金坛地下储气库盐腔偏溶与井斜的关系

Relationship between salt cavern partial melting and well deviation of Jintan Underground Gas Storage

在金坛储气库造腔过程中,盐腔偏溶问题层出不穷,对腔体体积、造腔进度、注气排卤、运行安全等的不良影响不容小觑。为此,对金坛储气库28口造腔井的声呐数据、连斜数据、管柱提升记录、施工记录和原始溶腔设计等资料进行统计分析。结果表明:金坛储气库多口盐井偏移方向规律明显,大多偏北,少数偏南;多数盐腔偏溶方向与井轨迹偏移方向一致。由此提出盐腔偏溶与井斜有着密不可分的关系,并初步认定地应力对盐腔偏溶起到一定作用。

In the cavity building process of Jintan Underground Gas Storage,salt cavern partial melting emerges frequently,which brings significantly adverse effects on the cavern volume,progress of cavity building,gas injection and brine discharge,and operational safety.Therefore,sonar data,continuous inclinometer data,string ascension records,as-built records,the original cavern design and other information of 28 cavity building wells in Jintan Underground Gas Storage are statistically analyzed.The results show that the offset directions of many wells of Jintan Underground Gas Storage are clear that are mostly northward and locally southward;the salt cavern partial melting direction is usually consistent with the well trajectory offset direction.Thus,it is proposed that salt cavern partial melting and well deviation have a close relationship,and it is initially determined that ground stress has a certain effect on salt cavern partial melting.