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

Synthesis and Performance Evaluation of PAMAM-COONa：A Case Study of Block Huaziping of Changqing Oilfield

苏高申 罗跃 李凡 范春林 詹泽丞 刘磊

SU Gaoshen LUO Yue LI Fan FAN Chunlin ZHAN Zecheng LIU Lei

为解决长庆油田花子坪区块结CaCO3、CaSO4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CaCO3、CaSO4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CaCO3、CaSO4 的阻垢率为95.64%、92.35%，1.0G PAMAM-COONa 对CaCO3、CaSO4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。图10表4 参14

In order to resolve the CaCO3、CaSO4 scaling problem of Huaziping Block of Changqing oilfield，The scale inhibitors of 1.0G PAMAM-COONa and 2.0G PAMAM-COONa were obtained by the reaction between polyamidoamine （PAMAM） and chloroacetic acid，and then the molecular structures was established by FT-IR and elemental analysis. The scale inhibition performance of 1.0G PAMAM-COONa and 2.0G PAMAM-COONa tor CaCO3、CaSO4 was studied，and the scale inhibition performance of the complex scale inhibitor PNF-2.0G ，composed of the scale inhibitor PNF and 2.0G PAMAM-COONa at mass ratio of 1∶1，to the blend water of produced water Block Huaziping and the injection water at mass ratio of 1∶1 was studied. In addition，the field test was conducted. The results showed that the scale inhibition of PAMAM-COONa to CaCO3 and CaSO4 was better than that of PAMAM，and the scale inhibition of 2.0G PAMAM-COONa to CaCO3 and CaSO4 was better than that of 1.0G PAMAM-COONa at the temperature of 60℃ . At the dosage of 20 mg/L，the scale inhibition rate of 2.0G PAMAM-COONa to CaCO3、CaSO4 was about 95.64%，92.35% ，respectively，while the scale inhibition rate of 1.0G PAMAM-COONa to CaCO3、 CaSO4 was about 82.25%，89.36%，respectively. As for the blend water of the produced water of 97-42 well and the injection water， when the addition of was 20 mg/L，and the scale inhibition scale of the 2.0G PAMAM-COONa and PNF was 75.53% and 60.5%， respectively，while that of the PNF-2.0G was 95.56%. As for the blend water of the produced water of 100-45 well and the injection water，the scale inhibition rate of 2.0G PAMAM-COONa and PNF was 38.5% and49.5%，respectively，while that of the PNF-2.0G was 98.91%. The field test results showed that the compound scale inhibitor PNF-2.0G played an excellent scale inhibition effect.

10.19346/j.cnki.1000-4092.2017.02.031