江南-雪峰隆起北缘巨量油气成藏与破坏的流体包裹体40Ar/39Ar年代学研究

The exact determination of hydrocarbon accumulation and destruction ages in the giant hydrocarbon accumulation belt is the important scientific evidence and an unsolved scientific problem for petroleum geology studies in northern margin of Jiangnan-Xuefeng Uplift. In this study, four representative paleo-reservoirs in northern margin of Jiangnan-Xuefeng Uplift are chosen as the research objects. Hydrocarbon bearing fluid (tectonic veins or minerals associated with bitumen and oil in faults, structural joints or reservoirs), which has a well-defined response relationship with tectonic activity and hydrocarbon migration and accumulation, is a testimony mineral for tectonic processes and hydrocarbon migration processes. Fluid inclusion 40Ar/39Ar dating method, which has advantage in determining multiphase ages, is selected to determine the hydrocarbon accumulation and destruction ages. This study will reconstruct a chronological framework quantitatively for the hydrocarbon accumulation and destruction in marine strata in northern margin of Jiangnan-Xuefeng Uplift which controlled by intra-continental multiphase tectonism. This study will provide exact geochronology evidences for hydrocarbon accumulation and destruction mechanism study in northern margin of Jiangnan-Xuefeng uplift.

江南-雪峰隆起北缘巨型油气成藏带油气聚集和破坏时间的精确厘定是研究江南-雪峰隆起北缘海相油气富集规律的科学依据和尚未解决的科学问题之一。本研究选择该成藏带内具有代表性的麻江、凯里、王村、南山坪四个古油藏为研究对象，以构造作用和油气成藏及破坏作用过程中的一体化产物-含烃类流体（断裂带内、节理内或储层内沥青(或原油)伴生的脉体或矿物）为切入点，从构造作用与成藏作用流体行为响应关系的角度，选择具有厘定多期流体年龄优势的流体包裹体40Ar/39Ar同位素定年方法进行油气成藏和破坏时间的研究，定量重建复杂、多期陆内构造作用控制下的江南-雪峰隆起北缘油气多期富集与破坏的年代学格架，为江南-雪峰隆起北缘巨量油气聚集与破坏的地质规律研究提供年代学依据。