松辽盆地无机成因气富集规律研究

文章通过松辽盆地无机成因气类型、分布规律及成藏特征研究，认为松辽盆地无机成因气的富集主要受两方面因素控制：即热流底辟体、壳内岩浆房、火山岩和区域深大断裂制约着无机气分布区；无机成因气主要分布在莫霍面埋藏较浅部位，并与深大断裂、壳内岩浆房、火山岩和热异常相伴产出。松辽盆地共有4期无机气释放时期：即断陷期、坳陷期、构造反转期及新生代释放期，后3期为主要成藏时期，具有晚期成藏的特征；火山岩圈闭和气源断层控制的位于区域性盖层之下的圈闭为无机气聚集的有利目标区。

STUDY ON THE ENRICHMENT LAWS OF ABIOGENETIC GAS IN SONGLIAO BASIN

Through studying the abiogenetic gas types, distribution patterns and reservoiring characteristics in Songliao Basin, it is considered that the enrichment of abiogenetic gas in the basin is controlled by two factors: the hest flow piercement, magma house in crust, volcano rock and the deep fault dominated the distribution areas; abiogenetic gas mainly distributed in the shallow part of Mohorovicic discontinuity and generated with the deep fault, magma house in crust, volcano rock and the thermal anomaly. Songliao Basin has 4 periods of releasing abiogenetic gas, i.e. fault period, depression period, structural reverse period and Cenozoic release period. The last 3 are the main reservoiring periods and have later period reservoiring characteristics. Volcano traps and the structural traps dominated by gas source fault under the territorial caprock are the favorable target areas. (Financed by the 973 Program project, No. 2001CB20914)