Abstract: New type cuIves of dimensionless cumulative prođuction versus dimensionlexs time for production declinc analysis are developed based on Arps’ decline equation. Decline index(n), initial decline rate (Di) and initial production (Qi) can be obtained by macthing field data with the type curves. The reliability of the type curves has been confirmed by well production data.

Key words: production declinc, Decline curves, Decline index, Decline rate, Initial productjon