下生上储式油气运移优势路径确定方法及其应用

doi:10.11743/ogg20180613

Abstract

Abstract: The study is based on the analysis of characters of hydrocarbon migration within a lower source rock-upper reservoir combination,and 3D seismic and logging data.We worked out a method to determine the preferential pathways for hydrocarbon migration through combining fault activity ratio with hydrocarbon potential energy on fault plane and combining net-to-gross ratio with fluid potential on top of sand bodies.It can be used to define the scope of preferential hydrocarbon accumulation in this mode.Its application in the 1^st member of Nantun Formation (K₁n¹) within a local structure of Bei’er Sag,Hailar Basin,reveals that hydrocarbon migration in the reservoir could be divided into two modes:the mode of vertical migration and the mode of vertical migration followed by lateral migration.There are 17 preferential migration pathways for the former and 11 for the latter.Correspondingly,their scopes of preferential hydrocarbon accumulation are within 2.3 km and 1km respectively,just coinciding with the practical hydrocarbon distribution.It demonstrates that this method is feasible for determining preferential pathways in hydrocarbon migration within a lower source rock-upper reservoir combination,and conducive to delineating the scope of petroliferous region in the reservoir.In conclusion,it is of importance to guide future petroleum exploration.

Key words: combination of “lower source rock with upper reservoir”, hydrocarbon accumulation assemblage, hydrocarbon migration, preferential pathway, Nantun Formation, Hailar Basin

CLC Number:

TE122.1

Wang Haoran, Fu Guang, Su Bilin, Sun Tongwen, Tang Wenhao. A method to determine preferential pathways for hydrocarbon migration in “lower source rock and upper reservoir” combination and its application[J]. Oil & Gas Geology, 2018, 39(6): 1237-1245.

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A method to determine preferential pathways for hydrocarbon migration in “lower source rock and upper reservoir” combination and its application

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