“层内爆炸”技术用硝基甲烷改性液体炸药的配方研究

Formulation of Modified Nitromethane Liquid Explosives Using Stimulation Technology of Exploding in Fracture

根据＂层内爆炸＂技术对液体炸药理化性能、安全性能和爆轰性能的要求,采用单因素法对硝基甲烷液体炸药进行改性研究,确定硝基甲烷改性液体炸药配方的质量分数为：硝基甲烷76%、乙二胺5%、醋酸纤维素5%、片状铝粉14%。该配方硝基甲烷改性液体炸药的主要性能指标为：黏度1342 m Pa·s,pH值8.0,挥发率2.0%,机械感度0,临界传爆直径2.5-3.0 mm,爆容662 L/kg,爆热5749 kJ/kg,爆速4233 m/s,满足＂层内爆炸＂技术开采低渗透油气藏的使用要求。

The research on the modification of nitromethane explosive using the single factor was performed and the optimum formulation of modified nitromethane liquid explosive with nitromethane 76%,ethylenediamine 5%,cellulose acetate 5%,aluminum powder 14%（ mass fraction） was confirmed,based on the requirements of stimulation technology of exploding in fracture for the safety,physic-chemical properties and detonation of liquid explosive. The main properties of this modified nitromethane liquid explosive include viscosity 1342 m Pa · s,p H value 8. 0,volatilization ratio 2. 0%,mechanical sensitivity 0,critical diameter of booster less than 2. 5-3. 0 mm,detonation volume 662 L / kg,explosion heat5 749 k J / kg,and detonation velocity 4 233 m / s. The results show that its properties met the requirements of stimulation technology of exploding in fracture to produce oil or gas in low-permeability reservoir.