Petrologic characteristics and sedimentary environments of bituminous sandstone in the Proterozoic Xiamaling Formation of Jibei Depression, Yanshan region
Zhu Yi-Xiu1,2, Yang Cheng-Yu1,2, Wang Huan1,2, Xiao Jin-Guang1,2
1 College of Geosciences, China University of Petroleum(Beijing),Beijing 102249,China; 2 State Key Laboratory of Petroleum Resources and Prospecting,China Unikersity of Petroleum (Beijing), Beijing 102249,China
Abstract We detail measured the Xiamaling Formation outcrops in Jibei Depression and carried thin section analysis and SEM observation on the bottom section of massive bituminous sandstone. A sedimentary environment analysis was carried by studying the distribution of bituminous sandstone,composition of the rock such as ratio of the clastic grain and interstitial materials,structure such as sorting, rounding, grain size,and petrological features. The outcome indicates the bituminous sandstone was composed mainly by high maturity quartz sandstone with 5%~15% bitumen filled within the intergranular pores. The sandstone was mainly fine grain sandstone and was well or extremely well sorted. The comprehensive analysis shows that the sedimentary environment of the bituminous sandstone in the Xiamaling formation was high energy foreshore to shoreface with no barriers. The probably depositional position of the bituminous sandstone was located between the lower foreshore to middle-upper shoreface. Besides,tidal channels also contribute sediments to the bituminous sandstone. The sedimentary environments in each measured outcrop profile was varies. The Lingyuan and Pingquan profiles mainly are high energy middle-up shoreface environments,while the Kuangcheng profile mainly are upper shoreface and lower foreshore environments. The Lingyuan and Kuangcheng profiles contain a few tidal channel deposits.
Fund:[Financially supported by the Foresight Project of Marine Oil and Gas of Sinopec(No. YPH08024)]
About author: Zhu Yi-Xiu,born in 1966,obtained his Ph.D. degree from China University of Geosciences(Beijing) in 2005 and is an associate professor at China University of Petroleum(Beijing). He is mainly engaged in sedimentology,petrology and reservoir geology. E-mail: zhuyixiu@cup.edu.cn.
Cite this article:
Zhu Yi-Xiu,Yang Cheng-Yu,Wang Huan et al. Petrologic characteristics and sedimentary environments of bituminous sandstone in the Proterozoic Xiamaling Formation of Jibei Depression, Yanshan region[J]. JOPC, 2019, 21(3): 431-440.
Zhu Yi-Xiu,Yang Cheng-Yu,Wang Huan et al. Petrologic characteristics and sedimentary environments of bituminous sandstone in the Proterozoic Xiamaling Formation of Jibei Depression, Yanshan region[J]. JOPC, 2019, 21(3): 431-440.
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