煤层气井压裂后快速返排技术研究及应用

Research and Application of Rapid CBM Well Fracturing Flowback Technology

煤层气井压裂后返排技术对煤层气井产气量起到至关重要的作用。针对煤层气井压裂液伤害的特点,通过对煤层气压裂工艺原理、水锁伤害及水敏伤害的研究,在柳林区块选取3口井进行试验。认为利用控制放喷的手段,在控制出砂的条件下,短时间内尽快多地返排出压裂液有利于煤层气产气。

The back-flow plays a key role in gas production in the CBM well after fracturing. According to characteristics of fracturing fluid damage in coalbed methane well,through principle of coalbed gas fracturing technology,water lock damage and water sensitivity damage,three wells were applied in the study. It is believed that rapid back-flow is beneficial to gas production of coal-bed methane ,and by using the method of controlled release,fracturing fluid is discharged as soon as possible in shortest time.