溱潼凹陷阜一段层序地层格架及沉积体系研究
|
摘要
溱潼凹陷属走滑伸展型断陷,应用层序地层学原理和方法,建立了阜一段的层序地层格架,并在阜一段识别出湖泊三角洲和湖泊两大沉积体系。同时结合含砂率与地震属性研究,恢复了阜一段低位域、湖扩域和高位域的沉积体系,认为各体系域沉积体系在时空展布上具有一定的继承性和差异性。综合分析认为,研究区阜一段东部的殷庄—广山地区在低位域时发育大型三角洲沉积体系,主要以前缘河口坝及席状砂沉积为主,可作为良好储集层;西部斜坡带华港—北汉庄地区,低位域及高位域均发育三角洲沉积体系且规模较大,主要为平原河道及前缘河口坝沉积,也可作为很好的油气储层。
Qintong Sag is a downfaulted lacustrine basin with strike-slip faulting.With the sequence stratigraphy theory and method,stratigraphic framework of the first member of Funing Formation has been established,and two types of depositional system have been discerned,including delta system and lacustrine depositional system.Then based on analysis of sand content and seismic attributes,depositional systems of lowstand system tract,expanding system tract and highstand system tract of the first member of Funing Formation have been recovered,and this research shows that the characteristics of time-space distribution of these three system tracts have certain inheritance and discrepancy.Comprehensive studies suggests that,in Qintong Sag,Yinzhuang-Guangshan area has developed large delta depositional system in the depositional period of lowstand system tract,dominated by mouth bar and sheet sand,and these two types of sandbody can be good reservoirs;Huagang-Beihanzhuang area of the west slope belt has developed large scale delta depositional system in the depositional period of lowstand system tract and highstand system tract,dominated by plain channels and mouth bar of delta front,and this type of sand also can be good petroleum reservoir.
Qintong Sag is a downfaulted lacustrine basin with strike-slip faulting.With the sequence stratigraphy theory and method,stratigraphic framework of the first member of Funing Formation has been established,and two types of depositional system have been discerned,including delta system and lacustrine depositional system.Then based on analysis of sand content and seismic attributes,depositional systems of lowstand system tract,expanding system tract and highstand system tract of the first member of Funing Formation have been recovered,and this research shows that the characteristics of time-space distribution of these three system tracts have certain inheritance and discrepancy.Comprehensive studies suggests that,in Qintong Sag,Yinzhuang-Guangshan area has developed large delta depositional system in the depositional period of lowstand system tract,dominated by mouth bar and sheet sand,and these two types of sandbody can be good reservoirs;Huagang-Beihanzhuang area of the west slope belt has developed large scale delta depositional system in the depositional period of lowstand system tract and highstand system tract,dominated by plain channels and mouth bar of delta front,and this type of sand also can be good petroleum reservoir.
引文
[1]苏浙皖闽油气区石油地质志编委会.中国石油地质志(卷八)[M].北京:石油工业出版社,1992:248-257.
[2]周荔青,刘池阳,陆黄生,等.苏北盆地阜三段油气成藏规律[J].石油实验地质,2004,26(2):187-193.
[3]李思田,解习农,王华,等.沉积盆地分析基础与应用[M].北京:高等教育出版社,2004:70-110.
[4]纪友亮.层序地层学[M].上海:同济大学出版社,2005:31-59.
[2]周荔青,刘池阳,陆黄生,等.苏北盆地阜三段油气成藏规律[J].石油实验地质,2004,26(2):187-193.
[3]李思田,解习农,王华,等.沉积盆地分析基础与应用[M].北京:高等教育出版社,2004:70-110.
[4]纪友亮.层序地层学[M].上海:同济大学出版社,2005:31-59.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心