摘要
珠江口盆地白云凹陷北坡—番禺低隆起地区受多期构造叠加影响,具有长期生烃、多源供烃的烃源特征,发育包括断裂体系、输导砂体、构造脊、不整合面等在内的油气输导体系。研究区油气主要输导层位为T60(23.8Ma)-T50(18.5Ma)和T40(16.5Ma)-T35(13.8Ma),其中T60-T50广泛发育连片的古珠江三角洲—滨岸沉积砂体及其上覆的巨厚泥岩,为油气的横向输导及长距离运移提供了必要条件,而T40-T35发育的三角洲、斜坡扇与低位进积复合体是研究区有利的油气储集体和侧向输导体。广泛发育的第三系同沉积反向断层是研究区油气运移的纵向输导体系。断层、砂体、构造脊及不整合面等输导体系相互匹配,形成了"构造脊"背景下的"网络式"复合输导体系。
The area from the north slope of Baiyun sag to Panyu low uplift, Pearl River Mouth basin, is characterized by long-time hydrocarbon generation and multiple-source hydrocarbon supply due to its multiple episodes of tectonic superposition, where a complex hydrocarbon transport system is developed, including fault systems, connected sandbodies, structure ridges and unconformities. There are two main tranport horizons, i. e. T60 （23.8Ma） - T50 （18.5 Ma） and T40 （16.5 Ma） -T35 （13.8 Ma）, in this area. In the horozon T60 - T50, the sandbodies of palaeo-Pearl River delta-strand facies and its overlying thick mudstones are widely and continuously developed, providing the necessary conditions for lateral hydrocarbon transport and long migration. By contrast, the deltas, slope fans and lowstand prograding complexes developed in the horizon T40 - T35 can become favorable hydro- carbon reservoirs and lateral carriers in this area. The well-developed Tertiary synsedimentary anti- thetic faults are the vertical hydrocarbon transport ways. The interaction between faults, sandbodies, structure ridges and unconformities has resulted in a ＂network＂ type of complex transport system un- der a structure-ridge setting in this area.
出处
《中国海上油气》
CAS
北大核心
2009年第6期361-366,共6页
China Offshore Oil and Gas
基金
国家科技重大专项"大型油气田及煤层气开发"项目"近海大中型油气田形成条件及勘探技术"课题"近海隐蔽圈闭油气藏勘探技术"(2008ZX05023-2)部分研究成果
关键词
白云凹陷北坡—番禺低隆起“网络式”复合输导体系
断裂体系
输导砂体
不整合面构造脊
the north slope of Baiyun sag-Panyu low uplift
a ＂network＂ type of complex transport system
fault system
carrier sandbody
unconformity
structure ridge
