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为探究北部湾盆地福山凹陷古近系流沙港组层序地层样式,运用钻井、测井、地震等资料,建立了流沙港组等时层序地层格架,在此基础上,综合考虑构造活动、盆缘背景、物源供给等影响因素,并结合福山凹陷在不同构造部位、不同层段以及层序发育的时空差异性特点,将流沙港组层序构成样式总结为4种:断控陡坡型、多级断阶带型、挠曲坡折带型和斜坡型.通过对以上层序样式特征及其内部沉积特点的研究,总结了在不同层序构成样式控制下发育的油气藏圈闭类型,为福山凹陷油气藏勘探提供了重要的指导意义.
In order to explore the sequence stratigraphic patterns of the Qinsha Formation in the Funeral Sag of the Beibuwan Basin, the isochronous sequence stratigraphic framework of the Liushahagang Formation was established by means of drilling, well logging and seismic data. On this basis, the sequence of structural activities , Background of basin margin and supply of provenance, and combined with the spatial and temporal differences of the Fushan sag in different tectonic positions, different intervals and sequence stratigraphy, the sequence stratigraphic patterns of the Liushaha Formation are summarized as follows: fault steep slope Multi-grade fault zone, flexural slope break zone and ramp type.Based on the study of the above-mentioned sequence features and their interior sedimentary features, the trap of oil and gas reservoirs developed under the control of different sequence composition styles Type, providing an important guiding significance for the exploration of oil and gas reservoirs in the Fukuya Sag.