The nonuniformity of the steam chamber has a significant influence on oil recovery in the process of Steam-Assisted Gravity Drainage (SAGD). To improve steam conformance, Flow Control Devices (FCDs) are generally installed in both the SAGD injector and producer. In this paper, we investigated the steam conformance of tubing-deployed FCDs in a SAGD well pair. First, a three-phase, three-dimensional reservoir model was developed. Then, a wellbore model for saturated steam flow in the FCD equipped injector and oil/water flow in the FCD equipped producer was proposed. Next, the reservoir and wellbore models were coupled and solved fully implicitly. Finally, after model validations, the effects of the steam injection mode, FCD parameters, steam injection parameters and reservoir geological properties on the conformance of the steam chamber were studied. The results showed that tubing-deployed FCDs were obviously better at improving the steam conformance than the simultaneous dual-tubing string injection technique and injecting steam at only a single point. The steam chamber conformance increased with a decrease in steam injection pressure and reservoir permeability and an increase in steam quality and oil saturation. The steam chamber uniformity gradually declined with time. To maintain the steam conformance over the life of the SAGD and ultimately oil recovery, the FCD open flow area design in SAGD wells should be adjusted at different injection times. When the FCD open flow area was small in the part with high permeability and large in the part with low permeability, a high degree of steam conformance and greater amount of cumulative oil production could be obtained.

蒸汽室的不均匀性对蒸汽辅助重力排水（SAGD）过程中的油回收具有重大影响。为了提高蒸汽的顺应性，通常在SAGD注入器和生产器中都安装了流量控制设备（FCD）。在本文中，我们研究了SAGD井对中已部署油管的FCD的蒸汽顺应性。首先，建立了一个三相三维储层模型。然后，提出了配备FCD的喷油器中的饱和蒸汽流量和配备FCD的采油器中的油/水流量的井眼模型。接下来，将储层和井眼模型耦合并完全隐式求解。最后，在模型验证之后，研究了注汽模式，FCD参数，注汽参数和储层地质特性对蒸汽室一致性的影响。结果表明，与同时使用双管柱注入技术和仅在单点注入蒸汽相比，采用管子部署的FCD明显改善了蒸汽的顺应性。蒸汽室顺应性随着蒸汽注入压力和储层渗透率的降低以及蒸汽质量和油饱和度的提高而增加。蒸汽室的均匀性随时间逐渐下降。为了在SAGD的整个生命周期中保持蒸汽顺应性并最终回收石油，应在不同的注入时间调整SAGD井中的FCD开放流面积设计。当在高渗透率部分中FCD开流面积小而在低渗透率部分中FCD开流面积大时，可以获得较高的蒸汽顺应性和大量的累计产油量。