超支化疏水缔合聚合物 HBPAM的性能及驱油效率
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Performance Evaluation and Oil Displacement Properties of Preparation of Hyperbranched Association Polyacrylamide HBPAM
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    摘要:

    为了提高三采污水配制聚合物溶液的性能,对比评价了超支化缔合聚合物 HBPAM和现场在用的 KYPAM聚合物的增黏性能、黏弹性能、抗盐性能、长期稳定性能、抗剪切性能以及驱油效果,并观察了二者的微观形貌。研究结果表明,当浓度高于临界缔合浓度(1250 mg/L)后,HBPAM具有较强的增黏性能和黏弹性能;与 KYPAM相比,HBPAM具有更好的抗盐性能和长期稳定性能。污水配制的浓度 1500 mg/L的 KYPAM溶液,在油藏条件老化 180 d 后的黏度仅为 13 mPa·s 左右,黏度保留率仅 20%,而相同处理条件下,HBPAM 溶液的黏度大于 50mPa·s,黏度保留率在 80%左右。HBPAM溶液具有较强的抗剪切稳定性,机械剪切速率 15000 s-1作用后再静置24 h,浓度 1500 mg/L的 HBPAM溶液的黏度保留率为 85%~89%,扫描电镜结果显示 HBPAM具有更加规整的三维网状结构。岩心驱替实验结果表明,在水驱基础上,注 0.3 PV 的 1500 mg/L 的 HBPAM 溶液提高采收率16.5%,比黏度相近的浓度 1800 mg/L的 KYPAM溶液提高采收率幅度高 5.0%。与 KYPAM溶液相比,相同黏度的 HBPAM溶液更能改善油藏非均质性。图 11表 4参 15

    Abstract:

    In order to improve the performance of the polymer solution prepared with the tertiary oil recovery wastewater,compare to the KYPAM,the viscosification property,viscoelasticity,salt resistance,long-term stability performance and oil displacement properties was investigated,and the structure of HBPAM and KYPAM solution was observed. The research results showed that when the HBPAM concentration reached up to its critical association concentration of 1250 mg/L,HBPAM had stronger viscosity and viscoelastic properties. Compared with KYPAM,HBPAM had better salt resistance and long-term stability. The viscosity of the KYPAM solution,prepared from sewage with the concentration of 1500 mg/L,was only around 13 mPa·s after being aged for 180 days under the reservoir condition,and the viscosity retention rate was only 20%;while under the same treatment conditions,the viscosity of HBPAM solution was greater than 50 mPa·s,and the viscosity retention rate was about 80%. HBPAM solution had better shear resistance The viscosity retention rate of HBPAM solution with concentration of 1500 mg/L was 85%~89% after mechanical shear action of 1500 s-1 and then stand for 24 h . SEM results showed that HBPAM has more regular three-dimensional network structure. Experimental results of core displacement showed that on the basis of water flooding,the injection of the 0.3 PV HBPAM solution with the concentration of 1500 mg/L could make the oil recovery be enhanced by 16.5%,which was 5.0% higher than that of KYPAM solution with similar viscosity and concentration of 1800 mg/L. Compared with KYPAM solution,the HBPAM solution with the same viscosity could effectively improve the heterogeneity of oil reservoir.

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关 丹,王兴华,任 豪,阙庭丽.超支化疏水缔合聚合物 HBPAM的性能及驱油效率[J].油田化学,2018,35(4):676-681.
GUAN Dan, WANG Xinhua, REN Hao, Que Tingli. Performance Evaluation and Oil Displacement Properties of Preparation of Hyperbranched Association Polyacrylamide HBPAM[J]. OILFIELD CHEMISTRY,2018,35(4):676-681.

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  • 在线发布日期: 2019-01-28
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