西南石油大学学报(自然科学版)

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Experimental Investigation on the Flow Characteristics of the Local#br# Oil-water Two Phases Flow System in Hilly-terrain Tube

Xu Guangli1,2*, Zhang Xin3, Cai Liangxue1, Zhang Jing3, Wang Gaozhuang4   

  1. 1. School of Petroleum and Natural Gas Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. Oil & Gas Fire Protection Key Laboratory of Sichuan Province,Chengdu,Sichuan 611731,China
    3. Guangdong Regional Office,Petrochina West-east Gas Pipeline Company,Guangzhou,Guangdong 510665,China
    4. Pipeline Company,Yanchang Petroleum Group,Yan′ an,Shaanxi 716000,China
  • Online:2015-10-01 Published:2015-10-01

Abstract:

The study is motivated by the problem of pipeline corrosion due to water accumulation at low spots. Lab-scale
experiments were conducted to identify the flow patterns of the hilly-terrain transparent organic glass tube. Test loop with
pipe diameter of 50 mm I.D. with diesel and tap water was used. The oil-water flow patterns were found to develop from the
smooth stratified flow to wavy stratified flow and even to emulsive stratified flow when residual water sheared by the faster
flowing oil. With the increasing oil superficial velocity,the average water velocity increases linearly while the average water
holdup decreases linearly once all the water entered the upwards inclined tube. The oil superficial velocity corresponding to the
minimum Uos carrying all the water entering the upwards inclined tube was found to increase with the increasing inclination
angle,but change a little with increasing water volume. These results show that water can be carried out by flowing oil.

Key words: oil water two phases flow, hilly-terrain tube, stratified flow, velocity slip

CLC Number: