摘要
文本通过对含油气构造航磁异常的分析,按地质成因将其分成三类:火山岩构造异常;基岩断块异常;沉积层背斜异常。文章结合大量实例分别对其作了详细的论述。当然,只有在具备一定地质及地球物理前题的地区,通过区域地质构造条件的分析,并结合地震、重力及放射性等物探资料进行综合对比解释,才能用航磁直接发现含油气局部构造。
Abstract
Through analyzing aeromagnetic anomalies relating to oil/gas traps, according to their geological origins, we might classify them into three types of strueture involved anomalies. The first class of them is related to volcanic layers. The second one is related to the uplifted blocks of bed rock, Whereas the third is related to sedimentary anticlines,Moreover, a large number of examples in this connection are given. And a minute description to each of them is also given respectively in the paper.The author has pointed out that not all of the local structures and oil/gas traps may have affirmative response in aeromagnetic maps. So only in case of bearing some of the following geological and geophysical prerequisites, can we find the oil/gas bearing local structures directly from aeromagnetics. The recommended measures ought to be taken include: to analyze the areal geological structural conditions and then to make an integrated Interpretation in the light of the geophysical information related such as seismic, gravitational, radioactive etc.
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