摘要
Archie公式是建立在物性较好的纯砂岩基础上的经验公式,对于纯砂岩含油饱和度的计算可以采用恒定的孔隙度指数m和饱和度指数n值;但对于低孔低渗泥质砂岩水淹层,m、n值不仅与孔隙度有关,还与地层水电阻率及储层阳离子交换量密切相关。大庆外围L油田是典型的低渗透油田。以岩电试验为基础,研究了m、n值的确定方法,并建立m、n值的经验模型;同时开展了水淹层地层水电阻率、含油饱和度及产水率模型的研究。在此基础上建立了水淹层的定量评价标准。建立的水淹层定量评价标准,与实际生产资料对比,取得了较好的效果,有效指导了L油田的后期开发。
Archie equations were the empirical ones established on the basis of pure sandstones with high porosity and permeability,and in which porosity exponent m and saturation exponent n are considered to be constant for oil saturation calculation of pure sandstones.However,m and n were not only related to porosity,also related to formation water resistivity and cationic exchange capacity of shaly-sand reservoirs with low permeability.L Oilfield outside Daqing Oilfield was a typical one with low permeability.Based on litho-electrical experiment,the method for determining m and n values is studied,an empirical model of m and n values is established,models of water-out reservoirs including formation water resistivity,oil saturation and water cut are studied,and based on the study,quantitative evaluation standards are established for the water-out reservoirs.Comparing with actual production data,the technique is used with better effect,and a guidance is provided for oil production at the late stage of L Oilfield.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2010年第6期97-102,529,共6页
Journal of Oil and Gas Technology
基金
国家自然科学基金项目(40773030)
关键词
Archie公式
岩电参数
水淹层
定量评价标准
低孔低渗泥质砂岩
shaly-sand reservoir
low porosity and permeability
water-out reservoir
Archie equation
litho-electrical parameter
quantitative evaluation of water-out reservoir
