驱替过程中重力舌进特征的核磁共振可视化实验

发布时间：2018-01-13 16:38

本文关键词：驱替过程中重力舌进特征的核磁共振可视化实验　出处：《石油学报》2017年10期 　论文类型：期刊论文

【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。
[Abstract]:Gravity tongue is a core displacement experiment in common due to gravity caused flooding along the upper edge or the lower edge of the core into the phenomenon, which directly influences the application effect of flooding agent. Due to the flooding process cannot be directly observed on the internal core, so the gravity tongue phenomenon is not intuitive understanding. Numerical simulation method in the process of oil displacement effect of gravity fluid flow pattern of water was simulated by reservoir, and the use of factors for the visualization experiments of gravity tongue nuclear magnetic resonance imaging technology based on core flooding conditions and effects, and proposes a new method for generating gravity tongue features critical density difference the research results show that the displacement fluid and displaced fluid density difference is the cause of gravity tongue phenomenon is the most direct; when the actual density difference is larger than the critical density difference, is significant The effect of gravity tongue penetration, viscosity and displacement flow of flooding media on the characteristics of gravity tongue is not obvious; in actual production process, density of displacement fluid can be selected according to the nature of formation fluid, and the effect of gravity tongue entry on displacement effect can be reduced.

【作者单位】：上海大学上海市应用数学和力学研究所;上海市力学在能源工程中的应用重点实验室;
【基金】：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) 上海市高原高峰学科建设项目资助
【分类号】：TE311
【正文快照】： 引用: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.Cite:DI Qinfeng,ZHANG Jingnan,YE Feng,WANG Wenchang,CHEN Huijuan,HUA Shuai.Nuclear magnetic resonance visualiza-tion experiment of gra

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