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

孟思炜; 孙大兴; 俞佳庆; 莫翌; 邵广斌; 薛伟杰; 周德开; 郑立臣

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

doi: 10.13374/j.issn2095-9389.2020.06.10.001

1.
中国石油勘探开发研究院，北京 100083
2.
哈尔滨工业大学机器人技术与系统国家重点研究室，哈尔滨 150000

基金项目: 中国石油集团科学技术研究院有限公司科学研究与技术开发资助项目(2017ycq17)；国家重点研发计划政府间国际科技创新合作重点资助专项(2018YFE0196000)；国家自然科学基金青年科学基金资助项目(51905135)；广东省重点研发计划资助项目(2020B090923003)

详细信息

通讯作者:
E-mail：zhenglichen@petrochina.com.cn

中图分类号: TE355
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出版历程
- 收稿日期: 2020-06-10
- 网络出版日期: 2020-12-31

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

1.
PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China
2.
State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150000, China

More Information

Corresponding author: E-mail: zhenglichen@petrochina.com.cn

摘要

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。
- 石油开采 /
- 三次采油技术 /
- 微立体光刻 /
- 三维岩心模型 /
- 微球堆叠岩心模型
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.
- petroleum exploitation /
- enhanced oil recovery technology /
- micro-stereolithography /
- three-dimensional core model /
- microspherical accumulation core model

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图 1 微立体光刻设备

Figure 1. Micro-stereolithography system

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图 2 复杂空间网状结构打印效果图

Figure 2. Print effect diagram of a complex space mesh structure

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图 3 岩心SEM图像

Figure 3. SEM image of the core of rock

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图 4 岩石颗粒的简化建模型

Figure 4. Simplified modeling of rock particles

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图 5 微球堆叠方式

Figure 5. Microsphere stacking method

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图 6 简单立方堆积的岩心模型

Figure 6. Simple cubic stacked core model

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图 7 岩心模型基本单元

Figure 7. Basic unit of the core model

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图 8 非均质岩心制造效果

Figure 8. Manufacturing effect of the heterogeneous core

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图 9 微立体光刻岩心制造效果

Figure 9. Manufacturing effect of the micro-stereolithography core

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图 10 逐层打印效果

Figure 10. Layer-by-layer printing effect

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图 11 岩心缺陷结构

Figure 11. Core defect structure

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图 12 岩心微球成型精度表征

Figure 12. Characterization of core microsphere forming accuracy

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图 13 不同材料的微球堆叠岩心模型成型效果. （a）zDental Model沙黄树脂成型岩心;（b）自配制树脂体系成型岩心

Figure 13. Forming effect of the core model of microsphere accumulation by different materials: (a) the core of zDental Model sand yellow resin molding; (b) self-prepared resin system forming core

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