三水盆地油气地质特征及资源评价

The Geological Characteristics of Petroleum and the Reserves Assessment in Sanshui Basin

三水盆地位于珠江三角洲的西北部,与油气有关的沉积地层主要是白垩系和下第三系。经野外露头剖面和钻井岩性分析,下第三系布心组发育深湖、半深湖相泥岩、碳质泥岩和泥灰岩,是区内主要的烃源岩。布心组二段为湖泊极盛时期沉积,以暗色泥岩为主夹碳酸盐岩沉积,是盆地内主力生油岩系。烃源岩已进入成熟阶段,处于生油高峰期。三水盆地的资源量期望值为0.5271×108t,为具有一定勘探潜力和开采价值的含油气盆地。

Sanshui basin is situated in the northwest of Pearl River Delta.The main source rocks are Buxin and Xibu Formations of Upper Cretaceous and Lower Paleogene Formation.The sediments are mudstone,shale,carbonaceous mudstone and marl of deep and semi-deep lake facies.The second segment of Buxin Formation（E1-2b2） is the most important source rocks which was formed in the largest term of the lake basin.The sediment is mainly dark mudstone and carbonate.The source rocks are matured and in the peak stage of oil generation.Because of the reserves more than 0.5271×108 t,It is considered that the Sanshui Basins are most favourable for oil exploration.