柴达木盆地油砂山油田上干柴沟组沉积微相特征柴达木盆地油砂山油田上干柴沟组沉积微相特征.pdf

Advances in Geosciences 地球科学前沿, 2014, 4, 147-156 Published Online June 2014 in Hans. /journal/ag /10.12677/ag.2014.43018 Microfacies Characteristics of Upper Ganchaigou Formation of Youshashan Oilfield in Qaidam Basin 1 1* 1 2 1 1 Yinhao Dong , Jun Tang , Yongfang Li , Shaoming Li , Li Zeng , Bin Zhou 1 Geosciences School, Yangtze University, Wuhan 2 Technology and Withdrawal Institute, Jianghan Oilfield, Wuhan * Email: 918343917@, tang0262@ st nd th Received: Apr. 1 , 2014; revised: May 2 , 2014; accepted: May 9 , 2014 Copyright © 2014 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract Based on core observation and logging analysis, the upper Ganchaigou formation of Youshashan in Qaidam Basin is determined to deposit in the terrigenous clastic transitional environment from the braided delta to the shallow river, through the research on its sedimentary background, source direction, sedimentary structure and analysis of grain sizes. The region is dominated by shallow- water delta front, including the braided distributary channels, interdistributary areas, sub- aqueous distributary channels, sub-aqueous interdistributary areas, mouth bars, distal bars, sheet sands, sand bars, sand beaches, grain banks, shallow-lake sheet sands and mudflats. What’s more, on the basis of single-well facies analysis, integrated with a great mass of geophysical logging and well logging data, a study has bee