A part of deep reservoirs of the Zhaowa-Anpeng Oilfield in the Biyang Depression belongs to deep-basin oil pool, i.e., deep-basin tight-sand oil pool. The formation conditions are detected by the concept and analysis technique of deep-basin gas pools. The deep reservoir of the Zhaowa-Anpeng Oilfield has the typical feature of deep-basin oil and gas pool. The structure is a nose-shape monocline that descents toward the center of hydrocarbon occurring from the northwest to southeast. The distribution of oil and water in the Zhaowa-Anpeng Oilfield is relatively complex. There is deep-basin oil pool that the oil/water contact occurs at the updip end of the accumulation in the horizontal continuous reservoir. It is a tight-sandstone oil pool, the reservoir has a low permeance, and the formational pressure is lower than normal. In the Biyang Depression with high-degree exploration, if this method is applied, new resources will be discovered.