高含水稠油预分离用分离器水力特性研究
|
摘要
高含水稠油采出液使水处理工作量不断增大,传统水处理设备对于稠油预分离效率低,这导致油田生产成本急剧增长。为此,开发了导叶型轴向入口式分离器。对导叶型轴向入口式分离器内高含水稠油两相湍流进行数值模拟,得到了水力旋流器内两相流场的速度分布和压力分布特征,并且研究了稠油黏度对分离性能的影响。研究结果表明:当稠油黏度由50 mPa·s增长到750 mPa·s时,分离效率降低7.51%,降幅为8.40%,压降损失仅增长0.064 MPa。导叶型轴向入口式分离器对于黏度的敏感度很小,适用范围更广,对于稠油的地面集输工程具有重要意义。
The high water-cut heavy oil increases the water treatment work load,and the traditional water treatment equipment has low efficiency of pre-separation of heavy oil,which leads to the rapid increase of oilfield production cost. In view of this,the guide vane type axial entrance hydrocyclone has been developed. The two-phase turbulence flow of the high water cut heavy oil in the new developed hydrocyclone has been numerically simulated. The velocity distribution and pressure distribution of the two-phase flow field in the hydrocyclonehave been attained. The effect of heavy oil viscidity on the separation performance has been studied. It was found that when the viscosity of heavy oil increased from 50 m Pa·s to 750 m Pa ·s,the separation efficiency decreased 7. 51%with the reduction rate of 8. 40%,and the pressure loss increased by only 0. 064 MPa. The guide vane type axial entrance hydrocyclone has very low sensitivity on the viscosity and presenting a wider range of applications,which is of great importance for the ground gathering and transportation of heavy oil.
The high water-cut heavy oil increases the water treatment work load,and the traditional water treatment equipment has low efficiency of pre-separation of heavy oil,which leads to the rapid increase of oilfield production cost. In view of this,the guide vane type axial entrance hydrocyclone has been developed. The two-phase turbulence flow of the high water cut heavy oil in the new developed hydrocyclone has been numerically simulated. The velocity distribution and pressure distribution of the two-phase flow field in the hydrocyclonehave been attained. The effect of heavy oil viscidity on the separation performance has been studied. It was found that when the viscosity of heavy oil increased from 50 m Pa·s to 750 m Pa ·s,the separation efficiency decreased 7. 51%with the reduction rate of 8. 40%,and the pressure loss increased by only 0. 064 MPa. The guide vane type axial entrance hydrocyclone has very low sensitivity on the viscosity and presenting a wider range of applications,which is of great importance for the ground gathering and transportation of heavy oil.
引文
[1]刘洪,郭清,胡攀峰,等.国内外液-液水力旋流分离器研究进展[J].钻采工艺,2007,30(3):78-81.
[2]张朝晖.国内外稠油开发现状及稠油开发技术发展趋势[D].北京:中国石油勘探开发研究院,2005.
[3]代佳鑫.井下导流式旋流器研究[D].大庆:东北石油大学,2014.
[4]史仕荧.管道式导流片型分离器油水分离性能研究[D].北京:中国科学院大学,2013.
[5]SHI S Y,WU Y X,ZHANG J,et al.A study on separation performance of a vortex finder in a liquid-liquid cylindrical cyclone[J].Journal of Hydrodynamics,2010,22(5):391-397.
[6]陈世琢.紧凑型轴流导叶式除油旋流器流场模拟及实验研究[D].大庆:大庆石油学院,2010.
[7]贺会群,杨振会,吴刚,等.油水旋流分离器流场模拟分析与研究[J].石油机械,2005,33(12):1-5.
[8]宋民航.新型导叶式水力旋流器设计与结构优选[D].大庆:东北石油大学,2013.
[9]黄敏,李芳田,史足华.稠油降黏剂DJH-1[J].油田化学,2000,17(2):137-139.
[10]罗然,张伟,王家辉,等.用CFD确定物性参数对井下油水分离效率的影响[J].石油和化工设备,2010,13(6):23-26.
[2]张朝晖.国内外稠油开发现状及稠油开发技术发展趋势[D].北京:中国石油勘探开发研究院,2005.
[3]代佳鑫.井下导流式旋流器研究[D].大庆:东北石油大学,2014.
[4]史仕荧.管道式导流片型分离器油水分离性能研究[D].北京:中国科学院大学,2013.
[5]SHI S Y,WU Y X,ZHANG J,et al.A study on separation performance of a vortex finder in a liquid-liquid cylindrical cyclone[J].Journal of Hydrodynamics,2010,22(5):391-397.
[6]陈世琢.紧凑型轴流导叶式除油旋流器流场模拟及实验研究[D].大庆:大庆石油学院,2010.
[7]贺会群,杨振会,吴刚,等.油水旋流分离器流场模拟分析与研究[J].石油机械,2005,33(12):1-5.
[8]宋民航.新型导叶式水力旋流器设计与结构优选[D].大庆:东北石油大学,2013.
[9]黄敏,李芳田,史足华.稠油降黏剂DJH-1[J].油田化学,2000,17(2):137-139.
[10]罗然,张伟,王家辉,等.用CFD确定物性参数对井下油水分离效率的影响[J].石油和化工设备,2010,13(6):23-26.