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3D打印被誉为工业制造2025的一项关键技术,已在高强度钢材、高温合金、塑料橡胶上取得不同程度的工业化应用,也是当前发展热点。然而,3D打印在石油岩芯领域仍然存在较多技术难点,例如岩芯的高获得成本及较低的重复一致性等均是制约其进一步发展的关键因素。本文首次尝试从3D打印材料组合出发,通过类材料的方法展开研究。首先通过对几种常用类岩石类材料及页岩粉的性质分析,成功选择出了一种适用于3D打印的岩芯材料组合。结合响应面法进一步分析了不同配比对类岩石类材料渗透率、孔隙度和凝结时间的影响。最后结合中心组合设计(CCD)对模型进行优化,成功得到最佳的配方配比方案,并与真实数据进行比较,结果显示拟合效果较好。
3D printing has been hailed as one of the key technologies in industrial manufacturing 2025. It has obtained varying degrees of industrial application in high-strength steel, high-temperature alloy and plastic rubber, and is also the current development hotspot. However, 3D printing still has many technical difficulties in the field of petroleum core. For example, the high acquisition cost of core and the low repetition consistency are the key factors that restrict its further development. This article first attempts to start from the 3D printed material combinations, through the method of class materials research. First of all, by analyzing the properties of several commonly used rock-like materials and shale powders, a core material combination suitable for 3D printing was successfully selected. The response surface method was used to further analyze the effects of different ratios on the permeability, porosity and setting time of rock-like materials. Finally, the model was optimized by CCDC, and the best formula was obtained. Compared with the real data, the result shows that the fitting result is better.