摘要
低渗油藏往往采用水平井压裂的方法来提高油层产能,由于地质条件复杂及多形态的断层发育,使得水平井压裂裂缝参数对压裂效果起着决定性的作用,而常规模拟水平井压裂的方法不能很好地描述裂缝形态。为了提高模拟水平井压裂裂缝的精度,提出了应用新型非结构网格—PEBI网格模拟水平井压裂裂缝参数,实现水力裂缝的精确模拟和裂缝参数的准确优化,与常规笛卡尔网格方法进行对比,体现出PEBI网格模拟水平井压裂裂缝的优越性。得到优化的裂缝系数:最优裂缝间距100～120 m,最优裂缝条数5条,最佳裂缝长度110～130 m。
Horizontal well fracturing method is usually applied to increase reservoir productivity in lowpermeability thin layer reservoir development. Due to complex geological conditions and many forms of fault development,horizontal well fracturing fracture parameters play a decisive role in fracturing effect and conventional simulation method of horizontal well fracturing can not describe fracture morphology fully. For this reason,a new unstructured grid—PEBI grid maybe applied to simulate horizontal fracturing well fracture parameters and realize accurate simulation of hydraulic fracture and optimization of fracture parameters. Results of comparison with conventional Cartesian grid refinement methods showthat simulation ofhorizontal fracturingwell fractures byPEBI grid has advantage.
出处
《天然气与石油》
2013年第1期57-59,3,共3页
Natural Gas and Oil
基金
国家重大专项"低渗
特低渗透油气田经济开发关键技术"资助(2008ZX05013)
关键词
低渗油藏
PEBI网格
裂缝参数优化
水平井
笛卡尔网格
Low permeability reservoir
PEBI grid
Fracturing parameter optimization
Horizontal well
Cartesian grid
