西南石油大学学报(自然科学版) ›› 2008, Vol. 30 ›› Issue (6): 14-17.DOI: 10.3863/j.issn.1000-2634.2008.06.004

• 地质勘探 • Previous Articles     Next Articles

THE RESEARCH ON THE TIME AND SPACE VALIDITY OF HYDROCARBON GENERATION IN Es4-EkGAS SOURCE ROCKS，LIJIN AND MINFENG AREA

CAI Dong-mei1，2 JIANG You-lu1 LIU Hua1 XU Hao-qing1 SUN Li-dong3   

  1. 1.College of Georesources and Information，China University of Petroleum，Dongying Shandong 257061，China；2.Faculty of Resource and Information Technology，China University of Petroleum，Changping Beijing 102249，China；3.Exploration and Development Research Institute，Daqing Oilfield Limited Liability Company，Daqing Heilongjiang 163712，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-12-20 Published:2008-12-20

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Abstract:

Based on the hydrothermal history reconstruction，the hydrocarbon generation history is investigated for Es4Ek formation，Lijin and Minfeng area.The

hydrocarbon history reconstruction shows that the paleogeothermal gradients decreased from Cenozoic era on，the value was 5.28℃/100m at the late stage of Kongdian

Formation and then decreased to the present value averaging 3.60℃/100m.The gas source rocks evolution are various in different formations and tectonic positions，the

associated gas generation stage of upper Es4 gas source rocks starts at the the present，the pyrolysis gas generation stage of lower Es4 gas source rocks has prolonged

from late Guantao Formation deposition to now and the pyrolysis gas generation stage of Ek2 gas source rocks has lasted from Es1 group deposition to nowadays.

Key words: Lijin and Minfeng area, gas source rocks, thermal evolution, hydrocarbon generation history

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