驱替过程中重力舌进特征的核磁共振可视化实验

doi:10.7623/syxb201710008

石油学报 ›› 2017, Vol. 38 ›› Issue (10): 1183-1188.DOI: 10.7623/syxb201710008

驱替过程中重力舌进特征的核磁共振可视化实验

狄勤丰^1,2, 张景楠^1,2, 叶峰^1,2, 王文昌^1,2, 陈会娟^1,2, 华帅^1,2

1. 上海大学上海市应用数学和力学研究所上海 200072;
2. 上海市力学在能源工程中的应用重点实验室上海 200072

收稿日期:2016-07-06 修回日期:2017-07-31 出版日期:2017-10-25 发布日期:2017-11-02
通讯作者: 王文昌,男,1982年5月生,2003年获兰州大学理论力学专业学士学位,2011年获上海大学工程力学专业博士学位,现为上海大学讲师,主要从事石油工程中的力学问题研究.Email:wangwenchang1982@163.com
作者简介:狄勤丰,男,1963年8月生,1984年获华东石油学院钻井工程专业学士学位,1997年获西南石油学院油气井工程专业博士学位,现为上海大学教授、博士生导师,主要从事石油工程技术和力学问题的研究.Email:qingfend@sina.com
基金资助:
国家自然科学基金项目（No.U1663205，No.50874071）、上海市重点学科建设项目（S30106）、上海市部分地方院校能力建设项目（12160500200）和上海市高原高峰学科建设项目资助。

Nuclear magnetic resonance visualization experiment of gravity tongue characteristics in the displacement process

Di Qinfeng^1,2, Zhang Jingnan^1,2, Ye Feng^1,2, Wang Wenchang^1,2, Chen Huijuan^1,2, Hua Shuai^1,2

1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai 200072, China;
2. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai 200072, China

Received:2016-07-06 Revised:2017-07-31 Online:2017-10-25 Published:2017-11-02

摘要/Abstract

摘要：

重力舌进是一种岩心驱替实验中常见的由于重力作用导致驱替剂沿岩心上缘或下缘突进的现象，其直接影响驱替剂的应用效果。由于在驱替过程中无法对岩心内部进行直接观察，因此对重力舌进现象没有直观的认识。利用油藏数值模拟方法模拟了重力对水驱油过程中流体流动形态的影响，并利用基于核磁共振成像技术的岩心驱替可视化实验方法研究了重力舌进产生的条件及影响因素，同时提出了一种获得产生重力舌进特征临界密度差的新方法。研究结果表明，驱替流体与被驱替流体的密度差是产生重力舌进现象最直接的原因；当实际的密度差大于临界密度差时，则产生显著的重力舌进现象；驱替介质的黏度和驱替流量对重力舌进特征的影响并不明显；在实际生产过程中，可以根据地层流体性质优选驱替液的密度，减少重力舌进对驱替效果的影响。

关键词: 重力舌进, 核磁共振成像, 临界密度差, 多孔介质, 可视化驱替

Abstract:

Gravity tonguing is a common phenomenon that the displacement agent flows forward rapidly along the upper or lower core edge due to gravity action in the core displacement experiment, which directly affects the effect of displacement agent. For a long term, it is unable to directly observe the core interior in the displacement process, so it is impossible to form an intuitive image of that phenomenon. Firstly, the influence of gravity on fluid flow morphology in the process of water flooding was simulated by means of reservoir numerical simulation. Then, the conditions and influencing factors of gravity tonguing were studied using the core displacement visualization method based on magnetic resonance imaging technique. A new method was proposed to obtain the critical density difference causing gravity tonguing. Research results show that the density difference of displacement fluid and displaced fluid is the most direct reason for gravity tonguing. When the actual density difference is greater than the critical value, significant gravity tonguing will occur. The viscosity and displacement flow of displacement medium have no obvious influence on gravity tonguing. In the actual production process, the density of displacement fluid can be selected preferentially based on formation fluid property to reduce the influence of gravity tonguing on displacement effect.

Key words: gravity tongue, nuclear magnetic resonance imaging, critical density difference, porous media, visualized displacement

中图分类号:

TE312

狄勤丰, 张景楠, 叶峰, 王文昌, 陈会娟, 华帅. 驱替过程中重力舌进特征的核磁共振可视化实验[J]. 石油学报, 2017, 38(10): 1183-1188.

Di Qinfeng, Zhang Jingnan, Ye Feng, Wang Wenchang, Chen Huijuan, Hua Shuai. Nuclear magnetic resonance visualization experiment of gravity tongue characteristics in the displacement process[J]. Acta Petrolei Sinica, 2017, 38(10): 1183-1188.

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驱替过程中重力舌进特征的核磁共振可视化实验

Nuclear magnetic resonance visualization experiment of gravity tongue characteristics in the displacement process

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