Sedimentary Characteristics of Jurassic Kalazha Formation in the Thrust Belt on the Southern Margin of Junggar Basin

摘要/Abstract

摘要： In order to clarify the characteristics of deep reservoirs in the thrust belt on the southern margin of the Junggar basin, the markers, types, distribution and models of sedimentary facies and source directions of the Jurassic Kalazha formation are analyzed based on the data of outcrops, mud logging, trace elements and heavy minerals. The result shows that the sedimentary facies of alluvial fan and braided river delta are mainly developed in Kalazha formation. Laterally, three large sedimentary systems are distributed from west to east, which are the alluvial fan-braided river delta in the middle section of the Qigu fault-fold belt, the braided river delta in the Toutunhe area in the eastern section of the Qigu fault-fold belt, and the braided river delta in the Fukang fault belt. Vertically, there are four sedimentary cycles which follow a prograding sequence. The types and planar distribution of the sedimentary facies are mainly controlled by the activities of the Tianshan orogenic belt during the late Jurassic period. Sandstone reservoirs of more than 200 m thick are developed on the three large sedimentary systems. Especially, the sandstone reservoirs in the braided river delta front are well sorted, thick and widely distributed, which match well with the deep large anticlines and can be favorable exploration targets.

关键词: Junggar basin, thrust belt of the southern margin, Jurassic, Kalazha formation, alluvial fan, braided river delta, sedimentary facies, sedimentary model

Abstract: In order to clarify the characteristics of deep reservoirs in the thrust belt on the southern margin of the Junggar basin, the markers, types, distribution and models of sedimentary facies and source directions of the Jurassic Kalazha formation are analyzed based on the data of outcrops, mud logging, trace elements and heavy minerals. The result shows that the sedimentary facies of alluvial fan and braided river delta are mainly developed in Kalazha formation. Laterally, three large sedimentary systems are distributed from west to east, which are the alluvial fan-braided river delta in the middle section of the Qigu fault-fold belt, the braided river delta in the Toutunhe area in the eastern section of the Qigu fault-fold belt, and the braided river delta in the Fukang fault belt. Vertically, there are four sedimentary cycles which follow a prograding sequence. The types and planar distribution of the sedimentary facies are mainly controlled by the activities of the Tianshan orogenic belt during the late Jurassic period. Sandstone reservoirs of more than 200 m thick are developed on the three large sedimentary systems. Especially, the sandstone reservoirs in the braided river delta front are well sorted, thick and widely distributed, which match well with the deep large anticlines and can be favorable exploration targets.

Key words: Junggar basin, thrust belt of the southern margin, Jurassic, Kalazha formation, alluvial fan, braided river delta, sedimentary facies, sedimentary model

SI Xueqiang, YUAN Bo, PENG Bo, JI Dongsheng, GUO Huajun, TANG Xueying, DOU Yang, LI Yazhe. Sedimentary Characteristics of Jurassic Kalazha Formation in the Thrust Belt on the Southern Margin of Junggar Basin[J]. 新疆石油地质, 2021, 42(zk(English)): 64-73.

参考文献

[1] GUAN Shuwei,HE Dengfa,LEI Yongliang,et al.Kinematic classification,structural modeling and prospective fields of the foreland thrust belts in midwest China[J]. Petroleum Exploration and Development,2013,40(1):66-78.
[2] CHEN Shuping,QI Jiafu,YU Fusheng,et al.Deformation characteristics in the southern margin of the Junggar basin and their controlling factors[J]. Acta Geologica Sinica,2007,81(2):151-157.
[3] FANG Shihu,ZHAO Mengjun,ZHUO Qingong,et al.Mesozoic Cenozoic tectonic-sedimentary evolution in Junggar basin[M]. Beijing:Petroleum Industry Press,2015:99-103.
[4] JIA Chengzao,SONG Yan,WEI Guoqi,et al.Geological features and petroleum accumulation in the foreland basins in central and western China[J]. Earth Science Frontiers,2005,12(3):3-13.
[5] KUANG Jun,JIA Xiyu.Relationship between Himalayan movenment and hydrocarbon accumulation in southern margin of Junggar basin[J]. Xinjiang Petroleum Geology,2005,26(2):129-133.
[6] SI Xueqiang,YUAN Bo,GUO Huajun,et al.Reservoir characteristics and main controlling factors of Cretaceous Qingshuihe formation in the southern margin of Junggar basin[J]. Xinjiang Petroleum Geology,2020,41(1):38-45.
[7] FANG Shihu,GUO Zhaojie,SONG Yan,et al.Sedimentary facies evolution and basin pattern of the Jurassic in southern margin area of Junggar basin[J]. Journal of Palaeogeography,2005,7(3):347-356.
[8] TAN Chengpeng,YU Xinghe,LI Shengli,et al.The response relationship between base-level cycle and reservoirs of fan delta in Badaowan formation,southern Junggar basin[J]. Geology in China,2014,41(1):197-205.
[9] GUAN Xutong,WU Jian,WEI Lingyun,et al.Meandering river deposit and sand body architecture in Qigu formation of Jiangong coal mine section in the southern margin of Junggar basin[J]. Xinjiang Petroleum Geology,2019,40(3):290-297.
[10] LI Shunli,YU Xinghe,TAN Chengpeng,et al.Jurassic sedimentary evolution of southern Junggar basin:implication for palaeoclimate changes in northern Xinjiang Uygur Autonomous Region,China[J]. Journal of Palaeogeography,2014,3(2):145-161.
[11] GUO Huajun,SI Xueqiang,TANG Xueying,et al.Diagenetic characteristics and evaluation of Lower-Middle Jurassic reservoirs in Qigu fault-fold belt of the southern margin,Junggar basin[J]. Xinjiang Petroleum Geology,2020,41(1):46-54.
[12] SHAN Xin,YU Xinghe,LI Shengli,et al.The depositional characteristics and model of Kalazha formation in Shuimogou profile,Junggar basin[J]. Journal of China University of Mining & Technology,2014,43(2):262-270.
[13] CHEN Fajing,WANG Xinwen,WANG Xinwei.Prototype and tectonic evolution of the Junggar basin,northwestern China[J]. Earth Science Frontiers,2005,12(3):77-89.
[14] CAI Zhongxian,CHEN Fajing,JIA Zhenyuan.Types and tectonic evolution of Junger basin[J]. Earth Science Frontiers,2000,7(4):431-440.
[15] JI Youliang,ZHOU Yong,KUANG Jun,et al.The formation and evolution of Chepaizi-Mosuowan paleo-uplift and its control on the distributions of sedimentary facies in the Junggar basin[J]. Science China:Earth Sciences,2010,40(1):1 342-1 355.
[16] SI Xueqiang,GUO Mozhen,YANG Zhili,et al.Sedimentary characteristics and models of the Jurassic Xishanyao formation in Malang depression,Santanghu basin,Xinjiang[J]. Journal of Palaeogeography,2015,17(4):553-564.
[17] SI Xueqiang,LI Yazhe,WANG Shaoxia,et al.Sedimentary characteristics and models of the Permian Wutonggou formation in Lükqün area,Turpan-Hami basin,Xinjiang[J]. Journal of Palaeogeography,2018,20(5):803-814.
[18] ZHANG Tianfu,SUN Lixin,ZHANG Yun,et al.Geochemical characteristics of the Jurassic Yan’an and Zhiluo formations in the northern margin of Ordos basin and their paleoenvironmental implications[J]. Acta Geologica Sinica,2016,90(12):3 454-3 472.
[19] HATCH J R,LEVENTHAL J S.Relationship between inferred redox potential of the depositional environment and geochemistry of the Upper Pennsylvanian (Missourian) Stark shale member of the Dennis limestone[J]. Chemical Geology,1992,99:65-82
[20] 姜在兴. 沉积学[M]. 北京:石油工业出版社,2003.
JIANG Zaixing.Sedimentology[M]. Beijing:Petroleum Industry Press,2003.
[21] ZHU Xiaomin,DENG Xiuqin,LIU Ziliang,et a1. Sedimentary characteristics and model of shallow braided delta in large-scale lacustrine:an example from Triassic Yanchang formation in Ordos basin[J]. Earth Science Frontiers,2013,20(2):19-28.
[22] GAO Zhiyong,ZHOU Chuanmin,FENG Jiarui,et a1. Relationship between the Tianshan mountains uplift and depositional environment evolution of the basins in Mesozoic-Cenozoic[J]. Acta Sedimentologica Sinica,2016,34(3):415-435.
[23] LI Zhong,PENG Shoutao.U-Pb geochronological records and provenance system analysis of the Mesozoic-Cenozoic sandstone detrital zircons in the northern and southern piedmonts of Tianshan,northwest China:responses to intracontinental basin-range evolution[J].Acta Petrologica Sinica,2013,29(3):739-755.
[24] DU Jinhu,ZHI Dongming,LI Jianzhong,et al.Major breakthrough of Well Gaotan 1 and exploration prospects of lower assemblage in southern margin of Junggar basin,NW China[J]. Petroleum Exploration and Development,2019,46(2):205-215.
[25] HE Haiqing,ZHI Dongming,LEI Dewen,et al.Strategic breakthrough in Gaoquan anticline and exploration assessment on lower assemblage in the southern margin of Junggar basin[J].China Petroleum Exploration,2019,24(2):137-146.