水力压裂中近井筒效应分析及支撑剂段塞技术在中原油田的应用

NEAR-WELLBORE EFFECTS ANALYSIS IN HYDRAULIC FRACTURING AND APPLICATIONS OF PROPPANT SLUGS TECHNIQUE IN ZHONGYUAN OILFIELD

中原油田定向斜井和长井段射孔井日益增多,使近井筒效应成为影响水力压裂施工成败的重要因素,通过采用支撑剂段塞技术,有效地降低了压裂砂堵的风险,提高了压裂施工的成功率。文中对近井筒效应进行了分析,并介绍了降排量测试方法及支撑剂段塞技术在中原油田的应用情况。

Increasing of deviated well and long-perforated well in Zhongyuan oilfield make near-wellbore effects becoming one of important factors affecting success of fracturing operatons.Adopting proppant slugs technique can decrease effectively the risk of sand plug in fracturing operation and improve the success ratio of fracturing operation.The paper analyzes near-wellbore effects of hydraulic fracturing,and introduces applications of rate step-down test and proppant slugs technique in zhongyuan oilfield.