摘要
在注蒸汽开采稠油时,使用高温发泡剂可控制蒸汽窜流。关于高温发泡剂的合成及室内静态评价,前文已作了报导。本文报导在一维流动岩芯管内进行动态评价的结果。AOS_3和AAS_2及其工业放大样品的封堵能力已可与国外优秀样品相比。影响泡沫封堵的敏感因素是蒸汽驱后的含油饱和度,应小于20％,其次是渗透率,大于13％时封堵效果好。
Foam has been proposed as a permeabitity blocking agent in steam flooding to overcome channelling and gravity override of steam. The syntheses and laboratory evaluation under static conditions of two series of thermally stable foaming agents (AAS, alkylaryl sulfonates and AOS, long chain α-olefin sulfonates) have been reported previously. In this paper the results of laboratory sandpack tests are presented. These tests are conducted in a linear core flow model at 200℃ and the resistance factor of each test foamer is determined. Two high temperature foamers, AAS_2 and AOS_3, being in permeability blocking similar to superior control samples (Chevron's Chaser SD-1000 and Sun Refining's Suntech Ⅳ-FA), are selected and further investigated for sensitive influencing factors to be determined. It is found that effective permeability blocking by foam (high retistance factor) is observed when residual oil saturation of the core is less than 20% and its permeability is more than 13%. Recommended use level is 0.5-1.0% at initial stage and 0.25—0.5% after notable flow resistance is created.
出处
《油田化学》
CAS
CSCD
北大核心
1992年第3期242-247,共6页
Oilfield Chemistry
关键词
高温
发泡剂
注蒸汽
驱油
岩芯试验
High Temperature Foaming Agents, Laboratory Performance Evaluation, Permeability Blocking by Foam, Control of Steam Channelling, Resistance Factor, Steam Flooding
