【摘要】 廊固凹陷已进入“成熟”盆地勘探阶段,为进一步拓展油气勘探的新领域,利用层序地层学理论对凹陷进行整体研究,并为隐蔽油气藏勘探打下铺垫。综合对地震、岩心、测井及古生物等资料的分析,将凹陷下第三系划分为三个二级层序,11个三级层序。断陷盆地,二级层序发育的主控因素是构造沉降,构造沉降和气候控制了三级层序的发育。三级层序SQ1-SQ3发育时期为断陷初始期,SQ4-SQ7为强烈断陷期,SQ8-SQ11为断陷回返及消亡期。更多还原

【Abstract】 Langgu depression has been to a mature period of basin exploration.In order to expand new region of oil exploration,sequence stratigraphy are used to study the depression and forecast oil exploration.Lower tertiary strata of Langgu depression are divided into 3 second-order sequences and 11 third-order sequences after data analysis of seismology,lithology,well logging,paleontology etc..Structure evolution dominated the evolvement of sequence-filling succession and structural activity controlled supersequence.Structural activity and weather controlled three order sequences.SQ1-SQ3 deposited at the beginning time of rifting.When depression rift intensely,SQ4-SQ7 deposited.SQ8-SQ11 deposited at the disappearing time of rifting.更多还原