原位微乳液表面活性剂驱替低渗高凝油的适应性
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

中国石化重点科技攻关项目“低渗油藏化学剂的开发及应用”(项目编号210427),山东省自然科学基金项目“基于可控释放 型自生泡沫的低渗油藏增能-调驱一体化提高采收率方法”(项目编号ZR201911080151)


Adaptability of an In-situ Microemulsion Surfactant in Displacing the High-pour-point Oil from Low Permeability Reservoir
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    针对高凝油注水开发效果差的问题,为了明确一种能与原油形成原位微乳液的高效表面活性剂IMS驱替 高凝油的适应性,开展了表面活性剂-高凝油相互作用和单一表面活性剂、二元复合驱体系及泡沫驱油实验。研 究结果表明,质量分数为0.1%的表面活性剂IMS可将界面张力降至0.6×10-3mN/m,所形成的微乳液优先増溶高 凝油中的轻质组分,难以显著改变高凝油的析蜡点和凝固点。质量分数为0.1%~2.0%、用量为0.25~0.5 PV的 表面活性剂IMS吞吐或驱替,原油采收率增幅在1.7%~12.3%,进一步焖井浸泡不能明显改善驱油效果。聚合 物或泡沫的引入能够增强表面活性剂驱油能力,对应二元复合驱体系(1.0%表面活性剂+0.2%聚合物,0.5 PV)采 收率增幅为18.4%,不同浓度表面活性剂泡沫驱(1.0%和0.3%,气液比2∶1,起泡液0.5 PV)采收率增幅分别为 17.3%和16.8%。但是二元复合驱的注入压力高,在低渗高凝油藏中存在堵塞风险,而泡沫体系驱的注入压力相 对低,是提高采收率的较好方法。

    Abstract:

    In view of the poor development of high-pour-point oil by cold water injection,a high-efficiency surfactant that can form microemulsion with crude oil was used,and the adaptability of the surfactant for enhancing high-pour-point oil recovery was determined through analyzing the surfactant-oil interaction and high-pour-point oil displacements effect by single surfactant,the corresponding combination and foam systems. The results showed that the surfactant IMS with mass fraction of 0.1% could effectively reduce the oil-water interfacial tension to 0.6×10-3 mN/m. The obtained microemulsion could dissolve preferentially the light component of oil,which could not significantly reduce the wax-evolution point and freezing point of the high-pour-point oil. The oil recovery by surfactant huff-n-puff and displacing injection with concentrations of 0.1%—2.0% and utilizations of 0.25—0.5 PV was 1.7%—12.3%,and additional soaking operation could not further improve such oil recovery. The presence of polymer or foam in surfactant solutions could obviously enhance the oil displacement,and the oil recovery by the corresponding binary combination flooding system of 1.0% surfactant+0.2% polymer with the injection volume of 0.5 PV was 18.4%,while those of the surfactant foams with different surfactant concentrations of 1.0% and 0.3% when gas liquid ratio was 2∶1 and the surfactant solution volume was 0.5 PV,were 17.3% and 16.8%,respectively. However,the binary combination flooding behaved a high injection pressure and had underlying injection problem in the low permeability reservoirs,while the foam system performed a relatively low injection pressure and could enhance oil recovery effectively.

    参考文献
    相似文献
    引证文献
引用本文

李强,丁名臣,张星,吴寒超,陈利霞,王业飞.原位微乳液表面活性剂驱替低渗高凝油的适应性[J].油田化学,2022,39(3):474-479.
LI Qiang, DING Mingchen, ZHANG Xing, WU Hanchao, CHEN Lixia, WANG Yefei. Adaptability of an In-situ Microemulsion Surfactant in Displacing the High-pour-point Oil from Low Permeability Reservoir[J]. OILFIELD CHEMISTRY,2022,39(3):474-479.

复制
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:
  • 最后修改日期:
  • 录用日期:
  • 在线发布日期: 2022-10-20
  • 出版日期:
点击这里给我发消息

点击这里给我发消息