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摘要
使用陆地卫星ETM+7图像对松辽盆地西部斜坡区进行稠油探测,图像增强方法有主成分分析、波段比值和假彩色合成等.主成分因子1,3,4,5-PC3(1,3,4,5主成分分析的第3主成分),1,3,5,7-PC3,2,3,5,7-PC3和3,4,5,7-PC4与波段比值3/1,4/3,7/5和(4/3)-(2/3)等用丁假彩色合成,在合成影像上圈定烃渗漏蚀变区域.结果表明烃渗漏蚀变区域与地质背景密切相关,与下伏油藏的分布大致相符.
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稠油 烃渗漏 ETM+7 主成分分析(PCA) 波段比值 假彩色合成(FCC)Among the surface sediments anomalies caused by hydrocarbon leakage ofheavy oil reservoir, bleaching of red beds,enrichment of ferrous-iron and alterations of clay minerals and carbonates exhibit diagnostic spectral features. For heavy oil exploration in thewestern slope of Songliao Basin, ETM+7image is used to identify anomaly caused by hydrocarbon leakage.PrincipalComponentAnalysis (PCA), band ratio, and False Color Composition (FCC) are used in image process. Fourprincipal components (PCs) including1,3,4,5-PC3(the third componentof thePCA on band1,3,4and5),1,3,5,7-PC3,2,3,5,7-PC3 and3,4,5,7-PC4show steady spectralenhancementfor thehydrocarbon-inducedminerals. ThePCs are combinedwithband ratiosof 3/1,4/3and7/5forFCC.FourFCC images are selected for hydrocarbon-induced area delineation. Result indicates that the identified anomalous area is related to the geological setting and consistentwith the strata sections inmostarea.
