摘要
根据渗流力学和传热学原理,建立水驱油多孔介质流固耦合换热控制方程.考虑热水驱过程中原油密度、黏度随温度的变化关系,对微尺度模型水驱油过程进行数值计算,分析不同模型内岩石部分润湿对水驱油微观相态分布的影响.结果表明:在水驱过程中注入水一侧岩石润湿性对含油饱和度起着决定性影响;驱替过程结束后,随着停驱时间的延长,剩余油、水两相微观相态分布变化明显,不同模型内差异较大;在注入水一侧和水驱前缘分别出现不同形态的孤立油滴和油包水型乳状液;通过改变亲水岩石和亲油岩石的接触角发现,随着亲水岩石接触角的减小,模型均表现为停驱前含油饱和度相对较大,而随着亲油岩石接触角的增大,不同模型内含油饱和度差异较大,变化规律不明显.计算结果可为油藏多孔介质流动与传热机理的基础研究提供理论指导.
Water-driven oil in porous media fluid and solid coupled heat transfer control equations are established by the theory of percolation mechanics and heat transfer.Crude oil density and viscosity varying with temperature is considered in the process of hot water driven and calculated the process of micro scale model of water driving oil.Partial wet of rock affecting the water-driven oil of microcosmic morphology distribution is analyzed at 6 different models.Research shows that rock wettability on oil saturation plays a decisive role on the water side in the process of injection.With the cessation of driving time,the remaining of two-phase oil and water micro-phase distribution changed significantly and quite different within the different models after the driven replacement process.Different forms of isolated oil droplets and water-in-oil emulsion appeared at the injection side and water-driven front.The 6 models show that before the driving ceased,the oil saturation augmented with the hydrophilic contact angle of rock minished by changing the contact angle of hydrophilic and lipophilic rock.Large difference in oil saturation because of pro-oil contact rock angle augmented at different models and the variation unconspicuous.The results provide theoretical guidance for reservoir porous media flow and heat transfer mechanism.
出处
《大庆石油学院学报》
CAS
北大核心
2011年第2期46-50,118,共5页
Journal of Daqing Petroleum Institute
基金
辽宁省自然科学基金项目(20082186)
关键词
水驱油
岩石润湿性
部分润湿
微尺度
相态分布
数值计算
water-driven oil
rock wettability
partial wetting
phase distribution
numerical calculation
