【摘要】 松辽盆地泉四段扶余油层发育浅水湖泊三角洲相和浅水湖泊相,沉积构造环境属于闭塞浅水坳陷湖盆,其层序特征类似于稳定克拉通盆地层序,也类似于缓坡被动大陆边缘型盆地层序,气候是控制陆相坳陷盆地层序形成的主要因素,三级层序内总体应表现为水进体系域-高位体系域构成1个完整的层序,而低位体系域不发育。通过岩心、录井、地震等资料研究分析,认为泉四段扶余油层是1个三级层序,发育水进体系域和顶部薄层强制水退边缘体系域;泉四段与泉三段地层分界是其层序的底界;泉四段顶界地震反射层T2也是层序边界,是泉四段三级层序的顶界。精确识别和建立地层层序格架对石油勘探开发具有重要的指导意义。更多还原

【Abstract】 Quan 4th member of the Fuyang oil layer of the Songliao basin belongs to shallow lacustrine-delta facies and shallow lacustrine facies.The sedimentary tectonic sets belong to closed depression shallow lacustrine basin,and the stratigraphic sequence is similar to that of a craton basin and a gentle slope divergent continental margin.Climatic change controlled the formation of stratigraphic sequence of depression lacustrine basins.A typical integrated third-grade climate sequence should be composed of both a trangressive systems tract(TST) and a highstand systems tract(HST),with no lowstand systems tract(LST) is developing.Through cores,well logs,seismic comprehensive studies,the Quan 4th member of the Fuyu oil layer was determined as a third-grade climate sequence,with includes both a trangressive systems tract(TST) and a forced regressive margin systems tract(FRMST) at the top.The boundary between Quan 4th member and Quan 3rd members is a sequence boundary and the top interface of the sequence is the seismic reflection horizon(T2) of the Quan 4th member.Accurate identification and development of the framework of sequence stratigraphy is of guiding significance to the exploration and development of oilfields.更多还原