引用本文:刘江涛,关小旭,贺桃娥,钟小红,易荣军,李艺,等. 纳米聚合物微球调剖剂的性能评价[J]. 石油与天然气化工, 2023, 52(4): 77-82.
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纳米聚合物微球调剖剂的性能评价
刘江涛1,关小旭2,贺桃娥3,钟小红2,易荣军4,李艺4,周明4
1.中国石化新疆新春石油开发有限责任公司;2.西南石油大学国家大学科技园 ;3.重庆市南川区生态环境监测站;4.西南石油大学新能源与材料学院
摘要:
目的 针对含有裂缝性低渗透油藏采用常规调剖剂封堵能力有限,调整吸水剖面效果差的实际工程问题,利用以丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和二甲基二烯丙基氯化铵(DMDAAC)为单体的纳米聚合物微球PADC-1作为调剖剂,以提高低渗透油藏采收率。方法 采用扫描电子显微镜、激光粒度分析仪、高温流变仪、岩心流动驱替实验装置等对聚合物微球的性能进行了评价,探讨了聚合物微球在高温、高盐、低渗透油藏调驱的适用性。结果 PADC-1的球形度较好,粒径分布窄,平均粒径为85.8 nm,具有良好的分散性和黏弹性；PADC-1吸水后快速膨胀,且随着温度升高,溶胀倍数呈现增大趋势,耐温能力在120 ℃以上,耐盐能力达1.8×105 mg/L,对不同渗透率岩心的采收率平均提高13.46%。结论 PADC-1纳米级聚合物微球通过吸水膨胀能有效改善不同渗透率地层的分流率,从而提高低渗透油藏的采收率。
关键词:  调剖  封堵  聚合物微球  纳米  低渗 
DOI：10.3969/j.issn.1007-3426.2023.04.013
分类号:
基金项目:
Performance evaluation of nano-polymer microsphere profile control agent
Liu Jiangtao1, Guan Xiaoxu2, He Tao'e3, Zhong Xiaohong2, Yi Rongjun4, Li Yi4, Zhou Ming4
1. Sinopec Xinjiang Xinchun Petroleum Development Co., Ltd., Dongying, Shandong, China;2. Southwest Petroleum University National University Science Park, Chengdu, Sichuan, China;3. Chongqing Nanchuan District Ecological Environment Monitoring Station, Chongqing, China;4. School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan, China
Abstract:
Objective In view of the practical engineering problems of the limited plugging capacity of conventional profile control agent for low permeability reservoirs with fractures and the poor effect of adjusting the water injection profile, nano-polymer microsphere PADC-1 using acrylamide (AM), 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and dimethyl diallyl ammonium chloride (DMDAAC) as monomers is used as profile control agent to improve the recovery of low permeability reservoirs. Methods The applicability of polymer microsphere in profile control and flooding were tested by microscope, laser particle size analyzer, high temperature rheometer and core flow displacement experimental device. The applicability of polymer microsphere in profile control and flooding of high temperature, high salinity and low permeability reservoirs was discussed. Results The experimental results show that PADC-1 has good dispersion and viscoelasticity for the properties of good sphericity, narrow particle size distribution, average particle size of 85.8 nm. PADC-1 swells rapidly after absorbing water, and the swelling ratio increases with the increase of temperature. PADC-1 has a temperature tolerance of more than 120 ℃ and a salt tolerance of 1.8×105 mg/L, the average oil recovery of cores with different permeability increases by 13.46%. Conclusion sNano-polymer microsphere PADC-1 can effectively improve the diversion rate of different permeability formations by water absorption and expansion, thereby improving the recovery efficiency of low permeability reservoirs.
Key words:  profile control  plugging  polymer microsphere  nano  low permeability