Basin Modeling of Buried History and Maturity History of Source Rock in Liaohe Basin

QIN Cheng-zhi; WANG Xian-bin; LIN Xi-xiang; TUO Jin-cai; ZHOU Shi-xin

The model system，Which is an incomplete three- dimensional model (X，Y，vertical geological layers and time)about the buried history and the maturity history of source rock in Liaohe Basin，is built and programmed. The model simulates the buried history of every depression by the Backstrip ping method While the unconformity is considered. The R_o evolution progress of source rock is simulated by TTI-R_o relationship after the TTI history is calculated With the paleo-temperature gradients. So，the maturity history is reconstructed. According to the result of model system，there are two deposit centers of East Depression,Which are Niuju and Gaolifang- Yongxingtun area,two deposit centers of West Depression,Which are Taian and Panshan- DaCingshuigou area,also two deposit centers of Damintun Depression,Which are Rongshengbao and the North area of Jinganbao.And Es³ of East Depression,Es⁴ and Es³ of West Depression,Es⁴ and Es³ of Damintun Depression,Which have been in oil Window，are main source layers of Liaohe Basin.

1 State key Laboratory of Resources and environmental lnformation System,lnstitute of geographic Sciences and natural Resources Research, CAS, Beijing,100101;

2 Lanzhou lnstitute of geology, Chinese Academy of Sciences, Lanzhou,730000

Received Date: 2001-08-23

Rev Recd Date: 2002-03-31

Key words:

Abstract: The model system，Which is an incomplete three- dimensional model (X，Y，vertical geological layers and time)about the buried history and the maturity history of source rock in Liaohe Basin，is built and programmed. The model simulates the buried history of every depression by the Backstrip ping method While the unconformity is considered. The R_o evolution progress of source rock is simulated by TTI-R_o relationship after the TTI history is calculated With the paleo-temperature gradients. So，the maturity history is reconstructed. According to the result of model system，there are two deposit centers of East Depression,Which are Niuju and Gaolifang- Yongxingtun area,two deposit centers of West Depression,Which are Taian and Panshan- DaCingshuigou area,also two deposit centers of Damintun Depression,Which are Rongshengbao and the North area of Jinganbao.And Es³ of East Depression,Es⁴ and Es³ of West Depression,Es⁴ and Es³ of Damintun Depression,Which have been in oil Window，are main source layers of Liaohe Basin.

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Basin Modeling of Buried History and Maturity History of Source Rock in Liaohe Basin

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