Abstract: The $P_{2}w^{2}_{3}$ sand layer of Upper Wuerhe reservoir in East District No.5 in Karamay field is the major oil reservoir with serious vertical heterogeneity and composed of 3 sets of clastic reservoirs. Because of the influences of reservoir lithology and cementation, it is hard to take shaped cores from the coring section in the major reservoir, and lacks the lab-analysis data of their dynamic sensitivities. In this paper, the sensitivity characteristics of glutenite sections with different cementation types and degrees are analyzed using several kinds of physical models, including the sensitivity-damage mechanism analysis from many aspects such as type, occurrence and relative content of clay minerals as well as development features of pore throat in these reservoirs. This study provides relevant theoretical basis for modification of field development plans and measures.

Key words: Karamay field, Upper Wuerhe formation, heterogeneity, cementation type, latent sensitivity, dynamic sensitivity, damage mechanism