| For a number of years, Jilin oil field gives priority to low porosity , low permeability and low saturation. It bases on dynamic analysis and the knowledge of parts of reservoir to carry out the exploration , especially in the previous areas. With the development of the oil field getting deeper and the degree of exploration getting improved , in the developed reservoir , succeeding layers'potential with low permeability has a large of proportion .Although proven reservers which are newly increased are most difficult to exploit, the intrinsic potential of reservoir has a significant proportion of reserver. This paper takes the Saertu reservoir in Yingdong. It describes the spatial distribution and connectivity of the reservoir as well as builds the 3D reservoir model.These base on tectonics , petroleum geology, logging geology, mathematical geology ,well-drilling material, well-logging material and production performance material. For one year , we have finish the work as follows: division and correlation of the layers , study of microtectonics , second interpretation and evaluation of well-logging , study of flow unit and building 3D geological model . We divide the six sand bed groups into seventeen layers; definitude the following microfacies types:underwater distributary channel ,finger point bar, point bar, sheet sand, distal bar as well as their distributing characteristics; redefine the lower range value of reservoir electrical property and the incidence rate of intergrated interpretation is up to 90% and the thickness of mobile potential layers is increased to 333.0 meter/62 layers as well as the possible reserves to 1460000 ton ; we also build the block fine 3D geological model and draw the flow unit figures, based on these scientific and visual geological material we may adjust to recovery schemes .
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