Abstract: The petroleum reservoirs in Lower Paleozoic carbonate rocks in Tarim basin occur as layered or massive shapes in its exterior configuration,but in fact its interior structures are composed of faults and fractures which connect with pores and cavities, forming network-like petroleum system. And they are characterized by abnormal heterogeneity. Therefore, don't blindly negate resource potential or abandon petroleum prospect only due to low-productivity wells and water producing wells drilled within hydrocarbon-enriched domain or oil-gas fields. To pay attention to technology of payzone protection is the key for high production. And largescale acid fracture treatment of the reservoirs is another key for high and steady production. It is the only way for understanding of the resource potential in this area and for making proper decision for identifying giant oil/gas fields as early as possible. According to available exploratory results herein,the domain can be classified into 5 reservoir assemblages,11 favorable pool forming zones and 16 favorable blocks for hydrocarbon prospect, of which Lunnan, Tazhong, Yingmaili and Tahe would be as the most favorable areas.

Key words: Tarim basin, Early Paleozoic, carbonate rock, strategy for exploration, network, reservoir