致密油藏与常规油藏物性界限研究方法探讨及其应用

发布时间：2018-02-26 18:20

  本文关键词： 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　出处：《西安石油大学学报(自然科学版)》2017年04期 　论文类型：期刊论文

【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%。
[Abstract]:In the past, the boundary of physical properties between compact reservoir and conventional reservoir was mainly based on a large number of measured physical property statistics of typical tight oil basins, which is lack of theoretical basis. Taking Yanchang 7 dense oil in Ordos Basin as an example, this paper takes the dense reservoir as an example. Based on the reservoir forming mechanism and characteristics of conventional reservoirs, the physical simulation experiments of fluid percolation characteristics and the oil-water distribution characteristics of present dense and conventional reservoirs are carried out through the analysis of the stress state of petroleum particles. Based on the mechanical balance method when the buoyancy and capillary resistance are equal, the physical simulation experiment of the true sandstone oil filling is carried out. The distribution characteristics of physical properties of compact oil and conventional reservoirs, and the relationship between the pressure of high-pressure mercury displacement and the physical properties of reservoirs are confirmed by four methods, and the upper limit parameters of reservoir density are basically the same. The tight upper permeability of the reservoir is about 1 脳 10 ~ (-3) 渭 m ~ (-2), corresponding to the upper porosity of about 12.
【作者单位】： 西安石油大学地球科学与工程学院;西安石油大学陕西省油气成藏地质学重点实验室;中国石油长庆油田分公司第三采气厂;
【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)
【分类号】：P618.13
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本文编号：1539114