大庆石油地质与开发2012，Vol.31Issue(4)：50-56,7.DOI:10.3969/J.ISSN.1000-3754.2012.04.011
水驱和聚合物驱油藏地球化学特征
GEOCHEMICAL CHARACTERISTICS OF OIL RESERVOIRS FLOODED BY WATER AND POLYMER
摘要
Abstract
Geochemical researches of an oil reservoir are the basis of exploiting the remained oil by comprehensively tapping the potentials in water flooding and fine adjustment to polymer flooding. 51 oil-sand samples are collected in Pul Formation of two close-spacing comparing & inspecting wells in West Beil Fault Block of Saertu Oilfield before and after polymer flooding. Experimental data were gained by coring analysis, such as the remained oil viscosity, mobility, oil saturation, oil displaced efficiency and so on. The experimental study results show that the distributions of the above parameters after water and polymer floodings are characterized by a certain heterogeneity. The remained oil becomes more thicker after polymer flooding than water flooding, and furthermore the exploitation potentials of the remained oil are obviously reduced, the oil displaced efficiency is remarkably increased and heterogeneities of the oil displaced efficiency and oil saturation are weakened; polymer flooding technique can enhance the oil displaced efficiencies of the oil reservoirs with different physical properties, water flooding technique can enhance oil displaced efficiencies of the oil layers with high, middle and low permeabilites, but in extra-high permeability oil layer, there exists" futile cycle" and moreover the increasing tend of the permeability can be reduced; the method to enhance the displaced efficiency of waterflooded oil reservoir is to reduce the oil viscosity and increase the viscosity of water flooding solution, that is adding viscous chemical agents; the similar method for the polymer flooded oil reservoirs is to reduce the remained oil viscosity, increase the polymer-flooding solution viscosity and improve the physical properties of the oil reservoirs.关键词
萨尔图油田/水驱/聚驱/剩余油黏度/油藏流度/含油饱和度/驱油效率Key words
Saertu Oilfield/ water flooding/ polymer flooding/ remained oil viscosity/ oil reservoir mobility/ oil saturation/ oil displaced efficiency分类
能源科技引用本文复制引用
张居和,冯子辉,方伟,张琨..水驱和聚合物驱油藏地球化学特征[J].大庆石油地质与开发,2012,31(4):50-56,7.基金项目
国家重点基础发展计划"973"项目(2006CB701404)资助. （2006CB701404）
