Hydrocarbon of Liangjialou oilfield in Dongying depression
is from source rock of Es3 in Lijing sag and Niuzhuang sag.Main
reservoirs of it happen in Es3 ,the second are in Es2 and Es4 . The
partable caprock is occurred in Es3 , but regional caprock is
dispersed in Es1 . The timeing of hydrocarbon reservoirs is in the
sedimentary period of Minghuazhen Formation , and larger
structural movements have not been occurred since the
sedimentary period of Minghuazhen Formation , so conditions of
resevoirs preservation are relatively better. Two models of
hydrocarbon reservoir generation exist in Liangjialou oilfield ,one
is that hydrocarbon reservoirs and its source rock are in same
stratrum ,and hydrocarbon migration direction is lateral ,another is
that they are in different stratrum , and hydrocarbon migration
direction is vertical.
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