Abstract:

Huabei Oilfield Company has obtained many important achievements on the study and exploration of stratigraphic reservoirs in recent years.In the Bayindulan Sag of the Erlian Basin,guided by new exploration concept of searching for stratigraphic-lithologic reservoirs,the Baolige oilfield mainly composed of lithologic re-servoirs was finally discovered through establishing isochronous stratigraphic framework based on sequence stratigraphic study,determining potential exploration areas by comprehensive study of structure and sedimentation,establishing the pooling pattern of updip pinchout lithologic reservoir of fan delta front sand based on reviewing old well data.While in the Jizhong Depression,new breakthrough was made by deepening the study of reservoiring conditions in Changyangdian buried hills and establishing a new reservoiring pattern of "new-generating,old-accumulating and old-sealing".These two successful cases shed light on the future exploration practices in similar areas.

Key words: Bayindulan Sag, Changyangdian buried hill belt, stratigraphic-lithologic reservoir, Huabei oilfield