Asphaltene precipitation from live oils: An experimental investigation of onset conditions and reversibility

被引:201
作者
Hammami, A [1 ]
Phelps, CH
Monger-McClure, T
Little, TM
机构
[1] DB Robinson Res Ltd, Edmonton, AB T6N 1E5, Canada
[2] Marathon Oil Co, Petr Technol Ctr, Littleton, CO 80120 USA
[3] Marathon Oil Co, Oklahoma City, OK USA
关键词
Dissolution - Isotherms - Precipitation (chemical) - Pressure effects - Thermal effects;
D O I
10.1021/ef990104z
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
The behavior of asphaltene in live oils was investigated using a fully visual PVT cell equipped with a laser-based particle detection system. Through a series of isothermal pressure depletion experiments, the asphaltene stability envelope was established for several Gulf of Mexico oils. These tests were performed under pressure and temperature conditions typical of a field production system. Evidence of asphaltene precipitation above and redissolution below the saturation pressure was observed. Significantly, these tests also showed that pressure depletion-induced asphaltene precipitation is a highly reversible process. This latter observation helps to resolve a long-running debate in the literature concerning the reversibility of the asphaltene precipitation and flocculation process.
引用
收藏
页码:14 / 18
页数:5
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