西藏措勤盆地油气遥感解译

摘要

There is a great potential for petroleum exploration in Cuoqin basin, Tibet. The petroleum interpretation with remote sensing can solve such questions as cold, hypoxia, inconvenient traffic and high cost with conventional methods for petroleum exploration in study area. Surface anomalies are extracted and analyzed with comparative method, fuse method and hydroxyl and iron anomaly method in Cuoqin basin. Based on comparison, hydroxyl and iron anomaly method (main method is principal component method) is the best for remote sensing interpretation because there are few non-petroleum anomalies in interpretation result of principal component method. But there are lots of non-petroleum anomalies in interpretation result of comparative method, the interpretation result is inaccurate. The degree of interpretation accuracy with fuse method falls in between. Four favorable petroleum exploration areas can be put forward in Cuoqin basin through interpretation of remote sensing, and three areas of them coincide with petroleum geology data.%西藏措勤盆地油气勘探潜力大,利用遥感解译方法可以解决研究区高寒缺氧、交通不便以及常规油气勘探方法成本高等问题.利用比值法、遥感波段融合法、羟基/铁质异常提取法对措勤盆地异常信息进行提取和分析,并与油气苗点和己知油气藏对比.结果表明,羟基/铁质异常提取法(主要分析手段是主成分法)包含的非油气异常信息少,异常信息与油气苗点吻合度高,是最佳的解译方法.比值法提取的异常信息中包含较多的非油气异常信息,因此油气解译结果不准确.遥感波段融合法解释准确性介于两者之间.通过遥感解译预测出措勤盆地4个有利油气勘探区域,其中3个与该区石油地质分析结果非常吻合.