Ilyasov Ilnur, Koltsov Igor, Golub Pavel, Tretyakov Nikolay, Cheban Andrei, Thomas Antoine
JSC "Messoyakhaneftegaz", Holodilnaya Street, 77, 625026 Tyumen, Russia.
JSC "Gazpromneft-TP", 50 Years of October Street, 14, 625048 Tyumen, Russia.
Polymers (Basel). 2021 Aug 16;13(16):2737. doi: 10.3390/polym13162737.
Polymer flooding is a well-established technique aimed at improved recovery factors from oilfields. Among the important parameters affecting the feasibility of a large deployment, polymer retention is one of the most critical since it directly impacts the oil bank delay and therefore the final economics of the project. This paper describes the work performed for the East-Messoyakhskoe oilfield located in Northern Siberia (Russia). A literature review was first performed to select the most appropriate methodology to assess polymer retention in unconsolidated cores at residual oil saturation. 4 polyacrylamide polymers were selected with molecular weights between 7 and 18 M Da and sulfonated monomer (ATBS) content between 0 and 5% molar. An improved 2-fronts dynamic retention method along with total organic carbon-total nitrogen analyzers were used for concentration measurement. Retention values vary between 93 and 444 The sentence could be rephrased μg/g, with the lowest given by the polymers containing ATBS, corroborating other publications on the topic. This paper also summarizes the main learnings gathered during the adaptation of laboratory procedures and paves the way for a faster and more efficient retention estimation for unconsolidated reservoirs.
聚合物驱油是一种成熟的技术，旨在提高油田的采收率。在影响大规模应用可行性的重要参数中，聚合物滞留是最关键的参数之一，因为它直接影响油带延迟，进而影响项目的最终经济效益。本文描述了针对位于俄罗斯西伯利亚北部的东梅索亚哈斯科耶油田所开展的工作。首先进行了文献综述，以选择最合适的方法来评估残余油饱和度下未固结岩心中的聚合物滞留情况。选择了4种聚丙烯酰胺聚合物，其分子量在7至18兆道尔顿之间，磺化单体（ATBS）含量在0至5摩尔%之间。采用改进的双前沿动态滞留方法以及总有机碳 - 总氮分析仪进行浓度测量。滞留值在93至444μg/g之间变化，含ATBS的聚合物给出的滞留值最低，这与该主题的其他出版物一致。本文还总结了在实验室程序调整过程中获得的主要经验教训，并为更快、更高效地估算未固结油藏中的聚合物滞留情况铺平了道路。
