Abstract: The third Feixianguan formation oolitic reservoir in the Tongnanba tectonic zone is low-porosity，low-permeability
and compact limestone. We make use of logging，core and slice to discuss the main controlling factors from respects of tectonic，
sedimentology and diagenism. The results show that the oolitic reservoir is controlled by the sedimentary face，micro-
palaeogeomorphology，tectonic movement and diagenism. The preconditions of the oolitic reservoir growth is the core of
intra-platform shoals，and the high spot of the ancient micro-landform provides the indispensable material basis；the key is the
extent and the length of the exposure to air and transformation by fresh water leaching. The tectonic disruption makes possible
the connection between the pore and the hole of the reservoir，and improves the infiltration fluid ability of the unit. The well
match of the multi-factors may form the good reservoir.

Key words: Tongnanba tectonic zone, oolitic reservoir, main Controlling factors, sediment faces, tectonic movement