2
∞
7
年第
31
卷
第
4
期
文章编号:
1673-5005 (2007
)04
-00
94
-04
中国石油大学学报(自然科学版)
Joumal
of China University of Petroleum
VoL
31
No.4
Aug.2007
井下旋流油气分离器流场数值模拟
赵焕卿李增亮
2
孙浩玉
3
(1.中国石油大学科技开发公司,山东东营
257061;
2.
中国石油大学机电工程学院,山东东营
257061;
3.
胜利石油管理局钻井工艺研究院,山东东营
257017
)
摘要:鉴于现有油气分离器效率较低,为改善高含气井中井下多相混抽泵或电潜泵机组效率低下的问题,选择雷诺
应力模型作为漏流模型,代数滑移混合模型作为多相流模型,对井下水力旋流油气分离器内的两相流场进行了数值
模拟。通过数值计算得到了两相介质等浓度分布图和轴向速度矢量图,并将数值计算结果与同结构的水力旋流油
气分离器样机的室内模拟试验结果进行了对比。研究结果表明,数值计算得到的各种图完全符合已知的旋流器流
场分布规律。水力旋流器经过结构优化设计不仅可以进行井下油气分离,且分离效果较好,适用于较大流量和高含
气率的油井条件。
关键词:油气分离;水力旋流器;分离效率;数值模拟
中图分类号
:TQ
05
1.
8
文献标
i
只码
:A
Numerical simulation of
flow
field in downhole
hydrocyclone oil-gas separator
ZHAO
Hllan-qing
1
,
LI
Zeng-liang
2
,
SUN
Hao-Y
1l
3
(
1.
Scientif
r,c
and Technological Company in China University
of
Petroleum , Dongying 257061 , Shandong Province , China;
2.
College
of
Mechanical and Electronic Engineering in China University
of
Petroleum ,
Dongying 257061 , Shandong
Pn
ω
ince
,
China;
3. Drilling Technology Research Institute
, Shengli Petroleum Administration Bureau , Dongying 257017 ,
Shandong Province , China)
Abslracl:
As the efficiency of the current oil-gas separators is very
low
, and to improve the efficiency of downhole multiphase
purnp or electrical submersible pumping unit in high gas-content wells
, the numerical simulation was studied on the two-phase
flow in downhole hydrocyclone oil-gas separator. Meanwhile , the Reynolds stress model was chosen as turbulence model and
the algebraic slip model was chosen as multiphase flow modeL With the numerical calculation , the two phase media equocon-
centration distribution map and the axial velocity vectogrph were obtained and proved to completely accord with the
flow
field
distribution
in
cyclone. A contrast between the nurnerical simulated result and the result of pre-industrial prototype which has
the sarne structure was carried on. The results show that the optimized hydrocyclone oil-gas separator not only runs well but
also possesses good separating perforrnance , and
can
satisfy the requirement of high flux and high GOR wells
Key
words:
oil-gas separation; hydrocyclone; separation efficiency; numerical simulation
随着油田的深入开发,尤其是注水滞后单元和
高油气比区块,地层能量降低、油层脱气,高含气井
将不断增多。当含有大量游离气的井液进入多相渴
抽泵或潜油电泵时,会造成泵排量、扬程和效率显著
收稿日期
:2
∞
7
-03-
归
下降,机组出现严重欠载等现象。为消除井液中游
离气对多相泪抽泵或潜油电泵性能的影响,可在泵
的人口处安装油气分离器,尽量多地排除游离气。
现有的油气分离器对于改善井下叶片式泵的吸人性
基金项目:中国石油天然气股份有限公司科技风险创新基金资助项目
(050511
-ó -2
)
作者简介:赵焕卿(1
963
- )
,男(汉族)
,河南{医师人,高级工程师,工程硕士,从事石油机械的研究与开发工作。