Relationship between faults and hydrocarbon accumulation in Panyu low massif and north slope of Baiyun Sag,Pearl River Mouth Basin

The relation between faults and hydrocarbon accumulation is researched by the analysis of fault classification,activity history, and petroleum charge history in the Panyu low massif and the north slope of Baiyun sag.Two kinds of faults including long active fault and late active fault exist in the area.The active periods of these two kinds of faults matched the periods of hydrocarbon charge,so they should have acted similarly in hydrocarbon charging.Exploration results and ample evidence show that faults are the main passage for oil and gas migrating vertically and the hydrocarbon accumulation is controlled in Neogene by current static fault sealing in which the main control factor is lithologic juxtaposition.The research about the evolvement of target layers,traps and fault-seal should be strengthened and the traps which are in the path of petroleum migration and have static fault sealing are easier to be explored successfully.