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  

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

作　　者：吴晓东[1] 吴晗[1] 韩国庆[1] 张庆生[2] 陈勇光[2] 

机构地区：[1]中国石油大学(北京).石油工程教育部重点实验室 [2]中国石化中原油田采油工程技术研究院

出　　处：《天然气工业》2011年第9期69-72,137-138,共4页Natural Gas Industry

基　　金：国家科技重大专项"高含硫气井生产系统节点分析"(2008ZX05017-003-03-03HZ)

摘　　要：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。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,and the DPR model combined with the WA Correction and the Dempsey model combined with the Standing Correction are proposed for the calculation of the compressibility factor and viscosity of sour gases.Besides,according to the theories of heat transfer and gas-solid two phase flow,a new model is presented for calculating the pressures and temperatures considering the sulfur release in wellbores.By use of this new model,the temperatures,pressures,and the particle volumes of the precipitated sulfur solids were calculated in a real case study of a sour gas well.As a result,the maximum errors between the calculated pressures and temperatures and the actual values were 2.67% and 2.32% respectively.This case study demonstrates that this new model is applicable for the calculation and analysis of pressures,temperatures,and the particle volumes of the precipitated sulfur solids of high-H2S gas wells.

关 键 词：高含硫气井 井筒 硫颗粒 气 固两相 温度 压力 数学模型 

分 类 号：TE377[石油与天然气工程—油气田开发工程]