高温高矿化度CO_2泡沫性能实验研究  

Experimental Study on Performance of CO_2 Foam at High Temperature and High Salinity Conditions

作　　者：宋鹤[1] 章杨[1] 陈百炼[1] 杨昌华[1,2] 王庆[2] 张亮[1] 任韶然[1] 

机构地区：[1]中国石油大学(华东),山东青岛266580 [2]中国石化中原油田分公司,河南濮阳457001

出　　处：《油田化学》2013年第3期380-383,388,共5页Oilfield Chemistry

基　　金：国家自然科学基金项目"基于气溶性表面活性剂的超临界CO2泡沫流度控制方法"(项目编号51174225);长江学者和创新团队发展计划资助(项目编号IRT1294);中央高校基本科研业务费专项资金资助"超临界二氧化碳泡沫稳定性评价实验研究"(项目编号12CX06030A);中央高校基本科研业务费专项资金资助"CO2干热岩地热开采及地质埋存可行性研究"(项目编号27R1202007A)

摘　　要：在高温、高矿化度条件下,通过测试起泡剂浓度、温度、矿化度和压力对CO2泡沫性能的影响,筛选出了耐温、耐盐性能良好的表面活性剂作为起泡剂,并通过动态驱替实验,考察了起泡剂在高温、高矿化度条件下的CO2泡沫的流度控制和封堵能力。实验结果表明,HLB值在14率16之间的两性和非离子表面活性剂复配的起泡剂泡沫稳定性较好;高压下（15MPa）所产生CO2泡沫更为稳定,在100℃下驱替实验所测得最大阻力因子达130,表现出良好的封堵和流度控制性能。泡沫仪测试和驱替实验结果对比表明,泡沫半衰期对阻力因子的影响更为敏感,是衡量泡沫稳定性和封堵能力的主要因素。CO2 foam has been used as an effective conformance and mobility control agent to prevent early gas breakthrough during CO2 flooding in heterogeneous reservoirs. In this study, the performance of CO2 foams generated using various surfactants was investigated. The effects of surfactant concentration, temperature, salinity and pressure on performance of CO2 foam were studied under high temperature and high salinity conditions prevailed in Zhongyuan oilfield. The performance of the CO2 foam on mobility control was measured via flooding and displacement experiments using sandpacks. The results showed that the complex of amphoteric stu＇faetants LX-8 and nonionic surfactants FL-6 with HLB values between 14 and 16 had good foam stability at high temperature and salinity conditions. The resistance factor of foams generated in sandpacks could reach up to 130 under 100~C and l 5 MPa, indicating that the CO2 foams had good mobility control and sealing capabilities at reservoir conditions. The experimental results also showed that the resistance was more sensitive to half life time of the CO2 foam, which could be the main factor to evaluate CO2 foam＇ s stability and blocking performance.

关 键 词：注CO2 提高采收率 CO2泡沫 高矿化度 阻力因子 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]