spectroscopy analysis. The onset point has been determined by three different commercial asphaltene inhibitors. The results show that when an asphaltene inhibitor is not injected into the mixture of synthetic oil/n-heptane, AOP (Asphaltene Onset Point) occurs at 35 vol.% of n-heptane, while with addition of 3000 ppm of asphaltene B inhibitor, AOP occurs at 60 vol.% of n-heptane.

scholarly journals Modeling of Asphaltene Precipitation from Crude Oil with the Cubic Plus Association Equation of State

2017 ◽  
Vol 31 (2) ◽  
pp. 2063-2075 ◽  
Author(s):  
Alay Arya ◽  
Xiaodong Liang ◽  
Nicolas von Solms ◽  
Georgios M. Kontogeorgis
Keyword(s):  
Equation Of State ◽  
Crude Oil ◽  
Asphaltene Precipitation

Prediction of asphaltene precipitation in crude oil

2009 ◽  
Vol 68 (3-4) ◽  
pp. 218-222 ◽  
Author(s):  
G. Zahedi ◽  
A.R. Fazlali ◽  
S.M. Hosseini ◽  
G.R. Pazuki ◽  
L. Sheikhattar
Keyword(s):  
Crude Oil ◽  
Asphaltene Precipitation
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