分支井连续生产监测技术应用经验

Nadir Husein, Vishwajit Upadhye, Igor Novikov, A. Drobot, V. Bolshakov, A. Buyanov, Vladimir Alekseevich Doronin
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摘要

本文介绍了在西西伯利亚某多分支井中应用生产监测流入示踪方法的实例。在施工过程中,通过水平侧跟踪将示踪剂系统放置在井中,并进行多级水力压裂(MSHF),母井仍在运行中。该技术可以利用横向井眼开发储层排水区,并将母井中剩余的石油储量投入生产,从而提高油井产能和采收率。示踪剂系统安装在完井的井下短节内的母井眼中。在多级水力压裂过程中,注入聚合物涂层支撑剂充填层,将示踪剂输送到侧轨道分支。动态生产剖面有助于更有效地开发复杂和非均质油藏,并在多分支井施工期间提高生产油藏波及比,这使我们能够解决几个关键问题:为分支井提供水驱诊断工具,寻找一种简便的断水方法,评估多段水力压裂效率,制定最优处理方案,选择分支井作业的最佳模式,防止一个或多个分支井过早发生水淹,评估建井是否有效,通过侧边跟踪提高了产量。目前,该解决方案首创,使作业者能够获得一组数据,这些数据不仅可以显著提高油井产能,提高石油采收率,还可以节省大量资本支出。
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Experience of Using Continuous Production Surveillance Techniques in Multilateral Wells
This paper deals with the case of using the production surveillance inflow tracer-based method in one of multi-lateral wells located in West Siberia. Tracer systems were placed in the well during the well construction by horizontal side tracking, and multi-stage hydraulic fracturing (MSHF) was performed, with the parent borehole remaining in operation. This technology allows developing the reservoir drainage area with a lateral hole and bringing the oil reserves remaining in the parent borehole into production, which results in an increased well productivity and improved oil recovery rate. Tracer systems are placed into the parent borehole within a downhole sub installed into the well completion. Polymer-coated proppant pack was injected during multi-stage hydraulic fracturing to deliver the tracers to the side track lateral. Dynamic production profiling was done to aid into more efficient development of complex and heterogeneous reservoirs and improve of the productive reservoir sweep ratio during the construction of multilateral wells, which enabled us to address several key problems: Providing tools for waterflood diagnostics in multilateral wells and finding an easy water shut- off method for a certain interval Assessing the efficiency of multi-stage hydraulic fracturing and elaborating the optimal treatment design Selecting the optimal mode of the multilateral well operation to prevent premature flooding in one or more laterals Evaluating whether well construction was performed efficiently, and a higher production was achieved by side tracking. Currently, the proposed first-of-its-kind solution enables the operator to obtain a set of data that can help not only significantly improve the wells productivity and increase the oil recovery rate, but also lead to a considerable economic savings in capital expenditure.
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