Abstract: The characteristics of Koveikqin hydrocarbon accumulation belt are presented, in which Koveikqin condensate gas field is an important target for development. This paper described in detail the hydrocarbon generation, migration process and geological structures of the accumulation belt, stratigraphic features of pay zones and exploratory results, and made an analysis of changes of net pay thick ness, porosity and permeability, and a prediction of gas reservoir distribution within the belt. In addition, a work planning for assisted exploration in Koveikqin field provided by the PetroRussia Company was proposed. Since then, its gas reserves have gone up obviously. It is scheduled that Koveikqin condensate gas field will be brought into commercial production.

Key words: petroleum, natural gas, oil and gas field, oil and gas origin, oil and gas migration, reservoir, explorat ion, prediction