Based on cores， logs and seismic data， four intermediate cycles(sequences) can be recognized in the studied strata with the principle of base\|level， which are called MSC1， MSC2， MSC3， MSC4 in descending order. There are two types of sequences in these cycles: clastic rock sequence and gypsum\|salt rock sequence. Clastic rock sequence is usually the product of base\|level rise hemicycles which are characterized by mudstones interbedded with turbidites and sandy deposits of delta front. Gypsum\|salt rock sequence is the product of base\|level fall hemicycles  which are characterized by thick\|bedded halite，gypsite， gypsum\|salt rock， interbedded with sheetlike turbidites. Three depositional systems are recognized， namely deep lake\|turbidite fan，deep water salt lake and shallow lake\|delta.Evolution and distribution of these depositional systems and facies are interpreted in these cycles. According to the characteristics of reservoirs， source rocks and cap rocks， the favorable reservoir members， facies and exploration zones are predicted.