聚合物微球油藏适应性评价方法及调驱机理研究

发布时间：2018-01-09 22:28

  本文关键词：聚合物微球油藏适应性评价方法及调驱机理研究　出处：《石油化工》2017年07期 　论文类型：期刊论文

  更多相关文章： 大庆油藏 聚合物溶液 聚合物微球 粒径分布 储层适应性 驱油效果 机理分析

【摘要】：以大庆油田储层和流体物性为模拟对象,采用注入压力、含水率和采收率等评价指标,对聚合物微球油藏适应性评价方法及调驱机理进行研究。实验结果表明,随着水化时间的延长,微球吸水膨胀倍数(Q)增加,初期膨胀较快,之后膨胀减缓。与SMG_W相比,SMG_Y的Q增长较慢,Q较小。与聚合物相分子聚集体尺寸相比,SMG_W和SMG_Y微球状态粒径分布范围都较窄,具有更大的不可及孔隙体积。聚合物微球SMG_W和SMG_Y通过岩心时,压力达到稳定时的岩心渗透率极限值为237×10~(-3)μm~2和712×10~(-3)μm~2。聚合物微球调驱的调驱机理与聚合物驱不同,微球进入较大孔隙滞留和产生封堵作用,水进入较小孔隙发挥驱油作用。微球恒压实验的采收率增幅大于恒速实验的值,聚合物微球调驱(模型Ⅳ)的增油效果要优于聚合物驱(模型Ⅱ)的增油效果。
[Abstract]:Taking the reservoir and fluid physical properties of Daqing Oilfield as simulation object, the adaptability evaluation method and mechanism of polymer microsphere reservoir are studied by using injection pressure, water cut and oil recovery. The experimental results show that. With the prolongation of hydration time, the water swelling multiple (Q) of microspheres increased, the initial expansion was faster, and then the expansion slowed down. Compared with SMG_W, the Q of SMGY increased more slowly. Compared with the size of polymer phase molecular aggregates, the particle size distribution of SMGW and SMG_Y microspheres is narrower than that of polymer phase molecular aggregates. Has a larger unreachable pore volume. Polymer microspheres SMG_W and SMG_Y pass through the core. When the pressure reaches stability, the core permeability limit values are 237 脳 10 ~ (-3) 渭 m ~ (-2) and 712 脳 10 ~ (10 ~ (-3)) 渭 m ~ (-2) 路m ~ (2) respectively. The mechanism of polymer microsphere modulation flooding is different from that of polymer flooding. Microspheres enter larger pores and produce plugging effect, while water enters smaller pores to play the role of oil displacement. The increase of recovery factor of microsphere constant pressure experiment is larger than the value of constant velocity experiment. The oil increasing effect of polymer microsphere controlled flooding (model 鈪，

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