【摘要】 松辽盆地南部海坨子—大布苏地区青三段地层发育几套厚层砂体,通过合成记录标定及地震属性分析,表明该套厚层砂体具有长、直、窄的条带型沉积特征。对其成因许多学者提出多种假设,如:风成、潮汐、河流、滑塌等,但是所有的假设都不能很好解释此种砂体分布特征。研究认为海坨子—大布苏地区位于坡折带之上,地形落差大,水流下切作用强,对下伏地层造成侵蚀,形成深而窄的湖缘峡谷。湖缘峡谷控制砂体的沉积,该砂体在上倾方向上与断层有机配置可形成断层-岩性油气藏。更多还原

【Abstract】 Based on the synthetic seismogram calibration and seismic attribute analysis,a series of thick sand bodies developed in the third member of Qingshankou Formation in Haituozi-Dabusu area,southern SongLiao Basin were characterized by banded sedimentary characteristics of long,straight and narrow shape.There are some assumptions for their genesis proposed by many scholars,such as aeolation,tide,fluviation and slump,but none of them could interpret the distribution features accurately.This result showed that Haituozi-Dabusu area is located in slope break belt,with large terrain drop height and intense fluent vertical erosion,which caused erosion to the substratum,then formed the deep and narrow lake rim canyons which control the deposit of the sand bodies and result in the banded sedimentary characteristics.The combining of the sand bodies and faults in updip direction could possibly form fault-lithologic reservoirs.更多还原