储层润湿性对低渗油藏CO2微观驱油特征的影响实验研究
DOI:
作者:
作者单位:

1.中国石化华东油气分公司;2.油气资源与探测国家重点实验室中国石油大学北京;3.中国石油勘探开发研究院

作者简介:

通讯作者:

中图分类号:

TE348

基金项目:

国家油气重大专项“大型油气田及煤层气开发”十三五课题:国内油气开发发展战略研究(2016ZX05016-006)


Influence of Wettability on The Microscopic Displacement Characteristics during CO2 Injection Process in Low-Permeability Sandstone Reservoirs
Author:
Affiliation:

1.Sinopec East China Oil and Gas Company,Taizhou;2.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum Beijing;3.Exploration and Development Research Institute,PetroChina

Fund Project:

the National Science and Technology Major Project of the Ministry of Science and Technology of China (Grant 2016ZX05016-006)

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

    储层润湿性是影响气驱效果的重要因素,针对不同润湿类型储层选择合适的CO2注入方式对提高采收率意义重大。利用核磁共振技术结合物理模拟实验,分析了不同润湿性岩心CO2驱替后微观剩余油分布,探讨了润湿性对低渗油藏不同CO2注入方式驱油特征的影响。研究表明,储层润湿性越偏向于油湿,原油分布的连续性越好,越有利于CO2的溶解和驱替。所以,油湿储层中各CO2注入方式均能取得较好的驱油效果,驱油效率均超过了70%;偏水湿储层中,水驱后注CO2驱油效果较好,且更易注入;混合润湿储层中,水气交替驱能获得更好的驱油效果。

    Abstract:

    Wettability is a significant factor affecting the oil recovery factor of gas flooding. In order to enhance oil recovery, it is of great importance to choose appropriate CO2 injection methods for oil reservoirs with different wettability. NMR technique and physical simulation experiment were combined to investigate the microscopic residual oil distribution after CO2 injection in the low-permeability cores with different wettability. The influence of wettability on the displacement characteristics of different CO2 injection methods was discussed. The results suggested that the continuity of oil distribution in pores is an important factor affecting the effect of CO2 flooding. The more oil-wet of the reservoir wettability is beneficial for the CO2 to dissolve into the oil and displace the oil. Therefore, each CO2 injection method could get better displacement efficiency which were over 70% in oil-wet reservoirs. For water-wet reservoirs, CO2 flooding after water flooding could have better displacement efficiency and injectivity. And for mixed wet reservoirs, WAG could have better displacement efficiency.

    参考文献
    相似文献
    引证文献
引用本文

钱 坤,黄 宇,杨正茂,等. 储层润湿性对低渗油藏CO2微观驱油特征的影响实验研究[J]. 科学技术与工程, , ():

复制
分享
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:2020-11-17
  • 最后修改日期:2021-03-22
  • 录用日期:2021-03-25
  • 在线发布日期:
  • 出版日期:
×
关于近期《科学技术与工程》编辑部居家办公的说明
亟待确认的版面费信息