Abstract: Taking HA601wellblock in Halahatang oilfield as an example, based on the reservoir prediction, guided by the Ordovician outcrop in Tabei area (northern Tarim basin), this paper presents three genetic types of fractured?vuggy reservoir formed in the karstification, including tubulose underground river caves, caves controlled by faults and rivers, caves controlled by faults; considering the difficulties in fracture?vug unit division, it provides two divisive methods of static reservoir prediction and numerical well test to confirm the boundary of fracture?vug units. The study indicates that the key factors for controlling fracture?vug units in carbonate interstratum area is river systems in Lianglitage formation and faults. Based on the scale of reservoir body, geological reserves, energy index, genetic type and pressure level, it establishes the evaluation criterion for fracture?vug units in carbonate interstratum area, and applies it to all the well?controlled and nonwell?controlled units, which provide a reference for well deployment and development adjustment of Halahatang oilfield in the future