Numerical Simulation of Critical Oil Velocity Required to Completely Remove Water Lump Deposited in Hilly Oil Pipelines

doi:10.16183/j.cnki.jsjtu.2020.020

Abstract

Abstract:

Removing the trapped water lump from the pipelines by using the hydraulic pigging (HP) method can effectively reduce the attenuation of oil quality. It is of great practical significance to study the critical oil velocity required to completely remove the water lump trapped in hilly oil pipelines. First, the flow patterns of water expelled by oil stream in an upward inclined pipeline are analyzed when the oil velocity in pipelines reachs the critical value required to completely remove the water. It is found that the flow process of the water removed by oil stream belongs to oil-water two phase stratified wavy flow. Next, the numerical model governing the flow of water expelled by oil is established in the bipolar coordinate system based on the flow pattern aforementioned, and the numerical solution method is also proposed. Finally, the numerical model is validated through the comparison of the results calculated by the model with the data from the literature. The flow of water lump expelled by diesel in an upward inclined pipeline is numerically studied, and the characteristics of the oil flow and water lump mobilization during the HP process are analyzed in detail. The results show that the water lump is mainly influenced by gravity pressure drop. The friction pressure drop could be neglected compared to the gravity pressure drop. When the oil velocity in the pipe is small, the water phase near the interface is carried downstream by the oil stream, while that near the pipe wall flows back to the bottom of the pipeline due to gravity. The postion of the minimum velocity in the water phase will shift to the pipe wall with the oil velocity increasing. When the minimum water velocity appears at the pipe wall for the first time, the oil velocity in pipelines can be regarded as the critical oil velocity required to completely remove the water lump in the pipelines.

Key words: oil pipeline, water expelled by oil stream, critical oil velocity to completely remove water, two-phase flow, numerical simulation

CLC Number:

TB126
TE832

LI Yansong, DING Dingqian, HAN Dong, LIU Jing, LIANG Yongtu. Numerical Simulation of Critical Oil Velocity Required to Completely Remove Water Lump Deposited in Hilly Oil Pipelines[J]. Journal of Shanghai Jiao Tong University, 2021, 55(7): 878-890.

Figures/Tables 12

Fig.1

Fig.2

Fig.3

Tab.1

Boundary conditions

控制变量	管壁边界条件	相界面边界条件	对称边界条件	入口边界条件
$v - z$	$v - z, wal$ =0	τ_int,w=τ_int,o $v - z, w$ $v - z, o$	$∂ v - z ∂ x x = 0$ =0	$v - z, o$ =v_so
μ_SGS	μ_SGS,wal=0	波状界面模型计算	$∂ μ SGS ∂ x x = 0$ =0

Tab.1

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

References 32

[1]	NOVITSKY N N, ALEKSEEV A V, GREBNEVA O A, et al. Multilevel modeling and optimization of large-scale pipeline systems operation[J]. Energy, 2019, 184:151-164. doi: 10.1016/j.energy.2018.02.070 URL
[2]	祝悫智, 吴超, 李秋扬, 等. 全球油气管道发展现状及未来趋势[J]. 油气储运, 2017, 36(4): 375-380.
	ZHU Quezhi, WU Chao, LI Qiuyang, et al. Development status and trend of global oil and gas pipelines[J]. Oil & Gas Storage and Transportation, 2017, 36(4): 375-380.
[3]	POURARIA H, SEO J K, PAIK J K. A numerical study on water wetting associated with the internal corrosion of oil pipelines[J]. Ocean Engineering, 2016, 122:105-117. doi: 10.1016/j.oceaneng.2016.06.022 URL
[4]	XIAO R J, XIAO G Q, HUANG B, et al. Corrosion failure cause analysis and evaluation of corrosion inhibitors of Ma Huining oil pipeline[J]. Engineering Failure Analysis, 2016, 68:113-121. doi: 10.1016/j.engfailanal.2016.05.029 URL
[5]	SONG X Q, YANG Y X, YU D L, et al. Studies on the impact of fluid flow on the microbial corrosion behavior of product oil pipelines[J]. Journal of Petroleum Science and Engineering, 2016, 146:803-812. doi: 10.1016/j.petrol.2016.07.035 URL
[6]	Energy Institute, Joint Inspection Group. EI/JIG Standard 1530 Quality assurance requirements for the manufacture, storage and distribution of aviation fuel to airports (A4) [DB/OL]. (2019-05-02)[2019-12-17]. https://publishing.energyinst.org/topics/aviation/aviation-fuel-handling/1530.
[7]	韩东, 刘静, 左志恒, 等. 西南某管道顺序输送航煤质量指标分析[J]. 油气田地面工程, 2019, 38(9): 69-75.
	HAN Dong, LIU Jing, ZUO Zhiheng, et al. Quality index analysis of the aviation kerosene sequential transportation in one southwestern pipeline[J]. Oil-Gas Field Surface Engineering, 2019, 38(9): 69-75.
[8]	耿新中. 气井携液机理与临界参数研究[J]. 天然气工业, 2018, 38(1): 74-80.
	GENG Xinzhong. Mechanism and critical parameters of liquid-carrying behaviors in gas wells[J]. Natural Gas Industry, 2018, 38(1): 74-80.
[9]	许振良, 蔡荣宦, 武日权, 等. 矿浆管道输送临界流速试验研究[J]. 洁净煤技术, 2018, 24(3): 139-143.
	XU Zhenliang, CAI Ronghuan, WU Riquan, et al. Experimental study on critical velocity of slurry pipeline transportation[J]. Clean Coal Technology, 2018, 24(3): 139-143.
[10]	LIU Q L, TIAN S C, SHEN Z H, et al. A new equation for predicting settling velocity of solid spheres in fiber containing power-law fluids[J]. Powder Technology, 2018, 329:270-281. doi: 10.1016/j.powtec.2018.01.076 URL
[11]	刘刚, 汤苑楠, 李博, 等. 成品油管道内杂质运移沉积及其影响规律[J]. 油气储运, 2017, 36(6): 708-715.
	LIU Gang, TANG Yuannan, LI Bo, et al. Movement, deposition and influence laws of impurities in the product oil pipelines[J]. Oil & Gas Storage and Transportation, 2017, 36(6): 708-715.
[12]	徐广丽, 张鑫, 蔡亮学, 等. 起伏管内局部油水两相流流动特性实验研究[J]. 西南石油大学学报(自然科学版), 2015, 37(5): 85-90.
	XU Guangli, ZHANG Xin, CAI Liangxue, et al. Experimental investigation on the flow characteristics of the local oil-water two phases flow system in hilly-terrain tube[J]. Journal of Southwest Petroleum University (Science & Technology Edition), 2015, 37(5): 85-90.
[13]	倪玲英, 张鲁飞, 杨思坤, 等. 机坪管道积水驱除数值模拟[J]. 油气储运, 2017, 36(10): 1139-1143.
	NI Lingying, ZHANG Lufei, YANG Sikun, et al. Numerical simulation on the expelling of water accumulated in apron pipelines[J]. Oil & Gas Storage and Transportation, 2017, 36(10): 1139-1143.
[14]	MAGNINI M, ULLMANN A, BRAUNER N, et al. Numerical study of water displacement from the elbow of an inclined oil pipeline[J]. Journal of Petroleum Science and Engineering, 2018, 166:1000-1017. doi: 10.1016/j.petrol.2018.03.067 URL
[15]	XU G L, CAI L X, ULLMANN A, et al. Experiments and simulation of water displacement from lower sections of oil pipelines[J]. Journal of Petroleum Science and Engineering, 2016, 147:829-842. doi: 10.1016/j.petrol.2016.09.049 URL
[16]	XU G L, ZHANG G Z, LIU G, et al. Trapped water displacement from low sections of oil pipelines[J]. International Journal of Multiphase Flow, 2011, 37(1): 1-11. doi: 10.1016/j.ijmultiphaseflow.2010.09.003 URL
[17]	SONG X Q, YANG Y X, ZHANG T, et al. Studies on water carrying of diesel oil in upward inclined pipes with different inclination angle[J]. Journal of Petroleum Science and Engineering, 2017, 157:780-792. doi: 10.1016/j.petrol.2017.07.076 URL
[18]	HANAFIZADEH P, HOJATI A, KARIMI A. Experimental investigation of oil-water two phase flow regime in an inclined pipe[J]. Journal of Petroleum Science and Engineering, 2015, 136:12-22. doi: 10.1016/j.petrol.2015.10.031 URL
[19]	徐广丽. 成品油管道油携水机理研究[D]. 青岛: 中国石油大学(华东), 2011.
	XU Guangli. Investigation on the mechanism of deposited water displaced by flowing oil in inclined products oil pipeline[D]. Qingdao: China University of Petroleum, 2011.
[20]	隋冰, 李博, 赵家良, 等. 起伏管道中成品油携杂质的流动状态[J]. 油气储运, 2017, 36(5): 519-525.
	SUI Bing, LI Bo, ZHAO Jialiang, et al. Flow regimes of oil product carrying impurity in undulate pipeline[J]. Oil & Gas Storage and Transportation, 2017, 36(5): 519-525.
[21]	ARGYROPOULOS C D, MARKATOS N C. Recent advances on the numerical modelling of turbulent flows[J]. Applied Mathematical Modelling, 2015, 39(2): 693-732. doi: 10.1016/j.apm.2014.07.001 URL
[22]	CATELLANI C, CAZZOLI G, FALFARI S, et al. Large eddy simulation of a steady flow test bench using OpenFOAM[J]. Energy Procedia, 2016, 101:622-629. doi: 10.1016/j.egypro.2016.11.079 URL
[23]	CHENG Z, HSU T J, CHAUCHAT J. An Eulerian two-phase model for steady sheet flow using large-eddy simulation methodology[J]. Advances in Water Resources, 2018, 111:205-223. doi: 10.1016/j.advwatres.2017.11.016 URL
[24]	ROTTA J C. Turbulent boundary layers in incompressible flow[J]. Progress in Aerospace Sciences, 1962, 2(1): 1-95. doi: 10.1016/0376-0421(62)90014-3 URL
[25]	LI Y S, HE G X, SUN L Y, et al. Numerical simulation of oil-water non-Newtonian two-phase stratified wavy pipe flow coupled with heat transfer[J]. Applied Thermal Engineering, 2018, 140:266-286. doi: 10.1016/j.applthermaleng.2018.05.048 URL
[26]	DE GENNES P G, BROCHARD-WYART F, QUÉRÉ D. Surfactants[M]//Capillarity and Wetting Phenomena. New York, NY, USA: Springer, 2004: 191-213.
[27]	CHARLES M E, REDBERGER P J. The reduction of pressure gradients in oil pipelines by the addition of water: Numerical analysis of stratified flow[J]. The Canadian Journal of Chemical Engineering, 1962, 40(2): 70-75. doi: 10.1002/cjce.v40.2 URL
[28]	DUAN J M, DENG S S, XU S, et al. The effect of gas flow rate on the wax deposition in oil-gas stratified pipe flow[J]. Journal of Petroleum Science and Engineering, 2018, 162:539-547. doi: 10.1016/j.petrol.2017.10.058 URL
[29]	DUAN J M, LIU H S, WANG N, et al. Hydro dynamic modeling of stratified smooth two-phase turbulent flow with curved interface through circular pipe[J]. International Journal of Heat and Mass Transfer, 2015, 89:1034-1043. doi: 10.1016/j.ijheatmasstransfer.2015.05.093 URL
[30]	HE G X, LI Y S, YIN B B, et al. Numerical simulation of vapor condensation in gas-water stratified wavy pipe flow with varying interface location[J]. International Journal of Heat and Mass Transfer, 2017, 115:635-651. doi: 10.1016/j.ijheatmasstransfer.2017.08.069 URL
[31]	SUN D L, YU S, YU B, et al. A VOSET method combined with IDEAL algorithm for 3D two-phase flows with large density and viscosity ratio[J]. International Journal of Heat and Mass Transfer, 2017, 114:155-168. doi: 10.1016/j.ijheatmasstransfer.2017.06.050 URL
[32]	LI J F, YU B, WANG L, et al. A mixed subgrid-scale model based on ICSM and TADM for LES of surfactant-induced drag-reduction in turbulent channel flow[J]. Applied Thermal Engineering, 2017, 115:1322-1329. doi: 10.1016/j.applthermaleng.2016.11.112 URL