CO_(2)流度控制用稠化剂性能评价  

Performance evaluation of thickener for CO_(2)flow control

作　　者：王维波 王锰 周艳 江绍静 郭茂雷 康宵瑜 WANG Weibo;WANG Meng;ZHOU Yan;JIANG Shaojing;GUO Maolei;KANG Xiaoyu(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710065,China;Shaanxi Province Key Laboratory of CO_(2)Sequestration and Enhanced Oil Recovery,Xi’an 710065,China;Natural Gas Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710065,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710065 [2]陕西省二氧化碳封存与提高采收率重点实验室,陕西西安710065 [3]陕西延长石油(集团)有限责任公司天然气研究院分公司,陕西西安710065

出　　处：《应用化工》2024年第11期2622-2628,共7页Applied Chemical Industry

基　　金：陕西省创新能力支撑计划项目(2023-CX-TD-31);陕西延长石油(集团)有限责任公司科技攻关项目(ycsy2023ky-B-38,ycsy2024JCYJ-B-19)。

摘　　要：为了解决低渗透油藏CCUS技术应用过程中由CO_(2)气窜导致的无效注气、驱油效率下降等问题,选用一种经过改性的苯基缩水甘油醚与环氧丙烷共聚合产物YCL-2,作为特低渗油藏CO_(2)增稠剂,采用可视化高压容器观察YCL-2溶解性能,采用旋转流变仪研究了YCL-2不同浓度及温度下的流变性能,并对YCL-2在渗透率级差为5和10的岩心组中的驱替效果进行了考察,采用变径毛细管束模型模拟稠化剂体系计算不同渗透率岩心的封堵能力。结果表明,质量浓度2.0%以下的YCL-2可完全溶解在超临界CO_(2)中;流变实验表明,温度升高会降低体系耐剪切性能;选择性注入实验表明,体系对岩心微小孔隙具有一定的封堵作用,适用于渗透率级差小于5的油藏。In order to solve the problems of ineffective gas injection and decreased oil displacement efficiency caused by CO_(2)gas channelling in the application of CCUS technology in low permeability reservoir,YCL-2,a modified copolymerization product of phenyl glycidyl ether and propylene oxide,was selected as a CO_(2)thickener in extremely low permeability reservoir,and the solubility of YCL-2 was observed by visual high-pressure vessel.The rheological properties of YCL-2 at different concentrations and temperatures were studied by rotating rheometer,and the displacement effect of YCL-2 in core groups with permeability difference of 5 and 10 was investigated.The plugging ability of cores with different permeability was calculated by using varied-diameter capillary bundle model to simulate the thickener system.The results show that YCL-2 with mass concentration below 2.0%can be completely dissolved in supercritical CO_(2).Rheological experiments show that the shear resistance of the system decreases with the increase of temperature.The selective injection experiment shows that the system has a certain sealing effect on the small pores of the core,and is suitable for reservoirs with permeability difference less than 5.

关 键 词：低渗透油藏 CO_(2)稠化剂 气窜 渗透率级差 流度 

分 类 号：TQ050.4[化学工程] TE357.45[石油与天然气工程—油气田开发工程]