Abstract: Devastation of percolation condiuon in oil-searing zones resulting from scaling in bottom hole and near-well bore formation as well as fine migration accumnuiatior and swelling within reservoir is the major averse control onificant decline in fluid production of Baikuquan oilfield. Experiments show that percolation condition of oil-bearing zolies can be improved using acidizing technique and then fluid production can increase oy a wide margin. Such operations as water detection and blocking should precede acidizing treatment. The cases study showed that the optimum can be obtained with micellar acid acidizing.

Key words: Baikouquan oilfield, Acidizing, Oil-bearing zone, Percolation condition