正方形反九点井网压力梯度及水驱储量动用程度研究

Study on pressure gradient and producing degree of water flooding reserves in square inverted nine-spot well pattern

根据达西渗流理论及势的叠加原理,推导出正方形反九点井网正常生产时的压力梯度平面分布规律,并将其应用于正方形反九点井网有效注采系统的形成条件及水驱储量动用程度的研究中。以实际油田为例,研究了正方形反九点井网可动油范围及水驱储量动用程度随注采压差变化的规律,为正方形反九点井网调整井的部署提供了理论依据。

According to Non-Darcy flow theory and potential superposition principle, this paper deduced pressure gradient distribution law at the normal production in square inverted nine-spot well pattern, and applied the result to the studies of effective injection-production system formation conditions and producing degree of water flooding reserves in square inverted nine-spot well pattern. Taking actual oilfield as an example, this paper studied the rule that producing degree of water flooding reserves changes with injection-production differential pressure variation, which can provide theory basis for adjustment well deployment in square inverted nine-spot well pattern.