THE EXPLORATION POTENTIAL IN THE PALEOZOIC IN CHIPING STRUCTURAL ZONE

Chiping structural zone is a north north east trending fracture anticline belt being complicated by secondary faults,which located in the center of the northwest plunging area of Luxi uplift.The features of structural evolution and the conditions of hydrocarbon accumulation were systematically analysed in the paper.Due to compression and uplift at the end of the Triassic,the Lower and Middle Triassic sequences were widely eroded and Lanliao fault was formed simultaneously.Controlled by Lanliao fault,Chiping structure was finally formed during the Yanshanian period.It is favorable for matching of the secondary generation of the Paleozoic source rocks and the formation of traps.There are 2 sets of source rocks,i.e.the Lower Paleozoic open (limited) sea dark rocks and the Upper Paleozoic coal bearing sequences.The weathering crust at the top of the Lower Paleozoic can act as reservior.The key factor for formation of hydrocarbon pools is the seal.There are more potential for hydrocarbon exploration in the C P residual area of the zone.