江汉盆地构造演化与海相地层油气成藏模式

江汉盆地自晚元古代统一的变质基底形成以后，先后经历了加里东、海西-早印支、晚印支-早燕山和晚燕山-喜马拉雅4 期构造旋回，形成前印支期地台型广海盆地、晚印支-早燕山期前陆盆地和晚燕山期以来的内陆断陷盐湖盆地。通过分析4 次构造旋回对油气成藏的控制与破坏作用，依据生烃期的早晚和油气在完成初次聚集后至最终成藏定型期间是否突破了原始封闭体系，将江汉盆地海相地层油气成藏模式划分为原生型、次生型和再生型3 种类型，并分析了各类成藏模式的有利勘探区带。

Tectonic evolution and hydrocarbon accumulation model for marine strata in Jianghan Basin

After the forming of an entire metamorphosed basement during the Late Proterozoic,Jianghan Basin experienced four tectonic cycles: Caledonian,Hercian-Early Indosinian,Late Indosinian-Early Yanshanian and Late Yanshanian-Himalayian.Because these cycles,3 kinds of basin models formed which were the open-sea basin of platform type before the Indosinian,the foreland lake basin during Indosinian and the intracontinental fault-depression salt lake since Yanshanian.The control and destructive effect of the four tectonic cycles on the hydrocarbon accumulation are analyzed.According to the time of hydrocarbon generation and whether hydrocarbon break through original closed system from the first accumulation to finally reservoir forming,the hydrocarbon accumulation for marine strata in Jianghan Basin is divided into primary,secondary and regenerated accumulation models,and the favorable prospect areas are analyzed.