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1)  onset of asphaltene precipitation
沥青质沉淀点
1.
The applicability of scaling equation for predicting onset of asphaltene precipitation has been studied and further extended to high-pressure gas injected system and precipitant/solvent/oil system.
研究了用标度方程预测沥青质沉淀点的可行性,并将其推广应用至高压注气体系和沉淀剂/溶剂/原油体系。
2)  asphaltene precipitation
沥青质沉淀
1.
Experimental studies on asphaltene precipitation with CO_2 miscible flooding in Fan 124 block of Daluhu Oilfield;
大芦湖油田樊124断块CO_2混相驱过程中沥青质沉淀实验研究
3)  amount of asphaltene precipitation
沥青质沉淀量
1.
The results show that the scaling equation can provide accurate predictions for onset of asphaltene precipitation when knowing the variation of amount of asphaltene precipitation with dilution ratio in both normal-pressure n-alkane systems and high-pressure gas injected systems.
结果表明,对常压正构烷烃体系和高压注气体系,标度方程可以通过较易测定的沥青质沉淀量准确预测较难测定的沥青质的沉淀点;对常压正构烷烃体系和沉淀剂/溶剂/原油体系,标度方程可通过有限正构烷烃沥青质沉淀点数据准确预测其它正构烷烃沥青质的沉淀点。
4)  asphalt deposition
沥青沉淀
1.
Research progress on corrosion,scaling and asphalt deposition in heavy oil CO_2 flooding;
稠油CO_2吞吐腐蚀、结垢和沥青沉淀研究进展
5)  Reservoir bitumen-sealed belt
储层沥青沉淀带
6)  asphaltene deposition
沥青质沉积
1.
Severe borehole asphaltene deposition appears in a lot of production wells of Ordovician reservoirs of temperature 126℃ in Tahe and well TK305 is shut in after several remediation treatments failured.
塔河油田奥陶系油藏(地温126℃)多口采油井井筒出现沥青质沉积,其中TK305井多次处理无效而停产,连续注入掺沥青分散稳定剂SLAD-02(主要成分为大分子含氟表面活性剂)的原油,使该井恢复生产。
2.
It is shown that the damage to reservoir formation and the negative influence on well productivity owing to asphaltene deposition can not be neglect.
综述了近来受到国际石油界普遍关注的沥青质沉积引起近井地带储层损害的问题。
补充资料：沉淀点
分子式：
CAS号：

性质：把沉淀剂逐渐加到高分子-良溶剂体系中，当沉淀剂的组成逐渐增大时，分子量比较大的高分子将首先从溶液中分离出来。若用r表示沉淀剂在溶剂-沉淀剂中所占体积分数，则大分子刚刚开始分离出来时，相应的r值就称为沉淀点，用r*表示，当浓度不很稀时，r*值满足下式，即r*=A-Blogc+D/M。式中c是溶液浓度,A，B,D都是常数，其值与聚合物、溶剂、沉淀剂以及温度有关，M是聚合物的分子量。   

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