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裂缝信息对于低渗透储层的勘探开发具有重要意义。本文在深入探讨利用古地磁方法进行岩心裂缝重定向原理的基础上,详细介绍了岩心裂缝重定向的工作方法。针对垂直及平行于岩心中心轴的两种样品加工方式,推导出可直接利用退磁结果表达的裂缝方向的公式,并将这一结果应用于鄂尔多斯盆地一口有裂缝井的岩心,取得较好的应用效果。研究结果表明,利用古地磁方法进行岩心裂缝重定向具有操作简便、成本较低、且精度相对较高的特点。本文研究结果对于鄂尔多斯盆地的裂缝系统研究具有参考意义。
Crack information is of great significance for the exploration and development of low permeability reservoirs. Based on the in-depth discussion of the principle of using the paleomagnetic method to redirect the core fracture, this paper introduces in detail the working method of the core fracture redirection. Aiming at the two sample processing modes perpendicular to and parallel to the central axis of the core, the formula of the fracture direction which can be directly expressed by the demagnetization results is deduced, and the result is applied to the core of a fractured well in the Ordos Basin. effect. The results show that the use of paleomagnetic methods for core fracture redirection has the advantages of simple operation, low cost and relatively high accuracy. The results of this paper have reference significance for the study of the fracture system in the Ordos Basin.