Application of separate layer fracturing with salvage sliding sleeve in Honghe oilfield

Honghe oilfield has the characteristics of low porosity, ultra-low permeability and natural fracture growth. Open-hole packer staged fracturing technology was mainly conducted in the early development stage, which is subjected to complex process of drilling sweep ball seat and difficult construction of secondary reformation. Through salvage sliding sleeve fracturing process test, the shaft diameter can be realized in whole wellbore, which provides technical support for the secondary transformation and interference factors analysis. The tube-string structure, technique characteristics and operation process of salvage tools were introduced in this paper, and pilot test was carried out in Well HH37P32. Field application shows that this fracturing technology can effectively implement stimulation for horizontal wells, and improve the fracturing effect of low permeability reservoir.