Abstract: This paper presents a methodologv of how to various dat to evalate torniadn drimage and productivity in the northwestern margin of Junggar Easin. it is pointed our that analylical methods of well test, production history and single well history have wide applicability in the evaluation of formation damage. A new methodology is proposed to evaluate reservoirs using production rate predicting method, which is indicated to be feasible from the field data.

Key words: formation damage, ideal production rate, true production rate