考虑稠油非牛顿性质的蒸汽吞吐产能预测模型

发布时间：2018-07-17 00:22

【摘要】：与常规油不同,当达到某特定温度时,稠油呈现牛顿流体状态,而在该温度值以下时,稠油呈现非牛顿流体状态,即存在启动压力梯度。经典的解析模型将蒸汽吞吐分为热区与冷区2个部分,热区温度为蒸汽温度,冷区温度为原始地层温度。然而在实际过程中,热区到冷区的温度是一个非等温的渐变过程,不会存在热区与冷区的边界处的突变现象。而且在生产过程中,稠油在不同区域呈现牛顿流体与非牛顿流体2种状态,不同区域的稠油渗流方程不同。针对这种情况,基于Marx-Langenheim方程,对蒸汽吞吐的解析模型进行了改进。在注入阶段,考虑了热区非等温分布的特征;在生产阶段,考虑了稠油牛顿流体区与非牛顿流体区的渗流耦合。模型应用结果表明,该模型更加接近实际生产情况,有较好的应用价值。
[Abstract]:Different from conventional oil, heavy oil presents Newtonian fluid state when a certain temperature is reached, but below that temperature, heavy oil presents non-Newtonian fluid state, that is, starting pressure gradient exists. The classical analytical model divides steam huff and puff into two parts: hot zone and cold zone. The hot zone temperature is steam temperature and cold zone temperature is original formation temperature. However, in the actual process, the temperature from the hot zone to the cold zone is a non-isothermal gradual change process, and there is no catastrophe at the boundary between the hot zone and the cold zone. In the process of production, heavy oil presents two states of Newtonian fluid and non-Newtonian fluid in different regions, and the seepage equations of heavy oil are different in different regions. Based on Marx-Langenheim equation, the analytical model of steam huff and puff is improved. In the injection stage, the characteristics of non-isothermal distribution in the heat region are considered, and in the production stage, the seepage coupling between the Newtonian fluid region and the non-Newtonian fluid region of the heavy oil is considered. The application results show that the model is more close to the actual production situation and has better application value.
【作者单位】：海洋石油高效开发国家重点实验室;中国石油大学石油工程学院;卡尔加里大学化学与石油工程学院;
【基金】：海洋石油高效开发国家重点实验室开放基金项目(2015-YXKJ-001)资助
【分类号】：TE345

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