| 高效无损岩心孔隙度精确测量新方法 |
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| 引用本文： | 贾宁洪,吕伟峰,常天全,李彤,杨济如,马德胜,程林松,刘庆杰,杨胜建.高效无损岩心孔隙度精确测量新方法[J].石油学报,2018,39(7):824-828,844. |
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| 作者姓名： | 贾宁洪 吕伟峰 常天全 李彤 杨济如 马德胜 程林松 刘庆杰 杨胜建 |
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| 作者单位： | 1. 中国石油大学石油工程学院 北京 102249;
2. 中国石油勘探开发研究院提高石油采收率国家重点实验室 北京 100083;
3. 南京大学化学化工学院 江苏南京 210046;
4. 中国石油新疆油田公司勘探开发研究院 新疆克拉玛依 834000 |
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| 基金项目： | 国家科技重大专项（2016ZX05046-003，2017ZX05070-002）资助。 |
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| 摘 要： | 将微纳米CT图像与微图像拼接技术相结合，识别出干酪根内微纳米尺度孔隙，从而对岩心孔隙度进行精确测量。首先利用微纳米CT图像，识别出其中的宏观连通孔隙度、孤立孔隙度以及干酪根区域（无法辨识的干酪根孔隙）所占体积百分比；然后借助扫描电镜或FIBSEM图像，对微纳米CT图像中的干酪根区域进行超高分辨率成像，识别出干酪根孔隙空间，并通过九格法测量有代表性的样品点计算出干酪根本身的平均孔隙度；最后将超高分辨率下得到的干酪根孔隙度信息，返回到微纳米CT图像中的干酪根区域内，修正微纳米CT图像宏观总孔隙度。整个测量过程操作简便，并且不对岩心造成实质性伤害。
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| 关 键 词： | 微纳米CT图像 岩心 干酪根 孔隙度 微图像拼接 |
| 收稿时间： | 2017-07-20 |
| 修稿时间： | 2018-03-21 |
A new method for precisely measuring core porosity with high efficiency and no destruction |
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| Jia Ninghong,L&#,Weifeng,Chang Tianquan,Li Tong,Yang Jiru,Ma Desheng,Cheng Linsong,Liu Qingjie,Yang Shengjian.A new method for precisely measuring core porosity with high efficiency and no destruction[J].Acta Petrolei Sinica,2018,39(7):824-828,844. |
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| Authors: | Jia Ninghong L&# Weifeng Chang Tianquan Li Tong Yang Jiru Ma Desheng Cheng Linsong Liu Qingjie Yang Shengjian |
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| Affiliation: | 1. College of Petroleum Engineering, China University of Petroleum, Beijing 102249, China;
2. State Key Laboratory of Enhanced Oil Recovery, PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
3. School of Chemistry and Chemical Engineering, Nanjing University, Jiangsu Nanjing 210046, China;
4. Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Xinjiang Karamay 834000, China |
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| Abstract: | Comprehensively using micro-nano CT imaging technology and micro-image mosaic technology, the micro-nano pores in the kerogen are identified to precisely measure core porosity. Firstly, the micro-nano CT images are used to identify the macroscopic connected porosity, isolated porosity and the volumetric fraction of kerogen area (but unable to identify kerogen pores). Then, using SEM or FIBSEM images, the ultra-high resolution imaging is conducted to the kerogen area in the micro-nano CT images, so as to identify the pore space of kerogen. Meanwhile, nine-cell method is used to measure the representative sample points for calculating the mean porosity of kerogen. Finally, the kerogen porosity information obtained under the ultra-high resolution is sent back to the kerogen area in the micro-nano CT image, so as to correct the total macroscopic porosity of micro-nano CT image. This measurement is convenient for operation with no substantial destruction to cores. |
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| Keywords: | micro-nano CT image core kerogen porosity micro-image mosaic |
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