| 引用本文: | 郭学辉,沙帆,白军华,杜素珍,杨贺,崔卫斌,等. 岩心流动法筛选酸化助排剂[J]. 石油与天然气化工, 2011, 40(2): 190-194,101. |
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| 摘要: |
| 酸化作业时向酸液中添加助排剂可以提高残酸的返排率,但酸岩反应使残酸中含有大量的Ca2+,若残酸不能有效地排出会对地层造成新的更严重的堵塞。因此,助排剂不但应与酸液配伍,而且更重要的是要与高含量Ca2+残酸溶液配伍。目前有关的文献对于助排剂的研究在配伍性上仅评价与酸液的配伍性,在应用上主要是通过筛选表面与界面张力较低,助排率较高的助排剂来确定配方。而实际生产中助排剂的应用在配伍性上要求与酸液和残酸配伍,在应用效果上要求其提高反应后残酸溶液的排出程度,且不影响甚至提高地层岩石的渗透率。本试验评价了各种表面活性剂与酸液、残酸溶液的配伍性,通过岩心流动实验,对比分析筛选出了效果好、成本低的非氟表面活性剂助排剂配方。 |
| 关键词: 酸化 助排剂配伍性 岩心流动实验 助排率 |
| DOI： |
| 分类号:TE357.2 |
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| Screening of Acidification Cleanup Additive by Core Flow Method |
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Guo Xuehui1, Sha Fan1, Bai Junhua2
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1.College of Chemistry and Chemical Engineering of Xi’an Shiyou University, Xi’an,710065, Shanxi;2.Material Supplies of Zhongyuan Oilfield
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| Abstract: |
| Adding cleanup additives to acid when Acidizing operations can increase the rate of spent acid in the baek flow. But the acid reaction of acid rock contains large amounts of calcium, if not effective discharge of acid formation will create new and more serious blockage. Therefore, the cleanup additive should be not only compatible with the acid, but more importantly, with high levels of calcium combined with spent acid solution. At present, the literature studies for cleanup additive only estimate the compatibility with the acid, and the formula is determined by the main application effect with lower surface and interracial tension and higher cleanup rate.The cleanup agent requires to be compatible with acid and spent acid in actual production, and spent acid discharge level requires to be improved after the reaction on the application effect, and it won’t affect the permeability of rock formation, even may increase the permeability. The compatibility of various surface active agents with acid and spent acid solution is evaluated in this article. Through the core flow experiments and making comparative analysis, the non—fluorine surfactant cleanup additive formulations with good effect and tow cost are screened out. |
| Key words: acidification cleanup additive compatibility core flow experiment cleanup rate |
