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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2013  >  35(2): 179-186
Qin Jianzhong, Shen Baojian, Tenger, Zheng Lunju, Tao Guoliang, Fu Xiaodong, Zhang Linglong. Hydrocarbon generation and expulsion pattern of different types of excellent source rocks[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(2): 179-186. doi: 10.11781/sysydz201302179
Citation: Qin Jianzhong, Shen Baojian, Tenger, Zheng Lunju, Tao Guoliang, Fu Xiaodong, Zhang Linglong. Hydrocarbon generation and expulsion pattern of different types of excellent source rocks[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(2): 179-186. doi: 10.11781/sysydz201302179
shu

Hydrocarbon generation and expulsion pattern of different types of excellent source rocks

doi: 10.11781/sysydz201302179
  • 1.

    Wuxi Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

  • 2. SINOPEC Key Laboratory for Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China

  • Received Date: 2012-11-09
  • Rev Recd Date: 2013-01-25
  • Publish Date: 2013-03-28
    Abstract
  • Semi-closed pyrolysis experiments were conducted in order to evaluate what controls the hydrocarbon generation and expulsion efficiency for three types of excellent source rocks (siliceous, calcareous and clay ones). Each type of source rock has different relative hydrocarbon expulsion efficiencies in the stage of early-middle oil window, where siliceous source rock has the highest oil expulsion efficiency and oil expulsion quantity, reaching to 50%, and the expelled products are dominated by heavy oil. This is followed by calcareous source rock, about 30%. The oil expulsion efficiency of clay source rock is the lowest, about 4%-11%. During the middle-late maturation stage, siliceous source rock tends to achieve the highest expulsion efficiency first, followed by calcareous source rock (65%) and then clay source rock. During the late and high-mature stage, the oil expulsion efficiencies of siliceous and calcareous source rocks do not change obviously, while the oil expulsion efficiency of clay source rock increases rapidly from 20% to 90%. The models of hydrocarbon generation and expulsion of three types of excellent source rocks are different in the stage of early-middle oil window.

     

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