Discussion on Condition of Immature-Low Mature Oil Formation in Xiangcheng Sag
Received date: 2009-08-31
Revised date: 2010-04-25
Online published: 2010-10-10
In the view of main geologies of regional tectonic setting and sediment environmental changes in Xiangcheng sag, combining with organic geochemistry of source rock and crude oil, we used organic macerals, inspecting biomarkers and organic petrology to illustrate organic matter abundance and type of source rocks, especially for the parent source of hydrocarbons. We also elucidated the discriminating indices and genetic origin of immature oil in Hetaoyuan Formation of Xiangchen sag, and pointed out the main geological conditions for immature-low mature oil formation. We suggested that self-generating and self-preserving fault noses, lithological and fracture reservoirs would be a favorable exploration area in the Eh2 Member, for these reservoir has the short migration and handy accumulation of oil and gas.
YAO Ya-ming, ZHANG Lian-Sheng, QIAO Gui-Lin, YAN Yong-Xin, HE Ming-xi, MA Wan-yi . Discussion on Condition of Immature-Low Mature Oil Formation in Xiangcheng Sag[J]. Natural Gas Geoscience, 2010 , 21(5) : 815 -821 . DOI: 10.11764/j.issn.1672-1926.2010.05.815
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