ABSTRACT
In recent years, the shortage of oil/gas resources becomes a common problem which restricts the development of the global economy; it pays attention to unconventional resources in many countries (Zhang Wei et al. 2013). There is a rich unconventional oil resource in China, about (70~90) × 108 t. The tight sandstone oil/gas is the most realistic unconventional resources (Zhou Liqing et al. 2011). Tight sandstone are usually characterized with natural fractures which affect the fractured well productivity (Li Daoping. 1997 & Wei Haifeng. 2013 & Qin Tongluo. 1994), and there are low porosity, low permeability, high water saturation, low single well natural production (Wang Yonghui. 2012 & Li Yingchuan. 2009). Therefore, stimulation technique is a key to tight sandstone oil development and utilization, the fracturing parameters optimization design is the core problem which influences fracturing effect.
