西南石油大学学报(自然科学版)

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Application Research on A New Technology of Shifting Sleeves

Shi Lei   

  1. Downhole Operation Projection Company,Chuanqing Drilling Engineering Co. Ltd.,PetroChina,Chengdu,Sichuan 610051,China
  • Online:2014-02-01 Published:2014-02-01

Abstract:

With the rapid development of horizontal well drilling technology,the staged reservoir stimulation technology and
supporting tools of horizontal wells has become increasingly popular. As a component of the staged reservoir stimulation tool
to communicating reservoir and wellbore,shiftable sliding sleeves are used to stimulate reservoir and to improve oil,gas and
water management throughout the life of the well. Because of the large shifting force and extended reach required to operate
sliding sleeves in horizontals,the coiled tubing(CT)is typically used for sleeve management. But there is some uncertainty to
ensure sleeve shifted successfully by observing the change of surface load and there is a possibility of misuse. At the same time,
this method can’t determine the sleeve position,so if the operation is not fully in place,CT operation was needed again. To
solve this problem,this paper introduces a new shifting tool which is connected by CT with fiber. This tool can shifting sleeve
by locating sleeve position precisely and monitoring string load,pressure and temperature in the downhole;by processing and
interpreting the measurement data on the ground,the operators can judge the situation downhole accurately and switch sleeves
reliably. It also can determine sleeve position by the change of CCL curve to save a lot of cost and time caused by operational
errors.

Key words: sliding sleeve, shifting tool, CT with fiber, real-time monitoring, bottomhole locating