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综合含水68%～72%的胜利孤东新滩稠油与水混合液,在加入乳化剂HA78浓度为400～800mg/L、现场搅拌条件下,可转相形成较为稳定的O/W乳状液。由于含水率和搅拌强度的变化,在相同样加剂浓度下,现场条件配制的O/W乳状液较试验室配制的表观黏度低,其非牛顿性弱,稳定性有所下降,表观黏度随温度下降变化不明显。在加剂400～800mg/L范围减阻效果与乳化剂浓度成正比,混合方式对减阻效果影响不大。对于试验管道垦东451—东4联集输管道而言,从输送压降分析,在含水量相同的条件下,加入乳化剂后油水混合输送减阻效果优于掺热水输送效果,可以实现全越站输送。管流条件下,在O/W乳状液比较稳定时,减阻主要以降黏减阻为主,而在O/W乳状液不稳定时,主要以管壁与稠油之间形成水膜减阻为主。
Comprehensive water 68% to 72% of the victory Gudong Dongtan heavy oil and water mixture, the addition of emulsifier HA78 concentration of 400 ~ 800mg / L, the scene mixing conditions, the phase can be rotated to form a more stable O / W emulsion . Due to the change of water content and stirring intensity, the apparent viscosity of O / W emulsions formulated under field condition is lower than that prepared by laboratory under the same sample concentration, and their non-Newtonian weakness and stability decrease. Apparent Viscosity changes with temperature is not obvious. In the additive 400 ~ 800mg / L drag reduction effect is proportional to the concentration of emulsifier, mixing mode drag reduction effect. For the test pipe Kendong 451-East 4 joint pipeline, from the transmission pressure drop analysis, under the same moisture content, the oil-water mixed transport drag reduction effect is better than that of the mixed water supply after the emulsifier is added, which can be achieved All the more transit. Under flow conditions, when the O / W emulsion is relatively stable, the drag reduction is dominated by the viscosity reduction and drag reduction. When the O / W emulsion is unstable, the water drag reduction mainly occurs between the pipe wall and the heavy oil Mainly.