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| 天然气井下节流嘴前后压力温度分布的数值计算 | |
| 引用本文： | 蒋代君,陈次昌,伍超.天然气井下节流嘴前后压力温度分布的数值计算[J].四川大学学报(工程科学版),2006,38(6):47-50. |
| 作者姓名： | 蒋代君 陈次昌 伍超 |
| 作者单位： | 1. 四川大学,高速水力学国家重点实验室,四川,成都,610065;西华大学,机械学院,四川,成都,610039 2. 四川大学,高速水力学国家重点实验室,四川,成都,610065;西南石油学院,四川,成都,610500 3. 四川大学,高速水力学国家重点实验室,四川,成都,610065 4. 西南油气田分公司勘探开发研究院,四川,成都,610051 |
| 摘 要： | 针对天然气井安装井下节流装置以后很难测得节流嘴上游压力的情况，从空气动力学的原理出发，提出根据井口采集的数据，从节流嘴下游向上游计算其喉部和上游的压力温度综合值的数值计算方法。采用临界状态判别的新方法，即依据节流嘴出口处的马赫数的值，对节流嘴附近的流态进行判别，再分别计算节流嘴出口处，节流嘴喉部以及节流嘴上游的各参数。对宝1井进行了实例计算，计算结果表明:节流后压力温度骤降，经过激波面后压力温度急剧升高的变化情况。 |
| 关 键 词： | 天然气 井下节流 临界状态 马赫数 激波 |
| 文章编号： | 1009-3087（2006）06-0047-04 |
| 收稿时间： | 10 12 2005 12:00AM |
| 修稿时间： | 2005-10-12 |
Distribution of Pressure and Temperature in Downhole Choke of the Natural Gas Well |
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| JIANG Dai-jun,CHEN Ci-chang,WU Chao,TANG Gang.Distribution of Pressure and Temperature in Downhole Choke of the Natural Gas Well[J].Journal of Sichuan University (Engineering Science Edition),2006,38(6):47-50. | |
| Authors: | JIANG Dai-jun CHEN Ci-chang WU Chao TANG Gang |
| Affiliation: | The State Key Hydraulics Lab. of High Velocity Flows,Sichuan Univ., Chengdu 610065, China;The State Key Hydraulics Lab. of High Velocity Flows,Sichuan Univ., Chengdu 610065, China;The State Key Hydraulics Lab. of High Velocity Flows,Sichuan Univ., Chengdu 610065, China |
| Abstract: | A numerical method is established to describe the distribution of pressure and temperature in the natural gas wellbone with downhole choke from wellhead to bottom. The Mach number in the outlet of the choke is calculated and used to discriminate the flow state. Then, according to the value of the Mach number, parameters in throat and inlet of the choke are also calculated. At last,based on the preceding numeration, pressure and temperature of upstream can be solved. The computed results of Bao No.1 wellbone show that values of pressure and temperature rapid drawdown in the outlet of the downhole choke, and then quickly rising after the section of shock wave. |
| Keywords: | natural gas downhole choke critical state Mach number shock wave |
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