松辽盆地南部有机包裹体特征及石油地质意义

CHARACTERISTICS OF ORGANIC INCLUSIONS IN SOUTHERN SONGLIAO BASIN AND THEIR SIGNIFICANCE FOR PETROLEUM GEOLOGY

松辽盆地南部十屋断陷泥岩裂隙方解石脉有机包裹体均一温度分为９７．６℃、１０６℃、１２２．５℃、１６８．８℃四组，反映了四期以上微裂隙的排烃过程。断陷盆地储层中包裹体发育，以气相为主，十厘、伏龙泉断陷有一定量的石油包裹体，十屋断陷包裹体均一温度分７０～８０℃、９０～１１０℃、１２０～１４０℃三组，反映了三期油气运聚过程。伏龙泉断陷与十屋断陷相似。柳条断陷以１２０～１４０℃为主，油气运聚期次少。包裹体的丰度、类型分布说明，十屋断陷油气运聚作用活跃，以侧向运移为主，有较好的油气勘探前景。伏龙泉断陷次之，以垂向运移为主。其它断陷油气运聚作用相对较弱，以垂向运移为主，有较大的天然气勘探前景。

The measured monogenetic temperatures of organic inclusions in the fissures of mudstones in Shiwu Faulted Depression,Southern Songliao Basin Were 97.6℃,106℃ 122℃and 168.8℃ respectively.This indicates that at least four periods of hydrocarbon expulsion took place.The reservoirs in the fault-depressde basin contain rich inclusions which are mainly in gas phase.But certain amount of oil inclusions could be found in Shiwu and Fulongquan Faulted Depressions.The monogenetic temperatures of the inclusions in the Shiwu Faulted Depression Were 70-80℃,90-110℃ and 120-140℃,which reflected three hydrocarbon migration and accumulation stages.The characteristics of the inclusions of Shiwu and Fulonguan Faulted Depressions Were similar. Liutiao Faulted Depression, hower, had fewer periods of hydrocarbon migration and accumulation, the monogenerous temperatures wre primarily 120-140℃.The abundance,type and distribution of organic inclusions of different depressions suggest that Shiwu Faulted Depression is active in hydrocarbon migration and accumulation and has good oil and gas prospects,lateral migration is its major migration manner;Fulouguan Fanulted Depression is secondary in hydrocarbon migration and accumulation,with vertical migration as its main manner;hydrocarbon migration and accumulation of other depressions are relatively weak but possess good gas exploration prospects.