功能性调驱微球的荧光性与调驱性能研究
Study on Fluorescence and Profile Control and Flooding Properties of Functional Profile Control and Flooding Microspheres
董宏超 1张云宝 1于志刚 2李文涛 1杜若飞 1田鑫 1吴潇洋 1韩瑞林1
作者信息
- 1. 东北石油大学提高采收率重点实验室,黑龙江 大庆 163318
- 2. 中海石油(中国)有限公司湛江分公司,广东 湛江 524057
- 折叠
摘要
聚合物微球作为一种性能良好的深部调剖剂,广泛应用于油田注水开发中后期控水稳油工作的处理.由于渤海地区储层厚度大、非均质性严重,水驱开发效果较差,目前由于微球材料、检测方法的限制,难以较好实现微球调驱产出液的精准检测.针对现场实际需求,提出在聚合物微球中加入荧光碳点,制备具有荧光性的功能性调驱微球,利用马尔文粒径仪和荧光光谱仪对微球的微观结构和荧光特性进行表征,同时采用岩心驱替实验装置对其提高采收率能力进行评价.结果表明:该功能性调驱微球分散于模拟水中 5 d后,粒径大部分集中分布于0.9 μm和6.0 μm左右,具有一定的水化膨胀性.加入不同量荧光碳点制备的功能性调驱微球,其水分散液的荧光强度均随配制质量浓度的提高而增加.使用功能性调驱微球能够进一步提高采收率,采收率整体增幅18.22%.荧光强度测试法得到的微球质量浓度提高了检出灵敏度,能够实时监测各个端口微球质量浓度.
Abstract
As a kind of deep profile control agent with good performance,polymer microspheres are widely used in the treatment of water control and oil stabilization in the middle and late stage of oilfield waterflood development.Due to the large reservoir thickness and serious heterogeneity in Bohai Sea,the development effect of water flooding is poor.Currently,limited by microsphere materials and detection methods,it is difficult to achieve accurate detection of the output liquid of microsphere profile control and flooding.According to the actual needs of the field,adding fluorescent carbon points to polymer microspheres to prepare functional profile control and flooding microspheres with fluorescence was proposed.The microstructure and fluorescence characteristics of the microspheres were characterized by Malvern particle size analyzer and fluorescence spectrometer,and the enhanced oil recovery capability was evaluated by core displacement experimental equipment.The results showed that after dispersing in simulated water for 5 d,the particle size of the functional modulated microspheres was mostly concentrated in about 0.9 μm and 6.0 μm,which had certain hydration expansion.The fluorescence intensity of the aqueous dispersions of functional profile control and flooding microspheres prepared by adding different amounts of fluorescent carbon points increased with the increase of the preparation mass concentration.The use of functional modulated microspheres could further improve the oil recovery,with an overall increase of 18.22%.The fluorescence intensity measurement method improved the detection sensitivity and could monitor the microsphere mass concentration at each port in real time.
关键词
提高采收率/荧光强度/聚合物微球/调剖Key words
Enhanced oil recovery/Fluorescence intensity/Polymer microspheres/Profile control引用本文复制引用
基金项目
黑龙江省自然科学基金项目(LH2022E021)
教育部"春晖计划"国际合作科研项目(HZKY20220311)
海南省重点研发专项"揭榜挂帅"项目(ZDYF2024GXJS263)
出版年
2024
NETL
NSTL
万方数据