利用CT图像与压汞核磁共振构建高精度三维数字岩心

发布时间：2018-03-16 10:33

  本文选题：岩石物理实验　切入点：CT扫描　出处：《测井技术》2016年04期 　论文类型：期刊论文

【摘要】：X射线CT扫描作为岩心孔隙结构研究的主要手段之一,遇到的最主要的难题是微米CT无法识别微孔隙。纳米CT能够反映岩心微孔隙的信息,在一定程度上弥补微米CT扫描的不足。纳米CT扫描岩样的尺寸很小,即使对于均质性较好的岩心,选取岩样时的位置不同,得到的岩心参数也会有所差异,对于非均质性强的岩心,结果差异会更大。针对该问题提出利用CT扫描图像与压汞核磁共振资料结合构建高精度三维数字岩心的方法。相比于微米扫描得到的数字岩心,该方法获取的数字岩心在孔隙度和渗透率上都有较大提升,与实验结果更为接近,为在取心难、实验难的碳酸盐岩、页岩储层开展数字岩石物理实验奠定了基础。
[Abstract]:As one of the main methods in the study of core pore structure, X-ray CT scan is one of the most difficult problems that micron CT can not identify micropores, and nano-CT can reflect the information of core micropores. To a certain extent, it can make up for the shortage of micron CT scanning. The size of rock samples scanned by nano-CT is very small. Even for the cores with good homogeneity, the core parameters will be different when the samples are selected in different positions. For the core with strong heterogeneity, the result will be more different. To solve this problem, a method of constructing 3D digital core with high accuracy by combining CT scanning image with mercury injection nuclear magnetic resonance data is proposed. Compared with the digital core obtained by micron scanning, The digital core obtained by this method has a great increase in porosity and permeability, which is closer to the experimental results, which lays a foundation for the digital rock physical experiments in carbonate rocks and shale reservoirs, which are difficult to coring and testing.
【作者单位】： 中国石油集团测井有限公司;中国石油天然气集团测井重点实验室;中国石油大学(华东)地球科学与技术学院;西安石油大学;
【基金】：中国石油集团公司重大科技项目(2014A-3911) 中国石油股份公司重大科技专项(2014E-3205)
【分类号】：TE31
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本文编号：1619541