陆相断陷湖盆层序地层单元的划分及界面识别标志  

CLASSIFICATION AND IDENTIFICATION OF SEQUENCE STRATIGRAPHIC UNITS IN A RIFT LAKE BASIN

作　　者：操应长[1] 姜在兴[1] 王留奇[1] 钱峥[1] 罗东明[2] 

机构地区：[1]石油大学勘探系,山东东营257062 [2]胜利油田

出　　处：《石油大学学报（自然科学版）》1996年第4期1-5,共5页Journal of the University of Petroleum,China(Edition of Natural Science)

基　　金：中国石油天然气总公司"八五"攻关项目"济阳坳陷下第三系层序地层学研究"

摘　　要：以济阳坳陷下第三系沙河街组层序地层学研究为基础.论述了陆相断陷湖盆不同级别的层序地层单元的划分及其界面识别标志。湖盆沉积按湖平面的变化特征可划分出层序、体系域、准层序组、准层序等层序地层单元.不同级别的层序地层单元边界在地震、测井、岩心、古生物、地球化学等资料中均有特征性反映.通过不同级别的层序地层单元边界的识别,可以建立起层序地层格架.进而研究每一单元的地层展布及沉积学特征.以指导油气勘探和开发。This paper deals with classifications and boundaries marks of different grades of sequence stratigraphic units in the Lower Tertiary - Shahejie formation in Jiyang depression -a continental rift lake basin. According to eustatic properties of lake levels, sedimentary strata in a lake basin can be classified into sequence, systems tract, parasequence set, parasequence. The sequence stratigraphic units boundaries of different grades can be identified particularly from seismic profiles, logging cures, cores, paleaontogic and geochemical data. The sequence stratigraphic frames were set up, and the stratigraphic distributions of different grades and sedimentary evolutions in a lake basin were studied. This study presents a new concept for stratigraphic analysis and the exploration and development of oil and gas.

关 键 词：层序地层 地层划分 地层界面 断陷盆地 湖相盆地 

分 类 号：P53[天文地球—古生物学与地层学]