低渗透油田堵水转向压裂新技术研究与应用

针对低渗透油藏随着注水开发,使得人工裂缝和天然裂缝沟通能力进一步增强,导致油井含水率逐渐上升,产能逐渐下降,甚至水淹的油井,经过常规重复压裂和酸化改造后效果不佳的情况。重点研究堵水与转向压裂相复合,形成了堵老缝压新缝的堵水转向压裂新技术。通过研究重复压裂的造缝机理,量化造新缝的可能性及条件,实施了现场应用试验,取得了较好效果,从而验证了新技术的可行性。该项技术在低渗透油田注水开发中,挖潜油层能力,延长低含水采油期,具有极为重要的现实意义。

Study and application of new technology of deflection fracturing by water shut-off in low-permeability oilfield

As the oilfields are injected,the connection between artificial fracture and natural fracture is enhanced further,which leads to that water cut of oil wells increases and deliverability decreases so even some oil wells are flooded.The production effect of these wells is not well by normal refracturing and acidation.The integration water shutoff and deflection fracturing was studied in the paper and deflection fracturing by water shut-off was created which can blocks old fractures and creates new fractures.T...