中文摘要：

蒸汽辅助重力泄油（SAGD）是开发稠油油藏的一种有效手段,蒸汽腔前缘的传热是决定SAGD开发效果的重要因素。虽然SAGD的传热模型很多,但是基本没有对热对流的存在形式与作用进行系统研究。充分考虑了热传导和不同的热对流作用,建立并求解了不同的SAGD传热模型。选取实际的油藏区块为研究对象,分析了不同传热作用对蒸汽腔前缘温度分布的影响,同时也分析了水的相对渗透率对热对流的影响。结果表明：SAGD过程中热传导与热对流同时存在,蒸汽腔附近热对流是主要的传热方式,水的相对渗透率越大,热对流作用越明显。

英文摘要：

Steam assisted gravity drainage（ SAGD） is a kind of effective means for the development of heavy oil reservoir,heat transfer on the front of the steam chamber is one of the important factors for the SAGD development.Although there have be many SAGD transfer models,but there is not system analysis and study on the form and function of convection in the SAGD process. Different SAGD heat transfer models are established and solved,fully considering the conduction and convection. An actual reservoir block is selected as the study object,analyzing the different temperature distribution before steam chamber,what＇s more,studying the influence of the relative permeability of water phase on the convection. The results show that conduction and convection exist in the process of SAGD at the same time,the convection is the main heat transfer way near the steam chamber,with the increase of the water relative permeability,the convection is more obvious.