利用控制头酸化测试联作的新方法

A New Method for Acid-DST Combined Operation Using a Control Head

采用采油树进行酸化作业，安全可靠，但在原钻机试油过程中，采用采油树酸化作业工作量大而繁重，存在一些不便之处。利用控制头替代采油树酸化作业，可以解决困扰酸化施工时来回倒换井口的难题，并且可以缩短试油周期，减少管柱起下钻次数，为含硫化氢油气井的施工提供了安全保障。1997年以来，在塔中26井、塔中126井利用控制头实施酸化作业并获得成功，为酸化测试联作及超深高含硫井的施工积累了实际经验。

People usually adopt christmas tree in acid job, the operation is safe and reliable. But during drill stem test on drilling rig, acidizing with a christmas tree requires a great deal of heavy work, and it is also inconvenient, to replace the christmas tree with a control head for acid job may solve the difficult problem of rotating wellhead,which has puzzled the acid job, moreover, the technique provides safeguard for operation at sour content wells due to shorter test period and less string trips. Since 1997,acidizing operation with a control head has been per formedat well Tazhong 26 and well Tazhong 126,the operation was successful at well Tazhong 126,an ultra-deep sour content well, which has accumulated practical experience for combined operation of DST-acidizing with a control head and operation in ultra-deep sour content wells.