摘要
油气藏微渗漏使上覆土壤产生“蚀变”，在地表形成油气晕。它在遥感图像上呈环形影像显示。由于环形影像成因的多样性，并非环形影像即油气晕。在油气晕地表土壤的光谱特征及其在ＴＭ图像上的亮度特征分析的基础上，建立油气晕遥感识别模式。该模式为：油气晕在遥感图像上以色调环形式表示，它的环外ＴＭ１─５和ＴＭ７各波段的均值大于环内。该模式得到两个含油气盆地的几个已知油气环的验证。）。
It is known that if there are oil gas reserve underground,top soil can be altered by themicro-seepage of oil-gas． As a result of the soil altered，the oil-gas halo is formed on ground.They are often characterized on Landsat remote sensing image as the form of annular feature. But the problem is that not all the anular features denote oil-gas anolmlies． On the basis ofthe characteristics analysis of spectral reflectance of oil-gas halo surface soil and brightnesslevel of oil-gas ring on TM image，the recognition model to oil-gas halo is developed．It is giv-en below.The oil-gas halo appears as the tone annular feature on TM image. And the brightnessmean of inner the ring are less then outer in Tml-5 and TM7 bands. This recognition model have been tested and verified by a few known oil-gas rings onTM image in two reserve oil-gas basins.
出处
《河南科学》
1995年第3期239-244,共6页
Henan Science
