西南石油大学学报(自然科学版) ›› 2019, Vol. 41 ›› Issue (5): 105-111.DOI: 10.11885/j.issn.1674-5086.2018.07.11.01

• 石油与天然气工程 • 上一篇    下一篇

新疆油田砾岩油藏聚合物驱窜流特征及调剖对策

唐可1, 纪萍2, 汪学华3, 罗强1   

  1. 1. 中国石油新疆油田分公司实验检测研究院, 新疆 克拉玛依 834000;
    2. 中国石油新疆油田公司采油一厂, 新疆 克拉玛依 834000;
    3. 中国石油新疆油田公司石西作业区, 新疆 克拉玛依 834000
  • 收稿日期:2018-07-11 出版日期:2019-10-10 发布日期:2019-10-10
  • 通讯作者: 唐可,E-mail:tangke_xj@petrochina.com.cn
  • 作者简介:唐可,1985年生,男,汉族,四川南充人,工程师,硕士,主要从事提高采收率技术研究。E-mail:tangke_xj@petrochina.com.cn;纪萍,1971年生,女,回族,新疆塔城人,工程师,主要从事油气田开发工作。E-mail:jiping@petrochina.com.cn;汪学华,1978年生,女,汉族,四川内江人,高级工程师,主要从事油气田开发方面的工作。E-mail:sxytwxh@petrochina.com.cn;罗强,1972年生,男,汉族,四川仁寿人,高级工程师,博士,主要从事提高采收率方面的工作。Email:luoq33@petrochina.com.cn
  • 基金资助:
    国家科技重大专项(2016ZX05053–006)

Channeling Characteristics and Profile Modification Measures for Polymer Flooding in Conglomerate Reservoirs in Xinjiang Oilfield

TANG Ke1, JI Ping2, WANG Xuehua3, LUO Qiang1   

  1. 1. Research Institute of Experiment and Detection, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    2. The First Oil Production Plant, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China;
    3. Shixi Oil Production Zone, PetroChina Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
  • Received:2018-07-11 Online:2019-10-10 Published:2019-10-10

摘要: 聚合物驱过程中的聚合物窜流是影响聚合物驱效果的重要因素。针对七东1区克下组砾岩油藏特殊的复模态孔隙结构,通过室内并联岩芯物理模拟实验研究了聚合物驱窜流特征及调剖对策。研究表明,砾岩油藏渗透率变异系数低于0.3时,聚合物驱不发生窜流;渗透率变异系数高于0.5时,聚合物改善剖面作用有限,发生窜流,且窜流导致聚合物驱见效后高渗岩芯含水率迅速回升;随着渗透率变异系数增大,聚合物在高渗层突破时间缩短,聚窜发生越早和越严重,聚窜后高渗层吸液百分数从52%增大到75%;聚窜后及时调剖,能有效控制聚窜和发挥聚合物驱作用,采收率提高28.75%;聚合物驱全过程调剖是治理聚窜的理想对策。

关键词: 砾岩油藏, 聚合物驱, 窜流特征, 强非均质性, 调剖

Abstract: Polymer flooding channeling is an important factor affecting polymer flooding. Targeting the complex mode pore structure, which is special to the conglomerate reservoirs in Qidong-1 Area, crossflow characteristics and profile modification measures of polymer flooding were studied through physical simulation experiments conducted indoors in parallel with those at the rock cores. The study shows that, when the permeability variation coefficient of the conglomerate reservoirs is less than 0.3, no crossflow occurs in polymer flooding; when it is larger than 0.5, the effect of profile improvement by the polymer is limited, and channeling occur, which lead to a rapid rebound in water content of highly permeable cores after polymer flooding takes effect. As the permeability variation coefficient increases, the time taken for the polymer to break through the highly permeable layer is shortened, channeling occur earlier and more severely, and subsequently, the percentage of liquid absorption in the highly permeable layer is increased from 52% to 75%. With timely profile modification after channeling, channeling can be effectively controlled while polymer flooding takes effect, increasing the recovery rate by 28.75%.

Key words: conglomerate reservoir, polymer flooding, characteristics of polymer channeling, strong reservoir heterogeneity, profile control

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