首页> 外文期刊>Journal of Applied Polymer Science >Adaptability of a Hydrophobically Associating Polyacrylamide/ Mixed-Surfactant Combination Flooding System to the Shengli Chengdao Oilfield
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Adaptability of a Hydrophobically Associating Polyacrylamide/ Mixed-Surfactant Combination Flooding System to the Shengli Chengdao Oilfield

机译:疏水缔合聚丙烯酰胺/混合表面活性剂联合驱油体系对胜利城岛油田的适应性

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摘要

We investigated the performance of a combination flooding system composed of hydrophobically associating polyacrylamide (HAPAM) and a mixed surfactant [fatty acid disulfonate anionic gemini surfactant (DMES) plus the nonionic surfactant Triton X-100 (TX-100)] under the reservoir conditions of the Shengli Chengdao oilfield. With 1800 mg/L HAPAM and 300-3000 mg/L mixed surfactant, the surfactant-polymer (SP) flooding system reached an ultralow oil-water interfacial tension, and the viscosity of the system was greater than 40 mPa s. After the solution was aged for 120 days, its viscosity was still more than 40 mPa s; this indicated a good aging stability. The core flooding experiments with different porous media permeabilities showed that the SP flooding system created a higher resistance factor and residual resistance factor. In addition, the indoor flooding experiments indicated that the SP combination flooding system increased the enhanced oil recovery by more than 30% over that of the original oil in place compared with the water flooding system. Therefore, it was feasible to use an SP flooding system in the Chengdao oilfield.
机译:我们研究了由疏水缔合聚丙烯酰胺(HAPAM)和混合表面活性剂[脂肪酸二磺酸盐阴离子双子表面活性剂(DMES)加非离子表面活性剂Triton X-100(TX-100)]组成的组合驱油体系在油藏条件下的性能。胜利城岛油田。使用1800 mg / L的HAPAM和300-3000 mg / L的混合表面活性剂,表面活性剂-聚合物(SP)驱油体系达到了超低的油水界面张力,体系的粘度大于40 mPa s。溶液老化120天后,其粘度仍大于40mPa·s;这表明良好的老化稳定性。不同多孔介质渗透率的岩心驱油实验表明,SP驱油体系产生较高的阻力系数和残余阻力系数。此外,室内驱油实验表明,与水驱系统相比,SP组合驱油系统的采油量比原始采油系统提高了30%以上。因此,在城岛油田使用SP驱系统是可行的。

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