Abstract: This paper presents the evaluations of the injected water and formation water compatibility and the injected water on reservoir damage through Di-2 well area's reservoir sensitivity experiment, showing that this reservoir is of medium-serious water-sensitivity, with critical salinity of 9 339.32 mg/L, good compatibility, and when injected rate is up to 30 times of pore volume, the permeability loss factor is up to 41.6% in average by simulated evaluation of reservoir damage due to water flooding.

Key words: Junggar basin, Di-2 well area, well block, sensitivity, injected water, formation water, reservoir damage, permeability loss factor