Study on the explosive fracturing technology for low permeability reservoir

Analyzed the inadequacy of existing fracturing technology and combined with modern oil drilling technology, it discusses the rock breaking mechanism, range of application and technical features of this technology in this paper based on rock blasting theory. Then, it makes a careful analysis of stress about the surrounding rock when exploded, based on what it derived the dimension calculating formula of the crush zone and fracture zone. At last, depending on the explosive fracturing simulation tests which had been carried out with small amount of explosives, it verifies the accuracy of the dimension calculating formula. Studies show that the crushing effect is not obviously which explodes with a small amount of explosives, but it can get some clear macro-cracks; dimensions that calculated by formula which derived by this paper is basically consistent with the experimental measurements and has a reference value.