Characteristics of neotectonism and their relationship with late hydrocarbon accumulation in the Bohai sea
渤海新构造运动及其对晚期油气成藏的影响

Since late miocene (about 5.2 Ma B.P. or so), the tectonic evolution of the Bohai Sea Basin had entered into the neotectonic period which was the most active period after rifting tectonic movement. The neotectonism of the Bohai sea had brought about migration of the sedimentation center, basalt breaking forth, frequent earthquakes, deep and huge faults inheriting activity, and a lot of shallow faults being created. There has been active and intermittent stages of tectonic movements in Bohai sea neotectonism, and the movement intensity of the sea area was stronger than that of the land area. Being influenced and controlled by the Bohai sea neotectonism, many tectonic anticline traps had been formed, the oil and gas transporting systems had been optimized, hydrocarbon had been generated fast from source rocks, and oil and gas reservoirs had been formed in episodic charging process during late cenozoic period. Illustrated by the example of PL19-3 oil and gas reservoir, authors summarized late and dynamic hydrocarbon accumulation models controlled by the Bohai Sea neotectonism.