The abnormal information extraction of the hydrocarbon micro-seepage based on the hyperspectral image

With the advantages of high spectrum resolution, the study on the accurate and effective extraction of the soil hydrocarbon micro-seepage information based on the hypercpectral data has an extremely extensive application prospect, such as be used as an important basis for carrying on the oil-gas prospect evaluation. Both of hydrocarbon index method and spectrum angle match (SAM) method are adopted in this paper, using the Hyperion data in Ordos Basin and according to the micro-seepage theory. It will determine the following alteration information: hydrocarbon, Fe, carbonate and clay mineral, and also determine the potential abnormal region. The HI method will be used to extract hydrocarbon information nearby 1730nm, and R index method in 2310nm; for the extraction of the Fe, carbonate and clay mineral, this paper applies the SAM method, compares the spectrum in the image with the standard spectrum in the USGS spectral library, charting to get the interpret results.