松辽临江泉四段层序地层划分及沉积特征

Sequence Stratigraphy Division and Depositional Chrarcteristics of Member 4 of Quantou Formation in Linjiang Area of Songliao Basin

以层序地层学原理为指导,并结合陆相湖盆层序地层特征,应用岩心、测井等资料将松辽盆地临江地区泉四段划分为1个三级层序进而细分为1个低位体系域和1个湖扩体系域,并建立起该区泉四段层序地层格架。在古地貌、物源分析的基础上,提出临江地区泉四段为主要受控于长春-怀德物源的浅水三角洲沉积,分流河道为主要储层类型。在单井相分析的基础上建立了该区测井相模式,最终刻画出相应油层组级别的沉积相图,为后期的勘探开发奠定了坚实的基础。

With the sequence stratigraphy principle as a guide,and combined with continental sequence stratigraphic characteristic,using core and logging data,Member 4 of Quantou Formation in Linjiang area of Songliao basin was divided into 1 third-grade sequences and then subdivided into 1 lowstand systems tract and 1 lake enlarge system tract,and set up sequence stratigraphic framework.Based on ancient geomorphology,the provenance analysis,Member 4 of Quantou Formation is shallow-water delta deposition which was main controlled by Changchun-Huaide provenance,distributary channel is the main reservoir types in Linjiang area.Based on single phase analysis,the log facies pattren is established,finally the corresponding reservoir group levels of sedimentary facies are finished,a solid foundation is laid for the exploration and development for later.