同井网上返开发停注层封堵效果评价方法优化

Optimization of Evaluation Method for Plugging Effect of Injection Stopping Stratum in the Same Well Network Developing

某试验区首次利用原井网上返开发新层系,既要在注水井中监测开发层系的注入剖面,又要检查同井停注层段的封堵效果。针对这一需求,通过对比分析常用注入剖面测井技术适用性,优化制订了监测方案,对该试验区所有注入井均开展了吸水状况和停注效果的综合评价。对查出停注层段不密封的井,及时采取了治理措施,有效提高了开发效果。

The original well pattern is reused to develop upward layers for the first time in a test area.It is necessary to monitor the injection profile of the flooding layers in a injector as well as check the sealing-off effect of injection-stopped interval for the same well.To meet these needs,the monitoring scheme was optimized by comparing and analyzing the applicability of commonly used injection profile logging techniques.Comprehensive evaluations of the effect of water injection and stopping injection were implemented for all injectors in the test area.Treatment measures were taken for wells that were detected to be unsealed in the injection-stopped interval,which effectively improved the development effect.