Jilin oilfield discontinued the production of 93 and 87 block of Yingtai oil production plant. And the well is given to the Deshi group. The group is responsible for the maintenance, operation, production and stimulation of oil Wells. Deshi group Cooperates with Peking University to develop "microbiological technology for high water-bearing heavy oil reservoirs". And the pilot test of microorganism single well was carried out in the a22-27 well in white 87 block. After 3 months of combined injection and well closure with exogenous microorganisms and activators, 267 days of production were accumulated, 541 tons of oil were produced, and 78.3 % water cut was obtained.
Since September 2016, 24 production wells have been resumed and 29.1 tons of crude oil have been produced per day in this block through workover operations and pilot tests of isochoric flooding. In the future, about 50 - 60 production wells are expected to be restored by a series of technical means, such as workover operation and isotacticity flooding expansion test, and the daily production of crude oil is about 80 tons.
