层内爆炸压裂岩石破碎颗粒尺寸预测与影响因素分析

Rock particle size prediction model of in-fracture explosive fracturing and influencing factor analysis

赵志红 郭建春 王辰龙

ZHAO Zhihong GUO Jianchun WANG Chenlong

“油气藏地质及开发工程”国家重点实验室·西南石油大学，四川成都　610500

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation. Southwest Petroleum University, Chengdu 610500, China

层内爆炸压裂是一种增产潜力巨大的油气藏改造技术，研究层内爆炸后破碎岩石粒径的大小对评价支撑主裂缝的导流能力具有重大意义。目前，在爆破工程中还没有可以直接应用的颗粒预测模型。借鉴爆破工程经验，利用能量守恒原理及岩石断裂理论建立了岩石破碎粒径的预测模型。实例计算层内爆炸压裂形成的岩石颗粒边长为1.23 mm，与工程爆破现场实践一致，表明本模型具有一定的参考性。通过对关键影响参数的分析，对层内爆炸压裂提出了一些建议。

The In-Fracture explosive fracturing is a new technology of reconstructing a reservoir. So study on the shattered rock size of in-fracture explosion has great significance to evaluate the capacity of the main fracture’s Conductivity. In Blasting Engineering, there is no direct prediction model used for rock particle. In this paper, according to the experience of blasting, based on the In fracture theory, and through the conservation energy principle and the theory of rock fracture, a rock crusher size prediction model is established. Study case of calculated in-fracture explosion rock particles diameter is 1.23 mm, which consistent with the practice of blasting site, and Show that this model has some validity. And through analysis of key parameters, we give advices on In-Fracture explosive fracturing.