刘永良,贾永禄,康毅力,余佳
LIU Yong-liang1,JIA Yong-lu1,KANG Yi-li1,YU Jia2(1.State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering

• 1:西南石油大学油气藏地质及开发工程国家重点实验室
• 2:西南石油大学油气藏地质及开发工程国家重点实验室
• 3:西南石油大学油气藏地质及开发工程国家重点实验室
• 4:四川石油管理局地质勘探开发研究院 四川成都610500

摘要(Abstract)：

常规的稠油热采复合油藏试井模型分析结果与实测曲线拟合效果不佳。因此,根据注蒸汽开采地层温度的分布特点,建立了考虑热损失的三区复合油藏试井模型,推导出了其在Laplace空间的解析解,通过Stehfest数值反演获得了试井样板曲线,并讨论了主要油藏地质和工程参数对样板曲线的影响。分析表明,考虑热损失时,蒸汽区半径对典型曲线的影响很小,过渡区半径主要影响第三平台出现的时间,以及蒸汽区和过渡区半径的差值影响第二平台是否出现;蒸汽区与过渡区的导压系数比主要影响压力导数曲线第二平台之前是否出现波峰;蒸汽区与冷油区的导压系数比主要影响压力导数曲线第三平台之前是否出现波峰。基于热损失的稠油热采三区复合油藏试井分析明显改善了拟合程度,有助于稠油油藏的精细描述。
The matching effects of actual curve with analysis results of composite reservoir well test model of conventional heavy oil thermal recovery is poor.Therefore,based on division features of formation temperature by steam injection,three-zone composite reservoir well test model considered heat loss is established.The model is deduced by using of Laplace transformation,then using Stehfest Transforms method to obtain the type-curves.The effects of major reservoir geologic and engineering parameters on type-curves are discussed.Analysis shows that,when considering heat loss,the effect of steam zone radius on type-curves is small,effect of transition zone radius on the appear time of the third platform is main,and the difference between steam zone and transition zone radius impact of the second platform emerged.Diffusivity ratio of steam zone and the transition zone has mainly impact of the proliferation of pressure derivative curve before the second platform whether wave peak appears,the diffusivity ratio of steam zone and cold oil zone has mainly impact of the proliferation of pressure derivative curve before the second platform whether wave peak appears.Well test analysis based on three-zone composite reservoir for heavy oil thermal recovery with consideration of heat loss obviously improves matching result and contributes to fine description for heavy oil reservoir.

关键词(KeyWords)： 稠油;油藏;热采;试井;复合;模型;热损失
heavy oil;reservoir;thermal recovery;well test;composite;model;heat loss

Abstract:

Keywords:

基金项目(Foundation): 四川省杰出青年学科带头人培养基金项目(2007Q14-04102ZQ026-042);; 中国石油天然气股份有限公司科技风险创新研究项目

作者(Author): 刘永良,贾永禄,康毅力,余佳
LIU Yong-liang1,JIA Yong-lu1,KANG Yi-li1,YU Jia2(1.State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering

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