Types of the heterogeneous carbonate reservoir are various and its genetic mechanism is complex. The hole，cave and fissure with different genesis，formation mechanisms and scales always develop in company，thus it is difficult to classify reservoir types only using static data（outcrop，core，logging and seismic data，etc.）. The carbonate interlayer karst reservoirs in the Lower Ordovician Yingshan Formation of the western Tazhong Ⅰ gasfield was chosen as an example，and the carbonate reservoirs in the study area were classified into three types：cavity，fracture-hole and hole mainly using dynamic data（acid fracture，well test，production test，etc.）with auxiliary of static data. Combining with seismic forward and well drilling data，the seismic reflection characteristics of the carbonate reservoir are divided into three types based on geophysical response characteristics：string beads reflection，flake reflection and messy reflection. Small caves，fractures and holes are more developed in the carbonate reservoirs with bead-like reflection，in which the fracture-hole reservoir is the main space providing liquid followed by the cave reservoir；fracture-hole and hole reservoir are the main space providing liquid with flake-like reflection and messy reflection respectively. The carbonate reservoirs with three kinds of seismic reflection developed with inheritance，the carbonate reservoirs with some messy reflections were reconstructed later strongly by burial dissolution to form carbonate reservoirs with bead-like and flake-like reflection. Besides，the oil and gas bearing characteristics of relatively tight reservoirs and its continuity were discussed preliminarily，and it is believed that the oil and gas in relative compacted segments accumulates in channels and throats in adsorbed or in free state，and the reservoirs are horizontally continuous and connected to some degree.