Abstract:

 As one of the most foundational and important matters in the study of oil-gas reservoir development engineering, the high resolution sequence stratigrapy analysis is a key technique, and the division and correlation of fluvial stratum is one of the most difficult problems for the disturbing of autocyclicity. In this paper, the authors analyze the relationship between the composition elements of fluvial stratum and the processions of the cycle. Four identifying patterns of the base level cycle in fluvial facies are generalized, including the channel shape and overlying pattern, facies sequence and association, the feature of autocyclicity, the feature of fluvial plain. It has been suggested that the correlation of short-term cycle must be based on the tendency of the longterm cycle.  The authors also analyze the relationships among the overlying pattern, the retention grade of the sandbodies and the A/S in the processions of the cycle.

Key words: reservoir development, fluvial facies, base level cycle, reservoir subdivision and correlation