淮南煤田二叠系基准面旋回划分与煤聚积规律

淮南煤田二叠系是以三角洲－滨岸平原相为主的沉积，本文运用地层基准面原理，通过岩心，测井资料的综合分析，对淮南煤田二叠系进行了不同周期地层基准面旋回分析，识别出短期，中期，长期三种规模的地层旋回，通过对比分析，建立了该区高分辨层序地层格架，研究表明，聚煤作用出现于基准面旋回的一定位置上，叠置在长期基准面下降时期的中期基准面旋回后期是成煤的最有利时期。

THE STRATIGRAPHIC BASE-LEVEL CYCLE DIVISION AND COAL ACCUMULATION REGULAARITY OF PERMIAN IN HUAINAN COALFIELD

The Permian in Huainan coalfield is a set of deltaic coastal deposition.Using the principle of stratigraphic base level,this paper analyzes the base level cycles in different orders in the Permian of the Huainan coalfield based on the drilling cores and log curves.Three orders of base level cycles,the short ,mid and long term,can be recognized in the studied profile.On the basis of base level correlation,the high resolution sequence stratigraphic framework in the studied area is established.It is shown that the coal accumulation occurs in a certain place of the base level cycles.The later stage of mid term base level cycle packed on the long term base level fall is favorable for coal accumulation.