Abstract:

The girdle distribution of hydrocarbon in Dongying Depression bears close inherent relation with the properties and strenghs of the fields of paleobiology, paleogeotherm, paleostressand paleofluid potential.The girdle distribution of oil and gas puts forward the "field-girdle corresponding theory".Paleobiology field determines the character and abundance of deposited organic matter; paleogeothermal field provides the energy with which organic matter could be transformed into hydrocarbon; paleofluid potential and paleostress fields offer power and space for hydrocarbon migration and preservation.Therefore, the ring-type distribution of the above mentioned four fields has controlled the girdle distribution of oil and gas.Seeking for oil and gas enriched zone around the high potential belts of the four fields is of guiding importance in hydrocarbon exploration.