高含硫气井井筒硫沉积预测  

Prediction of sulfur deposition in wellbore of high sulfur gas well

作　　者：杜敬国[1] 蒋建勋[2] 葛静涛[3] 董桂玉[1] 张伟华[1] 王兆生[1] 

机构地区：[1]河北联合大学矿业工程学院,河北唐山063009 [2]西南石油大学石油工程学院,四川成都610500 [3]中国石化华东石油局,江苏南京210000

出　　处：《断块油气田》2014年第1期129-132,共4页Fault-Block Oil & Gas Field

基　　金：河北自然科学基金"混合沉积及其油气地质意义探讨--以饶阳凹陷蠡县斜坡沙河街组为例"(D2013209045);河北省科技计划项目"南堡凹陷柳赞地区沙一段混合沉积研究"(12274203)

摘　　要：随着高含硫气藏的开发,析出的硫会对储层造成伤害,影响气井的正常生产,因此,准确预测硫的沉积对酸性气田的合理高效开发具有十分重要的意义。文中根据气、液、固三相流动规律,建立了高温高压高含硫气井井筒硫沉积预测模型,利用缔合模型的基本原理,建立包含温度、压力和流态3个变量的硫溶解度函数模型,用来预测硫在井筒中的析出位置;再利用缔合模型的相关理论解释硫元素在井筒中的溶解机理,以温度、压力和硫溶解度为变量,判断单质硫是否沉积、沉积位置,并对沉积量进行动态计算。以普光气田×井为例,计算得出硫溶解度和析出量随井筒的变化规律,其结果与实际情况吻合较好。With the development process of high sulfur gas reservoir, the sulfur deposited will damage to formation and the sulfur deposition in wellhore will affect the normal production of gas well. Therefore, the accurate prediction of sulfur deposition has very important significance for the reasonable and efficient development of sour gas field. According to the three-phase flow law of gas, liquid and solid, the prediction model of sulfur deposition in wellbore is established for the high sulfur gas well with high temperature and high pressure. Using the basal principle of coupling model, the sulfur solubility function model is huih, including three variables such as temperature, pressure and flow condition. This model can be used to predict sulfur precipitation location in well. The correlation theory of association model is used to interpret the dissolution mechanism of sulfur in wellbore and the sulfur deposition position and deposition quantity are simulated taking the temperature, pressure and solubility as variables. Finally, taking one well in Puguang Gas Field as an example, the change law of sulfur solubility and precipitation amount as wellbore is calculated, having a good matching with the actual result.

关 键 词：高含硫气藏 硫沉积 硫溶解度 温度压力缔合模型 

分 类 号：TE37[石油与天然气工程—油气田开发工程]