戈壁荒漠区遥感环形影像异常的油气地球化学特征分析

PETROLEUM GEOCHEMICAL ANALYSIS ON THE CIRCULAR ANOMALY OF REMOTE-SENSING IMAGES IN GOBI REGIONS

金琪祥 谭青 曾华盛 毕兰英 袁玉松

Yu Qixiang Tan Qing Zeng Huasheng Bi Lanying Yuan Yusong

地矿部石油地质综合大队, 荆州, 434100

Comprehensive Party of Petroleum Geology, CNSPC, Jingzhou, Hubei 434100

西北某荒漠区的油气化探和遥感调查综合研究发现:(1)根据遥感图像解释的12个环形影像以色调异常为主.影纹结构异常欢之,其影像特征多为浅黄、桔黄、紫红色调.(2)7号环形影像(R7)及其周缘的化探与地物波谱联测数据因子分析和聚类分析表明,R7实质上是一个烃蚀变异常,1995年位于R7附近的一口参数并打出了工业油气流.(3)统计表明,多数环形影像异常内的C2、C3、C2-、△C、Hg等指标的平均值高干区域背景值.(4)各环与R7(标准环)的秩相似指数分析表明,与R7相似程度最接近的是R8,其次为R9、R3、R4、R1、R6、R12.以上环形影像异常很可能是油气蚀变所致,因此值得重视.

The comprehensive study on the petroleum geochemical exploration and remote-sensing survey of some northwest desert region has suggested that: (1) in the twelve circular images interpreted on the basis of remote-sensing images, hue anomaly is dominant, image texture anomaly takes the second, and the images are characterized by light yellow, orange and purplish red hue; (2) factor and cluster analyses of data from joint determination of geochemical prospecting and object spectrum on the No. 7 circular image(R,) area and the adjacent regions show that R, is actually a anomalous halo produced by the alteration of hy-drocarbons, and a parameter well drilled in 1995 near R7 area produced commercial oil flow F (3) statistics also reveal that the average values of C2,C3,C2-,△C, Hg and other indexes in most circular image anomalies are higher than the regional background value; (4) rank correlatio coefficients indicate that the most similar to R7 is R8, then is R9,R3,R4,R1,R6 and R12, Successively. All the circular image anomalies mentioned above probably result from the alteration of oil and gas, and are worth paying attention to.

https://doi.org/10.11781/sysydz199801068