致密油藏与常规油藏物性界限研究方法探讨及其应用  

Discussion and Application of Research Method of Physical Property Limits of Tight Oil Reservoir and Conventional Reservoir

作　　者：白玉彬[1,2] 赵靖舟[1,2] 叶小闯[3] 

机构地区：[1]西安石油大学地球科学与工程学院,陕西西安710065 [2]西安石油大学陕西省油气成藏地质学重点实验室,陕西西安710065 [3]中国石油长庆油田分公司第三采气厂,内蒙古乌审旗017300

出　　处：《西安石油大学学报（自然科学版）》2017年第4期32-38,共7页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：陕西省教育厅专项科研计划项目(编号:15JK1559);陕西省自然科学基础研究计划项目(编号:2017JM4014;编号:2013JM5007)

摘　　要：对于致密油藏与常规油藏物性界限的判定以往主要基于对典型致密油盆地的大量实测物性统计资料,缺少理论的依据。以鄂尔多斯盆地延长组长7致密油为例,从致密油藏、常规油藏成藏机理与成藏特征出发,通过石油质点受力状态分析、流体渗流特征的物理模拟实验及现今致密和常规油藏油水分布特征,探讨储层致密上限参数。基于浮力和毛管阻力相等时的力学平衡法、真实砂岩石油充注物理模拟实验、现今致密油与常规油藏物性分布特征及高压压汞排驱压力与储层物性关系等4种方法相互印证,确定的储层致密上限参数基本一致,综合得出储层致密上限渗透率约1×10^(-3)μm^2,对应孔隙度上限约12%。The determination of the tight oil reservoir physical property limits is generally based on the statistics of a lot of physical property measurement data of typical tight oil basins, but this lacks of theoretical basis. Taking Chang 7 tight oil reservoir in Ordos Basin as an example, based on the formation mechanism and characteristics of tight oil and normal oil reservoirs, the physical property limits of tight oil reservoirs are discussed through the analysis of oil particle stress state, the simulation experiment of fluid seepage characteristics and the current oil-water distribution characteristic analysis of tight and conventional oil reservoirs. The physical property limits of tight oil reservoir determined based on the mechanical equilibrium method, the physical simulation experiment for petroleum injecting sand- stone,the current physical property distribution of tight and conventional oil reservoirs and the relationship between high pressure mer- cury discharge pressure and reservoir physical property are basically consistent ： the upper limit of tight oil reservoir permeability is about 1×10-3μm2,and the upper limit of the porosity is about 12%.

关 键 词：物性界限 成藏特征 油藏类型 非达西渗流 致密砂岩 鄂尔多斯盆地 

分 类 号：TE122.1[石油与天然气工程—油气勘探]