五点井网注水井压裂裂缝参数对油井产量的影响

Effect of fracture parameter on oil well production during fracturing water injection well in five-spot well pattern

根据五点井网整体压裂特点,建立了考虑注水井导流能力沿裂缝变化和导流能力随时间失效的产量预测模型,模型更符合实际情况。使用该模型计算注水井压裂对相邻油井的产量影响情况,从而优选出注水井裂缝参数。同时,计算模型考虑了注水井裂缝和附近地层的渗透率伤害对油井产量的影响,也考虑了注水井裂缝和地层相对渗透率不同对油井产量的影响,结果表明:裂缝和地层伤害,以及裂缝和地层相对渗透率不同会严重影响油藏的采收率。

According to the integral fracturing characteristics of the five-spot well pattern, a numerical model considering the change of fracture conductivity for water injection well along the fracture and the decrease of it is established. The model is more practical. The effect of the water injection well fracturing on the adjacent oil well production is calculated by the model and then the fracture parameters of water injection well are optimized. Meantime, the calculation model considers the effect of the permeability damage of the water injection well fractures and the adjacent formation on the oil well production, and analyzes the effect when the relative permeability is different between them. The result shows that those factors will greatly affect the reservoir recovery factor.