油气微渗漏的地表异常表现为: 地表土壤的矿物组分异常和地表土壤的光谱异常, 以中国的榆林地区为研究区, 以在研究区内采集的119个样本的矿物组成及反射率光谱为研究数据, 对油气微渗漏造成的地表蚀变矿物碳酸盐含量与其光谱吸收峰深度、 宽度等特征参数进行了相关分析, 建立并评价了测定碳酸盐含量的方法, 提出了利用碳酸盐含量表征油气微渗漏程度的新方法。 研究结果表明, 该法不仅适于表征碳酸盐类油气微渗漏程度, 也适用于对其他类型的蚀变矿物油气微渗漏程度的研究, 因此可为利用高光谱遥感的光谱信息进行油气勘探的技术研究提供借鉴。

With the Yulin Prefecture in China as the research area and the mineral compositions and reflectance spectra of 119 samples collected in the research area as research data, the present paper analyzes the correlation between the carbonate content of surface altered minerals caused by oil and gas microseepage and such charactersitic parameters of depth, width of its spectral absorption peak, establishes and evaluates a method for determining carbonate content, and proposes a new method for characterizing the degree of oil and gas microseepage by using the carbonate content. Research results show that this method is not only suitable for characterizing the oil and gas microseepage degree of carbonates, but also suitable for studying the oil and gas microseepage degree of other types of altered minerals. Therefore, the method can provide reference for studying oil and gas exploration technology by using spectral information of hyperspectral remote sensing.