高精度重磁测量弱信号分析及其在塔北雅克拉地区的应用

The weak signal analysis in precision gravity-magnetic survey and its application in Yakela area,North Tarim

1. 中国地质大学, 武汉430074;2. 地矿部西北石油地质局, 830011

China University of Geosciences (Wuhan), Wuhan 430074

本文讨论1:5万高精度重磁测量在塔北油气勘探中的应用。由于深部区域背景的影响,用常规的数据处理方法得不到反映油气构造的信息,采用T²－Hotelling检验、异常宽度幅值特征滤波等新方法,在强干扰背景下提取与油气有关的构造信息,探讨直接找油的问题,获得良好的地质效果。

In this paper we discuss the application of 1/50000 precision gravity-magnetic survey for oiland gas in North Tarim. The information of reservoir constructions can not be obtaincd withconventional processing methods because of the influence of deep regional background. But we haveabstracted the information of rescrvoir constructions under powerful interference background withthe methods of T²-Hotelling detection,anomaly width filter and anomaly amplitudc filter. On topof this we discuss the problems involved in direct prediction of oil. Good geologic results have comealong with our efforts.