北部湾盆地福山凹陷古近系流沙港组层序地层样式及其研究意义

Sequence Architectures of Paleogene Liushagang Formation and Its Significance in Fushan Sag of the Beibuwan Basin

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.

To explore the sequence stratigraphic architecture of Paleogene Liushagang Formation （E/s） in the Fushan sag of Beibuwan basin, by using drilling, logging, seismic data, the isochronous sequence stratigraphic framework in systems tracts level has been established. Aiming at different tectonic units in Els of Fushan sag, with comprehensive consideration of tectonicactivities, basin marginal background, provenance supply, etc. , sequence strata architecture of Els can be extracted into four types, namely, fault controlling steep type, multi stage fault terrace type, flexure break type, and gentle slope break type. The features of sequenee architecture, different types of traps developed in different sequence architecture. It is of great significance to the hydrocarbon exploration in Els, Fushan sag.