石油钻采工艺2017，Vol.39Issue(2)：125-129,5.DOI:10.13639/j.odpt.2017.02.001
致密油储层岩石孔喉比与渗透率、孔隙度的关系
Relationship of pore-throat ratio vs. permeability and porosity of tight oil reservoir rock
摘要
Abstract
Pore-throat ratio is one of the most important microscopic physical properties of tight oil reservoir rocks and it has great effect on the remaining oil distribution and displacement pressure of reservoirs. After pore structure parameters of reservoir rocks were analyzed, such as pore-throat ratio, coordinate number, pore radius and throat radius, the theoretical relation between microscopic physi-cal properties and macroscopic physical properties (porosity and permeability) of tight oil reservoir rocks was established by using the composite capillary model. Then, constant-rate mercury injection experiment data of 44 suites of cores taken from Chang 6 oil formation in Banqiao area were used for fitting. It is indicated that the porosity (φ) and permeability (k) of tight oil reservoir rocks are controlled by pore radius and throat radius, respectively. There is a good mathematical relationship between pore-throat ratio and φ0.5/k0.25. Oil dis-placement experiment was performed on two suites of cores whose permeabilities are close and porosities are more different. It is verified that the water displacing oil resistance in tight sandstones with higher φ0.5/k0.25 is higher.关键词
致密油/孔喉比/孔隙度/渗透率/驱油阻力/恒速压汞实验Key words
tight oil/pore-throat ratio/porosity/permeability/oil displacement resistance/constant-rate mercury injection experi-ment分类
能源科技引用本文复制引用
李伟峰,刘云,于小龙,魏浩光..致密油储层岩石孔喉比与渗透率、孔隙度的关系[J].石油钻采工艺,2017,39(2):125-129,5.基金项目
国家科技重大专项"高压低渗油气藏固井完井技术"(编号:2016ZX05021-005). （编号:2016ZX05021-005）
