珠江口盆地番禺低隆起层序地层格架下地层圈闭发育模式

番禺低隆起是珠江口盆地最有利的油气勘探区域之一。通过对珠江口盆地番禺低隆起三维地震资料解释,结合钻井、古生物、测井等资料,开展层序划分对比工作,建立了区域层序地层格架,揭示了研究区等时地层结构的基本特征,阐明沉积层序的发育模式和控制因素,并对层序格架内地层圈闭的发育模式进行了研究。结果表明,在珠江口盆地不同演化阶段,研究区具有不同的沉积层序发育模式,其层序结构样式和沉积体系的发育分布主要受海平面升降变化和断裂坡折带所控制,并由此在该区内形成3类有利的地层圈闭,对今后在该区的油气勘探具有重要指导意义。

Development Mode of Stratigraphic Traps in the Sequence Stratigraphic Framework of Panyu Low Uplift

Panyu Low Uplift was one of the most favorable oil and gas exploration areas in Pear River-mouth Basin,where hydrocarbon accumulation was favorable.It was badly needed to develop new structural traps to expand the achievement of oil exploration in the area.The sequence stratigraphyic framework of the area was built and the sequence structural characteristics,depositional evolution and its control factors were presented by using 3D seismic interpretation data,well log curves and paleontology,and the development modes of stratigraphic traps in the sequence stratigraphic framework were studied.The results show that there are several different depositional sequence development modes during the evolution stage of Pearl River-mouth Basin.The sequence structure and distribution of the depositional systems are mainly controlled by the sea level changes and fault slope-break zone,and there are three beneficial types of stratigraphic traps formed in the studied area.