林甸地区登娄库组层序地层格架与油气前景

Study of Sequence Stratigraphic Framework and Oil Gas Exploration Prospects in the Denlouku Formation of Lindian Area

应用陆相湖盆层序地层学的理论和方法,综合利用地震、测井、岩芯等资料,对松辽盆地北部林甸地区登娄库组三级层序内的最大湖泛面和首次湖泛面进行识别。建立了登娄库组地层格架,并划分为3个体系域。其识别标志为地震、露头、测井等资料上的特征,层序的体系域为LST、TST、HST。在此基础上,研究了登娄库组层序形成的主要控制因素,即构造断裂活动、气候条件、湖平面升降和物源供应。林甸地区登娄库组作为勘探接替层段,具有良好的油气勘探前景。

Using the theories and methods of sequence stratigraphy in lake basins,seismic,logging and drilling core data of the Denlouku Formation in the Lindian area of the Songliao Basin are analyzed in order to understand its sequence stratigraphy.Boundaries and maximum flooding surfaces and established sequence stratigraphic framework of the Denlouku Formation are identified sequence.It can be divided into three systems tracts.Data used in the sequence and systems tract identification include seismic data,outcrop data,and logging data.Systems tracts in sequence include LST,TST,and HST.On this basis,main control factors of Denlouku Formation,namely,tectonic activity,weather conditions are studied,go up and down of lake level and source supplies.Denlouku Formation in the Lindian area has good oil gas exploration prospects as a transitional layer.