注水井连续液动解堵效果及对多轮次酸化影响  

The effect of continuous hydraulic block removal of water injection wells and its influence on multiple rounds of acidizing

作　　者：孙鹏飞 杜勋[1] 荣新明[1] 刘洋[1] 吴广 王冠华[1] SUN Pengfei;DU Xun;RONG Xinming;LIU Yang;WU Guang;WANG Guanhua(COSL Production Optimization,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司油田生产事业部,天津300459

出　　处：《石油化工应用》2022年第3期29-33,共5页Petrochemical Industry Application

摘　　要：统计分析了渤海某油田9井次注水井连续液动解堵的实施效果,措施后平均视吸水指数初增倍数0.53,平均有效期46.25 d,平均累积增注量3782.66 m^(3)。通过分析实施连续液动解堵前后两次常规酸化解堵效果,发现7口井后次酸化后视吸水指数较前次增加,增幅1.1~82.18 m^(3)/(MPa·d),5口井后次酸化后有效期较前次有所提升,增幅8~30 d。注水井多轮次酸化作业中连续液动解堵与后次酸化时间间隔越短,则后次酸化后视吸水指数和有效期较前次增幅越大。A statistical analysis of the effect of continuous hydraulic plugging removal of 9wells in a Bohai oilfield.After the measures,the average initial increase of apparent water absorption index is 0.53,the average effective period is 46.25 d,and the average cumulative injection volume is 3782.66 m^(3).By analyzing the effect of two conventional acidizing and plugging removal before and after the implementation of continuous fluid plugging,it is found that the apparent water absorption index after acidizing of 7 wells increased from the previous time,with an increase of 1.1~82.18 m^(3)/(MPa·d),and the validity period of 5 wells after acidizing has been improved compared with the previous one,an increase of 8~30 d.The shorter the interval between continuous hydraulic plugging removal and the subsequent acidizing in the multi-round acidizing operation of the water injection well,the greater the increase in the apparent water absorption index and the effective period after the subsequent acidizing.

关 键 词：连续液动 多轮次 酸化 视吸水指数 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]