加蓬A油田原油物性研究及防蜡剂评价

 测定了加蓬A油田6口油井油样的蜡含量、倾点、黏度、析蜡点和屈服值等指标.通过测定这些影响原油流变性的关键指标,得出,加蓬A油田的原油为高含蜡、高倾点原油,蜡组分中高碳重质组分权重很大;蜡含量高达34.04%以上,平均倾点为28℃,平均析蜡点为47.5℃,平均屈服值为159.11Pa.防蜡剂FLO-1在加量为100×10^-4时,对TST-B09H井油样的防蜡率可以达到91.86％,对于NZOB-Z05H井油样可以达到81.47%.这为加蓬原油的开采、运输、加工等提供了有效的基础数据,也为油井现场清防蜡工作,特别是对化学清防蜡剂的筛选提供直接的理论支持.

Physical Properties of Crude Oil in A Oilfield of Gabon and the Evaluation of Paraffin Inhibitor

The physical properties of Gabon oil were characterized by analyzing paraffin content, pour point, viscosity, wax precipitation point, and yield value of six wells oil samples from Gabon A oilfield. All of the indicators are key points to the crude oil rheological properties. The results show that the crude oil of Gabon A oilfield is the crude oil containing high wax and high pour points. High carbon component accounts for a large portion of the paraffin components; paraffin content is above 34.04%, average pour point is 28.25℃, average wax precipitation point is 47.51℃, average yield value is 159.11Pa. For the oil samples of TST-B09H and NZOB-Z05H, the ratio of paraffin inhibition is over 90%, 80%, respectively by adding FLO-1 paraffin inhibitor of 100×10^-4. The data obtained provides a direct theoretical support for Gabonese crude oil extraction, transportation, processing, and for the on site work of wax prevention and cleaning of oil well, particularly for screening chemical agents for wax control.