Abstract: As the basis of formation protection,formation characteristics analysis and formation sensitivity evaluation are necessary.In order to make clear the formation damage of shallow B304 well area in south steep slope zone during the development process,the velocity sensitivity,water sensitivity,acid sensitivity and alkali sensitivity analysis have been carried out.The research results should be applied into Zhaowa oilfield production,and appropriate formation pretection measures should be adopted so as to guarantee no or less formation damage,stable and increased production.