Abstract: Appraisal of oilfield production efficiency demonstrates the critical change of oilfield development from production-oriented to benefit-oriented style, and provides valuable parameters in determining investment, lowering cost and improving oilfield economic benefits. With the en single-well’s try of Tarim oilfield’s produce to medium to high water cuts, according to single-well’s different technical and economical conditions, this paper establishes model and chart for the present economic minimum flow rate, maximum water cut, and well-stimulation economic minimum oil increment in single-well. These results gave a convenient tool for appraisal of well production and stimulation.

Key words: efficiency appraisal, measure, economic limit, oil production cost