摘要
充分利用已有的钻井、测井、录井、地震等资料 ,应用地震地层学、层序地层学和沉积学理论 ,对准噶尔盆地东部五彩湾 -石树沟地区的中二叠统层序地层进行研究。将中二叠统将军庙组至平地泉组划分为一个层序 ;又根据不同的沉积组合和几何形状 ,把将军庙组划分为低水位体系域 (L ST) ,平地泉组三段至二段下部划分为湖侵体系域 (TST) ,平地泉组二段下部至一段划分为高水位体系域 (HST) ,凝缩段难以确定。低水位体系域主要为冲积扇、滨浅湖沉积 ,湖侵体系域为半深湖 -深湖、水下扇沉积 ,高水位体系域为扇三角洲前缘。
In this paper, the authors put forward a plan of sequence stratigraphic division in the Wucaiwan Shishugou region on the basis of using the theories of seismic stratigraphy, sequence stratigraphy and sedimentology to analyze the data of wells, log and seism. The plan is as follows: the Jiangjunmiao Formation and Pingdiquan Formation of Middle Dyas Series are grouped into a sequence. And then according to the depositional assemblage and geometric figure, the authors think that the Jiangjunmiao Formation (P 2 j ) makes up lowstand system tract (LST), the third part and the lower of the second part of the Pingdiquan Formation (P 2 p 3 P 2 p 2) construct the transgressive systems tract (TST), the upper of the second part and first part of the Pingdiquan Formation (P 2 p 2 P 2 p 1) form the highstand system tract (HST). LST mainly is the deposition of alluvial fan and off shore shollow lake. TST is the deposition formed by subaquatic fan and hemideep lake deep lake. HST is the deposition made by fan delta and subaquatic fan.
出处
《成都理工学院学报》
CSCD
北大核心
2001年第4期371-375,共5页
Journal of Chengdu University of Technology
