在用碱的化学驱油中硅铝垢的生成Ⅰ碱与高岭土的成垢性能  

ALUMOSILICATE SCALE FORMATION OWING TO ALKALIS IN CHEMICAL FLOODING SOLUTIONS I PRECIPITATION OF ALUMOSILICATES IN ALKALI/KAOLINITE SYSTEMS

作　　者：刘伟成[1] 颜世刚[1] 姜炳南[1] 刘昌其[1] 

机构地区：[1]中国科学院大连化学物理研究所

出　　处：《油田化学》1996年第1期64-67,共4页Oilfield Chemistry

摘　　要：考察了不同条件（包括碱类型、浓度、温度和压力）下．碱-高岭土体系中硅铝垢的生成。碱类型不同，生成的垢物不同。在Na_4SiO_4-高岭土体系中生成高硅垢，在NaOH-高岭土体系中则生成低硅垢。碱浓度、温度和压力的升高促进垢的生成。Na_2CO_3作为一种碱剂，强度较弱，与高岭土的成垢倾向较小。The precipitation of alumosilicates(Al-Si) from aqueous alkali solutions on kaolinite (K) in reaction of K with different alkalis is investigated by X-ray diffraction to help in selecting alkali(s) for chemical flooding solutions. It is shown that at 80℃ a Al-Si precipitate of high ratio Si/Al ～Z, HS1, is formed with 5% Na_4SiO_4 in 120 hrs;Al-Si precipitates of low ratios Si/Al～1 or less- with 5% NaOH in 20 hrs and more; no precipitate- with 5% Na_2CO_3 in 360 hrs. Increasing alkali concentrations (in range 1, 5, 10%), temperatures (in range 40, 60, 80℃) and pressure of reaction (in range 0, or normel pressure, 5, 10 MPa) leads to enhancements in precipitation.The tendency of Na_2CO_3-K system to precipitate Al-Si is weak. All the Al-Si species are chemically identified.

关 键 词：碱 碱岩 相互作用 硅铝垢 油层结垢 化学驱油 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]