Characteristics and Genesis of Turbidite of Chang 6 and Chang 7 Oil Reservoirs in Huachi-Qingyang Area of Ordos Basin, China

详细信息   

• 责任者：Zhang Haifeng (Research Institute of Exploration and Development of Changqing Oil Field Company ; Xi＇an 710018 ; China) ; Tian Jingchun
• 刊名：Journal of Chengdu University of Technology
• 出版年：2012
• 卷期：38(3)
• 页码：p.238-243
• issnNo：ISSN1671-9727
• isbnNo：CN51-1634/N

摘要

The paper uses the data of drilling cores, logging and seism in study area to research the turbidite features in detail developed during the deposition of Member 6 and Member 7 of the Upper Triassic Yanchang Formation （Chang 6 and Chang 7） oil reservoirs in the Huaehi-Qingyang area of Ordos Basin in China. The features include the bottom cast general development, the obvious flysch rhythms, the typical Bouma sequence, size distribution of paralleling to the C=M baseline, and the Sahu discrimination value of 7. 357. According to the different provenances, the turbidite types are classified as two types： （1） one comes from the northeast gentle slope delta front; （2） another comes from the south and southwest steep slope delta front. Furthermore, based on the above, the paper compares the differences between the two types of turbidite in formation mechanism, size, sand body morphology and litho facies and establishes the genetic model of the turbidite under different depositional settings.