考虑井筒硫析出的高含硫气井井筒温度、压力场计算新模型

在高含硫气井的日常管理及气井设计、动态分析中，井筒压力、温度分布是两个重要的参数，而气体中富含H₂S和CO₂以及流动过程中硫颗粒的析出是导致高含硫气井井筒温度、压力分布计算偏差的两个关键因素。为此，以实验数据为基础，对物性参数计算方法进行优选，提出了采用DPR模型结合WA校正法和Dempsey模型结合Standing校正法作为计算高含硫天然气压缩因子和黏度的模型，根据传热学和气-固两相流动理论，建立了考虑井筒硫颗粒析出的井筒温度、压力分布计算新模型。运用该模型对某高含硫气井井筒温度、压力、井筒析出硫颗粒体积进行了计算，温度、压力的计算值与实测值最大误差分别为2.67%和2.32%，表明新模型计算精度较高，适用于高含硫气井井筒温度、压力分布和析出硫颗粒体积的计算与分析。

A new model for calculating wellbore temperature and pressure distribution of a high-H_2S gas well considering the influence of the sulfur release in wellbores

The distribution of the pressures and temperatures are important parameters for the daily management,design and dynamic analysis of a high-H2S gas well.For the said two parameters,rich contents of H2S and CO2 in the sour gas and the sulphur solids precipitated in wellbores are two key factors resulting in the errors of the calculation of the pressures and temperatures of such a gas well.In view of this,based on the experimental data,the calculation methods for petrophysical properties are optimally selected...