低渗透油藏缝网压裂可行性和井网优化研究

Study of network fracturing feasibility and well spacing in low-permeability oilfield

作为开发低渗透油藏的主要开发方式,缝网压裂技术的可行性和合理井网井距的研究十分重要。为进一步改善油田的开发效果,在详细研究Z油田地质特征和合理井网井距论证方法基础上,结合储层岩石力学和地应力场的特点,从岩石矿物成分、脆性指数等角度论证直井缝网压裂的可行性;并利用压力叠加理论和直井、压裂井地层压力分布函数,确定直井、缝网压裂井的极限技术井距,为油田缝网压裂技术的大规模开展提供一定的理论支持。

As the main development method of low-permeability reservoir, the reasonable well spacing of fracture network fracturing technique is very important. In order to further improve the oilfield development effect, based on the detailed study of Z oilfield geological characteristics and the method of well pattern spacing, combining the characteristics of reservoir rock mechanics and ground stress field, the feasibility of fracture network fracturing in vertical wells is demonstrated from the perspective of rock mineral composition and brittleness index.In addition, pressure superposition theory and pressure distribution function of vertical wells and fracturing wells are used to determine the limit technical well spacing of vertical wells and fracture network fracturing wells, providing certain theoretical support for large-scale development of fracture network fracturing technology in oilfields.