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| 稠油油藏溶剂辅助蒸汽驱前缘预测模型 |
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刘昊1,程林松1,2,黄世军1,2,李春兰1,2,张忠义3,贾品1
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(1.中国石油大学石油工程学院,北京 102249;2.中国石油大学石油天然气教育部重点实验室,北京 102249;3.中国石油勘探开发研究院,北京 100083)
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| 摘要: |
| 为了描述注溶剂条件下蒸汽前缘的形状,首先提出蒸汽前缘气相内组分平衡状态计算方法,获得边界温度特征;其次列出前缘液相组分组成的计算过程,建立考虑三相平衡状态的蒸汽前缘形状预测模型;最后采用迭代法获得界面关键参数,并求解整个模型。结果表明:溶剂辅助蒸汽前缘形状以楔形为主,并且在较低注汽速度情况下,重质溶剂改善垂向波及系数效果明显优于轻质溶剂,对于较高注汽速度,轻质溶剂改善重力超覆现象的潜力明显大于重质溶剂。 |
| 关键词: 溶剂辅助蒸汽驱 注蒸汽 蒸汽前缘 相态平衡 解析模型 |
| DOI：10.3969/j.issn.1673-5005.2017.01.014 |
| 分类号::TE 348 |
| 文献标识码:A |
| 基金项目:国家重大专项(2016ZX05012-005-004,6ZX05025-004-002) |
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| A mathematical model for steam frontier prediction in solvent enhanced steam flooding process |
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LIU Hao1, CHENG Linsong1,2, HUANG Shijun1,2, LI Chunlan1,2, ZHANG Zhongyi3, JIA Pin1
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(1.College of Petroleum Engineering in China University of Petroleum, Beijing 102249, China;2.Key Laboratory for Petroleum Engineering of Ministry of Education in China University of Petroleum, Beijing 102249, China;3.Research Institute of Petroleum Exploration ＆ Development, PetroChina, Beijing 100083, China)
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| Abstract: |
| In order to delineate the shape of the steam frontier during solvent enhanced steam flooding process, a computing method for two-component equilibrium was firstly proposed to acquire the temperature distribution of the water-steam interface, and then a whole composition model of the liquid phase was established to determine solvent enhanced steam flooding frontier. An iteration method was used to solve the model and the critical parameters of the interface can be calculated. The results of a case study for a specific heavy oil reservoir show that the steam frontier of the solvent enhanced steam flooding process is mainly of a wedge-shape, and heavier solvents perform better than lighter ones in terms of improving vertical sweep efficiency when the steam injecting rate is low, while the lighter solvents have a better capability to overcome the gravity induced steam override problem than the heavier ones when the injecting rate is very high. |
| Key words: solvent enhanced steam flooding steam injection steam frontier phase equilibrium analytic model |
