分层注水管柱密封性失效预测方法研究  

Research on the Prediction Method of the Sealing Failure of the Layered Water Injection String

作　　者：高永华 刘华伟 刘全刚 刘磊 李孟超 GAO Yonghua;LIU Huawei;LIU Quangang;LIU Lei;LI Mengchao(CNOOC Tianjin Branch Company,Tianjin 300452,China;CNOOC Ener-Tech Drilling&Production Co.,Tianjin 300452,China)

机构地区：[1]中海石油(中国)有限公司天津分公司 [2]中海油能源发展股份有限公司工程技术分公司

出　　处：《钻采工艺》2020年第5期53-56,I0004,共5页Drilling & Production Technology

基　　金：中海油能源发展科研基金项目“隔离密封性能检测管柱工艺研究”(编号:GCJSLZBG-J1708)。

摘　　要：为确保有效的分层注水,建立密封筒受损当量直径、漏失量和压力之间的函数关系对于密封筒分层验封,二者具有很好的相似性。文章采用物理模拟和数值模拟相结合的方法,研究了缝隙流动流量、压降和当量直径之间的关系建立了受损状态与漏失量之间函数模型。研究结果表明,函数模型分析结果与试验数据比对,误差小于10%,验证了该模型的可靠性;密封筒缝隙入口到上出口压降随分流比的增大而增大,随入口流量的增大而增大;当入口流量一定时,缝隙当量直径越大,流体在流动过程中的压降损失越小。该研究成果可为密封筒受损预测提供一种方法,为优选密封工具、实现分层开采提供理论指导。In order to ensure effective layered water injection,the functional relationship among the damaged equivalent diameter,leakage and pressure of the sealing cylinder is established,which has a good similarity for the layered sealing inspection of the sealing cylinder. By means of physical simulation and numerical simulation, the relationship function between damage state and leakage was proposed,and the relationship among the flow rate,pressure drop and equivalent diameter was researched in this study. Results demonstrate that the error is less than 10% compared with the experimental data,which verifies the reliability of the model. The pressure drop from the gap inlet to the upper outlet increases with the increase of the split ratio and the inlet flow rate. The larger gap equivalent diameter,the smaller pressure drop loss in the flow process when the inlet flow rate is constant. The proposed method provides a method for predicting the damage of sealing cylinder,and provides theoretical guidance for optimizing sealing tools and realizing slicing mining.

关 键 词：分层开采 密封检测工具 物理模拟 预测模型 

分 类 号：TE952[石油与天然气工程—石油机械设备]