The Forming Conditions And Exploration Zone Selection Of Paleogene And Bedrock In The Northern Of Liaohe Eastern Sag

There are rich oil and gas resources in the northern of liaohe eastern sag, and there is a lot of exploration potential here.The recent discovery of ciiyutuo hill reservoirs brokes the stagnation continuatd 10 years.Also proposed a new task that how to develop deep formation exploration.This study is for the hill and paleogene.The purposes are clearing the forming conditions of this area and presenting favorable zones,by the formation, structure,oil source,deposition,and reservoir study. By analysising stratigraphic sequence,divided shahejie formation into four three-levels sequences and defined research units for tectonic and sedimentary studies.By tectonic studies,focusing on the structural form of buried hill and shahejie formation target layer.And identified favorable structuret.Sedimentary and reservoir studies indicate that there deposited large-scale sublacustrine fan and fan delta.Sediment source analysis showed that there are four paleogene provenance in eastern side.Binding hill lithology,reservoir studies and tongerpu fracture properties analysis,clearing that archean rocks of this area are composed by mixed granite and gneiss which are favorable lithologies,and intrusive rock as compartment.By multi-period tectonic movements,deep fault emerge large quantity tectonic fractures.There provided necessary conditions for bedrock insider accumulation.Based on the above understanding,by hydrocarbon accumulation mode analysis,point out four favorable zones including ciiyutuo hill,Tongerpu hill,niuju- qinglongtai deep formation and shendanpu belt.