变形介质低渗透油藏数值模拟研究油气田开发工程专业论文.docxVIP

中文摘要论文题目： 中文摘要 论文题目： 变形介质低渗透油藏数值模拟研究 专 业： ：油气田开发工程 硕士生： 郝上京(签名) 指导老师： 陈明强(签名) 摘要 在低渗透油藏中，由于多孑L介质孔隙和喉道较小，固液作用显著，因此达西定律己 不适用，即低渗透油藏渗流时存在启动压力梯度。另外，有些低渗透油藏还具有压力敏 感特征，即渗透率一般随压力变化而变化，尤其是异常高压的低渗透油藏。本文的目标 是考虑启动压力梯度和介质变形的影响，研究低渗透油藏中渗流数学模型与求解方法， 并通过实例展示数值模拟结果特征。 1)研究了变形介质低渗透油藏的渗流机理及特征； 2)考虑介质变形和启动压力梯度的低渗透油藏特征，以质量守恒方程、偏微分方 程理论等为基础，建立了变形介质低渗透油藏渗流数学模型； 3)用有限差分法求解变形介质低渗透油藏渗流数学模型； 4)用实例检验了建立的数学模型和数值解法，实际应用具有很好的可靠性。 关键词：低渗透油藏；变形介质；启动压力梯度；数值模拟 论文类型：应用研究 II Subject：numeric Subject：numeric simulation of deformation medium of low·permeability reservoirs Specialty： Oilgas Exploration Engineering Name：Hao ShangJing(Signa Instructor：Chen Mingqiang IIl the low-permeability reservoir，since pore and throat is smaller and the solid—liquid role is significant in the porous medium，Darcy’S law is rio longer applicable，that is，start。up pressure gradient exists when low permeability reservoir seepage flows．In addition，some low．permeability reservoirs also have the pressure·sensitive character，that is，in general permeation rate varies with pressure，especially abnormal high pressure low permeability reservoir．In this paper,the goal is to consider start—up pressure gradient and the impact of media deformation on low permeability reservoir seapage when modleing and solving，and the characteristics of simulation results iS displayed by case history． 1 1 The flow mechanism and characteristics of the deformation of the medium lOW permeability reservoir is studyed； 2)Considering low permeability reservoir characteristics of deformation medium and the start-up pressure gradient，on the basis of conservation equation,the theory of partial differential equations and SO on,the deformation medium low permeability reservoir seepage mathematical model is builded； 3)The deformation medium low permeability reservoir seepage mathematical model is solved by the finite difference method； 4)The mathematical models and numerical solution iS vertificated by the case history, the practical application has a good rel