Abstract: The characteristics of pore structure for ihe major reservoir in Kekeya Condensate Gas Field are studied in this paper,based on thin section and petrophysical data from the wells Ke 233 and Ke 30,and X--ray diffraction and SEM data from other wells . The author indicates that the formation under X₈ section of Xihefu group is of no value for exploration,since it is in the later period of late diagenesis and the secondary pore volume is greatly reduced.

Key words: condensate gas field, reservoir pore structure, secondary porosity