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压裂液存留液对致密油储层渗吸替油效果的影响

郭钢 薛小佳 李楷 范华波 刘锦 吴江

郭钢, 薛小佳, 李楷, 范华波, 刘锦, 吴江. 压裂液存留液对致密油储层渗吸替油效果的影响[J]. 钻井液与完井液, 2016, 33(6): 121-126. doi: 10.3969/j.issn.1001-5620.2016.06.022
引用本文: 郭钢, 薛小佳, 李楷, 范华波, 刘锦, 吴江. 压裂液存留液对致密油储层渗吸替油效果的影响[J]. 钻井液与完井液, 2016, 33(6): 121-126. doi: 10.3969/j.issn.1001-5620.2016.06.022
GUO Gang, XUE Xiaojia, LI Kai, FAN Huabo, LIU Jin, WU Jiang. Effect of Retained Fracturing Fluid on the Imbibition Oil Displacement Effciency of Tight Oil Reservoir[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(6): 121-126. doi: 10.3969/j.issn.1001-5620.2016.06.022
Citation: GUO Gang, XUE Xiaojia, LI Kai, FAN Huabo, LIU Jin, WU Jiang. Effect of Retained Fracturing Fluid on the Imbibition Oil Displacement Effciency of Tight Oil Reservoir[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(6): 121-126. doi: 10.3969/j.issn.1001-5620.2016.06.022

压裂液存留液对致密油储层渗吸替油效果的影响

doi: 10.3969/j.issn.1001-5620.2016.06.022
详细信息
    作者简介:

    郭钢,1986年生,硕士研究生,毕业于西安石油大学化学工艺专业,主要从事油气田化学领域的科研与应用工作。电话15829293383;E-mail:guog_cq@petrochina.com.cn。

  • 中图分类号: TE357.12

Effect of Retained Fracturing Fluid on the Imbibition Oil Displacement Effciency of Tight Oil Reservoir

  • 摘要: 统计长庆油田罗*区块2015年存地液量与油井一年累积产量的关系发现,存地液量越大,一年累积产量越高,与常规的返排率越高产量越高概念恰恰相反,可能与存地液的自发渗吸替油有关。核磁实验结果表明,渗吸替油不同于驱替作用,渗吸过程中小孔隙对采出程度贡献大,而驱替过程中大孔隙对采出程度贡献大,但从现场致密储层岩心孔隙度来看,储层驱替效果明显弱于渗吸效果。通过实验研究了影响自发渗吸效率因素,探索影响压裂液油水置换的关键影响因素,得出了最佳渗吸采出率及最大渗吸速度现场参数。结果表明,各参数对渗吸速度的影响顺序为:界面张力 > 渗透率 > 原油黏度 > 矿化度,岩心渗透率越大,渗吸采收率越大,但是增幅逐渐减小;原油黏度越小,渗吸采收率越大;渗吸液矿化度越大,渗吸采收率越大;当渗吸液中助排剂浓度在0.005%~5%,即界面张力在0.316~10.815 mN/m范围内时,浓度为0.5%(界面张力为0.869 mN/m)的渗吸液可以使渗吸采收率达到最大。静态渗吸结果表明:并不是界面张力越低,采收率越高,而是存在某一最佳界面张力,使地层中被绕流油的数量减少,渗吸采收率达到最高,为油田提高致密储层采收率提供实验指导。

     

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出版历程
  • 收稿日期:  2016-09-28
  • 刊出日期:  2016-11-30

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