Formation sensitivity analysis of Sanduo Hongzhuang oil field

Through core flow experiments, the evaluation of reservoir sensitivity in Hongzhuang oil field is developed, and the damage mechanism is found, which provides references to reservoir protection and promotion. The reservoir sensitivities are negative-medium weak flow sensitivity, medium weak-medium strong water sensitivity, negative-medium weak acid sensitivity, weak-strong alkali sensitivity and medium weak salt sensitivity at Duoyi formation; strong velocity sensitivity, negative water sensitivity, negative acid sensitivity, negative salt sensitivity at Duoer formation.