日输量对分注工具内流体压降影响计算
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摘要
为了明确日输量对环形降压槽内聚合物溶液沿程阻力损失影响及规律、提高分层注采效率。结合流体力学理论,分别针对日输量为50、75、100、125、150、200 m~3,密度为998 kg/m~3,粘度为75 m Pa·s的聚合物溶液进行计算,在同一规格降压槽中比较沿程阻力损失的大小,分析影响规律。计算结果表明:不同日输量对流经同一环形降压槽的聚合物溶液流态影响不大,雷诺数十分接近,仅200 m~3时处于层流紊流混合区;环形降压槽压力损失与管壁粗糙度无关,与日输量、输送介质密度、粘度等因素有关;随着日输量上升环形降压槽管壁沿程阻力损失不断增加,但增加速度逐渐降低。
In order to determine the influence of daily transportation amount on the frictional resistance loss of the polymer solution along the path and its law in the annular pressure reducing tank, and to improve the efficiency of the injection production, according to the theory of fluid mechanics, the frictional resistance loss of the polymer solution with density of 998 kg/m3 and viscosity of 75 m Pa·s was calculated under daily transportation amount of 50, 75, 100, 125, 150 and 200 m3,respectively. The frictional resistance losses in the same pressure relief groove under different daily transportation amount were compared, and the influence rule was analyzed. Calculation results show that: different throughput has little effect on the flow state of polymer solution flowing through an annular pressure relief groove, their Reynolds numbers are very close; pressure loss in the annular pressure relief groove is entirely unrelated to the pipe wall roughness, and is related to throughput, transmission medium density, viscosity and other factors; with increasing of the throughput, annular pressure relief groove pipe wall friction loss increases, but the increase rate decreases gradually.
In order to determine the influence of daily transportation amount on the frictional resistance loss of the polymer solution along the path and its law in the annular pressure reducing tank, and to improve the efficiency of the injection production, according to the theory of fluid mechanics, the frictional resistance loss of the polymer solution with density of 998 kg/m3 and viscosity of 75 m Pa·s was calculated under daily transportation amount of 50, 75, 100, 125, 150 and 200 m3,respectively. The frictional resistance losses in the same pressure relief groove under different daily transportation amount were compared, and the influence rule was analyzed. Calculation results show that: different throughput has little effect on the flow state of polymer solution flowing through an annular pressure relief groove, their Reynolds numbers are very close; pressure loss in the annular pressure relief groove is entirely unrelated to the pipe wall roughness, and is related to throughput, transmission medium density, viscosity and other factors; with increasing of the throughput, annular pressure relief groove pipe wall friction loss increases, but the increase rate decreases gradually.
引文
[1]李俊成,杨亚少,许莉娜,张玉秋.低渗透油藏分层注采对应技术研究与试验[J].石油天然气学报,2014(05):141-144+8-9.
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[5]黄斌,徐德奎,蔡萌,周万富,李朦,付思强,吴天奇,傅程.基于正交试验法和数值仿真的环形降压槽结构优化[J].数学的实践与认识,2014(22):96-102.
[2]郑永令.流体流动状态与伯努利方程[J].大学物理,1994(08):1-4.
[3]张维志.等温管道层流与紊流临界状态值的分析[J].油气储运,1995(02):10-12+65-4.
[4]李成佳.同心环形断面管道的流速和流量公式的一般形式[J].辽宁建筑工程学院学报,1982(01):105-108.
[5]黄斌,徐德奎,蔡萌,周万富,李朦,付思强,吴天奇,傅程.基于正交试验法和数值仿真的环形降压槽结构优化[J].数学的实践与认识,2014(22):96-102.