On evaluating the potential of nanocomposites for heavy oil recovery
On evaluating the potential of nanocomposites for heavy oil recovery
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评估纳米复合材料用于稠油采收的潜力
DOI：
10.1007/s13202-021-01112-6
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
K. Sasaki
中科院分区：
文献类型：
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作者：
H. Inoue;R. Nguele;Nchimi Nono Katia;K. Sasaki
研究了纳米复合材料在稠油地层中的增产潜力。从铝土矿中提取NCP，光谱表征表明NCP是一种结晶材料，其基质由64.5wt.%氧化铝（Al 2 O3），15.7重量%氧化铁（Fe 2 O3）和19.8重量%氧化硅（SiO2）。通过将NCP分散到目标地层盐水中获得的纳米复合材料流体在前两天内显示出良好的分散，超过这两天，观察到肉眼可见的异质聚集。对饱和重矿物油（ρ= 0.854 g/cm 3）的Berea砂岩进行的岩心驱替试验显示，0.25wt%分散在地层盐水中的NCP的回收率差。然而，将NCP中的负载从0.25重量%增加到0.75重量%，随后加入1重量%使用相同的地层盐水，在水驱阶段之后，显示出油采收率增加高达14.1%。进一步发现，如果0.25重量%，则RF可高达18.3%。将NCP分散在表面活性材料（聚乙烯醇，PVA）中。结果比单独使用PVA的情况高4%。此外，它表明，改变预冲洗液的组成可以增加产量高达11.3%。与单一纳米颗粒的对比分析表明，使用NCP的EOR比单独使用SiO2的EOR高6倍，比单独使用Al 2 O3或Fe 2 O3的EOR低1.5倍。
The present work investigates potential of nanocomposite (NCP) for enhancing the production in heavy oil formation. NCP was extracted from bauxite ore and the spectral characterization revealed that NCP was a crystalline material whose matrix consists of 64.5 wt.% alumina oxide (Al2O3), 15.7 wt.% iron oxide (Fe2O3), and 19.8 wt.% silica oxide (SiO2). The nanocomposite fluid, obtained by dispersing NCP into the targeted formation brine, showed a good dispersion over the two first days beyond which a hetero-aggregation, visible to the naked eye, was observed. Coreflooding assays, performed on Berea sandstone saturated with a heavy mineral oil (ρ= 0.854 g/cm3), revealed that 0.25wt.% of NCP dispersed in the formation brine yields a poor recovery. However, increasing the load in NCP from 0.25 to 0.75 wt.% and subsequently 1 wt.% using the same formation brine, showed an increase in the oil recovery up to 14.1% after the waterflooding stage. It was further found that the RF could be as high as 18.3% if 0.25 wt.% NCP was dispersed in a surface-active material (Polyvinyl alcohol, PVA in this study). The result was 4% higher than a scenario in which PVA was used alone. Moreover, it was shown that altering the composition of the preflush could increase the production to up to 11.3%. A comparative analysis with single nanoparticle revealed that the EOR using NCP was six-fold higher compared to that of SiO2taken alone and 1.5-fold lower than those of Al2O3or Fe2O3taken alone.