Formation and accumulation mechanism of shale oil in the 7th member of Yanchang Formation, Ordos Basin

被引：0
|
作者：
Li S. [1 ,2 ]
Niu X. [2 ,3 ,4 ]
Liu G. [5 ,6 ]
Li J. [1 ,2 ]
Sun M. [5 ,6 ]
You F. [5 ,6 ]
He H. [7 ]
机构：
[1] Exploration and Development Research Institute of Changqing Oilfield Company, PetroChina, Xi'an, 710018, Shaanxi
[2] National Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, Xi'an, 710018, Shaanxi
[3] No.8 Oil Production Plant of Changqing Oilfield Company, PetroChina, Xi'an, 710000, Shaanxi
[4] China University of Petroleum (East China), Qingdao, 266580, Shandong
[5] College of Geosciences, China University of Petroleum (Beijing), Beijing
[6] State Key Laboratory of Petroleum Resource and Prospecting, Beijing
[7] China University of Petroleum (Beijing) at Karamay, Karamay, 834000, Xinjiang
来源：
| 1600年 / Editorial Department of Oil and Gas Geology卷 / 41期
关键词：
Accumulation mechanism; Change; 7; member; Ordos Basin; Organic-rich shale; Shale oil;
D O I：
10.11743/ogg20200406
中图分类号：
学科分类号：
摘要：
Shale oil is a kind of important unconventional hydrocarbon resource in urgent need of exploitation. A systematic analysis of the forming conditions and accumulation mechanisms of shale oil in the 7th member of the Yanchang Formation (Chang 7 member) in Ordos Basin was carried out by using petro-chemistry and source rock geochemistry methods. The results show that the oil shale deposited in the member is extremely rich in organic matter with an average residual organic carbon abundance of 7.4%, and contains well-developed micro- and nano-pores for shale oil accumulation. Three main mechanisms of shale oil accumulation in the member are brought forward in this study: (1) both high organic matter productivity and strong reducing water environment served to effectively preserve organic matters in the super eutrophic lake basin during deposition, and organic shale of high abundance developed thereby provided the material basis for shale oil generation; (2) organic-rich shale characterized by strong oil-generating capacity, high conversion efficiency, and high intensity of oil expulsion in the member provided favorable conditions for the generation of shale oil in large scale; and (3) the dual occurrence mode of shale oil, i.e., organic matter adsorption and pore retention, provided various ways for the enrichment of shale oil in the member. © 2020, OIL & GAS GEOLOGY Editorial Board. All right reserved.
引用
收藏
页码：719 / 729
页数：10
相关论文
共 41 条
  • [1] Jia Chengzao, Zheng Min, Zhang Yongfeng, Unconventional hydrocarbon resources in China and the prospect of exploration and development, Petroleum Exploration and Development, 39, 2, pp. 121-136, (2012)
  • [2] Li Denghua, Liu Zhuoya, Zhang Guosheng, Et al., Comparison and revelation of tight oil accumulation conditions, distribution characteristics and development status between China and U.S, Natural Gas Geoscience, 28, 7, pp. 1126-1138, (2017)
  • [3] Luo Chengxian, Zhou Weihui, Shale oil development in US and implications, Sino-Global Energy, 18, 3, pp. 3-40, (2013)
  • [4] Song Yan, Li Zhuo, Jiang Zhenxue, Et al., Progress and development trend of unconventional oil and gas geological research, Petroleum Exploration and Development, 44, 4, pp. 638-648, (2017)
  • [5] Wang Hongjun, Ma Feng, Tong Xiaoguang, Et al., Assessment of global unconventional oil and gas resources, Petroleum Exploration and Development, 43, 6, pp. 850-862, (2016)
  • [6] Zhou Qingfan, Yang Guofeng, Current situation and development prospect of shale oil and gas exploration and development in the United States, International Petroleum Economy, 26, 9, pp. 39-46, (2018)
  • [7] Jia Chengzao, Zou Caineng, Li Jianzhong, Et al., Assessment criteria, main types, basic features and resource prospects of the tight oil in China, Acta Petrolei Sinica, 33, 3, pp. 343-350, (2012)
  • [8] Zou Caineng, Tao Shizhen, Hou Lianhua, Unconventional petroleum geology, pp. 22-71, (2011)
  • [9] Zou Cai-neng, Zhu Rukai, Bai Bin, Et al., Significance, geologic characteristics, resource potential and future challenges of tight oil and shale oil, Bulletin of Mineralogy, Petrology and Geochemistry, 34, pp. 1-17, (2015)
  • [10] Zou Caineng, Zhu Rukai, Wu Songtao, Et al., Types, characteristics, genesis and prospects of conventional and unconventional hydrocarbon accumulations: taking tight oil and tight gas in China as an instance, Acta Petrolei Sinica, 33, 2, pp. 173-187, (2012)
12345