目前压裂工艺一般来说,在一个井段内只能压开一个裂缝。多裂缝压裂的任务,就是用化学的方法,解决在一个井段内(或大厚层)下一次管柱压开两条或两条以上的裂缝,更多地发挥中、低渗透层的作用,使油井增产。一、原理及方法多裂缝压裂是在正常压裂完一个层后,停泵降压(只留一二台压裂车继续替挤),使压开层的裂缝合并,压力稳定后,在低压、低排量下继续挤入带暂时性封堵球的压裂液(用原油作压裂液时,要用火油携带暂时性封堵球,以防封堵球受热融化)。因压开层吸水量大,绝大部分封堵球进入压开层的炮眼,将该层堵死。继续压裂时,因压开层被 At present, the fracturing process generally can only open a crack in a well section. The task of multi-fracture fracturing is to use chemical methods to solve the problem of cracking two or more cracks in the next pipe string in one well section (or large thick layer), and using more of the medium- and low-permeability layers Role, the oil well stimulation. First, the principle and method Multi-fracture fracturing is a layer in the normal fracturing, pump stop buck (leaving only one or two fracturing vehicles continue to squeeze), so that cracks in the pressure of open layer merger, the pressure is stable, the Low pressure, low displacement continue to squeeze into the temporary sealing ball fracturing fluid (with crude oil for fracturing fluid, the use of oil to carry a temporary plug ball to prevent the sealing ball heated to melt). Due to the pressure of water absorption layer, the vast majority of blocking the ball into the pressure of the open hole, blocking the layer. When fracturing continues, the pressure is released