非牛顿流体弹性径向渗流近似解

为了提高原油产量,油潴工程日益广泛地采用"将非牛顿流体(如聚合物溶液、乳化液等)注入到油层中"的新工艺。注蒸汽驱油将产生天然乳化液渗流。因此需要研究非牛顿流体弹性渗流。虽然文献[1]和[2]给出了"非牛顿流体弹性径向渗流模型及其线性化后的解",但 ...     

地下水质球向输运问题的近似解

本文找到了溶质在孔隙介质中球向输运方程的近似解.该公式不仅结构简单、物理意义明确,而且与数值解的结果符合的较好.因此,可用于予测(计算)地下水质球向分布和传播范围.     

Unsteady rotative flow of non-Newtonian fluid in an annular pipe

ＵＮＳＴＥＡＤＹＲＯＴＡＴＩＶＥＦＬＯＷＯＦＮＯＮ－ＮＥＷＴＯＮＩＡＮＦＬＵＩＤＩＮＡＮＡＮＮＵＬＡＲＰＩＰＥＨｕａｎｇＪｕｎ－ｑｉ（黄军旗）（Ｄｅｐｔｏｆ＇Ｒｅｓｏｕｒ＆Ｅｎｖｉ．Ｓｃｉ．Ｂｅｉｊｉｎｇ．ＮｏｒｍａｌＵｎｉｖｅｒｓｉｔｙＢｅｉｊｉｎ...     

Analytical solutions for equations of unsteady flow of non-newtonian fluids in tube

This paper presents analytical solutions to the partial differential equations for unsteady flow of the second-order fluid and Maxwell fluid in tube by using the integral transform method. It can be used to analyse the behaviour of axial velocity and shear stress for unsteady flow of non-Newtonian visco-elastic fluids in tube, and to provide a theoretical base for the projection of pipe-line engineering.     

非牛顿流体管内不定常流的解析解

本文用积分变换方法分别给出了二阶流体和Maxwell流体管内不定常流运动方程的解析解.据此可以分析轴向速度和切应力分布与变化特征,为管道工程设计提供理论依据.     

The transient two-dimensional flow through double porous media

This paper presents the analytical solutions in Laplace domain for two-dimensionalnonsteady flow of slightly compressible liquid in porous media with double porosity by usingthe methods of integral transforms and variables separation.The effects of the ratio ofstorativities ω,interporosity flow parameter λ,on the pressure behaviors for a verticallyfractured well with infinite conductivity are investigated by using the method of numericalinversion.The new log-log diagnosis graph of the pressures is given and analysed.     

凝析气田压力曲线特征分析

本文采用一个带汇项的流动方程描述了凝析气井在压力大于最大凝析压力时的压力时间变化特征.根据Duhamel叠加原理建立了反映凝析作用的汇项;引入了描述这一汇项的两个新的物理参数:凝析强度R_D和凝析弛豫时间λ_D.由汇项在流动方程中的作用,给出了凝析作用影响井口压力的定量表述,阐明了凝析作用影响井口压力的机理.本文给出了这一流动方程外边界条件为无限大、内边界以定产量生产情况下的解析解.本文的结论可用于试井理论.     

三重介质轴对称二维不定常渗流的精确解

本文求得了三重介质轴对称二维不定常渗流的线源解和有限封闭地层的面源解.它们不仅概括和发展了已有的均质和双重介质的主要结果,而且给出多重介质弹性渗流的基本特征.     

Transient pressure of percolation through one dimension porous media with threshold pressure gradient

IntroductionManyexperimentsshow[1,2,3]thatthepercolationinlowPermeabilityisnotfittoDarcy'sLaw.Theparticularcharacteristheexistenceofthresholdpressuregradient[1],inotherwords:thefluidcanflow,onlywhentherealpressuregradientislargerthanthresholdpressuregradient.Thedevelopmentinthisresearchingfieldhasn'tmuchprogressbecauseofquestionsineconomicsandteelmologysincethisconceptwasformedin1951.ThisfieldisbecominganewwarmresearchingPOintasChinadevelopedthelowPermeabilityreservoirsinlastfewyears.Thego…     

Nonsteady flow of groundwater in aquifer system with viscoelastic properties

The transient flow behavior of groundwater in aquifer-aquitard system with viscoelastic properties is studied. On the basis of previous works (Hantush, Neuman, Brutsaert, Corapcioglu), the new partial differential-integral equations are derived. The well-known equations (Hantush, Brutsaert) are the special cases of the new equations. The new equations describe the flow of a slightly compressible groundwater in layers with viscoelastic properties.Analytical solutions of the partial differential-integral equations are obtained by using the method of Laplace transform. The viscoelastic properties enhance the heterogeneities of elastic aquifer system which have delay and feed qualities. The agreements between the numericl inversion results of Laplace transform and the analytical solutions are good. The formulae predict the transient flow behavior of groundwater in this heterogeneous layers.