TY - JOUR
T1 - Effect of pipe diameter on horizontal oil-water flow before and after addition of drag-reducing polymer part I
T2 - Flow patterns and pressure gradients
AU - Abubakar, A.
AU - Al-Wahaibi, Y.
AU - Al-Wahaibi, T.
AU - Al-Hashmi, A. R.
AU - Al-Ajmi, A.
AU - Eshrati, M.
PY - 2017/5/1
Y1 - 2017/5/1
N2 - In this work, the results of the experimental investigations of oil-water flow in the absence and presence of water-soluble drag-reducing polymer in two different horizontal pipe diameters (55.7 and 74.67-mm ID) and their comparisons with the results in horizontal 30.6-mm ID pipe were presented. During the study, mixture velocity of the oil-water flow was varied from 0.1 to 1.6 m/s while the input oil volume fraction was varied from 0.05 to 0.9. At each experimental run, the polymer master solution of 2000 ppm concentration was injected into the flow at a controlled flow rate such that 40 ppm concentration of the polymer was achieved in the water phase. The six flow patterns previously observed in the 30.6-mm ID pipe reduced to four in the larger pipes. Although the presence of the polymer only affected the water-continuous flow patterns just like in the 30.6-mm ID pipe, the increase in the pipe diameter increased the regions of separated flow patterns before and after the addition of the polymer. Similarly, the frictional pressure gradients were significantly decreased by the polymer addition in all the three pipes resulting to huge drag reductions, which virtually decreased with increase in the pipe diameters.
AB - In this work, the results of the experimental investigations of oil-water flow in the absence and presence of water-soluble drag-reducing polymer in two different horizontal pipe diameters (55.7 and 74.67-mm ID) and their comparisons with the results in horizontal 30.6-mm ID pipe were presented. During the study, mixture velocity of the oil-water flow was varied from 0.1 to 1.6 m/s while the input oil volume fraction was varied from 0.05 to 0.9. At each experimental run, the polymer master solution of 2000 ppm concentration was injected into the flow at a controlled flow rate such that 40 ppm concentration of the polymer was achieved in the water phase. The six flow patterns previously observed in the 30.6-mm ID pipe reduced to four in the larger pipes. Although the presence of the polymer only affected the water-continuous flow patterns just like in the 30.6-mm ID pipe, the increase in the pipe diameter increased the regions of separated flow patterns before and after the addition of the polymer. Similarly, the frictional pressure gradients were significantly decreased by the polymer addition in all the three pipes resulting to huge drag reductions, which virtually decreased with increase in the pipe diameters.
KW - Drag reductions
KW - Flow patterns
KW - Oil-water
KW - Pipe diameters
KW - Pressure gradients
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U2 - 10.1016/j.petrol.2017.03.021
DO - 10.1016/j.petrol.2017.03.021
M3 - Article
AN - SCOPUS:85015628588
SN - 0920-4105
VL - 153
SP - 12
EP - 22
JO - Journal of Petroleum Science and Engineering
JF - Journal of Petroleum Science and Engineering
ER -