西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

特低渗非均质油藏水窜后提高波及效率研究

王伟1 *,杨辉2,黄春霞1,江绍静1,岳湘安3   

  1. 1 . 陕西延长石油(集团)有限责任公司研究院,陕西西安710075
    2. 中国石油长庆油田公司,陕西西安710018
    3. 中国石油大学石油工程教育部重点实验室,北京昌平102249
  • 出版日期:2016-06-01 发布日期:2016-06-01
  • 通讯作者: 王伟,E-mail:oilren@qq.com
  • 基金资助:

    国家科技支撑计划(2012BAC26B00);国家科技重大专项(2011ZX05009 004 004)。

Researches on Improving Sweep Efficiency After Water Breakthrough in#br# Ultra-low Permeability Heterogeneous Reservoir

WANG Wei1*, YANG Hui2, HUANG Chunxia1, JIANG Shaojing1, YUE Xiangan3   

  1. 1. Research Institute of Shaanxi Yanchang Petroleum(GROUP)Co. Ltd.,Xi′ an,Shaanxi 710075,China
    2. Changqing Oilfield Company,PetroChina,Xi′ an,Shaanxi 710018,China
    3. MOE Key Laboratory of Petroleum Engineering,China University of Petroleum,Changping,Beijing 102249,China
  • Online:2016-06-01 Published:2016-06-01

摘要:

针对特低渗油藏水驱开发易窜流、调剖治理效果差等问题,开展了特低渗非均质油藏治理窜流、提高波及效
率的室内模拟实验。层内非均质储层模型调剖驱油实验表明,特低渗非均质油藏调剖后水驱与中高渗油藏相比后续
注入压力高,难以提高波及效率;水驱后直接转注天然气,气体继续沿水窜通道流动;但采用调剖后天然气驱,不仅后
续注入压力低,且能够提高采收率约7.8%,气驱后还可间歇注气进一步提高采收率约9.6%。因此,特低渗油藏水窜后
应采用调剖后气驱的调剖驱油方式,可有效扩大驱油剂的波及体积,提高采收率。

关键词: 特低渗油藏, 水窜, 调剖, 天然气驱, 间歇注气, 波及效率

Abstract:

Focusing on the water channeling and the bad results of profile control in ultra-low permeability reservoir,the
laboratory simulation experiments were conducted to study the anti-channeling and expanding sweep volume methods. The
experiments of profile control and oil displacement were run in the reservoir models with interlayer heterogeneity,which shows
that,the water injection pressure after profile control is higher than that in mid-high permeability reservoir,and it is difficult to
improve the sweep efficiency in ultra-low permeability reservoir. Gas flows along water channeling path when injected directly
after water flooding. Injecting gas after profile control can not only reduce the subsequent injection pressure but also improve
the recovery by about 7.8%. The recovery can be improved by about 9.6% in the intermittent gas injection process after gas
flooding. Therefore,injecting gas after profile control can be used after water channeling in ultra-low permeability reservoir to
effectively expand sweep volume and improve the recovery.

Key words: ultra-low permeability reservoir, water channeling, profile control, natural gas flooding, intermittent gas injection,
sweep efficiency

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