孟思炜, 孙大兴, 俞佳庆, 莫翌, 邵广斌, 薛伟杰, 周德开, 郑立臣. 基于面投影微立体光刻技术的三维模拟储层岩心模型制造[J]. 工程科学学报, 2021, 43(11): 1552-1559. DOI: 10.13374/j.issn2095-9389.2020.06.10.001
引用本文: 孟思炜, 孙大兴, 俞佳庆, 莫翌, 邵广斌, 薛伟杰, 周德开, 郑立臣. 基于面投影微立体光刻技术的三维模拟储层岩心模型制造[J]. 工程科学学报, 2021, 43(11): 1552-1559. DOI: 10.13374/j.issn2095-9389.2020.06.10.001
MENG Si-wei, SUN Da-xing, YU Jia-qing, MO Yi, SHAO Guang-bin, XUE Wei-jie, ZHOU De-kai, ZHENG Li-chen. Fabrication of a three-dimensional simulated reservoir core model based on area projection micro-stereolithography[J]. Chinese Journal of Engineering, 2021, 43(11): 1552-1559. DOI: 10.13374/j.issn2095-9389.2020.06.10.001
Citation: MENG Si-wei, SUN Da-xing, YU Jia-qing, MO Yi, SHAO Guang-bin, XUE Wei-jie, ZHOU De-kai, ZHENG Li-chen. Fabrication of a three-dimensional simulated reservoir core model based on area projection micro-stereolithography[J]. Chinese Journal of Engineering, 2021, 43(11): 1552-1559. DOI: 10.13374/j.issn2095-9389.2020.06.10.001

基于面投影微立体光刻技术的三维模拟储层岩心模型制造

Fabrication of a three-dimensional simulated reservoir core model based on area projection micro-stereolithography

  • 摘要: 首先搭建具有高精度面投影微立体光刻设备,通过理论分析和实验相结合的方法获得最优打印工艺参数,然后提出一种可用于模拟地层岩心的微球堆叠岩心模型,并通过分析岩心模型成型机理,选取具有更高成型精度的堆积方式对岩心模型进行设计。该模拟岩心制造方法具有对特殊岩心结构制造的高适应性,为实验室显微镜下研究多种EOR技术微观驱替机理提供了新思路。

     

    Abstract: Petroleum exploitation plays a very important role in national energy security. With continuous exploitation of oil fields in my country, the efficiency of conventional water injection oil production is decreasing year by year. Enhanced oil recovery (EOR) technologies, such as polymer flooding, microbial flooding, micro–nano flooding, and other flooding technologies have been proposed and developed for application. However, the microscopic displacement mechanism and displacement effect of these technologies are still unclear. Current oil displacement research needs to be verified by core displacement experiments. However, the current displacement experiments all use artificial cores, glass etching channels, photoetched microchannels, etc., as the oil displacement environment. These displacement environments are insufficient in terms of oil displacement dimensions and observation phenomena. Due to this, there is an urgent need for a core manufacturing method that is more suitable for laboratory oil displacement research. In this study, we proposed a method for manufacturing a simulated three-dimensional core structure based on micro-stereolithography technology. This method not only has the advantages of fast manufacturing speed and high forming accuracy, but is also able to realize the visualization, parameterization, and customized design of a micron structure. The core model self-searched by stereo lithography has a three-dimensional pore structure in the order of hundreds of microns and can be used to simulate the experimental study of reservoir displacement flow mechanism. In this research, a high-precision surface projection micro-stereolithography equipment was built, and the optimal printing process parameters were obtained through a combination of theoretical analysis and experiments. Then, a microsphere stacked core model was proposed that can be used to simulate formation cores. By analyzing the forming mechanism of the core model, a stacking method was selected with a higher forming accuracy to design the core model. Finally, the core of a 100-micron-sized microsphere accumulation was realized by micro-stereolithography to achieve three-dimensional molding. The simulated core manufacturing method in this study has high adaptability to special core structure manufacturing and provides a new idea for studying the microscopic displacement mechanism of various EOR technologies under a laboratory microscope.

     

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