大排列微地震实时监测技术在页岩油水力压裂中的应用

Application of large⁃array microseismic real⁃time monitoring technique in hydraulic fracturing of shale oil

页岩油是重要的国家战略资源。在中国,以陆相页岩油为主,特别是济阳凹陷,页岩储层地质条件复杂,常用的裂缝识别技术包括蚂蚁体、相干体和曲率体等,无法满足精度要求,开采面临巨大挑战。为了加快页岩油的开发,在樊页1井组页岩油示范区开展基于大排列微地震实时监测,通过闭环优化过程进行施工参数迭代和技术方案优化。根据微地震震源参数,提出了计算储层改造体积和裂缝复杂性指数的新方法,用于定量评估储层改造波及范围和裂缝的复杂性。文中主要描述了在樊页1井组页岩油示范区开展的基于大排列微地震实时监测技术的地质工程一体化实践,所取得的认识和经验具有一定的借鉴价值。

Shale oil is an important strategic resource for the country.The main type of shale oil in China is con-tinental shale oil,especially in the Jiyang Sag.The geological conditions of the shale reservoir are complex,and the commonly used fracture identification techniques,including ant tracking,coherence volume,and curvature volume,cannot meet the accuracy requirements,thus posing a huge challenge to exploitation.In order to accelerate the development of shale oil,large-array microseismic real-time microseismic monitoring technology has been deployed in the shale oil demonstration area of the Fanye 1 well group,and construction parameter iteration and technical scheme optimization are carried out through closed-loop optimization.A new method for stimulated reservoir volume(SRV)and fracture complexity index(FCI)based on microseismic source pa-rameters was proposed to quantitatively evaluate reservoir stimulation and hydraulic fracture.This article mainly describes the geological engineering integration practice based on large-array microseismic real-time monitoring technique in the shale oil demonstration area of the Fanye 1 well group.The obtained knowledge and ex-perience have a valuble reference.