稠油碱驱机理的物理模拟和数值模拟

doi:10.7623/syxb201102014

石油学报 ›› 2011, Vol. 32 ›› Issue (2): 285-289.DOI: 10.7623/syxb201102014

稠油碱驱机理的物理模拟和数值模拟

裴海华张贵才葛际江刘清华丁保东

中国石油大学石油工程学院山东青岛 266555

收稿日期:2010-07-11 修回日期:2010-10-19 出版日期:2011-03-25 发布日期:2011-05-25
通讯作者: 裴海华
作者简介:裴海华，男，1984年8月生，2007年毕业于中国石油大学（华东），现为中国石油大学（华东）在读博士研究生，主要从事油气田开发与提高原油采收率方面的研究。
基金资助:
国家高科技研究发展计划（863）项目（2007AA06Z201）、教育部新世纪优秀人才支持计划（NECT070846）和霍英东教育基金优选资助课题（114016）联合资助。

Physical experiments and numerical simulations on displacement mechanism of alkaline flooding for heavy oils

PEI Haihua ZHANG Guicai GE Jijiang LIU Qinghua DING Baodong

Received:2010-07-11 Revised:2010-10-19 Online:2011-03-25 Published:2011-05-25

摘要/Abstract

摘要：

通过物理模拟实验和数值模拟方法研究了碱驱提高稠油采收率的驱替机理。首先通过实验测定了碱和稠油的界面张力，然后通过填砂管驱油实验评价了驱油效果，最后对室内物理模拟实验结果进行了数值模拟和历史拟合。研究结果表明，稠油碱驱过程中随着碱浓度的升高，原油采收率和压力降都随之升高。压力降的升高主要由于生成了油包水乳状液，增加了水流通道中水相的流动阻力，导致注入水流向未波及的区域，从而提高了稠油采收率。对稠油碱驱数值模拟时考虑了界面张力的降低、化学剂的吸附和油包水乳状液的形成。结果表明，模拟值和实验值拟合得较好。

关键词: 稠油, 碱驱, 油包水乳状液, 物理模拟, 数值模拟

Abstract:

Displacement mechanisms of alkaline flooding for enhancing heavy oil recovery were studied by means of physical experiments and numerical simulations. Firstly, the interfacial tension between heavy oils and alkaline solution was measured, and then the displacement effect was appraised through sandpack flooding tests. Finally, physical simulation results were numerically simulated and historically matched. The study results indicated that the oil recovery and pressure drop of alkaline flooding increased with increasing the alkaline concentration. The increase in pressure drop was mainly due to the formation of water-in-oil(W/O) emulsions, enhancing the flow resistance of water phase and resulting in the injected water flowing to unswept regions, thus, the heavy oil recovery was enhanced. A better agreement between the measured and simulated results could be obtained when the interfacial tension reduction, the adsorption of chemicals and the formation of W/O emulsions were taken into account.

Key words: heavy oil, alkaline flooding, water-in-oil emulsion, physical simulation, numerical simulation

裴海华张贵才葛际江刘清华丁保东. 稠油碱驱机理的物理模拟和数值模拟[J]. 石油学报, 2011, 32(2): 285-289.

PEI Haihua ZHANG Guicai GE Jijiang LIU Qinghua DING Baodong. Physical experiments and numerical simulations on displacement mechanism of alkaline flooding for heavy oils[J]. Editorial office of ACTA PETROLEI SINICA, 2011, 32(2): 285-289.

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稠油碱驱机理的物理模拟和数值模拟

Physical experiments and numerical simulations on displacement mechanism of alkaline flooding for heavy oils

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