Laminae combination and shale oil enrichment patterns of Chang 73 sub-member organic-rich shales in the Triassic Yanchang Formation, Ordos Basin, NW China

被引:0
|
作者
XI Kelai [1 ]
LI Ke [1 ]
CAO Yingchang [1 ,2 ]
LIN Miruo [3 ]
NIU Xiaobing [4 ]
ZHU Rukai [5 ]
WEI Xinzhuo [1 ]
YOU Yuan [4 ]
LIANG Xiaowei [4 ]
FENG Shengbin [4 ]
机构
[1] Key Laboratory of Deep Oil and Gas, China University of Petroleum(East China)
[2] Laboratory for Marine Mineral Resources, Qingdao National Laboratory for Marine Science and Technology
[3] Key Laboratory of Deep Oil and Gas, China University of Petroleum
[4] PetroChina Changqing Oilfield Company
[5] Pertro China Research Institute of Petroleum Exploration & Development
关键词
D O I
暂无
中图分类号
P618.13 [石油、天然气];
学科分类号
0709 ; 081803 ;
摘要
The Chang 7sub-member of Triassic Yanchang Formation in the Ordos Basin was taken as an example and the lamina types and combinations, reservoir space features and shale oil enrichment patterns in organic-rich shale strata were investigated using core observation, thin section analysis, XRF element measurement, XRD analysis, SEM, high solution laser Raman spectroscopy analysis, and micro-FTIR spectroscopy analysis, etc. According to the mineral composition and thickness of the laminae, the Chang 7organic-rich shales have four major types of laminae, tuff-rich lamina, organic-rich lamina, silt-grade feldspar-quartz lamina and clay lamina. They have two kinds of shale oil-bearing layers, "organic-rich lamina + silt-grade feldspar-quartz lamina" and "organic-rich lamina + tuff-rich lamina" layers. In the "organic-rich + silt-grade feldspar-quartz" laminae combination shale strata, oil was characterized by relative high maturation, and always filled in K-feldspar dissolution pores in the silt-grade feldspar-quartz laminae, forming oil generation, migration and accumulation process between laminae inside the organic shales. In the "organic-rich + tuff-rich lamina" binary laminae combination shale strata, however, the reservoir properties were poor in organic-rich shales, the oil maturation was relatively lower, and mainly accumulated in the intergranular pores of interbedded thin-layered sandstones. The oil generation, migration and accumulation mainly occurred between organic-rich shales and interbedded thin-layered sandstones.
引用
收藏
页码:1342 / 1353
页数:12
相关论文
共 50 条
  • [31] The petrological characteristics and signif icance of organic-rich shale in the Chang 7 member of the Yanchang Formation,south margin of the Ordos basin,central China
    Sen Li
    RuKai Zhu
    JingWei Cui
    Zhong Luo
    JingGang Cui
    Han Liu
    WeiQiang Li
    [J]. Petroleum Science, 2019, 16 (06) - 1269
  • [32] Quantitative research on tight oil microscopic state of Chang 7 Member of Triassic Yanchang Formation in Ordos Basin, NW China
    Wang Minglei
    Zhang Sui'an
    Zhang Fudong
    Liu Yuting
    Guan Hui
    Li Jun
    Shao Liyan
    Yang Shen
    She Yuanqi
    [J]. PETROLEUM EXPLORATION AND DEVELOPMENT, 2015, 42 (06) : 827 - 832
  • [33] Quantitative research on tight oil microscopic state of Chang 7 Member of Triassic Yanchang Formation in Ordos Basin, NW China
    Wang, Minglei
    Zhang, Sui'an
    Zhang, Fudong
    Liu, Yuting
    Guan, Hui
    Li, Jun
    Shao, Liyan
    Yang, Shen
    She, Yuanqi
    [J]. Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development, 2015, 42 (06): : 757 - 762
  • [34] Extremely High Primary Productivity and Organic Matter Enrichment in Lacustrine Sediments: Late Triassic Chang 73 Sub-Member, Western Ordos Basin
    Liao, Zhiwei
    Wu, Zigang
    Chen, Qiang
    Zhang, Yi
    Wang, Xiaodong
    Liu, Yunqian
    Xu, Zhijie
    [J]. GEOFLUIDS, 2022, 2022
  • [36] Geology of the Chang 7 Member oil shale of the Yanchang Formation of the Ordos Basin in central north China
    Bai Yunlai
    Ma Yuhu
    [J]. PETROLEUM GEOSCIENCE, 2020, 26 (02) : 355 - 371
  • [37] Geological conditions for continental tight oil formation and the main controlling factors for the enrichment: A case of Chang 7 Member, Triassic Yanchang Formation, Ordos Basin, NW China
    Yang Hua
    Liang Xiaowei
    Niu Xiaobing
    Feng Shengbin
    You Yuan
    [J]. PETROLEUM EXPLORATION AND DEVELOPMENT, 2017, 44 (01) : 11 - 19
  • [38] Pyrite Characteristics in Lacustrine Shale and Implications for Organic Matter Enrichment and Shale Oil: A Case Study from the Triassic Yanchang Formation in the Ordos Basin, NW China
    Zhou, Qianshan
    Liu, Jiangyan
    Ma, Bo
    Li, Chao
    Xiao, Yueye
    Chen, Guojun
    Lyu, Chengfu
    [J]. ACS OMEGA, 2024, 9 (14): : 16519 - 16535
  • [39] Characteristics of Chang 7 shale gas in the Triassic Yanchang Formation, Ordos Basin, China
    Wang, Xiangzeng
    [J]. INTERPRETATION-A JOURNAL OF SUBSURFACE CHARACTERIZATION, 2017, 5 (02): : SF31 - SF39
  • [40] Pyrolysis characteristics of organic-rich shale from the Chang 7 member of Triassic Yanhe Profile in Ordos Basin
    Ge Z.
    Sun Q.
    Li D.
    Shi Q.
    Wei S.
    Yang T.
    [J]. Arabian Journal of Geosciences, 2021, 14 (11)