特低渗透油田井网形式研究及实践

根据长庆油区特低渗透油田开发实践，运用数值模拟、驱动压力梯度研究等油藏工程方法，按照最佳配置裂缝系统、井网系统、注采压力系统的原则，提出3种井网形式、即正方形反九点、菱莆反九点和矩形井网。在油田开发实践中，根据裂缝不发育，较发育和发育3种不同情况，分别采用正方形反九点，菱形反九点，矩形井网形式开发，取得了明显效果。

Research and practice on well-pattern type of ultra-low permeability oil field

The reasonable well pattern disposition is a key factor that ultra low permeability oil field is developed successfully because it is usually relative to fracture. This paper presents that the reverse rhombus 9 spot and rectangle well pattern match best the fracture and injection production pressure systems. This is the result of reservoir engineering study including numerical simulation, driving pressure gradient analysis etc, and reviewing the evolution of well pattern for Changqing ultra low permeability oil field. In development practice, reverse square 9 spot, reverse rhombus 9 spot and rectangle well pattern were adopted according to little, fair and well developed fracture systems, which produced evident effect.