摘要
近年来 ,松辽盆地在下白垩统及以下层系发现并探明九个深层油气田。盆地背部大庆油区有三个气田 ,盆地南部吉林油区有四个气田、两个油田。该盆地深层以气藏为主 ,油藏为辅 ,盆地北部为气藏 ,南部为油藏。油气藏这种分布现象的出现 ,是盆地深层断陷发育多套新的有利于生气的腐殖型烃源岩 ,在高地温的作用下 ,当达到高成熟或过成熟的生烃阶段时 ,其生成和聚集的烃类气体则以热解气和裂解气为主 ,石油为辅。
Nine deepseated oilgas fields are discovered and proved in lower Cretaceous and the under series of strata of Songliao basin in recent years. There are three gas fields of Daqing petroliferous province at the back of the basin. There are four gas fields and two oil fields of Jilin petroliferous province at the south of the basin. The deepseated formations of the basin develop gas fields mainly with less oil field. Gas reservoirs distribute in the north of the basin, thus oil reservoirs distribute in the south of the basin. The distribution rule results from several sets of new humictype hydrocarbon source rocks available to gas generation developed in deep fault depression of the basin. Hydrocarbon gas generated and accumulated by the source rocks is pyrolysis gas and cracked gas mainly with less petroleum at high geotemperature during highly mature or overmature hydrocarbongenerating stage. Forming conditions of the hydrocarbon reservoirs and origin mechanism of the natural gas reservoir are discussed in this paper.
出处
《油气地质与采收率》
CAS
CSCD
2004年第3期31-33,共3页
Petroleum Geology and Recovery Efficiency
关键词
松辽盆地
油气藏
烃源岩
分布规律
裂解气
含油气盆地
hydrocarbon reservoir, distribution rule, hydrocarbon source rock, origin mechanism, petroleum basin
