The Sedimentation during Chang 9 Oil Formation in Yanchang Formation, Ordos Basin
详细信息
- 责任者：Zhu Jing (Department of Geology ; Northwest University ; Xi’an 710069 ; China) ; Zhu Yajun
- 刊名：Journal of Northwest University
- 出版年：2013
- 卷期：41(1)
- 页码：p.93-100
- issnNo：ISSN1000-274X
- isbnNo：CN61-1072/N
摘要
Aim To study the depositional setting,lake strandline,distribution rule of sedimentary facies and sand body.Methods Based on the study to the outcrop section,well core section and observation of core,data test as well as logging data analysis is done upon the sedimentary characteris tics particularly.Results Ordos Basin is a southeast opening lake basin in Chang 9,in which the southwest is stiff,the northeast is smooth,the depocenter moves from southeast to northwest in the period of Chang 92—Chang 91,the Chang 91 succeeds the Chang 92 well;the depositional pattern during Chang 9 oil formation,the first lacustrine transgression period,is characterized by delta-half-deep lake facies,sand body developed well,and the prototypes of delta are the basis of the delta developed in Yanchang period.Conclusion The sand body is found in all the basin of Chang 9 formation,and in some area,the oil layer is developed.All those show good prospects in exploration.
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