利用烃蚀变带所产生的磁异常现象，在平面上圈定油气渗漏的分布范围，进而寻找海底油气藏。
According to the magnetic anomaly from Hydrocarbon alteration zone, the distribution of oil gas seepage can be determined at plane.
海底自然烃渗漏在海洋表面形成的油膜分布对海上油气勘探具有重要指示意义。
The distribution of natural marine hydrocarbon seepage has great significance for the early stage offshore petroleum exploration.
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