the thixotropy tests, yield experiments,and Oscillation stress sweep experiments and so on are conducted to investigate the properties of a specific waxy crude oil , but results are difficult reproducible and incapable comparable as influenced by the shear history and thermal history of the crude oil . I don't know whether there aresome standards to eliminate this influence.some references refer to pretreat the crude oil with specic temperature(such as 80℃) to remove the shear and thermal history of the crude oil，but I don't know how the determine the specific temperatre for my experiments and don't know whether there are some standards for it. thank you for your attention and suggestions
80℃ is the temperature of asphaltene floacculates destroing. Then more time you will hold this temperature of oil then will be better cleaned the thermal and shear history. We researched it for heavy oil by determination of particle sizes after heating. The time was about 24 hours. There is an article where presented diagam of asphaltene phase transactions in dependance of temperature and their consentrations. Ganeeva Yu. M., Yusupova T. N., Romanov G. V. Asphaltene nano-aggregates: structure, phase transitions and effect on petroleum systems // Russian Chemical Review. - 2011. – No. 80 (10). - pp. 993-1008.
I have It's file just in Russian. In case you have an access to Springler you'll be able to find it.
80℃ is the temperature of asphaltene floacculates destroing. Then more time you will hold this temperature of oil then will be better cleaned the thermal and shear history. We researched it for heavy oil by determination of particle sizes after heating. The time was about 24 hours. There is an article where presented diagam of asphaltene phase transactions in dependance of temperature and their consentrations. Ganeeva Yu. M., Yusupova T. N., Romanov G. V. Asphaltene nano-aggregates: structure, phase transitions and effect on petroleum systems // Russian Chemical Review. - 2011. – No. 80 (10). - pp. 993-1008.
I have It's file just in Russian. In case you have an access to Springler you'll be able to find it.
80℃ is the temperature of asphaltene floacculates destroing. Then more time you will hold this temperature of oil then will be better cleaned the thermal and shear history. We researched it for heavy oil by determination of particle sizes after heating. The time was about 24 hours. There is an article where presented diagam of asphaltene phase transactions in dependance of temperature and their consentrations. Ganeeva Yu. M., Yusupova T. N., Romanov G. V. Asphaltene nano-aggregates: structure, phase transitions and effect on petroleum systems // Russian Chemical Review. - 2011. – No. 80 (10). - pp. 993-1008. I have It's file just in Russian. In case you have an access to Springler you'll be able to find it.
80℃ is the temperature of asphaltene floacculates destroing. Then more time you will hold this temperature of oil then will be better cleaned the thermal and shear history. We researched it for heavy oil by determination of particle sizes after heating. The time was about 24 hours. There is an article where presented diagam of asphaltene phase transactions in dependance of temperature and their consentrations. Ganeeva Yu. M., Yusupova T. N., Romanov G. V. Asphaltene nano-aggregates: structure, phase transitions and effect on petroleum systems // Russian Chemical Review. - 2011. – No. 80 (10). - pp. 993-1008. I have It's file just in Russian. In case you have an access to Springler you'll be able to find it.
ASTM D5853 Standard Test Method for Pour Point of Crude Oils provides detailed instructions. See Section 9 on Procedure.
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