Abstract:

Laoyemiao structural belt is a rolling anticline structural belt.Three grades of faults that developed there are:1.EW NE strike faults that controlled sag;2.NNE-NE strike faults that controlled oil;3.NW--NW-W strike faults that controlled traps.The deep lake facies mudstone of 4～5 submembers of Sha-3 member and shallow to semi deep lake facies mudstone from Sha-1 member to the third member of the Dongying Formation are two main sets of source rocks whick have all reached maturation stage.Their organic matter is basically mixed and humic types with higher organic abundance.The reservoir bodies are braided river channel sand bodies,subaqueous gravity flow deposits,subaqueous distributary channel sandbodies,river mouth sand bars and turbidity sand bodies in deep water.The reservoirs are characterized by high porosity and high permeability.The types of hydrocarbon pools are mainly controlled by the extension of rifted basin,contemperaneous faults and sedimentary facies.Rifting cycles controlled the distribution of petroleum system,the contemperaneous faults increased hydrocarbon bearing area,and the collocation of reservoir facies determined oil and gas enrichment.

Key words: petroleum geological property, controlling factor, rolling anticline, Laoyemiao