Abstract：Located in the western part of Taibei Depression, Tuha compressional basin, Tuha Oilfield is characterized with complex geological features. Firstly reservoirs are most layered and controlled by structure and lithology. Secondly, there is no uniform oil-water interface between fault blocks, and every block has different sets of oil-water systems. Thirdly, separations between reverse faults are less than ten meters. Finally, reservoirs are mainly thin sand-mud interbeds, and single sand thickness is about 2 to 4 meters. So two problems need to be solved: small fault sculptured and thin interbedded reservoir characterization. We use approaches provided by GeoEast interpretation sub system for fault identification and reservoir characterization. Both fault and reservoir distributions are clearly identified. Most hydrocarbon detections by DHAF are proved by drilling data. Based on our research, favorable exploration targets are predicted for the future exploration.
