长期注水对储层渗透性影响实例分析  

The Example Analysis For Influence of Long-Term Water Flooding on Permeability of Reservoir

作　　者：谢进庄[1] 刘鹰[1] 

机构地区：[1]大庆油田有限责任公司测试技术服务分公司,黑龙江大庆163453

出　　处：《油气井测试》2015年第6期18-20,74,共3页Well Testing

摘　　要：经过长期高压注水或压裂后,储层的渗透率会发生不同程度的变化。利用压力降落法分别计算注水井各个注水时期储层的有效渗透率,考察其变化幅度和变化趋势。结果表明,注水井经过长期高压注水后,储层的渗透率会逐渐增大。注水井压裂后,80%的井储层的渗透率增大,渗透性得到改善,吸水能力增强。与注水早期相比,当关井初期压力降落速度快、幅度大,有效渗透率明显增大时,主力吸水层位内部已形成了大孔道,需要对其调剖或封堵。The permeability of the reservoir would be changed in different degrees after the long-term high pressure water injecting or fracturing.The effective permeability of the reservoir during different injection period of the water-injection well is calculated to investigate the change scale and the change trend by the method of pressure drop. The results show that the permeability of the reservoir has been gradually increased after long-term high pressure water injection. The permeability of the reservoir about 80% wells is increased after fracturing,the ability of the permeability and the capacity of water absorbing are also improved. Compared with the early period water injection,the high capacity channel in the main absorption layer has formed when the initial pressure of shut-in drops too speed and scale,and the effective permeability largely increased,therefore the injection profile modification or plugging are needed.

关 键 词：注水井 储层渗透率 储层改造 实例分析 

分 类 号：TE357.62[石油与天然气工程—油气田开发工程]