摘要
应用层序地层学理论,对滨里海盆地东缘石炭系各岩性段进行分析对比和沉积古地理研究,建立了研究区的层序地层格架。将研究区石炭系划分成5个二级层序(自下而上依次为SS1—SS5)和11个三级层序(依次为S1—S11)。在层序等时对比的基础上,研究了各层序岩性组合在盆地中不同区带的发育状况、展布特点以及优质储集层可能的发育区。二级层序SS5和SS2高位体系域的一套白云岩储集层和一套滩体灰岩,分别与SS5顶部和SS3中广泛发育的泥岩盖层组成良好的储盖组合,并形成重要的油气藏。从已发现的油气藏分布来看,区域构造位置相对高的部位有利于碳酸盐岩储集相带的发育。
The analysis,comparison and sedimentary paleogeographic study of Carboniferous strata in the eastern margin of Pre-Caspian basin are conducted using sequence stratigraphy theory,developing the sequence stratigraphic framework in this area.The Carboniferous is divided into 5 second-order sequences,namely SS1-SS5 from the bottom up,and 11 third-order sequences,namely S1-S11 in turn.On the basis of isochronous correlation,the sedimentary feature,lithological combination and the favorable area of high-quality reservoir in different zones of this basin are presented.It is suggested that in highstand system tract（HST） the SS5 and SS2 occurs one dolomite reservoir and one beach limestone reservoir,respectively corresponding to the mudstone cap rocks of top SS5 and SS3,shaping good reservoir-seal assemblages and forming important oil-gas reservoirs.From the discovered reservoirs distribution,relatively high parts in regional structure are favorable for development of carbonate reservoirs.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2013年第4期483-487,共5页
Xinjiang Petroleum Geology
关键词
滨里海盆地
石炭系
层序地层
储盖组合
Pre-Caspian basin
Carboniferous
sequence stratigraphy
reservoir-seal assemblage
