摘要
以高分辨率层序地层学原理为指导,通过对野外露头、钻井岩心及测井资料的综合研究,在层序界面识别的基础上,将富县地区延长组划分为1个超长期、4个长期、22个中期旋回层序及若干个短期旋回层序。其短期旋回层序可细分为非对称型和对称型2种基本类型及7种亚类型,并详细分析了不同短期旋回的堆砌样式、沉积相及空间分布模式。选择中期旋回层序界面和最大湖泛面作为等时地层对比的优选位置,建立了高分辨率层序地层格架,为研究区砂体、烃源岩展布规律研究提供了一定的理论依据。
Under the guidance of high resolution sequence stratigraphy theory,based on field crop,cores and well logging data,the Yanchang Formation in Fuxian area can be divided into one super long-term sequence cycle（SLSC）,four long-term sequence cycles（LSC）,22 middle-term sequence cycles（MSC） and several short-term sequence cycles（SSC）.The short-term sequence cycles can be subdivided into two species and seven subspecies.We analyzed the styles,sedimentary facies and spatial distribution of the different short-term sequence cycles.We chose middle-term sequence interfaces and max flooding surfaces as correlation interfaces in stratigraphic correlation,and established the sequence stratigraphic framework of Yanchang Formation in Fuxian area,which can provide a theoretical basis for recognizing the distribution of sand bodies and source rocks.
出处
《岩性油气藏》
CSCD
2012年第6期88-93,共6页
Lithologic Reservoirs
关键词
高分辨率
层序地层学
沉积旋回
地层格架
延长组
鄂尔多斯盆地
high resolution
sequence stratigraphy
sedimentary cycle
stratigraphic framework
YanchangFormation
Ordos Basin
