摘要
本文对陇东黄土高原油气田内外在遥感图像上大量存在的、不同类型环形影像的性质作了研究。对研究区南段6个不同色调类型的环形影像的地表环内、外土壤样品与油气相关的地球化学指标分析结果表明:(1)图像上的色调环均为地球化学晕的反映;(2)包含已知油井的Y-I环是油气晕的显示。该环的地球化学数据与地表土壤的光谱数据之间存在相关性。通过TM CCT亮度值分析发现,Y-I油气晕环内与环外之间亮度均值的变化是有规律的,经方差分析环内、外的差异均较显著。为验证Y-I环亮度变化规律的普遍意义,在自然地理条件稍有变化的研究区北部地区,选择了一个包含已知油井的色调环、一个包含已知无油井的色调环、一个包含仅有油气显示的色调环和一个已知含油区,进行了亮度变化规律的对比,从而建立了黄土地区判断遥感图像油气晕的模式。即:(1)在TM 4(R),TM5(G)和TM7(B)的彩色合成图像上,环内红色调,环外有蓝斑的色调环,可能是油气晕环;(2)该色调环CCT磁带的亮度均值为,TM1—7及TM5/7环内小于环外;(3)除TM4不稳定外,一般环内、外的差异均较显著。
In this paper various types of ring-like images have been studied systematically, which appear on remote sensing imagery, locate on outer and inner the oil-gas field of the loess plateau on the east part of Gansu province, Among them six different types of tonal ring-like images. on the south region of the study area were chosen and the related soil geochemical data from outer and inner the six tonal ring-like images have been analyzed. The results show that: (1) All of the tonal ring-like images on the imageries come from geochemical haloes. (2) The Y-1 ring covering a known oil-gas well is a oil-gas halo ring with a significant relationship between geochemical data and ground soil spectral response. By analyzing the tape lightness of the ring images, the regular variations of the lightness mean values between inner and outer the oil-gas halo rings have been discovered. One of them is the significant difference proved by the variance analysis. In order to identify the general applying significance of the Y-1 ring lightness varying regulations, another tonal ring covering a productive oil-gas well, a tonal ring-covering no oil-gas well, a tonal ring covering a nonsignificant productive oil-gas well and a known oil-gas region, which are located on north part of the study area that shows a slightly different in geographic conditions from the Y-l ring area, have been compared between each other for their lightness variation regulations. The researches are resulted in the following model for estimating oil-gas haloes from the remote sensing imagery:(1) On the colour composite imageries from the TM4(R), TM5(G) and TM7(B), the tonal ring-like image red tone on the inner ring and blue tone on the outer ring are suggested to be oil-gas halo ring.(2) The CCT tape lightness mean values of the outer rings are almost higher than that of the inner rings in the TM1-7 and TM5/7.(3) Except the TM4, the lightness mean values of all the TM bands give significant differences between inner and outer rings.
出处
《环境遥感》
CSCD
1992年第1期59-64,共6页
关键词
石油
天然气
油气晕
遥感
图像
Remote sensing Oil-gas halo Geochemistry
