柴达木盆地东部航空磁测与第四系气田  

AEROMAGNETIC SURVEY FOR QUATERNARY GAS FIELD IN THE EASTERN PART OF QAIDAM BASIN

作　　者：顾树松 

机构地区：[1]青海石油管理局,甘肃敦煌736202

出　　处：《勘探家（石油与天然气）》1997年第2期43-44,共2页

摘　　要：柴达木盆地东部第四系天然气藏因其埋深浅、地层压实作用较小和固结程度低而导致泥岩盖层具有较好的孔渗透性,这为天然气向上溢散和产生“烟筒效应”提供了有利条件,从而造成气藏上方高频微磁异常的出现。该区地形平缓,为飞机低空飞行取得高精度原始资料提供了保证;区内荒无人烟及寸草不生因而没有人为与植物有机质对磁场的干扰;构造平缓没有断层对气藏破坏等原因,致使“微磁异常”形态基本反应了气藏的分布。上述条件为柴达木盆地东部航磁勘探取得成功的根本原因。The Quaternary gas field is extremely shallow with little compaction and consolidation in the eastern part of the Qaidam Basin, which makes good conditions for natural gas escape upwards and creates frequent micro-magnetic anomaly above the gas reservoir. The smooth topography with unpopulated provides basic background for low altitude aeromagnetic survey. In addition, the micro-magnetic anomaly mainly reflects the scale of the gas reservoir because of smooth structure and no fault activity in the reservoir, This is why aeromagnetic survey obtained good results in the eastern part of Oaidam Basin

关 键 词：柴达木盆地 第四系 气田 航磁勘探 

分 类 号：P618.130.8[天文地球—矿床学]