Abstract: On 2, September 1994, the cyclic gas injection began in pilot area of Xiwuy1-3 condensate reservoir, Kekeya condensate oil-gas field. As of June 1999, the cumulative gas injection amounted to 3.82x 10⁶ m,with cumulative gas production of 3.47x10⁶ m³,injection/ production ratio of 1.25,and cumulative condensate oil production of 68.3x10⁴t. By using this process, the formation pressure was maintained, insitu retrograde condensation was effectively restricted, percolation flow capacity was improved, thus greatly increasing the condensate oil recovery factor. By the end of June 1999, good result of 38.6% of its condensate oil recovery percent was obtained, with incremental recovery factor of 17.6% compared with the depletion drive process.

Key words: Kekeya condensate gas reservoir, Pilot test, Cyclic gas injection, Development