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在蒸汽辅助重力泄油(SAGD)生产中如何对蒸汽室(SC)进行有效的控制,对稠油和天然沥青的开采效率有着重大的影响。为了提高SAGD的累积原油采收率和蒸汽原油比,需要保持优化的产量和相应的井底温度和压力。SAGD的优化工作包括模拟结果和实时数据监控。现有的分析模型主要致力于描述油藏对加热原油的泄流能力,而没有描述SAGD过程的全部细节。本文描述了一个SAGD生产体系的新模型。在SC到达生产井之前对原油生产的初始阶段进行了考虑。该模型证明了稠油开采过程中的质量和热转换,建立了一个原油产量与SC演变动态间的重要关系式,并且该模型与商业油藏模拟软件所做的模拟进行了比较。
How to effectively control the steam chamber (SC) in steam assisted gravity drainage (SAGD) production has a significant impact on the recovery efficiency of heavy oil and natural bitumen. In order to increase SAGD’s cumulative crude oil recovery and steam crude oil ratio, it is necessary to maintain optimized production and corresponding bottomhole temperature and pressure. SAGD’s optimization efforts include simulation results and real-time data monitoring. The existing analysis model focuses on describing the reservoir’s ability to drain crude oil without all the details of the SAGD process. This article describes a new model for a SAGD production system. The initial stages of crude oil production were considered before SC reached the production well. The model proves the mass and heat transfer during heavy oil recovery and establishes an important relationship between crude oil production and SC evolution dynamics. The model is compared with the simulation made by commercial reservoir simulation software.