Influence of Production Parameters on Asphaltene Precipitation Regularity in Wellbore

doi:10.11885/j.issn.1674-5086.2015.05.19.04

Abstract

Abstract: This study investigated the influence of production parameters on asphaltene precipitation regularity under the conditions of high temperature and high pressure and evaluated the influence of temperature, GOR (gas-oil ratio), and flow velocity on asphaltene precipitation in wellbores. The results showed that the pressure of asphaltene precipitation (p_onset) was inverse to temperature and the pressure of asphaltene redissolving (p_red) was proportionate to temperature. p_onset was proportionate to the GOR at a certain temperature because the dissolved gases in the oil increased when the GOR improved and may have caused asphaltene precipitation. p_onset and p_red were not influenced by flow velocity in certain GOR and temperature ranges. This study demonstrated how asphaltene precipitation regularity can be controlled to decrease the risk of asphaltene precipitation in wellbores.

Key words: asphaltene, precipitation regularity, temperature, GOR, flow velocity

CLC Number:

TE357.14

WU Chuan, ZHANG Rusheng, ZHANG Zuguo, SHE Yuehui, WU Zhengbin. Influence of Production Parameters on Asphaltene Precipitation Regularity in Wellbore[J]. 西南石油大学学报(自然科学版), 2017, 39(2): 172-178.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2015.05.19.04

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2017/V39/I2/172

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