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微观剩余油形成机理、赋存量以及空间分布是油田评价储层不同开发阶段含油性、提高采收率的重要研究内容,由于微观剩余油尺寸较小,影响因素复杂,需要借助特殊的方法进行研究.本文从微观剩余油研究的手段入手,将微观剩余油研究分为物理实验技术和数值模拟方法,并探讨了各种方法的优缺点.物理实验技术主要包括传统光学技术、扫描电镜技术、激光共聚焦技术、CT技术、核磁共振成像技术;数值模拟方法主要包括基于网格化方法、无网格化方法、孔隙网络方法等.结合国内外研究现状的综合评述,对两类微观剩余油方法进行展望,指出微观剩余油研究对探勘和开发的重要性,认为CT技术、核磁共振成像技术、格子玻尔兹曼方法和孔隙网络方法是未来微观剩余油研究的主要手段.
Micro-residual oil formation mechanism, abundance and spatial distribution are important research contents in oilfield evaluation of oil reservoirs in different development stages and oil recovery. Due to the small size of micro-residual oil and complicated influence factors, special methods are needed This paper starts with the means of microscopic residual oil research and divides the research of microscopic residual oil into physical experiment technique and numerical simulation method and discusses the advantages and disadvantages of various methods.The physical experiment technique mainly includes the traditional optics technique, scanning electron microscopy technique, Laser confocal technique, CT technique and nuclear magnetic resonance imaging technique. The numerical simulation methods mainly include grid-based method, meshless method, pore network method, etc. Combined with the review of the research status at home and abroad, Method, and pointed out the importance of microscopic residual oil research to exploration and development. It is concluded that CT, NMR, lattice Boltzmann method and pore network are the main methods for the study of the remaining microscopic oil in the future.