Geochemical Characteristics and Oil Source Correlation of Paleo-Reservoirs in Biluocuo Area, Qiangtang Basin

被引：0
|
作者：
Yang Y. [1 ,2 ]
Huang Z. [1 ,2 ]
Zhao Z. [3 ]
Tang Y. [4 ]
机构：
[1] College of Geosciences, China University of Petroleum, Beijing
[2] State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing
[3] Chinese Academy of Geological Sciences, Beijing
[4] College of Resources and Enviroment, Yangtze University, Wuhan
来源：
Diqiu Kexue - Zhongguo Dizhi Daxue Xuebao/Earth Science - Journal of China University of Geosciences | 2022年 / 47卷 / 05期
关键词：
Biomarker; Oil⁃source correlation; Paleo⁃reservoir; Petroleum geology; Qiangtang basin; Source rock;
D O I：
10.3799/dqkx.2022.008
中图分类号：
学科分类号：
摘要：
Qiangtang basin is a large Mesozoic marine sedimentary basin, in which several sets of source rocks are developed, and many paleo⁃reservoirs and hydrocarbon indications are discovered. Determining the oil source of paleo⁃reservoirs is very important for oil and gas exploration. In order to clarify the oil source of the paleo⁃reservoir, geochemical analysis of oil and source rock samples is carried out in this paper. The results show that the paleo⁃reservoirs can be divided into two types: type I paleo⁃reservoirs are in the mature-high mature stage in general with the high content of C24 tetracyclic terpane, the low tricyclic terpane abundance, C29 regular sterane with certain advantages in content, and high C29 hopane content, reflecting the contribution of terrigenous organic matter. Type II paleo⁃reservoir is in the low mature-mature stage in general, with C23 tricyclic terpane as the main peak, low content of C24 tetracyclic terpane and the domination of C27 regular sterane, indicating the precursor was mainly lower aquatic organisms. The oil-source correlation result shows that the two types of paleo⁃reservoirs come from different source rocks. Type I crude oil comes from the source rocks of Zhana Formation of Upper Triassic, and type II crude oil is mainly contributed by the source rocks of Quse Formation of Lower Jurassic. © 2022, Editorial Department of Earth Science. All right reserved.
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页码：1834 / 1848
页数：14
相关论文
共 45 条
  • [1] Bao J.P., Zhu C.S., Wang L.Q., Geochemical Characteristic Comparison of Crude Oil Samples from the Western Qaidam Basin, Oil & Gas Geology, 31, 3, pp. 353-359, (2010)
  • [2] Chen Z.H., Zha M., Jin Q., Et al., Distribution and Characteristics of the Homohopane Molecular Parameters in Paleogene System of the Dongying Sag, Acta Sedimentologica Sinica, 29, 1, pp. 173-183, (2011)
  • [3] Du Q.D., Yi H.S., Lin J.H., Et al., Organic Geochemical Characteristics of Dolomite Reservoir in Shuanghu Region. Qiangtang Basin, Petroleum Geology and Recovery Efficiency, 17, 1, pp. 22-24, (2010)
  • [4] Fu X.G., Liao Z.L., Wang J., Et al., Geochemistry and Significance of Oil Seepages in the Zaring Area of the Southern Qiangtang Depression, Northern Tibet, Acta Sedimentologica Sinica, 26, 4, pp. 697-704, (2008)
  • [5] Gao H.X., Practical Statistical Methods and SAS System, pp. 199-255, (2001)
  • [6] Gong J.M., Zhang L., Chen X.H., Et al., Discussion on Original Organic Types of Over⁃Mature Source Rocks in Wuli Permafrost Zone of Qinghai⁃Tibeatean Plateau, Northwestern Geology, 47, 2, pp. 208-215, (2014)
  • [7] Huang D. F., Li J. C., Zhang D. J., Et al., Maturation Sequence of Tertiary Crude Oils in the Qaidam Basin and Its Significance in Petroleum Resource Assessment, Journal of Southeast Asian Earth Sciences, 5, 1-4, pp. 359-366, (1991)
  • [8] Hou D.J., Feng Z.H., Oil and Gas Geochemistry, pp. 201-242, (2011)
  • [9] Ji C.J., Biomarker Characteristics and Oil⁃Source Correlation Research of the Reservoirs in Southern Qiangtang Depression, (2015)
  • [10] Li R.W., Geological Occurrence and Paleoenvironmental Significance of Gammacerane, Chinese Science Bulletin, 33, 20, pp. 1574-1576, (1988)
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