Abstract: Fissures in Qianmiqiao buried hill of Ordovician are identified controlling reservoir quality and being the major permeable channels of producing capability by a large number of static and dynamic data, based on the research of reservoirs characteristic and hydrocarbon reservoirs distribution. Reservoirs can be classified into the microfissures-proposed type, mainly. The fissures in the research area can be classified into the structural fissures, solution structures, and joint fissures. This paper divides the fissures into the larger and small scales and sets up the fissures simulation. The high fdensity mainly developed in the super-karst under the unconformable interface range from 20 to 80 meters on the top of buried hill, with the characteristic of strata distribution, partial richness, and distinct difference between wells

Key words: Dagang prospect area, Qianmiqiao buried hill, fissure, fissure modeling, oil and gas field development