聚合物改性硫化亚铁在饱和多孔介质中的迁移性能

doi:10.13278/j.cnki.jjuese.20180045

摘要/Abstract

摘要： 本文采用羧甲基纤维素钠（CMC）、瓜尔胶（Guar gum）对硫化亚铁（FeS）进行了改性，以增强FeS的稳定性和迁移性。通过实验考察了3种FeS（CMC-FeS、GG-FeS、Nano-FeS）的沉降性能及其在粗、中、细砂3种介质中的迁移性能，并根据胶体过滤理论计算了3种FeS在中砂中的沉积速率及在不同介质中的最大迁移距离。结果表明：改性后FeS的稳定性较高，抗沉降性能CMC-FeS > GG-FeS >> Nano-FeS；由穿透曲线看出，3种FeS在粗、中、细砂中的穿透能力（即出流质量浓度ρ_i与注入质量浓度ρ₀的比值）均为CMC-FeS > GG-FeS > Nano-FeS。粗砂和中砂中CMC-FeS的穿透能力明显高于GG-FeS，但细砂中二者的穿透能力相近，说明瓜尔胶的剪切稀化特性更利于GG-FeS在细颗粒介质中的迁移；FeS注入质量浓度的增加会导致更多的FeS沉积到介质中，但聚合物改性可以显著降低沉积速率，沉积速率CMC-FeS < GG-FeS < Nano-FeS；改性后CMC-FeS和GG-FeS在中砂的最大迁移距离分别是Nano-FeS的6.4倍和2.6倍，增加GG-FeS注入质量浓度对其最大迁移距离影响较小。

关键词: 硫化亚铁, 多孔介质, 硫化亚铁质量浓度, 迁移

Abstract: Nano-FeS was modified by sodium carboxymethyl cellulose (CMC) and guar gum to improve its performance of stability and migration. The sedimentation properties, migration properties, and deposition rates of three kinds of ferrous sulfide (CMC-FeS, GG-FeS, and Nano-FeS) were studied experimentally. According to the theory of colloid filtration, the maximum migration distances of the three kinds of FeS in different media were calculated. The results showed that the anti-settling property was CMC-FeS > GG-FeS >> Nano-FeS, and the polymer improved the suspending stability of FeS. The penetration curves showed that the penetrating ability (the ratio of outflow concentration ρ_i to injection concentration ρ₀) of the three kinds of FeS in three media was CMC-FeS > GG-FeS > Nano-FeS, and the penetration ability of CMC-FeS was higher than that of GG-FeS in coarse and medium sand, but was similar to that of GG-FeS in fine sand. It shows that the shear thinning property of guar gum is more conducive to the migration of GG-FeS in fine granular media. With the increase of FeS concentration,more FeS will be deposited in the medium, but polymer modification can significantly reduce the deposition rate:GG-FeS

Key words: FeS, porous media, FeS concentration, migration

中图分类号:

X523

洪梅, 杨慧萍, 陈韶音. 聚合物改性硫化亚铁在饱和多孔介质中的迁移性能[J]. 吉林大学学报(地球科学版), 2019, 49(4): 1121-1128.

Hong Mei, Yang Huiping, Chen Shaoyin. Polymer Modified FeS Migration Performance in Saturated Porous Media[J]. Journal of Jilin University(Earth Science Edition), 2019, 49(4): 1121-1128.

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