塔里木油田连续油管压井探索与实践

Exploration and practice on well killing by coiled tubing in Tarim Oilfield

周建平 郭建春 张福祥 季晓红 秦世勇 张浩

ZHOU Jianping GUO Jianchun ZHANG Fuxiang JI Xiaohong QIN Shiyong ZHANG Hao

西南石油大学油气藏地质及开发工程国家重点实验室，四川成都　610500 塔里木油田分公司，新疆库尔勒　841000

State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, China

塔里木油田塔中I 号气田属于典型的高温深层高含硫碳酸盐岩气田，S 井在下完井回插管柱过程中，完井管柱底部浮阀失效，储层圈闭压力瞬间释放，导致了溢流后的井口高套压。由于该井套压高、井内管柱少、正挤压井无法挤入等特殊情况， 常规压井方式均无法实施。利用连续油管压井方案论证、现场连续油管流动测试、压井应急预案演练等方法，证实了连续油管在该井压井的可行性，通过现场连续油管压井过程中的精细施工，安全处理了溢流高套压问题并压井成功，为特殊情况下的压井作业提供了一种新的参考方法。

Tazhong I gas field of Tarim Oilfield is a typical deep carbonatite gas field of high temperature and high content of sulphur. While the string was run back after completion of Well S, the float valve at the bottom of completion string failed and the trapped pressure was released instantly, leading to high casing pressure at wellhead after well flow. This well had high casing pressure and not much down-hole string, and well killing by forward squeezing could not squeeze kill fluid into the wellbore, so conventional well killing methods could not be executed. By demonstrating the well kill method using coiled tubing, field tests on coiled tubing flow and emergency drill on well killing, the feasibility of well killing with coiled tubing was proved. Through careful well killing using coiled tubing, the problem of high casing pressure at overflow was safely addressed and the well was killed successfully, providing a new reference method for well killing jobs under special cases.

10.13639/j.odpt.2015.06.020