PROPERTIES OF RESERVOIR ROCKS IN DUJIATAI OIL FORMATION, BLOCK HUAN 50, WESTERN LIAOHE DEPRESSION

The reservoir sandbody of Dujiatai oil formation in the study area can be genetically attributed to anear-sourced and rapidly accumulated fan delta.The main types of reservoir rocks include fine gravelstone,inequigranular sandstone,sandstone and siltstone.Different types of rocks differ significantly inphysical properties.The analytical results of rocks with such a genesis can be middle-low permeabilityreservoirs,and there exists a certain correlative relation among their lithologic characteristics,physicalproperties,electricity and oil potentials;moreover,a direct correlation between porosity and permeabilityis recognized.Obviously the distribution of the reservoir rocks are controlled by sedimentary microfacies.