松辽盆地南部深层火山岩气藏分布及成藏模式

Distribution and forming pattern of deep volcanic gas reservoirs in the south of Songliao Basin

松辽盆地南部深层火山岩气藏已经逐渐成为油气储量的重要增长点。由于勘探程度较低,火山岩气藏的分布及模式研究还不够深入,在一定程度上制约了勘探的成效。在深入分析已发现油气藏的平面分布和纵向分布特征的基础上,总结了分区带东、中、西3个断陷带的成藏模式。在深化地质认识的基础上,总结火山岩气藏的分布,概括不同区带的火山岩气藏的成藏模式,进而指明火山岩气藏的勘探思路,为进一步落实一批大中型火山岩气藏提供依据。

Deep volcanic gas reservoirs have become an important growth point of oil and gas reserves in the south of Songliao Basin.The study on distribution and forming pattern of volcanic gas reservoirs is not thorough enough due to low degree of exploration.Based on in-depth analysis of the horizontal and vertical distribution characteristics of the reservoirs already discovered,three reservoir forming patterns are summarized for the east,central and west fault depressed zones.Based on deep geological understanding,the distribution and forming patterns of volcanic gas reservoirs are generalized to provide a thought for volcanic gas reservoir exploration.