Xinjiang Petroleum Geology ›› 2004, Vol. 25 ›› Issue (1): 110-113.

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Petroleum Geology and Favorable Zones for Hydrocarbon Exploration in Llanos Basin, Colombia

ZHU Yi-xiu1,2, LIU Luo-fu2, JIN Qiang3   

  1. 1. China University of Geosciences, Beijing 100083, China;
    2. University of Petroleum, Beijing 102249, China;
    3. University of Petroleum, Dongy ing, Shandong 257061, China
  • Received:2003-06-04 Online:2004-02-01 Published:2020-08-06

Abstract: An integrated study on lithology, sedimentology, structural evolution and petroleum geology in Llanos basin of Colombia is made. Thechief source rocks are Guadalupe (K2) marine shale and carbonate rocks, major reservoir rocks are the shore-river-delta quartzose sandstone ofUpper Cretaceous to Oligocene, and regional cap rocks are Miocene Leon thick shale. The principal period for hydrocarbon migration and accu-mulation occur after the Miocene. The traps are classified into three ty pes: Tertiary trap group, Cretaceous trap group and composite trap groupbetween Tertiary and Cretaceous in overthrust frontal belt. Late Cretaceous to Early M iocene is the period of these traps formation. It is suggest-ed by comprehensive analysis that Llanos overthrust frontal belt is the favorable area for petroleum exploration, followed by the Apiari grabenand the Barinas depression, and the Llanos depress ion and Arauca graben are of certain potentials for hydrocarbon prospecting.

Key words: Colombia, Llanos basin, foreland basin, Gretaceous, Tertiary, hydrocarbon exploration

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