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

低渗透储层可动剩余油核磁共振分析

李海波1,2,3 *,郭和坤1,3,周尚文1,孟智强2,3,王学武1,3   

  1. 1. 中国石油勘探开发研究院廊坊分院,河北廊坊065007
    2. 中国科学院大学,北京石景山100493
    3. 中国科学院渗流流体力学研究所,河北廊坊065007
  • 出版日期:2016-02-01 发布日期:2016-02-01
  • 通讯作者: 李海波,E-mail:lihaibo05@petrochina.com.cn
  • 基金资助:

    国家科技重大专项(2011ZX05013 006)。

NMR Analysis of Movable Remaining Oil of Low Pemeability Reservoir

LI Haibo1,2,3*, GUO Hekun1,3, ZHOU Shangwen1, MENG Zhiqiang2,3, WANG Xuewu1,3   

  1. 1. Langfang Branch,PetroChina Research Institute of Petroleum Exploration & Development,Langfang,Hebei 065007,China
    2. University of Chinese Academy of Sciences,Shijingshan,Beijing 100049,China
    3. Institute of Porous Flow and Fluid Mechanics,Chinese Academy of Sciences,Langfang,Hebei 065007,China
  • Online:2016-02-01 Published:2016-02-01

摘要:

针对有代表性密闭取芯岩芯平行样,分别进行油水饱和度和油水高速离心驱替实验核磁共振分析,定量获得
储层目前剩余油饱和度、采出油相对量、可动油饱和度及驱油效率上限等参数,对比各参数建立储层可动剩余油饱和
度核磁共振分析方法。研究表明,建立岩芯饱和油束缚水状态和水驱油的最佳离心力分别为2.250 MPa 和0.220 MPa,
4 个渗透率级别(>50、[10,50)、[1,10)和<1 mD)储层采出油饱和度分别为23.49%、16.81%、8.70% 和9.99%,可动油
饱和度分别为50.34%、43.76%、29.67% 和22.89%,可动剩余油饱和度分别为26.85%、26.95%、20.97% 和12.90%,由
于储层非均质性影响,大于10 mD 储层采出油明显高于10 mD 以下储层,但大于10 mD 储层可动油饱和度较高,故可
动剩余油饱和度也较高,小于1 mD 的储层可动剩余油明显低于其他储层。

关键词: 低渗透储层, 高速离心, 核磁共振, 可动剩余油, 非均质性

Abstract:

This study analyzes oil-water saturation of reservoir and high-speed centrifugal oil-water displacement experiment
by NMR respectively aiming at representative Parallel cores form sealed coring,and establishes NMR method for reservoir
movable remaining oil saturation analysis through quantitatively comparing parameters,which include reservoir remaining oil
saturation at present,relative quantity of produced oil,movable oil saturation and upper efficiency of oil displacement. The
research shows that the best centrifugal forces to set up saturated oil bound water state and to drive oil are 2.250 MPa and
0.220 MPa respectively. For four permeability level(>50、[10,50)、[1,10)and <1 mD)reservoir,produced oil saturation
are 23.49%,16.81%,8.70% and 9.99% respectively;movable oil saturation are 50.34%,43.76%,29.67% and 22.89% respectively,
and movable remaining oil saturation are 26.85%,26.95%,20.97% and 12.90% respectively. Produced oil saturation
of reservoir above 10 mD is higher than that of reservoir less 10 mD,which is obviously due to reservoir heterogeneity,but
movable remaining oil saturation of reservoir greater than 10 mD is higher because of its higher movable oil saturation. Movable
remaining oil saturation of reservoir less than 1 mD is lower than that of other reservoirs evidently.

Key words: low pemeability reservoir, high speed centrifugation, NMR, movable remaining oil, heterogeneity

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