RELATIONSHIP BETWEEN FLUID POTENTIAL AND HYDRCARBON MIGRATION AND ACCUMULATION-A CASE STUDY OF GUDONG AREA

Fluid Potential is a comprehensive representation of all underground fluid energy.Different fluids (oil,gas and water) are affected by fluid potential field and moved according to the respective potential field distribution.Through exploring model of spatial distribution of underground fluid,the structure of fluid systems can be affirmed in a basin,the understanding about migration and accumulation of oil may be improved,the favorable accumulating area of oil and gas is predicated and exploring success ratio is increased.Two types of underground fluid potential in Gudong area can be distinguished: the high potential fields are coincided with the distribution of active generating sag and are main sources of hydrocarbon generation and dynamic force; and the low potential fields are nearly located in the present oil and gas fields.Therefore,the potential area for petroleum migration and accumulation can be ascertained according to the distribution of low potential field.