基于FLUEN的双台阶水平井水嘴选择方法研究与应用
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摘要
为了实现超深双台阶水平井分层注水工艺中的水嘴快速、准确选择,提出一种基于FLUENT的水嘴选择方法,采用FLUENT软件对配水器通道压降、不同孔径、不同流量下的水嘴压降进行模拟,形成孔径、流量、压差数据库,然后采用无量纲化处理方法建立水嘴三参数单曲线拟合公式,摒弃水嘴流通系数影响,实现已知过流量、压差,准确计算水嘴直径。现场2口双台阶水平的应用结果表明,该方法可快速准确完成配水器水嘴选择,一次选择成功率100%、单层配水精度提高了6倍,该项水嘴选择方法适用于井下所有圆形孔板类水嘴的选择。
To realize a quick accurate choke selection for stage water-injection operations in 2-stage horizontal wells,a method based on FLUENT simulation is proposed in this paper.FLUENT software was used to simulate the pressure drop at different distributor channels,the pressure drop at different orifice diameters and different flow rates. With this database of choke diameter,flow rate,pressure drop,a single-curve 3-parameter fitting formula for choke selection is set up by using dimensionless treatment. The choke diameter can be accurately calculated from known flow rates and pressure drop,eliminating the effectsof discharge coefficient. Application in 2 horizontal wells prove this choke selection method can ensure a 100% choke selection success, single-layer water distribution accuracy increased 6times,and is suitable for selection of all downhole circular orifices.
To realize a quick accurate choke selection for stage water-injection operations in 2-stage horizontal wells,a method based on FLUENT simulation is proposed in this paper.FLUENT software was used to simulate the pressure drop at different distributor channels,the pressure drop at different orifice diameters and different flow rates. With this database of choke diameter,flow rate,pressure drop,a single-curve 3-parameter fitting formula for choke selection is set up by using dimensionless treatment. The choke diameter can be accurately calculated from known flow rates and pressure drop,eliminating the effectsof discharge coefficient. Application in 2 horizontal wells prove this choke selection method can ensure a 100% choke selection success, single-layer water distribution accuracy increased 6times,and is suitable for selection of all downhole circular orifices.
引文
[1]SY/T5906-2003,配水嘴嘴损曲线图版制作方法[S].2003.
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[3]郑举,刘长龙,徐兴安,等.多水嘴配注技术嘴损试验研究[J].石油矿场机械,2014,43(7):37-40.
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[5]蒋国栋,李宏魁,王显章,等.非均质油藏分层配注水嘴优先方法研究[J].石油机械,2012,40(1):9-12.
[6]韩承骋,陈雷,孟康,等.桥式偏心分层注水水嘴选配方法研究[J].断块油气田,2013,20(6):659-662.
[7]韩洪升,付金辉,王春光,等.分层注水井配水嘴嘴损曲线规律实验研究[J].石油地质与工程,2008,22(2):79-81.
[8]仲如冰.水平井3段集成分段注水技术研究[J].石油机械,2013,41(7):67-69.
[9]赵鹏睿,吕敬波.分层注水水嘴的应用[J].试验研究,2014,33(6):38.
[2]申晓莉,于九政,王子建.新型小流量水嘴的设计与数值模拟[J].石油钻采工艺,2013,35(1):83-86.
[3]郑举,刘长龙,徐兴安,等.多水嘴配注技术嘴损试验研究[J].石油矿场机械,2014,43(7):37-40.
[4]孔宪辉,卢德唐,林春阳.配水器流场的数值模拟[J].水动力学研究与进展,2007,22(1):1-8.
[5]蒋国栋,李宏魁,王显章,等.非均质油藏分层配注水嘴优先方法研究[J].石油机械,2012,40(1):9-12.
[6]韩承骋,陈雷,孟康,等.桥式偏心分层注水水嘴选配方法研究[J].断块油气田,2013,20(6):659-662.
[7]韩洪升,付金辉,王春光,等.分层注水井配水嘴嘴损曲线规律实验研究[J].石油地质与工程,2008,22(2):79-81.
[8]仲如冰.水平井3段集成分段注水技术研究[J].石油机械,2013,41(7):67-69.
[9]赵鹏睿,吕敬波.分层注水水嘴的应用[J].试验研究,2014,33(6):38.