高精度磁测在伊川盆地油气勘探中的应用

High-precision magnetic survey applied to hydrocarbon exploration in Yichuan Basin

中国地质大学,武汉430074

China University of Geosciences, Wuhan 430074

文中分析了伊川盆地的磁性界面, 阐述了磁异常的特征。综合分析地质、磁异常资料后认为, 盆地东南部的杂乱磁异常为橄榄玄武岩所引起；在磁性界面反演基础上划分了盆地基底构造单元, 指出了鸦岭一伊川低凸起是盆地内寻找油气最为有利的地带。

This paper analyzes the magnetic interface and the character of magnetic anomaly inthe Yichuan Basin. Through the comprehensive analysis of geologic and magnetic data, it isthought that the stray magnetic anomaly in the southeastern basin is caused by olivine basalt. Onthe basis of magnetic interface inversion results, we divide the basement structure unit, and pointout that the Yalin-Yichuan low embossment is one of the most promising area in this basin.