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Study on yielding behavior of the waxy crude of Daqing Oilfield near condensation point
Author(s): 
Pages: 58-60,64,114
Year: Issue:  4
Journal: Journal of Xi'an Petroleum Institute(Natural Scien

Keyword:  waxy crudegelling characteristicpipelining simulationyield stress;
Abstract: The shut-off of the long distance pipeline for waxy crude oil often occurs.The gelling and yielding behaviors of waxy crude oil near condensation point temperature are the very important bases for evaluating the safety of the pipeline when the long distance pipeline shuts up.The yielding behavior of the waxy crude oil of Daqing Oilfield near condensation point is studied by simulation experiments.It is shown that there is a flex point on the relation curve between yield stress and end-cooling temperature,the flex point is 2 ℃ above gel temperature;when the end-cooling temperature is constant,there is a exponential relation between yield stress and measuring temperature.The empirical relational expressions between yield stress and end-cooling temperature and measuring temperature are established by the comprehensive analysis of the experimental data.This research provides basic data for the hydraulic calculation of Tieda pipeline in the restarting process after shut-off.
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