流体流动对低渗岩心电阻率的影响实验研究  

Experimental study of the impact of fluid flow on low permeability core resistivity

作　　者：缪飞飞[1] 任晓娟[1] 刘继梓[2] 刘军令[3] 初振淼[4] 

机构地区：[1]西安石油大学,陕西西安710065 [2]中油长庆油田分公司,陕西榆林718600 [3]中石化中原油田分公司,河南濮阳457001 [4]中油辽河油田分公司,辽宁盘锦124010

出　　处：《特种油气藏》2009年第2期76-77,86,共3页Special Oil & Gas Reservoirs

摘　　要：通过室内实验,研究了不同岩性、润湿性、渗透率等条件下岩心油驱水和水驱油过程中岩石电阻率的变化,分析了流体流动对低渗岩石电阻率和阿尔奇饱和度指数以及地层因素的影响。实验结果表明:①低渗透油层亲水岩心和亲油岩心的电阻率随含水饱和度的增加而降低。②岩心渗透率越高饱和度指数越高,渗透率越低饱和度指数越低;亲油岩心电阻率较大,亲水岩心电阻率较小。③岩心渗透率越高,岩心的电阻率越低;岩心渗透率越低,岩心电阻率越高。④在相同的驱替速度下,电阻率随围压的增加而增加。⑤低渗透储层亲水岩石的饱和度指数值大于亲油岩石的饱和度指数值。This paper studies the changes of core resistivity during the processes of water displacement by oil and oil displacement by water with different rock, wettability and permeability through laboratory experiments, and analyzes the impact of fluid flow on low permeability rock resistivity and Archie saturation exponent as well as formation factors. The experiment result shows that: ① the resistivities of water wet core and oil wet core of low permeability reservoirs decrease with the increasing of water saturation. ② The higher the core permeability is, the higher the saturation exponent is, and the lower the permeability is, the lower the saturation exponent is; oil wet core has higher resistivity, and water wet core has lower resistivity. ③ The higher the core permeability is, the lower the core resistivity is, and vice versa. ④ Under the same rate of displacement, the resistivity increases with confinement pressure. ⑤ In low permeability reservoirs, the saturation exponent value of water wet rock is higher than that of oil wet rock.

关 键 词：流体流动 低渗岩心 岩心电阻率 电阻率指数 实验研究 

分 类 号：TE357[石油与天然气工程—油气田开发工程]