Sedimentary system is analyzed deeply guided by the correct geologic model by using the comprehensive complete set of technologies of geology, logging and dynamic data beginning with reservoir productivity. Vertical evolution and plane spread of the sedimentary facies are summarized. The reservoir in which exploratory wells are drilled is evaluated in various types and geologic factors of controlling the reservoir quality are analyzed through the study of diagenetic history rebuilding, reservoir evaluation based on permeability and sedimentary facies classification. Then the interval of good productivity contribution and probably favorable reservoir areas are pointed out. It has direct significance on the exploration and production in the same type of oil reservoir.
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