高气液比气井井底流压计算方法研究

Study on computing method of bottom-hole flow pressure of gas well with high gas-liquid ratio

童敏 齐明明 马培新 王保民

TONG Min QI Ming-ming MA Pei-xin WANG Bao-min

中国石油勘探开发研究院, 北京 100083 振华石油控股有限公司, 北京 100031 冀东油田公司基建工程部, 河北 唐海 063200

为解决高气液比气井井筒温度分布和压力计算精度低、计算方法可用性差的问题,运用热力学、传热学以及两相流理论,对气井稳定连续生产时的流动特征和传热过程进行分析,采用Beggs和Brill普适化相关式,结合Kelessidis和Dukler流型判别方法及温度分布计算模型,建立高气液比气井井底流压计算模型并针对新疆一口气井进行求解。在高气液比情况下,计算得到的温度分布及井底流压与油田现场测试数据对比,平均相对误差仅为3%,表明了文中的温度模型以及压力计算方法具有较高的精确性。模型计算所需参数容易得到,具有较好的实用性,可大面积推广应用。

To the high gas-liquid ratio gas well,results of wellbore temperature distribution and bottom hole flow pressure from some methods are with low accuracy,and some methods with high accuracy could not be used conveniently.In order to solve such problems,flow characteristics and heat transfer of continuous steady production were analyzed based on heat transfer,thermodynamics and multiphase flow theory,and a computing module for bottom-hole flow pressure calculation of high gas-liquid ratio gas well was established where Beggs-Brill formula,Kelessidis-Dukler flow pattern discriminance and a temperature distribution computing method are included.The method had been applied to a gas well in Xinjiang.Comparing to test data,results of temperature distribution and bottom hole flow pressure from this theoretical model have good accuracy and the averaged error is only 3%.In the meanwhile,parameters needed for calculation can be obtained easily.

10.3969/j.issn.1000-7393.2006.04.022