平衡压差解卡法在渤海油田井下作业中的应用
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摘要
井下作业中,起管柱提不动时一般采用对防砂段以上管柱进行切割,起出切割点以上管柱后再打捞防砂段生产管柱,因打捞的不确定性,导致修井工期延长而增加了费用。此文通过对井下状况的分析,认为生产层封隔器上下的压差产生的吸附力是主要的原因,通过打开井筒与地层通道,解除地层对井筒管柱的吸附压差,成功打捞,节省了工期和费用,为以后类似解卡的井下作业提供了借鉴。
When a fishing operation is needed for a well in which the production string is stuck,the first step is cutting the string above the sticking point and then fishing the left production string in the screen.Due to the uncertainty in fishing operation,the increase in working duration will result in the increase in the cost for a well.Based on the analysis of the down-hole condition,the authors speculated the main cause was the absorption force produced by the differential pressure above and below the production packer.The fishing was successfully completed in a short time by opening the wellhole with the reservoir and releasing the differential pressure between the formation and the string,which reduced the working duration and cost and provides the valuable reference for the similar down-hole operation in the future.
When a fishing operation is needed for a well in which the production string is stuck,the first step is cutting the string above the sticking point and then fishing the left production string in the screen.Due to the uncertainty in fishing operation,the increase in working duration will result in the increase in the cost for a well.Based on the analysis of the down-hole condition,the authors speculated the main cause was the absorption force produced by the differential pressure above and below the production packer.The fishing was successfully completed in a short time by opening the wellhole with the reservoir and releasing the differential pressure between the formation and the string,which reduced the working duration and cost and provides the valuable reference for the similar down-hole operation in the future.
引文
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[4]谢鑫.压差卡钻的控制方法[J].国外油田工程,2010,26(12):45-47.
[5]刘晓波.降压解除压差卡钻在海上某井中的应用[J].石化技术,2015(1):10.
[2]叶庆峰.深井大修打捞解卡工艺技术与应用[J].工业,2015,26(12):226.
[3]聂海光,王新河.油气田井下作业修井工程[M].北京:石油工业出版社,2002.
[4]谢鑫.压差卡钻的控制方法[J].国外油田工程,2010,26(12):45-47.
[5]刘晓波.降压解除压差卡钻在海上某井中的应用[J].石化技术,2015(1):10.