表面活性剂对致密砂岩储层自发渗吸驱油的影响

发布时间：2018-03-11 04:03

本文选题：中性致密砂岩储层　切入点：表面活性剂　出处：《断块油气田》2017年05期 　论文类型：期刊论文

【摘要】：自发渗吸驱油是致密砂岩油藏比较重要的一种采油方式。为了研究表面活性剂对长庆油田致密砂岩储层渗吸效果的影响,采用核磁共振技术,根据天然岩心在地层水和表面活性剂中的自发渗吸实验,研究了不同润湿性岩心自发渗吸的特点,以及表面活性剂对中性润湿砂岩渗吸结果的影响。实验结果表明:强水润湿砂岩的渗吸采出程度为60%左右,而中性润湿砂岩的渗吸采出程度只有33%左右;表面活性剂的加入能够有效提高中性润湿砂岩的渗吸采出程度,0.05%HYZ-5的效果最好。通过岩心驱替实验评价了HYZ-5表面活性剂对中性致密砂岩周期注水采收率的影响,可以看出HYZ-5可以显著提高周期注水的采收率。现场试验证明,A井采用周期注水,注入HYZ-5表面活性剂溶液渗吸驱油后,取得了明显的增产效果,说明表面活性剂可以提高致密砂岩储层的自发渗吸驱油效率。
[Abstract]:Spontaneous permeability and flooding is an important oil recovery method in tight sandstone reservoir. In order to study the effect of surfactant on permeability and absorption of tight sandstone reservoir in Changqing Oilfield, nuclear magnetic resonance (NMR) technique is used. Based on the spontaneous permeation experiments of natural cores in formation water and surfactant, the characteristics of spontaneous permeation in different wettable cores are studied. The experimental results show that the permeability recovery degree of strong water wetting sandstone is about 60%, while that of neutral wetting sandstone is only about 33%. The addition of surfactant can effectively improve the permeability and recovery degree of neutral wettable sandstone. The effect of HYZ-5 surfactant on cyclic water injection recovery of neutral tight sandstone is evaluated by core flooding experiment. It can be seen that HYZ-5 can significantly improve the recovery factor of periodic water injection. It shows that surfactant can improve the spontaneous permeability and oil displacement efficiency of tight sandstone reservoir.
【作者单位】：长江大学石油工程学院;中海油能源发展股份有限公司工程技术分公司;
【基金】：中石油科技创新基金项目“致密油体积压裂缝网与基质耦合流动机理研究”(2015D-5006-0208)
【分类号】：TE357.46

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