乌尔禾地区油砂光谱特征及其与烷烃含量的关系

发布时间：2018-01-09 14:26

本文关键词：乌尔禾地区油砂光谱特征及其与烷烃含量的关系　出处：《新疆石油地质》2017年01期 　论文类型：期刊论文

【摘要】：通过对准噶尔盆地乌尔禾地区典型油气渗漏区地物光谱测量和化学分析测试,讨论油气渗漏引起的地物异常光谱特征及其与烷烃含量的关系。结果表明,不同烷烃含量的宏观渗漏异常光谱在2 310—2 350 nm的"W"型双吸收峰较稳定,在1 725 nm和1 760 nm附近的单吸收峰变化较大;微观渗漏异常由于烃类含量较少,其光谱在烃类吸收波段的吸收特征不明显,但岩石薄片和光谱显示黏土化蚀变明显。乌尔禾地区油气渗漏引起的黏土化主要为蒙脱石化和伊利石化,通过对不同程度油气渗漏引起的黏土化光谱测量和观察,发现强油气渗漏引起的黏土化光谱在2 210 nm附近的羟基吸收峰深度大,弱油气渗漏引起的黏土化光谱在2 210 nm附近的吸收峰深度较小,此吸收峰深度可间接反映油气渗漏的强弱。通过对油砂光谱在2 310 nm附近的吸收峰("W"型双吸收峰的左侧峰)宽度、深度、面积、对称度等参数统计和饱和烃色谱质谱分析,发现吸收峰深度与油砂中烷烃含量呈明显的线性关系,通过拟合的线性表达式,可用吸收峰深度参数估算烷烃的含量,为区域油气探测提供参考。
[Abstract]:Based on the spectral measurement and chemical analysis of the typical oil and gas leakage area in Wuerhe area, Junggar Basin, the spectral characteristics of abnormal surface objects caused by oil and gas leakage and their relationship with alkane content are discussed. The macroscopic leakage anomaly spectrum of different alkane content is stable at 2310-2 350 nm "W" type double absorption peak. The single absorption peaks at 1 725 nm and 1 760 nm vary greatly. The absorption characteristics of microcosmic leakage anomaly in hydrocarbon absorption band are not obvious due to the low hydrocarbon content. However, the thickness and spectrum of the rock show that the clay alteration is obvious. The clay caused by oil and gas leakage in Wuerhe area is mainly montmorillonite and Illite. Through the measurement and observation of clay spectrum caused by different degrees of oil and gas leakage, it is found that the depth of hydroxyl absorption peak of the clay spectrum caused by strong oil and gas leakage is high near 2 210 nm. The depth of absorption peak of clay spectrum caused by weak oil and gas leakage is small near 2210 nm. The depth of the absorption peak can indirectly reflect the degree of oil and gas leakage. The width, depth and area of the absorption peak (left peak of "W" type double absorption peak) near 2310 nm are measured. According to the statistics of symmetry and saturated hydrocarbon chromatography-mass spectrometry, it is found that the absorption peak depth is linearly related to the alkane content in oil sands, and the fitting linear expression is obtained. The depth parameter of absorption peak can be used to estimate the content of alkanes, which provides a reference for regional oil and gas exploration.
【作者单位】：核工业北京地质研究院遥感信息与图像分析技术国家级重点实验室;中国地质大学地球科学与资源学院;
【基金】：中国地质调查局油气战略选区项目(1211302108019-1)
【分类号】：P618.13
【正文快照】： 遥感技术应用于油气勘探领域,早期是运用卫星遥感数据进行解译,通过分析遥感影像特征,判别有利的油气构造,从而间接寻找油气[1-2]。随着高光谱遥感技术的发展和烃类渗漏理论的提出,越来越多的学者开始利用遥感技术直接探测油气藏[3-11]。油气渗漏现象分为宏观渗漏和微观渗漏,

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