| Laohekou oilfield lies in the south ramp region of Chengbei sag, rich in source. Kinds of reservoirs developed in the Eogene system formation, while the exploration work is beginning with the proved reserve of 338×104 ton. To clear the exploration potential of the Eogene system of the oil, this paper used the principal of high resolution sequence stratigraphy to divide and correlate formations based on the formation characteristics of the oilfield. This paper classified the Eogene system formations as 4 sequence sets, 9 sequences, and built the isochro-stratigrphic frameworks. Using core, logging, well logging, seismic data and so on, it can conclude that the area developed fan delta, beach bar, turbidite fan and total 8 kinds of depositional facies. This paper used the technologies of synthetic seismogram, seismic forward simulation etc to clarify seismic reflection characteristics of kinds of reservoirs and recognized and delineated 18 sandstone bodies with the square of 18 km2. Based on the genesis and shape, the found reservoirs can be generalized as 4 types, i.e. stratigraphy overlapping reservoirs, lithologic reservoirs, structural reservoirs and composite reservoirs. The control factors and distribution rules were researched about the different types of reservoirs by typical reservoir dissecting. Combining the geological research result, the interest targets were selected to locate well site. In all 4 targets were put forward, among which 2 targets were adopted that the predicted play area was 18 km2, the predicted reserve is 1530×104 ton. And 1 wells have been drilled that both have commercially found hydrocarbon and made good exploration purpose. This paper made the main exploration play beds and size of Laohekou oilfield clear and made a significant instructing function for the following exploration and deployment.
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