松辽盆地泉四段扶余油层地层层序新认识  

A New Explanation for the Stratigraphical Sequence of Quan 4^(th) Member of the Fuyu Oil Layer in the Songliao Basin

作　　者：李延平[1] 于坤[2] 姜耀俭[2] 陈树民[3] 张尔华[3] 宋永忠[3] 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266003 [2]大庆石油学院秦皇岛分院,河北秦皇岛066004 [3]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《中国海洋大学学报（自然科学版）》2007年第6期977-982,共6页Periodical of Ocean University of China

基　　金：大庆油田有限责任公司扶杨油层河道砂体地震识别项目(5100277)资助

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。Quan 4^th 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 4^th 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 4^th member and Quan 3^rd 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 sig- nificance to the exploration and development of oilfields.

关 键 词：泉四段扶余油层 闭塞浅水坳陷湖盆 地层层序 新认识 

分 类 号：P539.2[天文地球—古生物学与地层学]