端羧基改性聚酰胺-胺的合成及其阻垢性能的研究——以长庆油田花子坪区块为例

发布时间：2018-07-14 19:26

【摘要】：为解决长庆油田花子坪区块结CaCO_3、CaSO_4垢的严重问题,采用氯乙酸为端基改性剂对1.0代和2.0代聚酰胺-胺树状聚合物进行端羧基改性合成了性能优良的阻垢剂1.0G PAMAM-COONa和2.0G PAMAM-COONa,通过红外光谱(FTIR)、元素分析等方法对其结构进行表征,考察了合成阻垢剂对CaCO_3、CaSO_4的阻垢性能及复配的阻垢剂PNF-2.0G(阻垢剂PNF、2.0G PAMAM-COONa质量比1∶1)对长庆油田化子坪的采出水/现场注入水混配水(质量比1∶1)的阻垢性能,并进行了现场试验。研究结果表明,60℃下,PAMAM-COONa的阻垢效果比聚酰胺-胺(PAMAM)的好、2.0G PAMAM-COONa的阻垢性能比1.0G PAMAM-COONa的效果好,在加药量为20 mg/L时,2.0G PAMAM-COONa对CaCO_3、CaSO_4的阻垢率为95.64%、92.35%,1.0G PAMAM-COONa对CaCO_3、CaSO_4的阻垢率为82.25%、89.36%。在加药量为20 mg/L时,对于97-42采出水/现场注入水的混配水,2.0G PAMAM-COONa和PNF单独使用时的阻垢率分别为75.53%和60.5%,而复配阻垢剂的阻垢率则高达95.56%;对于化100-45采出水/现场注入水的混配水,2.0G PAMAM-COONa和PNF单独使用时的阻垢率分别为38.5%和49.5%,而复配阻垢剂的阻垢率高达98.91%。经现场试验验证,该复配阻垢剂能起到优良的阻垢效果。
[Abstract]:In order to solve the serious problem of Caco _ 3C _ so _ 4 scale in Huaziping block of Changqing Oilfield, Using chloroacetic acid as terminal modifier, 1.0 and 2.0 generation polyamide-amine dendrimer were modified with carboxyl group to synthesize 1.0G PAMAM-COONa and 2.0G PAMAM-COONa.The structures were characterized by FTIR and elemental analysis. The scale inhibition performance of the synthetic scale inhibitor to CaCOS3 and CaSO4 and the scale inhibition performance of the compound scale inhibitor PNF-2.0G (mass ratio of PNF-2.0G PAMAM-COONa at 1:1) to the produced water / in-situ injected water mixture (1:1) in Huazuping Oilfield of Changqing Oilfield were investigated, and field tests were carried out. The results showed that the scale inhibition effect of PAMAM-COONa was better than that of 1.0G PAMAM-COONa at 60 鈩，

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