Fault Characteristics and Hydrocarbon Geological Significances in
Rongxingtun Structural Zone of East Sag，Liaohe Depression

doi:10.11885/j.issn.1674-5086.2013.08.06.01

Abstract

Abstract:

There are lots of hydrocarbons discovered in Rongxingtun Area，Eastern sag，Liaohe Depression，while the obscure
and complex distribution of fault system caused difficulties for revealing hydrocarbon distribution and limited the further exploration
in this area. To reveal the fault characteristics and its geological significance，we delineated the classes，characteristics
and spatial combination characteristics of the faults by using the seismic profile，structure map and balanced section. The study
reveals that the faults properties，characteristics and evolution are very complex，which can be divided into the main faults
with north-east distribution and the secondary faults with north-west direction in the plane. They are superposed by three kinds
of fault systems in vertical direction，the extension faults in the third section of Shahejie Formation，the Dongying strike-slip
faults and Guantao compression faults separately. Three different fault systems superposed on the vertical direction. This kind
of complex fault systems deeply affect the formation，distribution and adjustment reservoir；specifically，the difference activities
led to the convex concave and basic tectonic framework and the formation of reservoirs，and controlled the hydrocarbon
source，various types of traps and volcanic-sandstone-mudstone reservoirs architecture：such characteristics make the fault system
the main channels for hydrocarbon migration and important clues to find oil，and most of the reservoirs are attached to the
faults and its related structure at different hierarchy.

Key words: Rongxingtun, faults, combination types, fault system, hydrocarbon accumulation

Chen Guomin1, Li Sanguo2, Wang Haifeng3, Shi Linchun4, Gao Jianjun4. Fault Characteristics and Hydrocarbon Geological Significances in
Rongxingtun Structural Zone of East Sag，Liaohe Depression[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2013.08.06.01.

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