吐哈盆地侏罗系层序地层格架的建立
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摘要
吐哈盆地是一个陆相含油气盆地,侏罗系是主要的勘探目的层。运用层序地层学的理论和方法,通过对露头剖面、钻井和地震等资料的综合研究,可将侏罗系划分为七个层序(SQ1—SQ7)。层序SQ1相当于八道湾组和三工河组,SQ2相当于西山窑组一二三段,SQ3相当于西山窑组四段和三间房组一段,SQ4相当于三间房组二三段,SQ5、SQ6和SQ7分别相当于七克台组、齐古组和喀拉扎组。煤系烃源岩主要分布于层序SQ1和SQ2的基准面上升半旋回的上部,储集层主要发育在层序SQ1、SQ2、SQ3、SQ4和SQ5上升半旋回,层序SQ3、SQ4、SQ5下降半旋回和SQ6、SQ7层序是区域盖层发育的主要层位。
Turpan-Hami basin is a continental petroliferous basin in which Jurassic is its major prospected stratum.By using theory and method of high-resolution sequence stratigraphy,comprehensive studies of the outcrop section,drilling a nd seismic data are made,and the Jurassic is divided into seven sequences(SQ 1-SQ 7 ).SQ 1 corresponds to Badaowan formation and Sangonghe formation;SQ 2 to the first,second and third members of Xishanyao formation;SQ 3 to the fourth member of Xishanyao and the first member of Sanjianfang format ion;SQ 4 to the second and third members of Sanjianfang;SQ 5 ,SQ 6 and SQ 7 to Qiketai,Qigu and Kalazha formations,respectively.The coal measures sou rce rocks are most distributed in the upper part of SQ 1 and SQ 2 base-level rising hemicyclothem;the reservoir mainly in SQ 1-SQ 5 rising hemicyclothems.The SQ 3 ,SQ 4 and SQ 5 base-level falling hemicyclothem as well as SQ 6 and SQ 7 are the major horizons of regional cap rocks in this basin.
Turpan-Hami basin is a continental petroliferous basin in which Jurassic is its major prospected stratum.By using theory and method of high-resolution sequence stratigraphy,comprehensive studies of the outcrop section,drilling a nd seismic data are made,and the Jurassic is divided into seven sequences(SQ 1-SQ 7 ).SQ 1 corresponds to Badaowan formation and Sangonghe formation;SQ 2 to the first,second and third members of Xishanyao formation;SQ 3 to the fourth member of Xishanyao and the first member of Sanjianfang format ion;SQ 4 to the second and third members of Sanjianfang;SQ 5 ,SQ 6 and SQ 7 to Qiketai,Qigu and Kalazha formations,respectively.The coal measures sou rce rocks are most distributed in the upper part of SQ 1 and SQ 2 base-level rising hemicyclothem;the reservoir mainly in SQ 1-SQ 5 rising hemicyclothems.The SQ 3 ,SQ 4 and SQ 5 base-level falling hemicyclothem as well as SQ 6 and SQ 7 are the major horizons of regional cap rocks in this basin.
引文
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