基于近红外漫反射光谱的烃源岩生烃潜量的确定
The Evaluation of Hydrocarbon Potential Generation for Source Rocks by Near-Infrared Diffuse Reflection Spectra
查看参考文献14篇
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文摘
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对比了近红外光谱和中红外光谱对烃源岩样品生烃潜量的定量分析能力.由于近红外光谱受样品的颗粒度、密度、表面粗糙度等造成的光散射的影响更大,使得其漫反射光谱数据的信噪比很低,背景干扰很大,很难直接应用于定量分析.因此需要一种有效的方法对近红外漫反射数据进行预处理来消除散射的影响.本文对比了正交信号校正算法(OSC)及其两种改进算法(DOSC和WMDOSC)对原始光谱进行预处理,并结合间隔偏最小二乘(iPLS)建模的结果,发现用WMDOSC作为预处理方法时,近红外光谱所建模型能够达到与中红外一致的准确性,使得近红外漫反射光谱技术在石油录井中有了广阔的应用前景 |
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其他语种文摘
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Near-infrared (NIR) and mid-infrared (MIR) diffuse reflection spectra were compared and evaluated for hydrocarbon potential generation of source rocks. Near-infrared diffuse reflectance often exhibits significant differences in the spectra due to the non-homogeneous distribution of the particles, so the signal-to-noise ratio of NIR is much lower than MIR. It is too difficult to get accurate results by NIR without using a strong spectral preprocessing method to remove systematic noise such as base-line variation and multiplicative scatter effects. In the present paper, orthogonal signal correction (OSC) and an improved algorithm of it, i.e. direct orthogonal signal correction (DOSC), are used as different methods to preprocess both the NIR and MIR spectra of the hydrocarbon source rocks. Another algorithm, wavelet multi-scale direct orthogonal signal correction (WMDOSC), which is a combination of discrete wavelet transform (DWT) and DOSC, is also used as a preprocessing method. Then, the calibration model of hydrocarbon source rocks before and after pretreatment was established by interval partial least square (iPLS). The experimental results show that WMDOSC is more successfully applied to preprocess the NIR spectra data of the hydrocarbon source rocks than other two algorithms, and NIR performed as good as MIR in the analysis of hydrocarbon potential generation of source rocks with WMDOSC-iPLS pretreatment calibration model |
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来源
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光谱学与光谱分析
,2011,31(4):955-959 【核心库】
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DOI
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10.3964/j.issn.1000-0593(2011)04-0955-05
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关键词
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烃源岩
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生烃潜力
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漫反射
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近红外
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地址
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1.
南开大学泰达应用物理学院, 弱光非线性光子学材料先进技术及制备教育部重点实验室, 天津, 300457
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南开大学物理科学学院, 弱光非线性光子学材料先进技术及制备教育部重点实验室, 天津, 300071
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中国石油管道研究中心, 河北, 廊坊, 065000
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山东大学威海分校空间科学与物理学院, 山东, 威海, 264209
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南开大学物理科学学院, 天津, 300071
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0593 |
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学科
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化学 |
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基金
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南开大学新教师科研启动基金项目
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南开大学物理学基地教学基金项目
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南开大学本科生创新科研百项工程基金项目
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中央高校基本科研业务费专项资金
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精密测试及仪器国家重点实验室开放基金资助
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文献收藏号
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CSCD:4153401
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